Cai-yuan Dong , Liang Zhang , Wei Yang , Zhen-ping Xu , Jun Li , Wei-dong Miao
The Jurassic tight sandstone oil and gas exploration and development in the eastern Yangxia Sag is a new field. To elucidate the origin, accumulation process and potential of tight oil and gas, the authors have conducted comprehensive analyses employing methodologies encompassing source rocks, oil geochemistry, and fluid inclusions. The results show that the abundance of organic matter of Jurassic source rocks is high, and the type of organic matter is of II-III and in mature evolution stage. The main source rocks of oil and gas are Huangshanjie Formation and Jurassic coal-bearing source rocks. Ahe Formation developed two stages of hydrocarbon charging, and the period is later than the reservoir densification time. Yangxia Formation oil charged before the reservoir densified, and the late gas charged after the reservoir densified. Hydrocarbon generation intensity of Jurassic source rocks has reached the basic conditions for the formation of tight gas reservoirs. Controlled by the difference of source rocks distribution and accumulation process, tight sandstone oil and gas accumulation conditions are better in the depression direction than in the southeast margin area. This study is of practical importance for expanding the exploration field and selecting favorable areas in the eastern Yangxia sag.
{"title":"Accumulation process and potential of Jurassic tight sandstone oil and gas in Eastern Yangxia sag of Kuqa Depression","authors":"Cai-yuan Dong , Liang Zhang , Wei Yang , Zhen-ping Xu , Jun Li , Wei-dong Miao","doi":"10.31035/cg2023063","DOIUrl":"10.31035/cg2023063","url":null,"abstract":"<div><div>The Jurassic tight sandstone oil and gas exploration and development in the eastern Yangxia Sag is a new field. To elucidate the origin, accumulation process and potential of tight oil and gas, the authors have conducted comprehensive analyses employing methodologies encompassing source rocks, oil geochemistry, and fluid inclusions. The results show that the abundance of organic matter of Jurassic source rocks is high, and the type of organic matter is of II-III and in mature evolution stage. The main source rocks of oil and gas are Huangshanjie Formation and Jurassic coal-bearing source rocks. Ahe Formation developed two stages of hydrocarbon charging, and the period is later than the reservoir densification time. Yangxia Formation oil charged before the reservoir densified, and the late gas charged after the reservoir densified. Hydrocarbon generation intensity of Jurassic source rocks has reached the basic conditions for the formation of tight gas reservoirs. Controlled by the difference of source rocks distribution and accumulation process, tight sandstone oil and gas accumulation conditions are better in the depression direction than in the southeast margin area. This study is of practical importance for expanding the exploration field and selecting favorable areas in the eastern Yangxia sag.</div></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"8 2","pages":"Pages 389-407"},"PeriodicalIF":4.6,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Hong-yun Ma , Jiang Liu , Hong-na Ma , Hua-qi Wang , Cheng-zhu Li , Yan-e Li
Addressing global warming, a common change today, requires achieving peak carbon dioxide emissions and carbon neutrality (also referred to as the dual carbon goals). Enhancing research on the carbon cycle is urgently needed as the foundation. Water, a key carrier in the carbon cycle, necessitates investigation into groundwater carbon pools’ contribution to atmospheric carbon sinks. This study assessed carbon stocks in the Yinchuan Basin's soil and groundwater carbon pools. Findings indicate the basin's surface soils contain approximately 24.16 Tg of organic carbon and a total of 60.01 Tg of carbon. In contrast, the basin’ s groundwater holds around 4.90 Tg of carbon, roughly one-fifth of the organic carbon in surface soils. Thus, groundwater and soil carbon pools possess comparable carbon stocks, underscoring the importance of the groundwater carbon pool. Studies on terrestrial carbon balance should incorporate groundwater carbon pools, which deserve increased focus. Evaluating groundwater carbon pools’ contributions is vital for achieving the dual carbon goals.
