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Surface Processes Driving Intracontinental Basin Subsidence in the Context of India–Eurasia Collision:Evidence from Flexural Subsidence Modeling of the Cenozoic Southern Tarim Basin along the West Kunlun Foreland,NW Tibetan Plateau

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Acta Geologica Sinica(English Edition) 2023年第6期97卷 1778-1786页

作者： HUANG Hao LIN Xiubin AN Kaixuan ZHANG Yuqing CHEN Hanlin cheng xiaogan LI Chunyang Key Laboratory of Geoscience Big Data and Deep Resources of Zhejiang Province School of Earth SciencesZhejiang UniversityHangzhou 310027China Research Center for Structures in Oil and Gas-Bearing Basins Ministry of EducationHangzhou 310027China Research Institute of Petroleum Exploration and Development PetroChinaBeijing 100083China Research Institute of Petroleum Exploration and Development Sinopec Southwest Oil and Gas CompanyChengdu 610041China

The India–Eurasia collision has produced a number of Cenozoic deep intracontinental basins,which bear important information for revealing the far-afield responses to the remote *** their significance,their subsiding mechanism remains the subject of debate,with end-member models attributing it to either orogenic or sedimentary *** this study,we conduct flexural subsidence modeling with a two-dimensional finite elastic plate model on the Hotan-Mazatagh section along the southern Tarim Basin,which defines a key region in the foreland of the West Kunlun Orogen,along the NW margin of the Tibetan *** modeling results indicate that the orogenic load of West Kunlun triggers the southern Tarim Basin to subside by up to less than ~6 km,with its impact weakening towards the basin interiors until ~230 km north from the Karakax *** sedimentary load,consisting of Cenozoic strata,forces the basin to subside by ~2 to~7 *** combination with the retreat of the proto-Paratethys Sea and the paleogeographic reorganization of the Tarim Basin,we propose that surface processes,in particular a shift from an exorheic to an endorheic drainage system associated with the consequent thick sedimentary load,played a decisive role in forming deep intracontinental basins in the context of the India-Eurasia collision.

关键词： flexural subsidence modeling India-Eurasia collision West Kunlun Tarim Basin Northwest Tibetan Plateau

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Conceptual models for fracturing in fault related folds

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Mining Science and Technology 2010年第1期20卷 103-108页

作者： LIN Xiubin CHEN Hanlin cheng xiaogan SHEN Zhongyan YANG Shufeng XIAO Ancheng Department of Earth Sciences Zhejiang University Hangzhou 310027 China Research Center for the Structures in Oil and Gas Bearing Basin Ministry of Education Hangzhou 310027 China

Fault related folds and fractures, which always improve reservoirs and trap capacity, especially in the oil and gas fields in western China, are of extreme importance for oil and gas exploration. Based on four assumptions and fault related fold theory, we propose four conceptual models for fracturing in fault related folds, i.e., a simple-step parallel fault bend anticline, a simple-step parallel fault propagation anticline, a multiple-bend fault-bend fold and a break-forward imbricate. Fracture conditions depend on structural evolution and specific site conditions. A case study of the Kulongshan Anticline in the Jiuquan Basin shows that our conceptual models match reality data very well.

关键词： fracturing fault related fold oil and gas exploration

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The Exhumation History of North Qaidam Thrust Belt Constrained by Apatite Fission Track Thermochronology:Implication for the Evolution of the Tibetan Plateau

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Acta Geologica Sinica(English Edition) 2016年第3期90卷 870-883页

作者： cheng xiaogan LIN Xiubin WU Lei CHEN Hanlin XIAO Ancheng GONG Junfeng ZHANG Fengqi YANG Shufeng School of Earth Sciences Zhejiang UniversityHangzhou 310027ZhejiangChina Research Center for Structures in Oil-and Gas-Bearing Basins Ministry of EducationHangzhou 310027ZhejiangChina

