RETRACTION: Y. Qin, C. Liu, G. Peng, L. Huang, C. Liang, H. Li, Z. Wu and L. Yang, “ Structural Characteristics and Development Model of Fluid Diapirs Within the Structural Transition Zone, Northern South China Sea,” Geological Journal59, no. 7 (2024): 1906–1923, https://doi.org/10.1002/gj.4968.
The above article, published online on 28 April 2024 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors; the journal Editor-in-Chief, Ian D. Somerville and Yunpeng Dong; and John Wiley & Sons Ltd. The retraction has been agreed as some of the data included within the article was not authorized for publication. Furthermore, the authors are not confident that the fluid diapir labels shown in figure 7 are correct and admit they may be problematic. As a result the editors have decided to retract this article.
返回:Y.Qin, C. Liu, G. Peng, L. Huang, C. Liang, H. Li, Z. Wu and L. Yang, " Structural Characteristics and Development Model of Fluid Diapirs Within the Structural Transition Zone, Northern South China Sea," Geological Journal 59, no: 1906-1923, https://doi.org/10.1002/gj.4968.The 上述文章于 2024 年 4 月 28 日在线发表于 Wiley Online Library (wileyonlinelibrary.com),经作者、期刊主编 Ian D. Somerville 和 Yunpeng Dong 以及 John Wiley & Sons Ltd.(约翰-威利父子有限公司)协商,已被撤回。之所以同意撤稿,是因为文章中的部分数据未经授权发表。此外,作者对图 7 中显示的流体二叠纪标签的正确性缺乏信心,并承认这些标签可能存在问题。因此,编辑决定撤回这篇文章。
{"title":"RETRACTION: Structural Characteristics and Development Model of Fluid Diapirs Within the Structural Transition Zone, Northern South China Sea","authors":"","doi":"10.1002/gj.5062","DOIUrl":"https://doi.org/10.1002/gj.5062","url":null,"abstract":"<p>RETRACTION: <span>Y. Qin</span>, <span>C. Liu</span>, <span>G. Peng</span>, <span>L. Huang</span>, <span>C. Liang</span>, <span>H. Li</span>, <span>Z. Wu</span> and <span>L. Yang</span>, “ <span>Structural Characteristics and Development Model of Fluid Diapirs Within the Structural Transition Zone, Northern South China Sea</span>,” <i>Geological Journal</i> <span>59</span>, no. <span>7</span> (<span>2024</span>): <span>1906</span>–<span>1923</span>, https://doi.org/10.1002/gj.4968.</p><p>The above article, published online on 28 April 2024 in Wiley Online Library (wileyonlinelibrary.com), has been retracted by agreement between the authors; the journal Editor-in-Chief, Ian D. Somerville and Yunpeng Dong; and John Wiley & Sons Ltd. The retraction has been agreed as some of the data included within the article was not authorized for publication. Furthermore, the authors are not confident that the fluid diapir labels shown in figure 7 are correct and admit they may be problematic. As a result the editors have decided to retract this article.</p>","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":null,"pages":null},"PeriodicalIF":1.4,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/gj.5062","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142430096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Osama K. Dessouky, Kamal A. Ali, Mahmoud M. Hassan
U–Pb ages and Hf isotopic data from detrital zircon of the Silasia Formation in the Midyan Terrane record evidence for the provenance and tectonic evolution of the northern Arabian Shield. Given that the youngest acknowledged age of these detritus sediments is 735 ± 13 Ma, it is likely that the Silasia Formation was deposited during the closure of the Mozambique Ocean. The U–Pb ages define a major Mesoproterozoic peak, with two minor peaks of Neoproterozoic and Archean age. Combined with zircon Hf isotopic compositions, the sedimentary detritus of the Silasia Formation was mainly derived from source rocks formed during the Grenville Orogeny during the assembly of Rodinia, with a minor contribution from Archean and Paleoproterozoic crustal material, in addition to a limited arc‐basement supply related to the early Mozambique Ocean. The youngest Concordia age of 735 ± 13 Ma with highly variable εHf(t) values (11 to −35) indicates a complex mixture of sources from juvenile to extremely ancient. The Concordia ages at 1113 ± 11 and 1046 ± 10 Ma have positive hafnium isotope signatures (up to +10.45) that are consistent with juvenile source rocks formed during the Grenville Orogeny. Several detrital zircons with ages of 2622 ± 22 Ma and 2690 ± 7 Ma are similar to those reported in Yemen, whereas 1818 ± 19 Ma, 2071 ± 8 Ma and 2001 ± 19 Ma Paleoproterozoic ages are similar to dated outcrops in the Khida terrane in the eastern Arabian Shield.