{"title":"Contribution of groundwater carbon pools to atmospheric carbon sinks: A case study of the Yinchuan Basin, Northwest China","authors":"Hong-yun Ma , Jiang Liu , Hong-na Ma , Hua-qi Wang , Cheng-zhu Li , Yan-e Li","doi":"10.31035/cg20230102","DOIUrl":"10.31035/cg20230102","url":null,"abstract":"<div><div>Addressing global warming, a common change today, requires achieving peak carbon dioxide emissions and carbon neutrality (also referred to as the dual carbon goals). Enhancing research on the carbon cycle is urgently needed as the foundation. Water, a key carrier in the carbon cycle, necessitates investigation into groundwater carbon pools’ contribution to atmospheric carbon sinks. This study assessed carbon stocks in the Yinchuan Basin's soil and groundwater carbon pools. Findings indicate the basin's surface soils contain approximately 24.16 Tg of organic carbon and a total of 60.01 Tg of carbon. In contrast, the basin’ s groundwater holds around 4.90 Tg of carbon, roughly one-fifth of the organic carbon in surface soils. Thus, groundwater and soil carbon pools possess comparable carbon stocks, underscoring the importance of the groundwater carbon pool. Studies on terrestrial carbon balance should incorporate groundwater carbon pools, which deserve increased focus. Evaluating groundwater carbon pools’ contributions is vital for achieving the dual carbon goals.</div></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"8 2","pages":"Pages 295-302"},"PeriodicalIF":4.6,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-25DOI: 10.1016/S2096-5192(25)00084-9
{"title":"Editorial Committee of China Geology","authors":"","doi":"10.1016/S2096-5192(25)00084-9","DOIUrl":"10.1016/S2096-5192(25)00084-9","url":null,"abstract":"","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"8 2","pages":"Pages 465-468"},"PeriodicalIF":4.6,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Discovery of Late Triassic (217 Ma) gabbro in the Yabulai District: Constraints on the Early Mesozoic evolution of the Alxa Block","authors":"Peng-fei Niu , Jun-feng Qu , Jin Zhang , Heng Zhao , Bei-hang Zhang","doi":"10.31035/cg2023128","DOIUrl":"10.31035/cg2023128","url":null,"abstract":"","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"8 2","pages":"Pages 460-462"},"PeriodicalIF":4.6,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144178753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shu-yu Wu , Jun Liu , Jian-wen Chen , Qi-liang Sun , Yin-guo Zhang , Jie Liang , Yong-cai Feng
Mesozoic-Palaeozoic marine carbonate rocks are crucial hydrocarbon reservoirs in the Central Uplift area of the South Yellow Sea Basin (SYSB). Due to the scarcity of boreholes and the significant heterogeneity of carbonate reservoirs, the distribution of porous carbonate reservoirs and their related key controlling factors remain unclear. In this study, factors affecting the distribution of porous Carboniferous-Early Permian carbonate reservoirs in the SYSB were investigated through seismic inversion and isotope analysis. The log-seismic characteristics of porous carbonate reservoirs, sensitive lithology parameters, and physical property parameters were extracted and analyzed. The pre-stack simultaneous inversion technique was applied to predict the lithology and physical properties of porous carbonate reservoirs. Moreover, the sedimentary of carbonate was analyzed using isotopes of carbon, oxygen, and strontium. The results show that porous carbonate reservoirs are mainly developed in the open platform sediments with porosities of 3%–5% and are mainly distributed in the paleo-highland (Huanglong Formation and Chuanshan Formation) and the slope of paleo-highland (Hezhou Formation). The porous carbonate reservoirs of the Qixia Formation are only locally developed. In addition, the negative δ13C excursions indicate a warm and humid tropical climate with three sea-level fluctuations in the study area from the Carboniferous to Early Permian. The favorable conditions for developing porous carbonate rocks include the sedimentary environment and diagenetic process. The primary pore tends to form in high-energy environments of the paleo-highland, and the secondary pore is increased by dissolution during the syngenetic or quasi-syngenetic period. According to the hydrocarbon potential analysis, the Late Ordovician Wufeng Formation and Lower Silurian Gaojiabian Formation are the source rocks in the high-maturity-over-maturity stage, the Carboniferous-Lower Permian carbonate is the good reservoirs, and the Late Permian Longtan-Dalong Formation is the stable seal, ensuring a huge hydrocarbon accumulation potential in SYSB. The methods proposed in this study can be applied to other carbonate-dominated strata worldwide.
