Acta Geologica Sinica ‐ English Edition最新文献

{"title":"Early Paleozoic Tectonic Evolution of the Chinese Southwest Tianshan Orogen: Implications from Detrital Zircon U-Pb Geochronology of the Biedieli Sedimentary Rocks, Northern Wushi Area, NW China","authors":"Hailong HUO,&nbsp;Zhengle CHEN,&nbsp;Qing ZHANG,&nbsp;Fengbin HAN,&nbsp;Wengao ZHANG,&nbsp;Yong WANG,&nbsp;Wenbao WANG","doi":"10.1111/1755-6724.15219","DOIUrl":"https://doi.org/10.1111/1755-6724.15219","url":null,"abstract":"<p>The Southwest Tianshan is the suture zone between the Central Tianshan and the Tarim Craton. To better illustrate the subduction polarity of the Southwest Tianshan Ocean, a systematic detrital zircon LA-ICP-MS U-Pb geochronology of sedimentary rocks of the Devonian Apadaerkang Formation and the Carboniferous Akeqiayi Group of the Biedieli area in the Wushi region is the focus. Detrital zircon ages indicate that the youngest grains of the targeted quartz sandstones are Late Devonian and Early Carboniferous in age, respectively. These ages also have relatively similar age spectra, indicating a similar tectonic setting and source in the Biedieli area during the Devonian to Carboniferous. The main spectrum peaks occur at 2360, 1960, 810, 640 and 440 Ma, with a principal age peak in the early Paleozoic (474–430 Ma), and the Central Tianshan Terrane is indicated as the main source. The detrital zircon geochronology and sedimentary characteristics of the Biedieli rocks indicate that the Paleozoic sedimentary rocks in the northern Wushi region were formed at an active continental margin, associated mainly with the early Paleozoic subduction of the South Tianshan Ocean.</p>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"99 1","pages":"38-52"},"PeriodicalIF":3.5,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143439189","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":"Weathering Process of Parent Material and Accumulation Process of Organic Carbon on the Black Soil Profile: A Case Study from the Keshan Area of the Songnen Plain in Northeast China","authors":"Rui XIA,&nbsp;Guoli YUAN,&nbsp;Minli CUI,&nbsp;Hongxing HOU,&nbsp;Guangming YU,&nbsp;Liangsheng GE,&nbsp;Kaining LÜ,&nbsp;Bingzhang REN","doi":"10.1111/1755-6724.15268","DOIUrl":"https://doi.org/10.1111/1755-6724.15268","url":null,"abstract":"<p>Black soil is essential for maintaining regional food security and promoting global agricultural production. Understanding the weathering process of parent material and the accumulation of organic carbon is crucial to comprehending the developmental history and future trends of black soil, especially against the background of large-scale global cultivation and climate change. Although the importance of black soil formation and evolution cannot be ignored, the relevant research is still very scarce. In this study, a typical eight-meter-deep soil core was collected from the Keshan area of the Songnen Plain, Northeast China, where surface black soil developed on paleo-sediments. Using ¹⁴C dating, the formation age of the black soil was determined. Based on the characteristics of the geochemical composition, grain size and the magnetic susceptibility of the sediments, it was demonstrated that the black soil and its parent material originated from reworked loess. Furthermore, the mass transfer coefficient (<i>τ</i>) of some elements was determined, in order to explore the soil weathering process. By calculating the transported amount of alkaline and alkaline-earth elements, the weathering rate of parent material to black soil was found to be weak, at 0.16 kEq·ha^–1·year^–1. Combining the results of dating and carbon density in the different layers of black soil, the accumulation rate of organic carbon was determined as follows: rapidly increasing in the initial period of 13.2–2.2 ka, reaching its maximum average value of 34.0 g·cm^–2·a^–1 at 2.2–0.8 ka, then showing a decreasing trend with an average value of -77.5 g·cm^–2·a^–1. Compared with regional climate change, Keshan black soil has developed under a colder and wetter climate during the Holocene. Predictably, ongoing global warming may lead to the degradation of black soils in the Songnen Plain, as well as in other regions. Our results will enrich geological knowledge of black soil formation and future evolutionary trends.