{"title":"Hf Isotopes and Detrital Zircon Geochronology of the Silasia Formation, Midyan Terrane, Northwestern Arabian Shield: An Investigation of the Provenance History","authors":"Osama K. Dessouky, Kamal A. Ali, Mahmoud M. Hassan","doi":"10.1002/gj.5053","DOIUrl":"https://doi.org/10.1002/gj.5053","url":null,"abstract":"U–Pb ages and Hf isotopic data from detrital zircon of the Silasia Formation in the Midyan Terrane record evidence for the provenance and tectonic evolution of the northern Arabian Shield. Given that the youngest acknowledged age of these detritus sediments is 735 ± 13 Ma, it is likely that the Silasia Formation was deposited during the closure of the Mozambique Ocean. The U–Pb ages define a major Mesoproterozoic peak, with two minor peaks of Neoproterozoic and Archean age. Combined with zircon Hf isotopic compositions, the sedimentary detritus of the Silasia Formation was mainly derived from source rocks formed during the Grenville Orogeny during the assembly of Rodinia, with a minor contribution from Archean and Paleoproterozoic crustal material, in addition to a limited arc‐basement supply related to the early Mozambique Ocean. The youngest Concordia age of 735 ± 13 Ma with highly variable εHf<jats:sub>(t)</jats:sub> values (11 to −35) indicates a complex mixture of sources from juvenile to extremely ancient. The Concordia ages at 1113 ± 11 and 1046 ± 10 Ma have positive hafnium isotope signatures (up to +10.45) that are consistent with juvenile source rocks formed during the Grenville Orogeny. Several detrital zircons with ages of 2622 ± 22 Ma and 2690 ± 7 Ma are similar to those reported in Yemen, whereas 1818 ± 19 Ma, 2071 ± 8 Ma and 2001 ± 19 Ma Paleoproterozoic ages are similar to dated outcrops in the Khida terrane in the eastern Arabian Shield.","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shilong Kang, Longyi Shao, Santanu Banerjee, Shuai Wang, Tracy Frank
The mechanisms for the deposition of the Cambrian carbonate sedimentary successions remain controversial. The carbonate‐dominated successions (Stage 3 to Stage 10) are well developed in the North China Craton and they are commonly thought to represent a platform setting because of the flat top. In this study, we propose a new scenarioi, that the Cambrian successions in North China are more likely a carbonate ramp rather than a platform. Detailed sedimentological investigation for the Cambrian rocks in the Yanshan area (Stage 4 to Stage 10) reveals a total of 21 lithofacies which can be grouped into 7 facies associations, including sabkha and mixed tidal flat, shoal, carbonate tidal flat, tidal flat on shoal, protected lagoon, mid‐ramp and outer ramp to shelf basin. Sequence stratigraphy analysis of the Cambrian in the Yanshan area reveals nine third‐order depositional sequences, which shows an overall second‐order transgression. A number of sedimentary characteristics, including the gentle depositional slope, abundant open marine deposits, scattered shoals and microbial mounds, absence of slump or gravity flow sediment, domination of subtidal facies cycles and widespread deposits that formed below the storm wave‐base, indicate that the Cambrian sediments in the Yanshan area were deposited in an intracratonic carbonate ramp depositional system. This intracratonic carbonate ramp includes inner ramp, mid‐ramp, outer ramp and shelf basin facies belts, with the inner ramp exhibiting sub‐facies corresponding to tidal flat, protected lagoon and shoal sub‐facies. Sequence stratigraphy analysis indicates that relative sea‐level changes, corresponding to these nine third‐order sequences, show synchronous with the global sea‐level change across the studied sections. This consistency implies that eustatic sea‐level changes could have been a major factor for the sequence stacking patterns in the Yanshan Area.
