Acta Geologica Sinica ‐ English Edition最新文献_第3页

Ambient Noise Tomography Shows Tibetan Plateau Push Affects Deep Crust Under Longmenshan and Sichuan Basin 环境噪声层析成像显示青藏高原推力对龙门山和四川盆地深部地壳的影响

IF 2.1 3区地球科学

Acta Geologica Sinica ‐ English Edition Pub Date : 2026-07-02 Epub Date: 2026-05-08 DOI: 10.1111/1755-6724.70057

Hui Qian, James Mechie, Haibing Li, Xiaosan Zhu, Dongliang Liu

{"title":"Ambient Noise Tomography Shows Tibetan Plateau Push Affects Deep Crust Under Longmenshan and Sichuan Basin","authors":"Hui Qian, James Mechie, Haibing Li, Xiaosan Zhu, Dongliang Liu","doi":"10.1111/1755-6724.70057","DOIUrl":"https://doi.org/10.1111/1755-6724.70057","url":null,"abstract":"<div>\u0000 \u0000 <p>A dense seismological profile with 45 stations at a spacing of 5–10 km across the Longmenshan fault zone was deployed from 2018 to 2020. It complemented an array of 80 stations deployed in the region from 2012 to 2013. Using data from both deployments, dispersion curves were obtained from ambient noise Green's functions. Subsequently, a 3D shear (S) velocity model was derived using tomographic methods. Combining this S-wave velocity model with an existing 3D compressional velocity model, a 3D Poisson's ratio model was derived. These models show that the Precambrian Pengguan complex, which cores this part of the Longmenshan, is approximately 20-km thick and displays high velocities and low Poisson's ratios. The result of this study is that, along the dense profile, the complex is underlain between 20 and 40 km depth by low S velocities, which likely extend out beneath the Sichuan Basin in a 10-km thick basal crustal layer. These low S velocity zones have high Poisson's ratios and are best explained as a result of the compressive forces and push exerted by the Tibetan Plateau, causing processes such as ductile shearing and fluid/melt infiltration to occur.</p>\u0000 </div>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"100 3","pages":"637-650"},"PeriodicalIF":2.1,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148357983","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}

引用次数: 0

New Organic Matter Characterisation and Paleodepositional Conditions of the Lower Cretaceous Lacustrine Shale in the Synrift Basin (Babouri–Figuil Basin, North Cameroon): Implication for Petroleum Exploration 喀麦隆北部Babouri-Figuil盆地下白垩统湖相页岩有机质新特征及古沉积条件：对油气勘探的启示

IF 2.1 3区地球科学

Acta Geologica Sinica ‐ English Edition Pub Date : 2026-07-02 Epub Date: 2026-06-01 DOI: 10.1111/1755-6724.70069

Aicha Maloum, Bachirou Mfayakouo Chavom, François Baudin, Sylvain Garel, Johann Schnyder, Josiane Flore Kwéa Nzouedjio, Jules Alex Yugyè

{"title":"New Organic Matter Characterisation and Paleodepositional Conditions of the Lower Cretaceous Lacustrine Shale in the Synrift Basin (Babouri–Figuil Basin, North Cameroon): Implication for Petroleum Exploration","authors":"Aicha Maloum, Bachirou Mfayakouo Chavom, François Baudin, Sylvain Garel, Johann Schnyder, Josiane Flore Kwéa Nzouedjio, Jules Alex Yugyè","doi":"10.1111/1755-6724.70069","DOIUrl":"https://doi.org/10.1111/1755-6724.70069","url":null,"abstract":"<div>\u0000 \u0000 <p>The synrift basins of the West and Central African Rift System (WCARS) contain Lower Cretaceous lacustrine shale, which is considered to be the main source rock of hydrocarbons that accumulated in these basins. Recent studies of these lacustrine shales do not consider the diversity of organic-rich lithofacies within these basins. This study aims to investigate Lower Cretaceous organic-rich facies in the Babouri–Figuil Basin, part of the WCARS. The samples collected (<i>n</i> = 173) were subjected to bulk geochemical and elemental analyses and organic petrological observations. Oil shales exhibit a higher average total organic carbon (TOC) value of 17 wt%, whereas the associated facies contain less than 2 wt% TOC. The oil shales display an average hydrogen index (HI) value of 769 mg HC/g TOC. However, the associated facies generally exhibit HI values below 300 mg HC/g TOC. Oil shales and associated facies contain well-preserved kerogen, ranging from Types I to III, indicating good to very good potential for hydrocarbon generation. Rock-Eval pyrolysis reveals relatively similar thermal maturity across the studied organic-rich facies, with an average <i>T</i><sub>max</sub> value of 430°C, displaying an immature to early oil window stage of maturation. These results suggest that the WCARS basins generally hold promise for further petroleum exploration efforts.</p>\u0000 </div>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"100 3","pages":"846-869"},"PeriodicalIF":2.1,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358106","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}