</p>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"99 1","pages":"258-271"},"PeriodicalIF":3.5,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438910","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":"Acta Geologica Sinica (English Edition) Calls for Submission of Review Papers","authors":"","doi":"10.1111/1755-6724.15275","DOIUrl":"https://doi.org/10.1111/1755-6724.15275","url":null,"abstract":"","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"99 1","pages":"296"},"PeriodicalIF":3.5,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438911","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":"A New Antiarch, Bothriolepis zhujiangyuanensis sp. nov., from the Eifelian (Middle Devonian) of Qujing, Yunnan, SW China","authors":"Zumin XIAN,&nbsp;Zhaohui PAN,&nbsp;Jianhua WANG,&nbsp;Liantao JIA,&nbsp;Yingtian ZHAO,&nbsp;Yanchao LUO,&nbsp;Min ZHU","doi":"10.1111/1755-6724.15269","DOIUrl":"https://doi.org/10.1111/1755-6724.15269","url":null,"abstract":"<p>A new species of <i>Bothriolepis</i> (Placodermi, Antiarcha), <i>B. zhujiangyuanensis</i> sp. nov., is described from the Eifelian (Middle Devonian) Shangshuanghe Formation at the Pearl River Source Scenic Area, Qujing, Yunnan Province, southwestern China and is characterized by a broad postpineal plate bearing a straight anterior margin, a premedian plate wider than long, and a weakly developed dorsal median ridge of the trunk shield. As the eighth <i>Bothriolepis</i> taxon in China, <i>B. zhujiangyuanensis</i> sp. nov. provides a wealth of morphological data to clarify the intrageneric interrelationships. Maximum parsimony analysis, using a revised data set of the genus with 76 ingroup taxa and 72 characters, yields a well-resolved consensus tree for <i>Bothriolepis</i>. The phylogenetic result shows a sister-group relationship between <i>B. zhujiangyuanensis</i> and <i>B. babichevi</i> from Kazakhstan, corroborating the biogeographic proximity between the South China and Kazakhstania blocks during the Middle Devonian.</p>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"99 1","pages":"1-14"},"PeriodicalIF":3.5,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143439187","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":"Review of the Triassic Curvicubitidae (Insecta: Hemiptera), with Description of New Material from China","authors":"Qianqi ZHANG,&nbsp;Edmund A. JARZEMBOWSKI,&nbsp;Bo WANG,&nbsp;Haichun ZHANG","doi":"10.1111/1755-6724.15258","DOIUrl":"https://doi.org/10.1111/1755-6724.15258","url":null,"abstract":"<p>The Curvicubitidae is a Triassic cicada family with some taxa systematically debatable. Here a new curvicubitid species, <i>Beaconiella tongchuanensis</i> sp. nov., is established from the Middle Triassic Tongchuan Entomofauna in NW China. Restudy of the two Australian species of <i>Beaconiella</i> Evans, 1963 (<i>B. fennahi</i> and <i>B. multivenata</i>) confirms that they are different species and first reveals the hindwing venation of <i>B. multivenata</i>. A detailed restudy of <i>Curvicubitus triassicus</i> Hong, 1984 confirms the treatment of <i>Curvicubitus</i> as a junior synonym of <i>Beaconiella</i>. A key to all the six species of <i>Beaconiella</i> in Curvicubitidae is first given. Although reported from only three sites, the family Curvicubitidae potentially was globally distributed during the Middle–Late Triassic, implying that this family probably originated as early as the Early Triassic or even the Permian.</p>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"98 6","pages":"1419-1428"},"PeriodicalIF":3.5,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143252892","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":"Origin of Overpressure and its Effect on Hydrocarbon Enrichment in the Hinterland of Junggar Basin, NW China","authors":"Zaihua HAN,&nbsp;Hua LIU,&nbsp;Jun LI,&nbsp;Bin CHENG,&nbsp;Hongrui ZHANG,&nbsp;Xiangyu MENG","doi":"10.1111/1755-6724.15256","DOIUrl":"https://doi.org/10.1111/1755-6724.15256","url":null,"abstract":"<p>Overpressure is widely developed in deep petroliferous strata in the hinterland of the Junggar Basin. However, a comprehensive understanding of its origin and effect on hydrocarbon distribution and enrichment remains lacking. In this study, we employ five empirical methods and comprehensive geological analysis to identify the origin of overpressure, and uncover the effect of overpressure on hydrocarbon enrichment. The results indicate that disequilibrium compaction is not a significant factor in overpressure generation. Instead, hydrocarbon generation, pressure transfer and diagenesis are the primary causes. The empirical methods support this conclusion. There is