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Thermal evolution and dynamic mechanism of the Sichuan Basin during the Early Permian-Middle Triassic

Science China Earth Sciences 2011年第12期54卷 1948-1954页

作者： HE LiJuan xu hehua WANG JiYang State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China CAS Key Laboratory of the Marginal Sea Geology South China Sea Institute of Oceanology Chinese Academy of Sciences Guangzhou 510301 China

The Sichuan Basin, located in the western margin of Yangtze Plate, is one of the important oil-gas-bearing basins in China. During the Early Permian-Middle Triassic, the Sichuan Basin experienced regional lithospheric extension and Emeishan basalt activities, both of which influenced the basin development and thermal evolution. Here we simulated the thermal effects of lithospheric extension and the Emeishan mantle plume based on different geodynamical models. Modeling results indicated that the lithospheric temperature together with the basement heat flow was generally increasing with time due to extension. As the stretching factor was relatively small, the thinning of lithosphere, and consequently the thermal disturbance, was not great. The lithospheric extension yielded about 20% increase of the basement heat flow, with maximum value of 60?62 mW m?2 in the Early Triassic. Mantle plume model shows that the thermal evolution of the inner zone above the plume head was influenced greatly by plume activity. But the outer zone and its outside area where the Sichuan Basin is located were affected only slightly. The basalts that had erupted in the southwestern basin might disturb the basin temperature significantly, although shortly and locally. Generally, the thermal history of the Sichuan basin during the Early Permian-Middle Triassic was controlled by the lithospheric extension, but locally it superimposed thermal effects of basalt activities in its southwestern area.

关键词： tectono-thermal evolution numerical modeling lithospheric extension Emeishan basalt Sichuan Basin

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The deep thermal structure of the lithosphere in the northwestern South China Sea and its control on the shallow tectonics

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Science China Earth Sciences 2021年第6期64卷 962-976页

作者： Xiaofang WANG Haibo HUANG hehua xu Ziqiang REN Jiazheng ZHANG Zhongxian ZHAO Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyInnovation Academy of South China Sea Ecology and Environmental EngineeringChinese Academy of SciencesGuangzhou511458China Southern Marine Science and Engineering Guangdong Laboratory Guangzhou511458China

The northwestern sub-basin of South China Sea(SCS)is a unique tectonic unit formed in the early spreading of the *** northwestern Sub-basin has a series of complex geological structures such as seamounts and fault zones surrounded by the Xisha Trough,the Zhongsha Massif,and the Pearl River *** extensional structures and magmatic activity in the northwestern sub-basin are closely related to the lithospheric structure and its ***,details of the deep lithosphere structure are still poorly ***,we obtained detailed data of water and Moho depth using sonar buoys,Extended Spread Profiles(ESP),Ocean Bottom Seismometer(OBS),both Multi-beam and land-sea joint seismic surveys in the northwestern sub-basin and its surrounding *** we adopted a thermal isostasy method to calculate the depth of the Lithosphere-Asthenosphere Boundary(LAB)in the northwestern sub-basin of the SCS and its surrounding *** show that the range of LAB depth is~25–110 *** shallowest burial depth is 25–60 km occurring in the ocean *** depth increases to 60–110 km toward the continental *** lithospheric structure on the north and south sides of the Xisha Trough is symmetrical and shows the deep structure and thermal features of aborted *** LAB depth in the Zhongsha Trough and the Zhongsha Massif increased from 60 to 70 km southwestwards,consistent with the trend of surface *** LAB depth to the west side of the Pearl River Valley is 60–80 km,and the thinning of the lithosphere is related to the distribution of faults,depressions and the magmatic *** LAB depth in the northwestern sub-basin and the eastern subbasin is less than 60 km with the thinnest part being less than 46 *** ocean drilling,seismic investigation,and seafloor topography,we show that the ocean basin of the northwestern sub-basin of the SCS locates within the 46 km isobath of the *** formation of the rifted valleys and discrete blocks s