{"title":"Carboniferous-Early Permian heterogeneous distribution of porous carbonate reservoirs in the Central Uplift of the South Yellow Sea Basin and its hydrocarbon potential analysis","authors":"Shu-yu Wu , Jun Liu , Jian-wen Chen , Qi-liang Sun , Yin-guo Zhang , Jie Liang , Yong-cai Feng","doi":"10.31035/cg2023059","DOIUrl":"10.31035/cg2023059","url":null,"abstract":"<div><div>Mesozoic-Palaeozoic marine carbonate rocks are crucial hydrocarbon reservoirs in the Central Uplift area of the South Yellow Sea Basin (SYSB). Due to the scarcity of boreholes and the significant heterogeneity of carbonate reservoirs, the distribution of porous carbonate reservoirs and their related key controlling factors remain unclear. In this study, factors affecting the distribution of porous Carboniferous-Early Permian carbonate reservoirs in the SYSB were investigated through seismic inversion and isotope analysis. The log-seismic characteristics of porous carbonate reservoirs, sensitive lithology parameters, and physical property parameters were extracted and analyzed. The pre-stack simultaneous inversion technique was applied to predict the lithology and physical properties of porous carbonate reservoirs. Moreover, the sedimentary of carbonate was analyzed using isotopes of carbon, oxygen, and strontium. The results show that porous carbonate reservoirs are mainly developed in the open platform sediments with porosities of 3%–5% and are mainly distributed in the paleo-highland (Huanglong Formation and Chuanshan Formation) and the slope of paleo-highland (Hezhou Formation). The porous carbonate reservoirs of the Qixia Formation are only locally developed. In addition, the negative <em>δ</em><sup>13</sup>C excursions indicate a warm and humid tropical climate with three sea-level fluctuations in the study area from the Carboniferous to Early Permian. The favorable conditions for developing porous carbonate rocks include the sedimentary environment and diagenetic process. The primary pore tends to form in high-energy environments of the paleo-highland, and the secondary pore is increased by dissolution during the syngenetic or quasi-syngenetic period. According to the hydrocarbon potential analysis, the Late Ordovician Wufeng Formation and Lower Silurian Gaojiabian Formation are the source rocks in the high-maturity-over-maturity stage, the Carboniferous-Lower Permian carbonate is the good reservoirs, and the Late Permian Longtan-Dalong Formation is the stable seal, ensuring a huge hydrocarbon accumulation potential in SYSB. The methods proposed in this study can be applied to other carbonate-dominated strata worldwide.</div></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"8 1","pages":"Pages 58-76"},"PeriodicalIF":4.6,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Texas is the largest state by area in the US after Alaska, and one of the top states in the production and consumption of electricity with many coal-fired plants. Coal-fired power plants emit greater than 70% of pollutants in the energy sector. When coal is burned to produce electricity, nitrogen oxides (NOx) are released into the air, one of the main pollutants that threaten human health and lead to a large number of premature deaths. The key to effective air quality management is the strict compliance of all plants with emission standards. However, not all Texas coal plants have the environmental equipment to lower pollutant emissions. Nitrogen dioxide (NO2) observations from the TROPOspheric Monitoring Instrument (TROPOMI) were used to evaluate the emissions for Texas power plants. Data from both the Emissions and Generation Resource Integrated Database (EGRID) and the Emissions Database for Global Atmospheric Research (EDGAR) were used to examine emissions. It was found that NOx emissions for Texas power plants range from 1.53 kt/year to 10.99 kt/year, with the Martin Lake, Limestone and Fayette Power Project stations being the top emitters. WA Parish and Martin Lake stations have the strongest NOx fluxes, with both exhibiting significant seasonal variability. Comparisons of bottom-up inventories for EDGAR and EGRID show a high correlation (r=0.956) and a low root mean square error (0.766). A more reasonable control policy would lead to much reduced NOx emissions.