{"title":"Ramp Depositional Model in an Intracratonic Basin: The Cambrian Sedimentary Successions in Yanshan Area, North China","authors":"Shilong Kang, Longyi Shao, Santanu Banerjee, Shuai Wang, Tracy Frank","doi":"10.1002/gj.5056","DOIUrl":"https://doi.org/10.1002/gj.5056","url":null,"abstract":"The mechanisms for the deposition of the Cambrian carbonate sedimentary successions remain controversial. The carbonate‐dominated successions (Stage 3 to Stage 10) are well developed in the North China Craton and they are commonly thought to represent a platform setting because of the flat top. In this study, we propose a new scenarioi, that the Cambrian successions in North China are more likely a carbonate ramp rather than a platform. Detailed sedimentological investigation for the Cambrian rocks in the Yanshan area (Stage 4 to Stage 10) reveals a total of 21 lithofacies which can be grouped into 7 facies associations, including sabkha and mixed tidal flat, shoal, carbonate tidal flat, tidal flat on shoal, protected lagoon, mid‐ramp and outer ramp to shelf basin. Sequence stratigraphy analysis of the Cambrian in the Yanshan area reveals nine third‐order depositional sequences, which shows an overall second‐order transgression. A number of sedimentary characteristics, including the gentle depositional slope, abundant open marine deposits, scattered shoals and microbial mounds, absence of slump or gravity flow sediment, domination of subtidal facies cycles and widespread deposits that formed below the storm wave‐base, indicate that the Cambrian sediments in the Yanshan area were deposited in an intracratonic carbonate ramp depositional system. This intracratonic carbonate ramp includes inner ramp, mid‐ramp, outer ramp and shelf basin facies belts, with the inner ramp exhibiting sub‐facies corresponding to tidal flat, protected lagoon and shoal sub‐facies. Sequence stratigraphy analysis indicates that relative sea‐level changes, corresponding to these nine third‐order sequences, show synchronous with the global sea‐level change across the studied sections. This consistency implies that eustatic sea‐level changes could have been a major factor for the sequence stacking patterns in the Yanshan Area.","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Determining subduction‐related processes is crucial for understanding lithological heterogeneity, as substantial quantities of slabs are recycled into the mantle. Molybdenum isotopes are valuable for distinguishing sources materials due to the significant isotope differences between the crust and the mantle. In this study, we systematically investigate Mo isotopes in a suite of well‐characterized continental basalts from Keluo and Halaha‐Chaoer, located in Northeast China. The δ98Mo values of Keluo range from −0.41 to −0.23‰, with an average of −0.34‰, while Halaha‐Chaoer samples ranged from −0.18 to −0.12‰, with an average of −0.15‰. The δ98Mo values of Keluo basalts are lighter than the mean value of fresh oceanic basalts (−0.21‰), whereas those of Halaha‐Chaoer basalts are similar to oceanic basalts. Combined with other geochemical indications (LOI, Ce/Pb, La/Yb and so on), the Mo isotopic variations cannot be attributed to chemical weathering, continental crust contamination or magmatic processes. Instead, the δ98Mo variations in this study are explained by the incorporation of different oceanic crustal materials into the magma sources. Correlations of δ98Mo with Ba/Th, Th/U, 143Nd/144Nd indicated that both sediment and altered oceanic crust have significantly influenced these variations. This study demonstrates the potential of Mo isotopes to distinguish different types of recycled oceanic crust materials.