引用次数: 0

Detrital Zircon U-Pb-Hf Isotopes of the Changzhougou Formation in the Central–Southern Taihang Mountains and Their Tectonic Implications 太行山中南部常州沟组碎屑锆石U-Pb-Hf同位素及其构造意义

IF 2.1 3区地球科学

Acta Geologica Sinica ‐ English Edition Pub Date : 2026-07-02 Epub Date: 2026-05-11 DOI: 10.1111/1755-6724.70046

Qianyu Li, Wen Zhang, Wanpeng Zhou, Pinghua Liu, Lilin Du, Chonghui Yang, Jianlong Wang, Hao Sun, Biao Fu, Guochun Zhao

{"title":"Detrital Zircon U-Pb-Hf Isotopes of the Changzhougou Formation in the Central–Southern Taihang Mountains and Their Tectonic Implications","authors":"Qianyu Li, Wen Zhang, Wanpeng Zhou, Pinghua Liu, Lilin Du, Chonghui Yang, Jianlong Wang, Hao Sun, Biao Fu, Guochun Zhao","doi":"10.1111/1755-6724.70046","DOIUrl":"https://doi.org/10.1111/1755-6724.70046","url":null,"abstract":"<div>\u0000 \u0000 <p>The Changchengian System represents one of the earliest sedimentary covers deposited on the Archean–Paleoproterozoic basement of the North China Craton. We report zircon U-Pb-Hf isotope data for Changzhougou Formation sandstones in the Chaiguan area, central–southern Taihang Mountains. The youngest detrital zircon ages (∼1782 Ma) constrain the maximum depositional age to ∼1.78 Ga. Combined with regional constraints, deposition is bracketed between ∼1.76 and ∼1.64 Ga. Detrital zircon age spectra exhibit a dominant peak at ∼2.5 Ga, with secondary peaks at 2.8–2.6, 2.2–2.0 and 1.9–1.8 Ga, alongside rare ∼3.25 and ∼3.70 Ga grains. Coupled with Hf isotopic signatures, these diverse populations suggest derivation primarily from the basement of the Trans-North China Orogen. Although the age spectra are broadly similar to the Archean-dominated Yanliao Rift, the presence of subordinate Paleoproterozoic and minor Paleoarchean grains, coupled with a predominant southeast-to-northwest paleocurrent, implies a closer affinity with the Xiong'er Group. These results suggest deposition in an extensional setting—likely associated with the breakup of the Columbia supercontinent—and record a northward marine transgression from the Xiong'er Rift Basin. Consequently, the central–southern Taihang Mountains served as a critical transition zone connecting the Xiong'er Basin with the Yanliao Basin.</p>\u0000 </div>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"100 3","pages":"556-575"},"PeriodicalIF":2.1,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358191","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}

引用次数: 0

Identification and Tectonic Significance of Ocean Island-Seamount Systems in the Middle Segment of the Yarlung Zangbo Suture Zone 雅鲁藏布江缝合带中段洋岛海山体系识别及其构造意义

IF 2.1 3区地球科学

Acta Geologica Sinica ‐ English Edition Pub Date : 2026-07-02 Epub Date: 2026-05-18 DOI: 10.1111/1755-6724.70062