关键词： Northwestern sub-basin of SCS Thermal isostasy Ocean-continent transition zone Thickness of lithosphere

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Dynamics Analysis of the Baiyun Sag in the Pearl River Mouth Basin,North of the South China Sea

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Acta Geologica Sinica(English Edition) 2008年第1期82卷 73-83页

作者： SUN Zhen ZHONG Zhihong ZHOU Di PANG Xiong HUANG Chunju CHEN Changmin HE Min xu hehua CAS Key Laboratory of Marginal Sea Geology South China Sea Institute of Oceanology Guangzhou Guangdong 510301 Department of Technology Shenzhen Branch of CNOOC Guangzhou Guangdong 510240

The Baiyun sag is a deep one developing on the slope of the Pearl River Mouth Basin. It occurs as a composite graben horizontally, and is composed of two sub-sags versus one low uplift. Vertically, the sedimentary architecture could be divided into three layers, i.e. the faulted layer on the bottom, the faulted-ductile stretching layer in the middle and the draping layer on the top. The main rifting stage of the sag is supposed to be characterized by ductile extension and thinning of the crust. The special deformation pattern is probably attributed to the fact that the Baiyun sag is located in the transfer zone of the pre-existing weak zone, which made the sag a strongly deformed area, characterized by the greatly thinned lithosphere and active magmatism. The highly rising mantle under the Baiyun sag should be an important mechanism responsible for the ductile deformation, which caused partial melting of the upper mantle. Upweiling to the upper crust and the sedimentary layers, the partial melting materials accommodated extensional strain and caused non-faulted vertical subsidence. Magma was collected under the transfer zone after the first stage of rifting, and transferred laterally in a direction perpendicular to the extension to the ENE and WSW parts of the sag and upwelled along the NW-trending basal faults, where WNW-trending shear faults developed in swarms. The faulting activity and sedimentation history of the Baiyun sag may have been affected by the ocean ridge jump around 24 Ma and the cessation of sea floor spreading around 16 Ma.

关键词： Baiyun sag dynamics analysis transfer zone ductile extension

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Estimation of effectivity permeability of reservoirs based on mixed bond-site percolation

Estimation of effectivity permeability of reservoirs based o...

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中国地球物理学会第二十九届年会

作者： Wan Juying xu hehua Shu Weibing Key Laboratory of Marginal Sea Geology of Chinese Academy of Sciences South China Sea Institute of Oceanology University of Chinese Academy of Sciences University of Chinese Academy of Sciences

＜正＞Because of the lack of data, reservoir characterization is very uncertain. The relationship between the reservoir connectivity and permeability estimation is of great importance especially for Petroleum Engineers. The conventional method to solve this is to build a number of possible reservoirs models, upscale them, and then run flow simulation, which is much computationally expensive

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Bottom water temperature measurements in the South China Sea,eastern Indian Ocean and western Pacific Ocean

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热带海洋学报 2018年第5期37卷 86-97页

作者： YANG Xiaoqiu SHI Xiaobin ZHAO Junfeng YU Chuanhai GAO Hongfang CHEN Aihua LU Yuanzheng CEN Xianrong LIN Weiren ZENG Xin xu hehua REN Ziqiang ZHOU Shengqi xu Ziying SUN Jinlong KAMIYA Nana LIN Jian CAS Key Laboratory of Ocean and Marginal Sea Geology South China Sea Institute of OceanologyGuangzhou 510301China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Marine Mineral Resources Ministry of Land and Resources Guangzhou Marine Geological Survey Guangzhou 510075 China State Key Laboratory of Tropical Oceanography South China Sea Institute of Oceanology Chinese Academy of SciencesGuangzhou 510301 China Graduate School of Engineering Kyoto University Kyoto 615-8540 Japan