Determining the spatio-temporal distribution of the deformation tied to the India-Eurasian convergence and the impact of pre-existing weaknesses on the Cenozoic crustal deformation is significant for understanding how the convergence between India and Eurasia contributed to the development of the Tibetan Plateau. The exhumation history of the northeastern Tibetan Plateau was addressed in this research using a new apatite fission track （AFT） study in the North Qaidam thrust belt （NQTB）. Three granite samples collected from the Qaidam Shan pluton in the north tied to the Qaidam Shan thrust, with AFT ages clustering in the Eocene to Miocene. The other thirteen samples obtained from the Luliang Shan and Yuka plutons in the south related to the Luliang Shan thrust and they have showed predominantly the Cretaceous AFT ages. Related thermal history modeling based on grain ages and track lengths indicates rapid cooling events during the Eocene-early Oligocene and since late Miocene within the Qaidam Shan, in contrast to those in the Cretaceous and since the Oligocene-Miocene in the Luliang Shan and Yuka region. The results, combined with published the Cretaceous thermochronological ages in the Qaidam Shan region, suggest that the NQTB had undergo rapid exhumation during the accretions along the southern Asian Andean-type margin prior to the India-Eurasian collision. The Cenozoic deformation initially took place in the North Qaidam thrust belt by the Eocene, which is consistent with the recent claim that the deformation of the northeastern Tibetan Plateau initiated in the Eocene as a response to continental collision between India and Eurasia. The immediate deformation responding to the collision is tentatively attributed to the preexisting weaknesses of the lithosphere, and therefore the deformation of the northeastern Tibetan Plateau should be regarded as a boundary-condition-dependent process.

关键词： apatite fission track Qaidam Shan Luliang Shan North Qaidam thrust belt Tibetan plateau

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Deformation geometry and timing of the Wupoer thrust belt in the NE Pamir and its tectonic implications

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Frontiers of Earth Science 2016年第4期10卷 751-760页

作者： xiaogan cheng Hanlin CHEN Xiubin LIN Shufeng YANG Shenqiang CHEN Fenfen ZHANG Kang LI Zelin LIU School of Earth Sciences Zhejiang University Hangzhou 310027 China Research Center for Structures in Oil- and Gas-Bearing Basins Ministry of Education Hangzhou 310027 China Department of Exploration Geophysics College of Geophysics and Information Engineering China University of Petroleurn-Beijing Beijing 102249 China

The Pamir region, located to the northwest of the Tibetan Plateau, provides important information that can aid the understanding of the plateau＇s tectonic evolution. Here we present new findings on the deforma- tion geometry and timing of the Wupoer thrust belt at the northeastem margin of Pamir. Field investigations and interpretations of seismic profiles indicate that the eastern portion of the Wupoer thrust belt is dominated by an underlying foreland basin and an overlying piggy-back basin. A regional unconformity occurs between the Pliocene （N2） and the underlying Miocene （NI） or Paleogene （Pg） strata associated with two other local unconformities between Lower Pleistocene （Q1） and N2 and between Middle Pleistocene （Q2-4） and Q1 strata. Results of structural restorations suggest that compres- sional deformation was initiated during the latest Miocene to earliest Pliocene, contributing a total shortening magnitude of 48.6 km with a total shortening rate of 48.12%, most of which occurred in the period from the latest Miocene to earliest Pliocene. These results, com- bined with previous studies on the Kongur and Tarshkor- gan extensional system, suggest an interesting picture of strong piedmont compressional thrusting activity concur- rent with interorogen extensional rifting. Combining these results with previously published work on the lithospheric architecture of the Pamir, we propose that gravitational collapse drove the formation of simultaneous extensional and compressional structures with a weak, ductile middle crustal layer acting as a decollement along which both the extensional and compressional faults merged.

关键词： Pamir Kongur Wupoer gravitational collapse fold-and-thrust belt

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Tectonic evolution of Tethyan tectonic field, formation of Northern Margin basin and explorative perspective of natural gas in Tarim Basin

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Chinese Science Bulletin 2002年第S1期47卷 34-41页

作者： YANG Shufeng JIA chengzao CHEN HanlinWEI Guoqi cheng xiaogan JIA Dong XIAO Ancheng GUO Shaojie Department of Earth Science Zhejiang UniversityHangzhou 310027China PetroChina Company Limited Beijing 100724China Langfang Branch of Research Institute of Petroleum Exploration and Development PetroChinaLangfang 065007China Department of Earth Sciences Nanjing UniversityNanjing 310027China Dpartment of Geology Peking UniversityBeijing 100871China