{"title":"Tracing subducted oceanic slabs in the mantle by using molybdenum isotopes: A case study of intraplate basalts from Northeast China","authors":"Qifang Zheng, Xiuhe Gao, Zhenyu Fan, Guangyu He, Qian Wang, Jane Fitton, Daoqing Zhou","doi":"10.1002/gj.5030","DOIUrl":"https://doi.org/10.1002/gj.5030","url":null,"abstract":"Determining subduction‐related processes is crucial for understanding lithological heterogeneity, as substantial quantities of slabs are recycled into the mantle. Molybdenum isotopes are valuable for distinguishing sources materials due to the significant isotope differences between the crust and the mantle. In this study, we systematically investigate Mo isotopes in a suite of well‐characterized continental basalts from Keluo and Halaha‐Chaoer, located in Northeast China. The δ<jats:sup>98</jats:sup>Mo values of Keluo range from −0.41 to −0.23‰, with an average of −0.34‰, while Halaha‐Chaoer samples ranged from −0.18 to −0.12‰, with an average of −0.15‰. The δ<jats:sup>98</jats:sup>Mo values of Keluo basalts are lighter than the mean value of fresh oceanic basalts (−0.21‰), whereas those of Halaha‐Chaoer basalts are similar to oceanic basalts. Combined with other geochemical indications (LOI, Ce/Pb, La/Yb and so on), the Mo isotopic variations cannot be attributed to chemical weathering, continental crust contamination or magmatic processes. Instead, the δ<jats:sup>98</jats:sup>Mo variations in this study are explained by the incorporation of different oceanic crustal materials into the magma sources. Correlations of δ<jats:sup>98</jats:sup>Mo with Ba/Th, Th/U, <jats:sup>143</jats:sup>Nd/<jats:sup>144</jats:sup>Nd indicated that both sediment and altered oceanic crust have significantly influenced these variations. This study demonstrates the potential of Mo isotopes to distinguish different types of recycled oceanic crust materials.","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yukun Qi, Jiaopeng Sun, Yunpeng Dong, Weidong He, Zonglin Li, Lei He, Kai Ye, Zhigang Wang, Junxiang Zhang, Teng Wang
The Erlangping back‐arc Basin separated the North Qinling Arc Terrane (NQAT) from the North China Block during Cambrian‐Ordovician. An enhanced knowledge on its evolutionary history would greatly improve our understanding on tectonic evolution of the Proto‐Tethys Ocean. In this study, we undertook sandstone petrologic and detrital zircon U–Pb geochronologic investigations on the Erlangping Group around the Tianshui Area. The Erlangping Group meta‐sedimentary rocks yielded two general types of zircon U–Pb age patterns. The first type is composed mostly of Neoproterozoic ages with a major age peak at ca. 900 Ma and has a youngest age population peaking at ca. 440 Ma. The second type is dominated by ca. 500–400 Ma components with a youngest age peak of ca. 380 Ma. The two contrasting age patterns and youngest peak ages, along with known ages of volcanic interbeds and intruded granites, allow us to subdivide the Erlangping Group to a Silurian unit and a Devonian unit, which are both stratigraphic higher than the Cambrian‐Ordovician ophiolitic unit of the Erlangping Group. In comparison with age spectra of coeval sediments in the nearby tectonic units, we found that sources of the Erlangping Group were from the Neoproterozoic NQAT basement rocks and associated Early Palaeozoic volcanic and plutonic rocks. The increasing numbers of younger zircons hint at a significant structural unroofing of the NQAT at the Silurian‐Devonian transition before having been subjected to greenschist‐facies metamorphism in the Devonian in response to the elimination of the Shangdan Ocean.