a positive correlation between overpressure intensity and source rock thickness and maturity. Notably, widespread cross-formational migration of hydrocarbon bearing fluid occurred, with sandstone overpressure exceeding that of adjacent shale in non-source strata. Furthermore, there is a distinct transformation from smectite to illite near the top of overpressure. Hydrocarbon generation pressurization and pressure transfer significantly effect hydrocarbon enrichment. The overpressure caused by hydrocarbon generation drives hydrocarbon migration and accumulation, establishing an optimal energy configuration between reservoir and cap rock. Faults play a crucial role in hydrocarbon vertical migration and pressure relief. The overpressure in reservoirs can reduce the porosity and permeability thresholds and enhance the charging capacity of oil and gas.</p>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"98 6","pages":"1511-1532"},"PeriodicalIF":3.5,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143252893","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":"Constraints of C-O-Sr Isotope and Elemental Geochemistry on Carbonate Sedimentary System Paleoenvironments of the Middle Jurassic Hepingxiang Formation, Western Simao Basin","authors":"Pengcheng LOU,&nbsp;Zhongying MIAO,&nbsp;Mianping ZHENG,&nbsp;Yuanying LIU,&nbsp;Linhao FANG","doi":"10.1111/1755-6724.15218","DOIUrl":"https://doi.org/10.1111/1755-6724.15218","url":null,"abstract":"<p>Western Yunnan is an important area for Mesozoic marine strata, development of which helps to reconstruct paleoenvironments in the eastern Tethys. To bring knowledge of eastern Tethys up to that of western Tethys, this study focuses on its sedimentary characteristics and paleoenvironmental significance concentrating on the Xiushan section of the Simao Basin with analyses of the petrology, element geochemistry, and C-O-Sr isotopes. Samples are micrite, bioclastic limestone, marl, and mixed calcareous clastic rocks with the ⁸⁷Sr/⁸⁶Sr values of limestone ranging from 0.708255 to 0.708933; the <i>δ¹³C</i> values of the limestone range from –5‰ to +1.5‰ and the <i>δ</i>¹⁸O values range from –13.7‰ to –9.1‰. Based on the results, it is concluded that the Middle Jurassic limestones in the Simao Basin were deposited in a tidal flat environment with a strong influence of terrigenous input. At least one transgression event occurred during the depositional period. The paleoclimate as a whole changed from dry hot to humid hot and back to dry hot again. These enriched and improved results provide further data support for a comparison of the paleoenvironments between the eastern and western Tethys.</p>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"98 6","pages":"1586-1601"},"PeriodicalIF":3.5,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143252814","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":"Numerical Study on the Mechanical Behavior of Hydraulic Fractures under Stress Disturbance, based on a Multi Pb-GBM Method","authors":"Guang LI,&nbsp;Shuaiqi LIU,&nbsp;Fengshan MA,&nbsp;Jie GUO,&nbsp;Xin HUI","doi":"10.1111/1755-6724.15217","DOIUrl":"https://doi.org/10.1111/1755-6724.15217","url":null,"abstract":"<p>Water inrush is a common disaster in submarine mining. The key to preventing this disaster is to restrict the water-conducting fissure propagation induced by mining from forming a flow channel to communicate with the overlying aquifer. The mechanical behavior of hydraulic fractures under stress disturbance lies at the heart of the problem. Hence, the multiple parallel bond—grain-based model (multi Pb-GBM) is introduced to explore the hydraulic fracture evolution law of crystalline granite under the influence of stress disturbance. The results show that: hydraulic fracturing under stress disturbance is clearly affected by the stress wave frequency; the higher the frequency is, the more difficult it is to crack, but the crack propagation speed is faster after crack initiation; the propagation direction of a crack is deflected towards the propagation direction of the stress wave and the crack dip angle is controlled by the maximum principal stress; the internal crystal boundary of the same mineral is the most stable one among the three contacts, the contact boundary between different minerals being the most fragile one. This research not only has a practical application value to seabed mining engineering, but also has important theoretical significance in enriching deep rock mechanics theory.