{"title":"Investigation of a NOx emission from coal power plants in Texas, United States and its impact on the environment","authors":"Mikalai Filonchyk , Michael P. Peterson","doi":"10.31035/cg20230093","DOIUrl":"10.31035/cg20230093","url":null,"abstract":"<div><div>Texas is the largest state by area in the US after Alaska, and one of the top states in the production and consumption of electricity with many coal-fired plants. Coal-fired power plants emit greater than 70% of pollutants in the energy sector. When coal is burned to produce electricity, nitrogen oxides (NO<sub>x</sub>) are released into the air, one of the main pollutants that threaten human health and lead to a large number of premature deaths. The key to effective air quality management is the strict compliance of all plants with emission standards. However, not all Texas coal plants have the environmental equipment to lower pollutant emissions. Nitrogen dioxide (NO<sub>2</sub>) observations from the TROPOspheric Monitoring Instrument (TROPOMI) were used to evaluate the emissions for Texas power plants. Data from both the Emissions and Generation Resource Integrated Database (EGRID) and the Emissions Database for Global Atmospheric Research (EDGAR) were used to examine emissions. It was found that NO<sub>x</sub> emissions for Texas power plants range from 1.53 kt/year to 10.99 kt/year, with the Martin Lake, Limestone and Fayette Power Project stations being the top emitters. WA Parish and Martin Lake stations have the strongest NO<sub>x</sub> fluxes, with both exhibiting significant seasonal variability. Comparisons of bottom-up inventories for EDGAR and EGRID show a high correlation (<em>r</em>=0.956) and a low root mean square error (0.766). A more reasonable control policy would lead to much reduced NO<sub>x</sub> emissions.</div></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"8 1","pages":"Pages 107-116"},"PeriodicalIF":4.6,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143155651","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Dian-he Liu , Cheng-lin Liu , Chun-lian Wang , Xiao-can Yu
In response to the rise of the energy storage industries such as new energy vehicles and the wide application of lithium in various fields worldwide, the global demand for lithium resources has been in explosive growth. In order to further comprehensively understand the global supply and demand pattern, development and utilization status, genesis of ore deposits and other characteristics of lithium resources, based on the achievements of many researchers at home and abroad, this paper systematically summarized the lithium supply and demand situation, resource endowment, deposit classification and distribution, typical geological characteristics, metallogenic factors and metallogenic regularity of terrestrial brine-type lithium deposits which are the main types of development and utilization all over the world. The review shows that brine-type lithium resource and (or) reserves in the plateau salt lakes are huge and play an important role. In addition, the mineralization potential of the underground brine-type lithium deposit is broad worldwide. The potential resources of underground brines are enormous, and the geothermal spring water type is also worthy of attention. Brine lithium deposits are mainly controlled by the subduction and collision of regional plate tectonics, arid climate and provenance conditions. Strengthening of the scientific research on underground brines in the future is expected to provide another significant support for the global demand for lithium resources.
{"title":"Distribution, characteristics, metallogenic processes and prospecting potential of terrestrial brine-type lithium deposits in the world and lithium demand situation","authors":"Dian-he Liu , Cheng-lin Liu , Chun-lian Wang , Xiao-can Yu","doi":"10.31035/cg20230128","DOIUrl":"10.31035/cg20230128","url":null,"abstract":"<div><div>In response to the rise of the energy storage industries such as new energy vehicles and the wide application of lithium in various fields worldwide, the global demand for lithium resources has been in explosive growth. In order to further comprehensively understand the global supply and demand pattern, development and utilization status, genesis of ore deposits and other characteristics of lithium resources, based on the achievements of many researchers at home and abroad, this paper systematically summarized the lithium supply and demand situation, resource endowment, deposit classification and distribution, typical geological characteristics, metallogenic factors and metallogenic regularity of terrestrial brine-type lithium deposits which are the main types of development and utilization all over the world. The review shows that brine-type lithium resource and (or) reserves in the plateau salt lakes are huge and play an important role. In addition, the mineralization potential of the underground brine-type lithium deposit is broad worldwide. The potential resources of underground brines are enormous, and the geothermal spring water type is also worthy of attention. Brine lithium deposits are mainly controlled by the subduction and collision of regional plate tectonics, arid climate and provenance conditions. Strengthening of the scientific research on underground brines in the future is expected to provide another significant support for the global demand for lithium resources.</div></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"8 1","pages":"Pages 1-25"},"PeriodicalIF":4.6,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143155634","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Poulami Roy, Bapi Goswami, Ankita Basak, Anwesa Sen, Chittaranjan Bhattacharyya
Distinguishing high-grade mafic-ultramafic rocks originally crystallized from within-plate basaltic magmatism is challenging and crucial because the chemical composition of the igneous rocks has been modified during high-grade metamorphism, causing misidentification of the characters of the parental magma. Proterozoic metamorphosed mafic dykes occur throughout the Chhotanagpur Gneissic Complex (CGC) of eastern Indian shield. The E-W trending mafic dykes from the Saltora area in the southeastern CGC underwent metamorphism in two episodes: M1 (650 MPa; 770°C) and M2 (300 MPa; 744°C). The metamafics are enriched in LILE, depleted in HFSE, and display strong fractionation of LREE, nearly flat HREE patterns in a chondrite-normalized REE diagram, and show tholeiitic differentiation trend. Their geochemical affinity is towards rift-related, continental within-plate basalts. About 7%–10% melting of the carbonated spinel-peridotite sub-continental lithospheric mantle (SCLM) produced the parental mafic magma. The pre-existing SCLM was metasomatized by slab-derived fluid during the previous subduction. The upwelling of the asthenosphere in a post-collisional tectonic setting caused E-W trending fractures, lithospheric thinning, and gravitational collapse. These dykes were emplaced during crustal extension around 1070 Ma. The remarkable geochemical similarity between the mafic dykes of Saltora and Dhanbad, the ca. 1096 Ma Mahoba (Bundelkhand craton), and the ca. 1070 Ma Alcurra mafic dykes in Australia supports a genetic link.