Analyzing the characteristics of the Tethyantectonic field, the authors think that the Tethyan tectonicfield underwent three evolutional stages: closing of Pa-leo-Tethys and rifting of Neo-Tethys from early Permian tolate Triassic, subduction of Neo-Tethys and collision betweenthe Indian plate and the Eurasia plate from Jurassic to earlyof low Tertiary, and collision between the Arab plate and theEurasia plate and the A-type subduction of Indian plate fromlate of low Tertiary to the present. Combining the evolutionof the Tethyan orogenic belt with the characteristics of theNorthern Margin basin, it is suggested that the sedimentaryand tectonic characteristics and types of the Northern Mar-gin basin are controlled by the formation and evolution ofthe Tethyan orogenic belt and the ingression of Tethys. Theevolution of Northern Margin basin can be divided into threedevelopment stages: back-arc foreland basin from late Per-mian to Triassic, the back-arc fault subsidence and depres-sion from Jurassic to the early of low Tertiary, and the reac-tive foreland basin from the late of low Tertiary to the pre-sent. The Northern Margin basin in the Tethyan tectonicfield is an important region for natural gas accumulation,and the Tarim Basin is a part of this region.

关键词： Tethys Northern Margin basin tectonic evolution type of basin accumulation of natural gas.

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Middle Triassic post-orogenic extension on Hainan Island: Chronology and geochemistry constraints of bimodal intrusive rocks

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Science China Earth Sciences 2013年第3期56卷 783-793页

作者： TANG LiMei CHEN HanLin DONG ChuanWan YANG ShuFeng SHEN ZhongYue cheng xiaogan FU LuLu Department of Earth Science Zhejiang University Key Laboratory of Submarine Geosciences Second Institute of Oceanography State Oceanic Administration

This work studies new petrological and geochemical data and zircon U-Pb ages for bimodal intrusive rocks from Xinglong re- gion, Hainan Island. Zircon U-Pb dating yields mean 238U/26pb ages of 238 ± 2 Ma and 234±2 Ma for diabasic and granitic phases, respectively, representing the Middle Triassic emplacement. The diabase and granite bodies were formed from discrete mafic and acidic magma sources that experienced local mechanical mixing at their mutual contacts. Although SiO2 content of intrusions is bimodal, trace element ratios indicate that both were formed in a post-orogenic extensional setting. Sr-Nd isotopic composition reflects a shared EMII type enriched mantle source component, possibly influenced by subduction-fluid metaso- matism.

关键词： bimodal intrusive rocks middle Triassic post-orogenic Hainan Island

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Deformation features and tectonic transfer of the Gumubiezi Fault in the northwestern margin of Tarim Basin, NW China

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Petroleum Exploration and Development 2020年第4期47卷 753-761页

作者： PARIDIGULI Busuke XIE Huiwen cheng xiaogan WU Chao ZHANG Yuqing XU Zhenping LIN Xiubin CHEN Hanlin School of Earth Sciences Zhejiang UniversityHangzhou 310012China Research Center for Structures in Oil and Gas Bearing Basins Ministry of EducationHangzhou 310012China Exploration and Development Research Institute of PetroChina Tarim Oilfield Company Korla 841000China

Through field geologic survey,fine interpretation of seismic reflection data and analysis of well drilling data,the differential deformation,tectonic transfer and controlling factors of the differential deformation of the Gumubiezi Fault(GF)from east to west have been studied *** study shows that GF started to move southward as a compressive decollement along the Miocene gypsum-bearing mudstone layer in the Jidike Formation at the Early Quaternary and thrust out of the ground surface at the northern margin of the Wensu Uplift,and the Gumubiezi anticline formed on the hanging wall of the *** displacement of the GF decreases gradually from 1.21 km in the east AA′transect to 0.39 km in the west CC′transect,and completely disappears in the west of the Gumubiezi *** part of the displacement of the GF is converted into the forward thrust,and another part is absorbed by Gumubiezi *** formation of the GF is related to the gypsum-bearing mudstone layer in the Jidike Formation and barrier of the Wensu *** differential deformation of the GF from east to west is controlled by the development difference of gypsum-bearing mudstone layer in the Jidike *** the east part,gypsum-bearing mudstone layer in the Jidike Formation is thicker,the deformation of the duplex structure in the north of the profile transferred to the basin along gypsum-bearing mudstone layer;to the west of the Gumubiezi structural belt(GSB),the gypsum-bearing mudstone layer in Jidike Formation decreases in thickness,and the transfer quantity of deformation of the duplex structure along the gypsum-bearing mudstone layer to the basin gradually *** contrast,on the west DD′profile,the gypsum-bearing mudstone is not developed,the deformation of the deep duplex structure cannot be transferred along the Jidike Formation into the basin,the deep thrust fault broke to the surface and the GF disappeared *** displacement of the GF to the west eventually