Youpeng Zhang, Chao Wang, Haoxuan Li, Zhenbang Liu, Xiaodong Wang

{"title":"Identification and Tectonic Significance of Ocean Island-Seamount Systems in the Middle Segment of the Yarlung Zangbo Suture Zone","authors":"Youpeng Zhang, Chao Wang, Haoxuan Li, Zhenbang Liu, Xiaodong Wang","doi":"10.1111/1755-6724.70062","DOIUrl":"https://doi.org/10.1111/1755-6724.70062","url":null,"abstract":"<div>\u0000 \u0000 <p>Mesozoic exotic tectonic fragments in the Yarlung Zangbo suture zone (YZSZ) preserve key records for reconstructing Neo-Tethyan evolution. This study investigates basalts and limestones from the Buma area in the central segment through petrology, calcite U-Pb geochronology, and whole‑rock geochemistry. Calcite U-Pb dating of two recrystallized limestone samples yields ages of ca. 244 Ma and ca. 246 Ma. The Buma basalts are subalkaline, with SiO<sub>2</sub> contents of 37.95–53.61 wt.% and high TiO<sub>2</sub> (1.63–3.43 wt.%). Their rare earth elements (REEs) and trace element patterns resemble Hawaiian ocean island basalts (OIBs), and they exhibit moderately depleted Nd isotopic compositions (<i>ε</i><sub>Nd</sub>(<i>t</i>) = +4.20 to +4.93). The pronounced negative Ce anomalies in limestones and the absence of terrigenous clastic components in collapse conglomerates indicate deposition in an open-ocean setting. Integrated evidence indicates that the basalt–limestone association in the Buma area represents a Neo-Tethyan ocean island-seamount system. Combined with the 253 Ma continental rift basalts from the Zhongba area, this result suggests that the opening of the Neo-Tethys Ocean in the central segment of the YZSZ occurred no later than the Early Triassic, providing key empirical evidence for the spatiotemporal framework of the early evolution of the Neo-Tethys Ocean.</p>\u0000 </div>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"100 3","pages":"539-555"},"PeriodicalIF":2.1,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358137","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}

引用次数: 0

Geochemical Characteristics and Their Geological Significance of Zircon and Apatite From the Wunugetushan Porphyry Cu–Mo Deposit, Inner Mongolia, NE China 内蒙古乌奴格图山斑岩型铜钼矿床锆石和磷灰石地球化学特征及其地质意义

IF 2.1 3区地球科学

Acta Geologica Sinica ‐ English Edition Pub Date : 2026-07-02 Epub Date: 2026-05-28 DOI: 10.1111/1755-6724.70067

Genyuan JI, Sihong Jiang, Yang Cheng, Hongyan Bao, Huachuan Zhang

{"title":"Geochemical Characteristics and Their Geological Significance of Zircon and Apatite From the Wunugetushan Porphyry Cu–Mo Deposit, Inner Mongolia, NE China","authors":"Genyuan JI, Sihong Jiang, Yang Cheng, Hongyan Bao, Huachuan Zhang","doi":"10.1111/1755-6724.70067","DOIUrl":"https://doi.org/10.1111/1755-6724.70067","url":null,"abstract":"<p>The Wunugetushan (Wushan) porphyry Cu–Mo deposit is located in the southwestern segment of the Derbugan metallogenic belt. In this study, geochemical analyses of zircon and apatite from pre-mineralization biotite granite (BG) and inter-mineralization monzogranitic porphyry (MGP) were conducted, aiming to discuss petrogenesis and their constraints on mineralization. BG apatites have distinctly lower <i>ε</i><sub>Nd</sub>(<i>t</i>) (−4.28 to −1.03) and higher two-stage Nd model ages (1063–1328 Ma) than MGP apatites, showing values of −0.23 to +1.31 and 860–984 Ma. MGP zircons have higher Ce/Nd, Ce<sup>4+</sup>/Ce<sup>3+</sup>, <i>δ</i>Eu, 10,000 × <i>δ</i>Eu/Y and (Ce/Nd)/Y values, and lower Yb/Gd values than those in BG zircon. These geochemical features suggest that the MGP has a higher oxidation state and higher water content of magma than BG. Trace element concentrations in zircon and apatite reveal that the MGP is less evolved and exhibits amphibole-dominated fractionation. In contrast, the BG is evolved and shows plagioclase- and apatite-dominated fractionation. We propose that the key factors making the MGP fertile for mineralization, including its high Cl, S and H<sub>2</sub>O contents, high oxidation state, significant fluid exsolution and multiple recharges of deep-seated mafic magma, were all critical for the Wushan porphyry Cu–Mo deposit.</p>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"100 3","pages":"795-813"},"PeriodicalIF":2.1,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1111/1755-6724.70067","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358150","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}