文章报道了一批新的海底底水温度(BWT)数据,其中南海(SCS)158个站位、东印度洋(EIO)30个站位及西太平洋(WPO)37个站位。基于这批新的BWT数据,获得南海和西太平洋海域底水温度与水深经验关系,可为地球物理和物理海洋提供准确、可靠的海... 详细信息

文章报道了一批新的海底底水温度(BWT)数据,其中南海(SCS)158个站位、东印度洋(EIO)30个站位及西太平洋(WPO)37个站位。基于这批新的BWT数据,获得南海和西太平洋海域底水温度与水深经验关系,可为地球物理和物理海洋提供准确、可靠的海底温度边界。这将有助于海底油气资源调查与评估。同时,这批实测数据表明:1)水深超过3500m的海域,其底水温度在南海约为2.47℃,比东印度洋(～1.34℃)和西太平洋(～1.60℃)稍微偏高。这与大洋传送带模式所预测的情况比较吻合。该模式认为:低温高盐的海水,从北大西洋格陵兰岛和冰岛附近海域下沉到深层,然后向南流动,再与南极洲周围海域的低温高盐海水一同向北进入印度洋和太平洋。而南海是一个相对比较封闭的热带边缘海,其内部海水与印度洋和菲律宾海交换有限,导致海水温度整体高于印度洋和太平洋。2)台西南盆地水深在2700～3000m的部分站位,其底水温高达约3.00℃,明显高于其周边同水深海域底水温度(平均值约为2.33℃)。这可能是台西南盆地海底水热活动导致的结果。3)在东印度洋和西太平洋水深超过4800m海域,底水温度随着水压增大稍有升高,其升高率分别为10.6mK·MPa^(-1)和12.0mK·MPa^(-1)。这与理论估算的深层底水绝热压力温度梯度范围较为吻合。这也意味着东印度洋和西太平洋深层底水,主要由绝热自压作用导致其温度随着深度的增大而升高。

关键词：海底底水温度(BWT) 南海(SCS) 东印度洋(EIO) 西太平洋(WPO) 大洋传送带模式

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马尼拉俯冲带相变与地震成因机制研究

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地质科学 2014年第3期49卷 924-934页

作者：陈爱华许鹤华广州海洋地质调查局国土资源部海底矿产资源重点实验室广州510075 中国科学院南海海洋研究所中国科学院边缘海地质重点实验室广州510301

根据马尼拉俯冲带的地球物理资料,选取3条典型剖面,模拟马尼拉俯冲板块的热结构,分析俯冲板块的相变过程,探讨马尼拉俯冲带的地震成因机制。结果表明:1)B—B′剖面约在95 km深度时,洋壳开始进入榴辉岩相,C—C′剖面洋壳在160 km进人榴... 详细信息

根据马尼拉俯冲带的地球物理资料,选取3条典型剖面,模拟马尼拉俯冲板块的热结构,分析俯冲板块的相变过程,探讨马尼拉俯冲带的地震成因机制。结果表明:1)B—B′剖面约在95 km深度时,洋壳开始进入榴辉岩相,C—C′剖面洋壳在160 km进人榴辉岩相;2)马尼拉俯冲带中部的地震活动倾向发生在100 km以上,南部的地震活动分布深度更深;3)马尼拉俯冲带的俯冲板块发生撕裂,使断离以下俯冲板块不容易发生地震活动,影响深源地震的发生。

关键词：地震相变马尼拉撕裂

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南海海盆扩张机制的动力学模拟

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海洋地质与第四纪地质 2016年第2期36卷 75-83页

作者：李延真许鹤华中国科学院边缘海地质重点实验室南海海洋研究所广州510301 中国科学院大学北京100049

南海处于印度—澳大利亚、欧亚和太平洋三大板块汇聚中心,地理位置独特,地质作用复杂,经历了拉张、张裂到海底扩张的演化过程,是水平拉张和地幔上涌共同作用下的被动扩张结构。以南海中央海盆的地质构造为背景建立二维有限元模型,对具... 详细信息