关键词： Tarim Basin Wushi Sag Gumubiezi Fault deformation feature tectonic transfer deformation mechanism

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Magma flow inferred from magnetic fabrics in Wanning gabbro pluton and diabase dykes, Hainan

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Chinese Science Bulletin 2012年第22期57卷 1982-1989页

作者： PAN XiaoQing SHEN ZhongYue DONG ChuanWan CHEN HanLin cheng xiaogan YANG ShuFeng ZHANG ZhiLiang Department of Earth Sciences Zhejiang UniversityHangzhou 310027China

Measurements of anisotropy of magnetic susceptibility (AMS) were performed on a gabbro pluton and 7 diabase dykes in the Wanning area, southeast Hainan Island. Rock magnetism showed that pseudo-single domain (PSD) to multidomain (MD) Ti-poor magnetite carries the magnetic fabric in the gabbro pluton whereas MD Ti-poor magnetite carries the magnetic fabric in the diabase dykes. The corrected anisotropy degree (Pj ) in most specimens was found to be less than 1.2 which is indicative of a possible flow-related magnetic fabric. The AMS eigenvectors within each site are generally well grouped. The maximum susceptibility axes (K1 ) of the gabbro pluton are inclined towards the north at low angles (< 30°). K1 axes of the diabase dykes are inclined towards the NNW and SSE with dip angles of ≤ 30°. From this study, it appears that the emplacement mode of the gabbro pluton was characterized by intrusion from the north to the south at a low angle whereas the diabase dykes were emplaced from the NNW to the SSE at low to moderate angles. This was verified by comparison of the rock fabric to the magnetic fabric. All of this evidence leads to the conclusion that the Wanning gabbro pluton and diabase dykes were the products of pulsative intrusion from the same magma chamber in the area far to the north of Wanning, which suggests that basic rocks may exist beneath the Indosin- ian granite in the area to the north of Wanning.

关键词：辉长岩体辉绿岩岩浆流海南岛面料磁化率各向异性磁性岩石磁学

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Migration of paleo-uplift in southwestern Tarim Basin and its implications for orogenesis and reservoir development, NW China

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Petroleum Exploration and Development 2023年第1期50卷 99-110页

作者： YAN Jiakai CHEN Hanlin cheng xiaogan CHEN Yongquan ZENG Changmin CHEN Cai WU Hongxiang School of Earth Sciences Zhejiang UniversityHangzhou 310058China Research Center for Structures in Oil and Gas Bearing Basins Ministry of EducationHangzhou 310058China Exploration and Development Research Institute of Petro China Tarim Oilfield Company Korla 841000China

Based on well horizon calibration,the typical seismic profiles in southwestern Tarim Basin were interpreted systematically,regional geological sections were established,and the regional denudation thickness of each tectonic period was *** this basis,the plane morphology maps of ancient structures of the Cambrian pre-salt dolomites in different periods were compiled,and the spatial distribution,development,evolution and migration of paleo-uplift in the late Early Paleozoic were *** the late Early Paleozoic,there existed a unified regional paleo-uplift widely distributed in southwestern Tarim Basin,which is called the southwestern Tarim ***“Tarim SW paleo-uplift”and“Hetian paleo-uplift”proposed in previous literatures are not independent,but the result of the spatio-temporal migration and evolution of the southwestern Tarim paleo-uplift identified in this *** southwestern Tarim paleo-uplift emerged at the end of Middle Ordovician,and took its initial shape with increased amplitude in the Late *** the Silurian,the southwestern Tarim paleo-uplift rose steadily and expanded rapidly to the east,incorporating Pishan-Hetian and other areas,with the structural high locating in the Pishan-Hetian *** the Devonian,the southwestern Tarim paleo-uplift began to shrink gradually,to a limited range in the Pishan-Hetian area in the southern part of the *** the Carboniferous,the southwestern Tarim paleo-uplift became an underwater uplift,that is,the paleo-uplift gradually died *** southwestern Tarim paleo-uplift belongs to the forebulge of the southwestern Tarim foreland basin in the late Early Paleozoic,and its formation and evolution are related to the early Paleozoic orogeny of the West Kunlun orogenic belt in the south of the Tarim *** migration of the southwestern Tarim paleo-uplift from the northwestern part of the southwestern Tarim Basin to the Pishan-Hetian area indicates the early Paleozoic orogenic