{"title":"Depositional Age and Provenance of the Erlangping Group in the Tianshui Area: Implication for Early Palaeozoic Evolution of the Erlangping Back‐Arc Basin","authors":"Yukun Qi, Jiaopeng Sun, Yunpeng Dong, Weidong He, Zonglin Li, Lei He, Kai Ye, Zhigang Wang, Junxiang Zhang, Teng Wang","doi":"10.1002/gj.5051","DOIUrl":"https://doi.org/10.1002/gj.5051","url":null,"abstract":"The Erlangping back‐arc Basin separated the North Qinling Arc Terrane (NQAT) from the North China Block during Cambrian‐Ordovician. An enhanced knowledge on its evolutionary history would greatly improve our understanding on tectonic evolution of the Proto‐Tethys Ocean. In this study, we undertook sandstone petrologic and detrital zircon U–Pb geochronologic investigations on the Erlangping Group around the Tianshui Area. The Erlangping Group meta‐sedimentary rocks yielded two general types of zircon U–Pb age patterns. The first type is composed mostly of Neoproterozoic ages with a major age peak at ca. 900 Ma and has a youngest age population peaking at ca. 440 Ma. The second type is dominated by ca. 500–400 Ma components with a youngest age peak of ca. 380 Ma. The two contrasting age patterns and youngest peak ages, along with known ages of volcanic interbeds and intruded granites, allow us to subdivide the Erlangping Group to a Silurian unit and a Devonian unit, which are both stratigraphic higher than the Cambrian‐Ordovician ophiolitic unit of the Erlangping Group. In comparison with age spectra of coeval sediments in the nearby tectonic units, we found that sources of the Erlangping Group were from the Neoproterozoic NQAT basement rocks and associated Early Palaeozoic volcanic and plutonic rocks. The increasing numbers of younger zircons hint at a significant structural unroofing of the NQAT at the Silurian‐Devonian transition before having been subjected to greenschist‐facies metamorphism in the Devonian in response to the elimination of the Shangdan Ocean.","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Magdalena Radulescu, Abdulkadir Barut, Kamel Si Mohammed, Abdelmohsen A. Nassani, Ibrahim Cutcu
This study investigates the dynamic effect of resource productivity and green technologies on renewable energy (RE) use in 28 middle‐income countries from 2006 to 2022 using MMQR, QR and causality techniques. Results suggested that green technology innovation substantially influences RE use. Second, the significant positive coefficients show that resource productivity leads to higher RE consumption at the upper quantile due to decoupling Gross Domestic Product (GDP) growth from extracting natural resources, indicating a transition towards more sustainable and efficient practices. Based on the empirical findings, several policy implications are suggested for middle‐income economies.
{"title":"Insights of resources productivity and green technologies impact on renewable energy consumption: Novel MMQR approach","authors":"Magdalena Radulescu, Abdulkadir Barut, Kamel Si Mohammed, Abdelmohsen A. Nassani, Ibrahim Cutcu","doi":"10.1002/gj.5044","DOIUrl":"https://doi.org/10.1002/gj.5044","url":null,"abstract":"This study investigates the dynamic effect of resource productivity and green technologies on renewable energy (RE) use in 28 middle‐income countries from 2006 to 2022 using MMQR, QR and causality techniques. Results suggested that green technology innovation substantially influences RE use. Second, the significant positive coefficients show that resource productivity leads to higher RE consumption at the upper quantile due to decoupling Gross Domestic Product (GDP) growth from extracting natural resources, indicating a transition towards more sustainable and efficient practices. Based on the empirical findings, several policy implications are suggested for middle‐income economies.","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Wei He, Kai Hu, Jian Cao, Suping Yao, Chao Zhang, Bei Wang, Guobin Niu
Differences in the pore and fracture systems of four marcolithotypes (bright,semi‐bright, semi‐dull and dull) in coal reservoirs affect the quality of coalbed methane (CBM) and constrain exploration and development of CBM. In this paper, vitrinite reflectance (RO), maceral composition, proximate analysis, scanning electron microscopy (SEM), mercury intrusion porosimetry (MIP), low‐field nuclear magnetic resonance (NMR) and high‐pressure isothermal adsorption experiments and the mathematical method of fractal dimension were carried out on high‐rank coal samples of different marcolithotypes from the Weizhou mining area in the western margin of Ordos Basin. The results show that from bright coal to dull coal, the RO and vitrinite content gradually decrease, while the mineral content and Aad gradually increase. SEM images show that the bright and semi‐bright coals develop open fractures, whereas semi‐dull and dull coals develop closed fractures. According to pore size distribution established by MIP and NMR, the proportion of seepage pores gradually increased from bright coal to dull coal, and MIP fractal dimension of seepage pores (DM2; 2.3352, 2.3532, 2.3755 and 2.4727, respectively) and NMR fractal dimension of seepage pores (DN2; 2.8767, 2.9142, 2.9297 and 2.9981, respectively) show that the structure of the seepage pore is progressively more complex from bright coal to dull coal. In addition, percentage of NMR adsorption pores progressively increases from bright coal to dull coal (64.96%, 76.64%, 82.04% and 89.67%, respectively), but total porosity of bright coal (6.74%) is much greater than that of dull coal (1.34%), which results in that bright coal also has the strongest CH4 adsorption capability (Langmuir volume is 22.898 cm3/g).