引用次数: 0

Tungsten-Tin Mineralization and Its Dynamic Background in the Bozhushan Ore District, Southeastern Yunnan: Constraints From Petrology, Geochronology and Geochemistry 滇东南博竹山矿区钨锡矿化及其动力背景：岩石学、年代学和地球化学约束

IF 2.1 3区地球科学

Acta Geologica Sinica ‐ English Edition Pub Date : 2026-07-02 Epub Date: 2026-06-04 DOI: 10.1111/1755-6724.70071

Bode Lu, Xuelong Liu, Shitao Zhang, Jialong Cheng, Xianchao Chen, Jiehu Zhou, Xue Mi, Tao Wang, Guangzhi Meng

{"title":"Tungsten-Tin Mineralization and Its Dynamic Background in the Bozhushan Ore District, Southeastern Yunnan: Constraints From Petrology, Geochronology and Geochemistry","authors":"Bode Lu, Xuelong Liu, Shitao Zhang, Jialong Cheng, Xianchao Chen, Jiehu Zhou, Xue Mi, Tao Wang, Guangzhi Meng","doi":"10.1111/1755-6724.70071","DOIUrl":"https://doi.org/10.1111/1755-6724.70071","url":null,"abstract":"<div>\u0000 \u0000 <p>The W–Sn–Ag–Pb–Zn polymetallic deposit in the Bozhushan ore concentration area is closely related to Late Cretaceous magmatic activity, and the diagenetic age of the granite body is 88.8–87.1 Ma. The granites in the Bozhushan ore district are characterized by high silica and aluminium contents, high abundances of Rb, Sr, Sn and Th, and low contents of Ba, P and Ti. The granites are peraluminous S-type granites that underwent fractional crystallization during magmatic evolution. The ε<sub>Hf</sub>(<i>t</i>) values of the zircons from −17.92 to −1.77, with <i>T</i><sub>DM2</sub> age ranging from 1.1 to 2.0 Ga, indicate that they may be mainly derived from partial melting of the lower crust without the addition of mantle-derived materials. The Late Cretaceous magmatic activity in the Bozhushan area formed in a syn-collisional tectonic environment and transitioned to a post-collisional orogenic environment. In the later stage, it transforms into a post-collisional extensional environment. The upwelling of deep-seated asthenospheric melts has provided substantial fluxes of W, Sn, Pb, Zn and other ore-forming elements. The ore-forming fluid and materials carried by magma rise and migrate along favourable parts of the structure to precipitate and mineralize. Therefore, understanding the tungsten-tin metallogenic history in the Bozhushan ore district is important.</p>\u0000 </div>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"100 3","pages":"814-833"},"PeriodicalIF":2.1,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358271","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}

引用次数: 0

Hydrous Leaching in the Lithospheric Mantle Beneath East China Indicated by Sapphire Deposits 蓝宝石矿床指示的中国东部岩石圈地幔含水浸出

IF 2.1 3区地球科学

Acta Geologica Sinica ‐ English Edition Pub Date : 2026-07-02 Epub Date: 2026-05-12 DOI: 10.1111/1755-6724.70058

Xiuqi Shang, Weidong Sun, Xing Ding, Ruifang Huang, Shuai Yuan, Guozhi Xie, Kun Wang