区分最初结晶的高品位镁铁质-超镁铁质岩石与板块内玄武岩岩浆活动是具有挑战性和关键的，因为在高品位变质作用期间，火成岩的化学成分发生了改变，导致母岩浆特征的错误识别。元古代变质基性岩脉分布于东印度盾的Chhotanagpur片麻岩杂岩（CGC）中。鄂尔多斯盆地东南部Saltora地区东西向基性岩脉经历了2期变质作用：M1期（650 MPa）；770°C)和M2 (300 MPa；744°C)。变质岩中LILE富集，HFSE贫，LREE分馏作用强，球粒陨石归一化稀土图显示近平型，并呈拉斑分异趋势。它们的地球化学亲缘关系是与裂谷有关的大陆板内玄武岩。约7%-10%的碳酸尖晶石-橄榄岩次大陆岩石圈地幔（SCLM）熔融产生母基性岩浆。先前存在的SCLM在之前的俯冲过程中被板块衍生流体交代。碰撞后构造环境下软流圈的上涌导致东西向断裂、岩石圈变薄和重力坍缩。这些岩脉形成于1070 Ma左右的地壳伸展时期。澳大利亚约1096 Ma Mahoba （Bundelkhand克拉通）和约1070 Ma Alcurra基性岩脉之间的地球化学相似性支持了一种遗传联系。
{"title":"Geochemistry and petrogenesis of Mesoproterozoic mafic granulite and amphibolite dykes from Saltora, Bankura district, Chhotanagpur Gneissic Complex, eastern India: Implications for their emplacement in within-plate setting","authors":"Poulami Roy, Bapi Goswami, Ankita Basak, Anwesa Sen, Chittaranjan Bhattacharyya","doi":"10.31035/cg20220082","DOIUrl":"10.31035/cg20220082","url":null,"abstract":"<div><div>Distinguishing high-grade mafic-ultramafic rocks originally crystallized from within-plate basaltic magmatism is challenging and crucial because the chemical composition of the igneous rocks has been modified during high-grade metamorphism, causing misidentification of the characters of the parental magma. Proterozoic metamorphosed mafic dykes occur throughout the Chhotanagpur Gneissic Complex (CGC) of eastern Indian shield. The E-W trending mafic dykes from the Saltora area in the southeastern CGC underwent metamorphism in two episodes: M<sub>1</sub> (650 MPa; 770°C) and M<sub>2</sub> (300 MPa; 744°C). The metamafics are enriched in LILE, depleted in HFSE, and display strong fractionation of LREE, nearly flat HREE patterns in a chondrite-normalized REE diagram, and show tholeiitic differentiation trend. Their geochemical affinity is towards rift-related, continental within-plate basalts. About 7%–10% melting of the carbonated spinel-peridotite sub-continental lithospheric mantle (SCLM) produced the parental mafic magma. The pre-existing SCLM was metasomatized by slab-derived fluid during the previous subduction. The upwelling of the asthenosphere in a post-collisional tectonic setting caused E-W trending fractures, lithospheric thinning, and gravitational collapse. These dykes were emplaced during crustal extension around 1070 Ma. The remarkable geochemical similarity between the mafic dykes of Saltora and Dhanbad, the ca. 1096 Ma Mahoba (Bundelkhand craton), and the ca. 1070 Ma Alcurra mafic dykes in Australia supports a genetic link.</div></div>","PeriodicalId":45329,"journal":{"name":"China Geology","volume":"8 1","pages":"Pages 159-186"},"PeriodicalIF":4.6,"publicationDate":"2025-01-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143157012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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