{"title":"Pore structure and adsorption capability of marcolithotypes in the Weizhou mining area, western margin of Ordos Basin","authors":"Wei He, Kai Hu, Jian Cao, Suping Yao, Chao Zhang, Bei Wang, Guobin Niu","doi":"10.1002/gj.5031","DOIUrl":"https://doi.org/10.1002/gj.5031","url":null,"abstract":"Differences in the pore and fracture systems of four marcolithotypes (bright,semi‐bright, semi‐dull and dull) in coal reservoirs affect the quality of coalbed methane (CBM) and constrain exploration and development of CBM. In this paper, vitrinite reflectance (<jats:italic>R</jats:italic><jats:sub>O</jats:sub>), maceral composition, proximate analysis, scanning electron microscopy (SEM), mercury intrusion porosimetry (MIP), low‐field nuclear magnetic resonance (NMR) and high‐pressure isothermal adsorption experiments and the mathematical method of fractal dimension were carried out on high‐rank coal samples of different marcolithotypes from the Weizhou mining area in the western margin of Ordos Basin. The results show that from bright coal to dull coal, the <jats:italic>R</jats:italic><jats:sub>O</jats:sub> and vitrinite content gradually decrease, while the mineral content and <jats:italic>A</jats:italic><jats:sub>ad</jats:sub> gradually increase. SEM images show that the bright and semi‐bright coals develop open fractures, whereas semi‐dull and dull coals develop closed fractures. According to pore size distribution established by MIP and NMR, the proportion of seepage pores gradually increased from bright coal to dull coal, and MIP fractal dimension of seepage pores (<jats:italic>D</jats:italic><jats:sub>M2</jats:sub>; 2.3352, 2.3532, 2.3755 and 2.4727, respectively) and NMR fractal dimension of seepage pores (<jats:italic>D</jats:italic><jats:sub>N2</jats:sub>; 2.8767, 2.9142, 2.9297 and 2.9981, respectively) show that the structure of the seepage pore is progressively more complex from bright coal to dull coal. In addition, percentage of NMR adsorption pores progressively increases from bright coal to dull coal (64.96%, 76.64%, 82.04% and 89.67%, respectively), but total porosity of bright coal (6.74%) is much greater than that of dull coal (1.34%), which results in that bright coal also has the strongest CH<jats:sub>4</jats:sub> adsorption capability (Langmuir volume is 22.898 cm<jats:sup>3</jats:sup>/g).","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Xin Zhao, Guoqing Zhai, Xiaowei Ma, Kamel Si Mohammed, Yuriy Bilan, Abdelmohsen A. Nassani
The present study explores the impact of energy natural resource productivity and environmental tax on environmental sustainability in six major CO2‐emitting economies: the Euro Area, China, South Korea, Japan, the United Kingdom and the United States, from 1997 to 2019. This analysis aims to reveal novel findings and implications for different energy natural resource productivity types and environmental regulations. We employed data regarding leading national and regional CO2 emitters from 1997 to 2020 to conduct an empirical analysis using the panel non‐linear auto‐regressive distributed lag (NARDL) and panel quantile ARDL (QARDL) methods. The results show that energy natural resource productivity and environmental tax are crucial components in reducing CO2 emissions by controlling for innovation technology and renewable energy consumption. The main findings demonstrate that the impact is stronger in the presence of increased energy natural resource productivity and vice versa. These findings have novel implications for sustainable development and carbon neutrality.