{"title":"Hydrous Leaching in the Lithospheric Mantle Beneath East China Indicated by Sapphire Deposits","authors":"Xiuqi Shang, Weidong Sun, Xing Ding, Ruifang Huang, Shuai Yuan, Guozhi Xie, Kun Wang","doi":"10.1111/1755-6724.70058","DOIUrl":"https://doi.org/10.1111/1755-6724.70058","url":null,"abstract":"<div>\u0000 \u0000 <p>Hydration of the lithospheric mantle is a critical part of deep water cycling and is essential in shaping Earth's habitable environments. At low water/rock ratios, water is stored in nominally anhydrous minerals or hydrous minerals; however, at high water/rock ratios, the leaching effect of water on mantle minerals remains poorly understood. Here, we present hydrothermal experiments of the ‘phlogopite + H<sub>2</sub>O’ system at 500°C–950°C and 0.9–1.8 GPa, showing that incongruent dissolution of phlogopite in water produces corundum (Al<sub>2</sub>O<sub>3</sub>) as an insoluble residual phase at pressures above ∼1.5 GPa. Water leaches soluble components (K, Mg and Si) from phlogopite, leaving corundum as the residue under lithospheric mantle P‒T conditions. This provides a mechanistic explanation for sapphire formation in the lithospheric mantle, consistent with natural sapphire gemstones occurring as mantle xenoliths and xenocrysts within alkaline basalts. Sapphires form through hydrous leaching of phlogopite at depths greater than ∼50 km and are subsequently transported to the surface by alkaline basaltic magmas originating from at least ∼70 km depth. The widespread sapphire deposits associated with alkaline basalts in East China indicate extensive hydrous leaching of the lithospheric mantle, with water ultimately sourced from the subducted slab, mantle transition zone or mantle plumes.</p>\u0000 </div>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"100 3","pages":"834-845"},"PeriodicalIF":2.1,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358195","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}

引用次数: 0

Carboniferous Magmatic Cyclicity of the NW Junggar Arc, Central Asian Orogenic Belt: Insights From Seismicity, Zircon U-Pb Ages and Geochemistry 中亚造山带西北准噶尔弧石炭系岩浆旋回性：来自地震活动、锆石U-Pb年龄和地球化学的启示

IF 2.1 3区地球科学

Acta Geologica Sinica ‐ English Edition Pub Date : 2026-07-02 Epub Date: 2026-05-11 DOI: 10.1111/1755-6724.70068

Yantong Wang, Xuanlong Shan, Guoqiang An, Ang Li, Yuhui Feng, Jian Yi, Yu Bai

{"title":"Carboniferous Magmatic Cyclicity of the NW Junggar Arc, Central Asian Orogenic Belt: Insights From Seismicity, Zircon U-Pb Ages and Geochemistry","authors":"Yantong Wang, Xuanlong Shan, Guoqiang An, Ang Li, Yuhui Feng, Jian Yi, Yu Bai","doi":"10.1111/1755-6724.70068","DOIUrl":"https://doi.org/10.1111/1755-6724.70068","url":null,"abstract":"<div>\u0000 \u0000 <p>The Central Asian Orogenic Belt (CAOB) is Earth's largest Phanerozoic accretionary orogen, yet the tempo and mechanisms of arc magmatism remain incompletely constrained. Carboniferous island-arc volcanism in the Zhongguai Uplift, northwestern Junggar Basin, is investigated to establish magmatic cyclicity during closure of the Paleo-Asian Ocean. Integrated 3D seismic interpretation and well-log correlation, together with zircon U-Pb geochronology, whole-rock major–trace element geochemistry and Sr-Nd-Pb isotopes, subdivide the Carboniferous volcanic succession into three volcanic cycles. Cycle I (ca. 335–322 Ma; Early Carboniferous) is dominated by intermediate to mafic lavas and volcanic breccias and exhibits typical subduction-arc characteristics. Cycle II (ca. 321–317 Ma; Late Carboniferous) comprises a felsic-dominated interval (dacite–tonalite) and is interpreted to relate to slab-window processes. Cycle III (ca. 313–303 Ma; latest Carboniferous–earliest Permian) forms a thick bimodal assemblage from andesite to rhyolite, consistent with arc–continent collision and subsequent tectonic reworking. Geochemical–isotopic signatures evolve from a fluid-modified depleted mantle source in Cycle I, to highly fractionated and slab-influenced melts in Cycle II, and to mixed mantle–crust magmas with locally developed A-type affinities in Cycle III. The cycle-based stratigraphic and geochemical framework documents a transition from oceanic subduction to collision along the West Junggar margin, refines the timing of Paleo-Asian Ocean closure and highlights that Carboniferous arc magmatism occurred in discrete pulses linked to tectonic events. This integrated approach provides constraints on episodic arc magmatism and associated continental crustal growth in accretionary orogens.</p>\u0000 </div>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"100 3","pages":"651-672"},"PeriodicalIF":2.1,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358189","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}