</p>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"98 6","pages":"1659-1671"},"PeriodicalIF":3.5,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143252890","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":"Hydrochemical Constraints on the Flowing Paths of Groundwater in Limestone Reservoirs beneath the Pingdingshan Coalfield in North China","authors":"Zhanhui WU,&nbsp;Xinyi WANG,&nbsp;Jiexiang LI,&nbsp;Junchao CUI,&nbsp;Bo ZHANG","doi":"10.1111/1755-6724.15255","DOIUrl":"https://doi.org/10.1111/1755-6724.15255","url":null,"abstract":"<p>The karst groundwater of Cambrian limestone may become an important water source for industry and agriculture in the Pingdingshan area, and is also a potential threat to mining safety. Therefore, to find out the origin, flow paths, and hydrogeochemical processes of karst groundwater beneath the Pingdingshan coalfield, a total of 16 water samples were collected. Our findings confirmed that the karst groundwater is mainly recharged by precipitation. The precipitation can directly supply the deep aquifer of the karst water system through the southwest limestone outcrops, and this area mostly includes the southern part of mines No. 11, No. 9, and the hidden outcrops in the southern part of mine No. 2. What is more, the areas adjacent to the synclinal axis, including mines No. 10, No. 12, and No. 8, may be the main discharge areas. A mixing model of ⁸⁷Sr/⁸⁶Sr and Sr showed that in the southwest Pingdingshan coalfield, the proportion of precipitation decreased gradually from the recharge area to the discharge area, ranging from 89.1% to 17.1%. Besides, the northeast Pingdingshan coalfield is another recharge area for the whole karst system, thus, the infiltrating groundwater will indirectly supply the deep aquifer through Quaternary deposition near the mine No. 13. Our research results can provide theoretical support for the prevention and control of groundwater disasters and the development and utilization of regional groundwater resources in the coalfield in Northern China.</p>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"98 6","pages":"1615-1636"},"PeriodicalIF":3.5,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143252894","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":"Fracture Effectiveness and its Influence on Gas Productivity in Ultra-deep Tight Sandstone Reservoirs of the Keshen Gas Field, Tarim Basin","authors":"Xiaotong XU,&nbsp;Lianbo ZENG,&nbsp;Shaoqun DONG,&nbsp;Pengxiang DIWU,&nbsp;Haiming LI,&nbsp;Jianzhong LIU,&nbsp;Gaosong HAN,&nbsp;Hui XU,&nbsp;Chunqiu JI","doi":"10.1111/1755-6724.15259","DOIUrl":"https://doi.org/10.1111/1755-6724.15259","url":null,"abstract":"<p>Fracture effectiveness plays a key role in gas productivity of ultra-deep tight sandstone reservoirs, Kuqa depression, Tarim Basin. Based on cores, thin sections, well logging, well testing and production data, the study evaluated fracture effectiveness and illustrated its impacts on gas productivity. High-angle and vertical shear fractures are the most important types. Distribution of effective fractures shows great heterogeneous. Fracture effectiveness is influenced by tectonism, diagenesis and in-situ stress. Earlier fractures or fractures in close to gypsum rock are easier to be filled. Completely filled fractures can be reopened under late tectonism. Dissolution improves local fracture effectiveness. Minerals spanning fracture surfaces protect fracture effectiveness from late compression. Fractures filled with calcite can be activated by acidification. Effective fractures parallel to maximum horizontal principal compressive stress direction show larger aperture. Overpressure can decrease the effective normal stress to maintain fracture effectiveness. With exploitation, decline in pore pressure reduces fracture effectiveness. Linear density, aperture, and strike of effective fractures influence gas productivity. Effective fractures greatly enhance matrix permeability. Therefore, more abundant and larger aperture fractures are always corresponded to higher productivity. However, effective fractures also facilitate late water invasion, especially, both mutually parallel. Intense water invasion leads to rapidly declines in productivity.</p>","PeriodicalId":7095,"journal":{"name":"Acta Geologica Sinica ‐ English Edition","volume":"98 6","pages":"1557-1573"},"PeriodicalIF":3.5,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143252888","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}