{"title":"Role of energy natural resource productivity and environmental taxation in controlling environmental pollution: Policy‐based analysis for regions","authors":"Xin Zhao, Guoqing Zhai, Xiaowei Ma, Kamel Si Mohammed, Yuriy Bilan, Abdelmohsen A. Nassani","doi":"10.1002/gj.5047","DOIUrl":"https://doi.org/10.1002/gj.5047","url":null,"abstract":"The present study explores the impact of energy natural resource productivity and environmental tax on environmental sustainability in six major CO<jats:sub>2</jats:sub>‐emitting economies: the Euro Area, China, South Korea, Japan, the United Kingdom and the United States, from 1997 to 2019. This analysis aims to reveal novel findings and implications for different energy natural resource productivity types and environmental regulations. We employed data regarding leading national and regional CO<jats:sub>2</jats:sub> emitters from 1997 to 2020 to conduct an empirical analysis using the panel non‐linear auto‐regressive distributed lag (NARDL) and panel quantile ARDL (QARDL) methods. The results show that energy natural resource productivity and environmental tax are crucial components in reducing CO<jats:sub>2</jats:sub> emissions by controlling for innovation technology and renewable energy consumption. The main findings demonstrate that the impact is stronger in the presence of increased energy natural resource productivity and vice versa. These findings have novel implications for sustainable development and carbon neutrality.","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Debarati Nag, Satish J. Sangode, Sarvendra P. Singh, Prem R. Uddandam, Adrita Choudhuri, Binita Phartiyal, Vandana Prasad
A combination of magnetic polarity and rock magnetic analysis on the well‐documented section of the Um Sohryngkew River (USR) in the south Shillong Plateau, NE India, produced a sharp reversal marking the C29r‐C29n geomagnetic polarity transition at approximately 65.688 Ma. The rock magnetic studies indicate ferrimagnetic dominant mineralogy with abundance of SSD grains, with an anomalous peak in susceptibility coinciding with Ir‐rich limonitic layer. The magnetic reversal occurs precisely 61 m above the Ir‐rich distinct in situ limonitic layer, indicating that the C29r‐C29n geomagnetic reversal post‐dates the widely accepted Ir‐anomaly based K‐Pg boundary by approximately 355 Ka. Furthermore, the rock magnetic studies indicate its frequency dependence coinciding with the Ir‐rich limonitic layer suggesting a possible dust/aerosol source, while akaganéite is reported from the interval approximately 1 m below peak susceptibility, indicating signature of Deccan volcanism. This study infers the completeness of the USR section with a high rate of sedimentation of approximately 17 cm/ka among the marine K‐Pg boundary sections in the world.
在印度东北部锡隆高原南部的乌姆苏林圭河(USR)有据可查的地段上,结合磁极性和岩石磁性分析,发现了一个急剧的反转,标志着大约在 65.688 Ma 处的 C29r-C29n 地磁极性转换。岩石磁性研究表明,铁磁性矿物学占主导地位,富含 SSD 晶粒,与富含 Ir 的褐铁矿层相吻合的电感异常峰值。磁性反转恰好发生在富含Ir的独特原位褐铁矿层上方61米处,这表明C29r-C29n地磁反转比广泛接受的基于Ir异常的K-Pg边界晚了约355Ka。此外,岩石磁性研究表明,其频率依赖性与富含Ir的褐铁矿层相吻合,这表明可能存在尘埃/气溶胶来源,而据报告,在低于峰值磁感应强度约1米的区间存在阿卡冈奈石,这表明德干火山活动的特征。这项研究推断了 USR 断面的完整性,其沉积速率在全球海洋 K-Pg 边界断面中约为 17 厘米/千卡。
{"title":"Magnetostratigraphy and rock magnetic studies on the Cretaceous‐Paleogene transition strata along the Um Sohryngkew River, Therriaghat, Meghalaya, India","authors":"Debarati Nag, Satish J. Sangode, Sarvendra P. Singh, Prem R. Uddandam, Adrita Choudhuri, Binita Phartiyal, Vandana Prasad","doi":"10.1002/gj.5046","DOIUrl":"https://doi.org/10.1002/gj.5046","url":null,"abstract":"A combination of magnetic polarity and rock magnetic analysis on the well‐documented section of the Um Sohryngkew River (USR) in the south Shillong Plateau, NE India, produced a sharp reversal marking the C29r‐C29n geomagnetic polarity transition at approximately 65.688 Ma. The rock magnetic studies indicate ferrimagnetic dominant mineralogy with abundance of SSD grains, with an anomalous peak in susceptibility coinciding with Ir‐rich limonitic layer. The magnetic reversal occurs precisely 61 m above the Ir‐rich distinct in situ limonitic layer, indicating that the C29r‐C29n geomagnetic reversal post‐dates the widely accepted Ir‐anomaly based K‐Pg boundary by approximately 355 Ka. Furthermore, the rock magnetic studies indicate its frequency dependence coinciding with the Ir‐rich limonitic layer suggesting a possible dust/aerosol source, while akaganéite is reported from the interval approximately 1 m below peak susceptibility, indicating signature of Deccan volcanism. This study infers the completeness of the USR section with a high rate of sedimentation of approximately 17 cm/ka among the marine K‐Pg boundary sections in the world.","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Kailun Ba, Haimeng Xue, Lin Liu, Jianping Huang, Junhao Qu