引用次数: 0

Study on the Difference of Hydrocarbon Generation and Transformation of Lacustrine Shale in China Based on the Kinetic Mechanism Method 基于动力学方法的中国湖相页岩生烃转化差异性研究

IF 2.1 3区地球科学

Acta Geologica Sinica ‐ English Edition Pub Date : 2026-07-02 Epub Date: 2026-04-29 DOI: 10.1111/1755-6724.70048

Junqing Chen, Kanyuan Shi, Kuiyou Ma, Fujie Jiang, Xiongqi Pang, Hong Pang, Zhuoheng Chen, Guili Ma, Yuying Wang

{"title":"Study on the Difference of Hydrocarbon Generation and Transformation of Lacustrine Shale in China Based on the Kinetic Mechanism Method","authors":"Junqing Chen, Kanyuan Shi, Kuiyou Ma, Fujie Jiang, Xiongqi Pang, Hong Pang, Zhuoheng Chen, Guili Ma, Yuying Wang","doi":"10.1111/1755-6724.70048","DOIUrl":"https://doi.org/10.1111/1755-6724.70048","url":null,"abstract":"<div>\u0000 \u0000 <p>Investigation of the dynamic transformation characteristics of hydrocarbon generation and evaluation of hydrocarbon potential and expulsion are of guiding significance for the evaluation of lacustrine shale oil and gas resources. A total of 1977 pyrolysis dataset points were collected from lacustrine shale samples selected from 202 wells across eight regions within five basins in China. The kinetic parameters were derived, and the original hydrogen index was obtained to identify the kerogen types. Subsequently, the original total organic carbon was estimated to analyse organic matter enrichment. Finally, the hydrocarbon generation, retention and expulsion characteristics of the lacustrine shales were compared. The results demonstrate that lacustrine shales in China exhibit different hydrocarbon generation, retention and expulsion characteristics, which are controlled by both basin lake type and primary productivity. Type I kerogens exhibit the largest hydrocarbon generation and retention amounts and the highest hydrocarbon expulsion efficiency. These kerogens also exhibit the narrowest hydrocarbon generation window and the earliest hydrocarbon expulsion. However, when the source rocks have a high sulphur content, hydrocarbon generation and expulsion occur earlier. Furthermore, when the source rock contains large amounts of terrestrial organic matter input, the hydrocarbon generation and expulsion windows broaden.</p>\u0000 </div>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"100 3","pages":"870-893"},"PeriodicalIF":2.1,"publicationDate":"2026-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148358251","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}

引用次数: 0

Brittle Structural Control and Fluid Progress of the Jinqingding Gold Deposit: Implications for Epizonal Gold Mineralization 金青顶金矿床脆性构造控制与流体演化：对层际金矿化的指示意义

IF 2.1 3区地球科学

Acta Geologica Sinica ‐ English Edition Pub Date : 2026-07-02 Epub Date: 2026-05-02 DOI: 10.1111/1755-6724.70047

Xiaohu Wang, Yuke Shen, Changshan Wei, Fengbin Han, Tao Guo, Huisheng Wang, Jiantao Yu, Yubo Song, Bo Wang, Longji Gong, Guijie Li

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