南海处于印度—澳大利亚、欧亚和太平洋三大板块汇聚中心,地理位置独特,地质作用复杂,经历了拉张、张裂到海底扩张的演化过程,是水平拉张和地幔上涌共同作用下的被动扩张结构。以南海中央海盆的地质构造为背景建立二维有限元模型,对具有先存薄弱带情况下岩石圈在水平拉张力和上涌力共同作用下的减薄扩张情况进行动力学模拟。计算结果表明:(1)岩石圈在受到拉张作用时,薄弱带和断层的存在会使该区域发生应力集中,优先减薄破坏;(2)岩石圈在单纯的拉张力条件下很难发生破坏,如果同时施加一个较小地幔上涌力反而能引起较大的变形,说明地幔上涌力在海盆扩张中起着重要的作用;(3)由于下地壳的流变性,下地壳比上地壳发生了更大程度的减薄,而且下地壳的流变特性比薄弱带的存在更有助于海盆的扩张。

关键词：拉张力减薄破坏扩张数值模拟南海

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前陆盆地构造-热演化:以龙门山前陆盆地为例

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地学前缘 2017年第3期24卷 127-136页

作者：何丽娟许鹤华刘琼颖中国科学院地质与地球物理研究所岩石圈演化国家重点实验室北京100029 中国科学院边缘海地质重点实验室中国科学院南海海洋研究所广东广州510301

前陆盆地油气资源丰富但构造变形十分复杂,使得前陆盆地构造-热演化模拟面临挑战。前陆盆地演化过程中构造与热的耦合体现在多个层面:岩石圈热演化对岩石圈强度时空分布及其挠曲的影响;逆冲推覆作用的浅部温度效应;快速沉积作用对盆地... 详细信息

前陆盆地油气资源丰富但构造变形十分复杂,使得前陆盆地构造-热演化模拟面临挑战。前陆盆地演化过程中构造与热的耦合体现在多个层面:岩石圈热演化对岩石圈强度时空分布及其挠曲的影响;逆冲推覆作用的浅部温度效应;快速沉积作用对盆地温度场的影响等。首先,前陆盆地形成时的岩石圈热背景及其造成的岩石圈强度空间变化对盆地后期的演化具有重要影响。同时早期热事件的热扰动也会叠加在前陆盆地的构造-热演化过程中,并不断衰减,影响岩石圈的流变结构,从而带来一系列的影响。热与构造演化相耦合在前陆盆地定量模拟中非常重要。其次,还需特别关注岩石圈深部过程与近地表构造过程的耦合。造山带逆冲推覆、抬升和剥蚀是与前陆盆地形成相关的重要构造活动,这种运动引起的热对流对造山带的热结构、前陆逆冲带以及前渊地区的温度场的分布有着重要影响。最后,前陆盆地形成演化过程中的快速沉积作用对盆地温度场和地表热流产生强烈的压制作用,对前陆盆地浅部热演化的影响不容忽视。因此,在浅部热演化(包括造山带逆冲推覆、快速沉积压实等)与盆地下伏岩石圈挠曲、深部热演化的联合作用下,使得前陆盆地构造-热演化颇为复杂,二者的耦合使得前陆盆地构造-热演化模拟颇具挑战。

关键词：前陆盆地构造-热演化岩石圈有效弹性厚度数值模拟

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The relationship between acceptance of illness and quality of life among men who have sex with men living with human immunodeficiency virus:A cross-sectional study

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International Journal of Nursing Sciences 2022年第3期9卷 313-320页

作者： Chang Gao xueling Xiao Li Zhang hehua xu Min Wang Honghong Wang Xiangya School of Nursing Central South UniversityChangshaHunanChina Nursing Department Handan Central HospitalHandanHebeiChina The First Affiliated Hospital of Zhengzhou University ZhengzhouHenanChina The Institute of HIV/AIDS The First Hospital in ChangshaChangshaHunanChina