关键词： paleo-uplift denudation planar morphology of ancient structure spatio-temporal migration Early Paleozoic orogeny southwestern Tarim Basin

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浅部滑脱层沿走向的厚度与性质差异对变形影响的物理模拟研究:对乌什和库车褶皱冲断带的启示

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地质学报 2020年第6期94卷 1763-1779页

作者：龙毅陈汉林程晓敢林秀斌张耀成亚浙江大学地球科学学院杭州310027 教育部含油气盆地构造研究中心杭州310027 浙江省地震局杭州310013

在褶皱冲断带的构造变形中,滑脱层是影响变形的主要控制因素之一。塔里木盆地北缘的乌什和库车褶皱冲断带的构造变形主要受到深浅两套滑脱层的控制,且浅部滑脱层沿走向存在厚度和性质差异。本文采用物理模拟研究方法,结合乌什和库车褶... 详细信息

在褶皱冲断带的构造变形中,滑脱层是影响变形的主要控制因素之一。塔里木盆地北缘的乌什和库车褶皱冲断带的构造变形主要受到深浅两套滑脱层的控制,且浅部滑脱层沿走向存在厚度和性质差异。本文采用物理模拟研究方法,结合乌什和库车褶皱冲断带的地质背景,设计了4组实验模型,研究双滑脱层模型中浅部滑脱层沿走向的厚度与性质差异对褶皱冲断带变形的影响。实验中用微玻璃珠模拟页岩、泥岩等脆性滑脱层,用硅胶模拟盐岩、膏盐岩等韧性滑脱层。实验模型共铺设两套滑脱层,其中基底滑脱层为均匀分布的脆性滑脱层,而浅部滑脱层沿走向存在厚度和性质差异。实验结果表明:在双滑脱层模型中,浅部滑脱层沿走向的厚度与性质差异对褶皱冲断带的构造变形及楔体坡度值具有重要的控制作用。具体表现为:①当浅部滑脱层沿走向存在厚度差异时,浅部滑脱层较薄一侧的变形制约较厚一侧的变形传递,导致模型整体变形前锋的传递距离较近,且模型两侧的变形前锋的扩展范围基本一致。较薄一侧的断层发育数量明显比较厚一侧的数量多、间距小,且楔体坡度值自较薄一侧向较厚一侧逐渐减小。②当浅部滑脱层沿走向存在性质差异时,浅部脆性滑脱层一侧表现为上下一体的变形,而韧性滑脱层一侧表现为上下分层变形。在两侧浅部滑脱层厚度一致的情况下,韧性滑脱层一侧的传播速度总体快于脆性滑脱层一侧,但两者的最终传递距离趋于一致,楔体坡度值从脆性滑脱层一侧向韧性滑脱层一侧逐渐减小;当浅部脆性滑脱层的厚度减小时,随着缩短量的持续增加,模型两侧变形前锋的传递距离仍然具有趋于一致特点,且模型的楔体坡度值整体偏大,但脆性滑脱层一侧的楔体坡度值始终大于韧性滑脱层一侧。此外,模拟结果验证了在乌什和库车褶皱冲断带中,浅部滑脱层沿走向的性质差异是造成构造样式差异的主要控制因素,但并不一定是造成该冲断带变形前锋发生大规模偏转的根本原因。

关键词：物理模拟浅部滑脱层厚度差异性质差异褶皱冲断带

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