The Shandong Peninsula is located in the eastern part of the North China Craton (NCC). Influenced by the collision between the North and South China blocks and the subduction of the Pacific Plate, the tectonic evolution process is highly complex. Previous studies have proposed that the thick cratonic root beneath the eastern NCC has been destructed. To better understand the relationship between the craton reactivation and the deep subduction, more constraints on the topography variations of the mantle transition zone (MTZ) discontinuities are required. In this study, we stacked 9073 P‐to‐S receiver functions calculated from 129 broadband seismic stations to image the depth variations of the MTZ discontinuities beneath the Shandong Peninsula and its adjacent area. To decrease the influence of velocity anomaly above the MTZ discontinuities, we converted the apparent depths into corrected depth using regional and global 3D velocity models. The apparent depth of the 410‐km discontinuity exhibits a depression of approximately 6 km, which normalizes after velocity correction. This implies the existence of the low‐velocity anomaly in the upper mantle, possibly caused by slab dehydration and water infiltration into the upper mantle. The significant depression of the 660‐km discontinuity indicated the presence of the cold Pacific slab stagnating at the base of the MTZ. The gradual westward depression of the 660‐km discontinuity by 50 km could provide evidence for the sinking of the western margin of the flat‐lying subducting Pacific slab in the MTZ beneath the Shandong Peninsula.
{"title":"Mantle dynamics of the stagnating slab: A case study of Shandong Peninsula and adjacent areas","authors":"Kailun Ba, Haimeng Xue, Lin Liu, Jianping Huang, Junhao Qu","doi":"10.1002/gj.5045","DOIUrl":"https://doi.org/10.1002/gj.5045","url":null,"abstract":"The Shandong Peninsula is located in the eastern part of the North China Craton (NCC). Influenced by the collision between the North and South China blocks and the subduction of the Pacific Plate, the tectonic evolution process is highly complex. Previous studies have proposed that the thick cratonic root beneath the eastern NCC has been destructed. To better understand the relationship between the craton reactivation and the deep subduction, more constraints on the topography variations of the mantle transition zone (MTZ) discontinuities are required. In this study, we stacked 9073 P‐to‐S receiver functions calculated from 129 broadband seismic stations to image the depth variations of the MTZ discontinuities beneath the Shandong Peninsula and its adjacent area. To decrease the influence of velocity anomaly above the MTZ discontinuities, we converted the apparent depths into corrected depth using regional and global 3D velocity models. The apparent depth of the 410‐km discontinuity exhibits a depression of approximately 6 km, which normalizes after velocity correction. This implies the existence of the low‐velocity anomaly in the upper mantle, possibly caused by slab dehydration and water infiltration into the upper mantle. The significant depression of the 660‐km discontinuity indicated the presence of the cold Pacific slab stagnating at the base of the MTZ. The gradual westward depression of the 660‐km discontinuity by 50 km could provide evidence for the sinking of the western margin of the flat‐lying subducting Pacific slab in the MTZ beneath the Shandong Peninsula.","PeriodicalId":12784,"journal":{"name":"Geological Journal","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142215382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}