Objectives To explore the relationship between acceptance of illness and quality of life(QOL),and factors associated with acceptance of illness among men who have sex with men(MSM)living with human immunodeficiency virus(HIV).Methods Three hundred and one MSM were recruited from an HIV clinic between August and December *** battery of measurements consisted of the Acceptance of Illness Scale,World Health Organization Quality of Life Questionnaire for HIV brief version,HIV Cognitive Appraisal Scale and a self-designed questionnaire used to collect general *** correlation test was used to examine the relationship between acceptance of illness and *** and multivariate ordinal logistic regression analyses were used to examine whether the general data(demographic and HIV-related clinical data)and HIV cognitive appraisal were associated with acceptance of illness *** Descriptive analysis showed the acceptance level among MSM living with HIV was moderate(Mean=26.29,SD=5.28).Those with a better acceptance of illness had a better QOL(r=0.69,P<0.01).In the multivariate ordinal logistic regression model,education level,threat appraisals(OR:1.09;95%CI[1.06–1.13]),and controllability appraisals(OR:0.82;95%CI[0.71–0.94])were significantly associated with acceptance of *** Results showed acceptance level was moderate and had a positive correlation with *** level of education,low threat appraisals and high controllability appraisals were related to high illness *** finding highlights the importance of focusing on HIV-infected MSM with low education and on their perceptions of threat and controllability about HIV-related issues when designing interventions to promote illness acceptance in this vulnerable population.

关键词： Acceptance of illness Cognitive appraisal HIV infections Male homosexuality Quality of life Sexual and gender minorities Vulnerable populations

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断裂带同震温度负异常机制分析

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地球物理学报 2020年第4期63卷 1422-1430页

作者：杨小秋林為人葉恩肇许鹤华徐子英中国科学院边缘海与大洋地质重点实验室南海海洋研究所广州510301 中国科学院南海生态环境工程创新研究院广州510301 南方海洋科学与工程广东省实验室(广州) 广州511458 Graduate School of Engineering Kyoto UniversityKyoto 615-8540Japan Kochi Institute for Core Sample Research Japan Agency for Marine-Earth Science and TechnologyNankokuKochi 783-8502Japan 台湾师范大学地球科学系中国台北11677 自然资源部海底矿产资源重点实验室广州海洋地质调查局广州510075

断裂带同震温度响应,可在震后钻孔测温中获得并识别,为发震断层摩擦特性与发震机制等基础研究提供了非常独特的思路和有效手段.集集、汶川及日本东北大地震后,实施了台湾车笼埔断层钻探项目(TCDP)、汶川地震断裂带科学钻探工程(WFSD)和... 详细信息

断裂带同震温度响应,可在震后钻孔测温中获得并识别,为发震断层摩擦特性与发震机制等基础研究提供了非常独特的思路和有效手段.集集、汶川及日本东北大地震后,实施了台湾车笼埔断层钻探项目(TCDP)、汶川地震断裂带科学钻探工程(WFSD)和日本海沟快速钻探计划(JFAST).钻孔测温结果表明:滑移面上下5~20m范围内存在温度正异常,这是同震摩擦生热所致,该机制已被广泛认识和接受;同时,距滑移面20~60m范围内也存在明显的温度负异常,但其成因机制几乎还未被真正关注和认识.虽然温度负异常峰值只有正异常峰值的1/4~1/3,但温度负异常分布范围却是正异常分布范围的3~4倍,即正、负温度异常区对应的总能量基本相当.因此,断裂带震后钻孔测温中的负异常及其成因不容忽视.在详细分析几种可能的同震温度负异常机制后(如岩层热物性分布差异、流体运移、表面自由能增大及同震应力释放),发现能在理论、实验及野外观测上都得到支撑的普适性机制只有同震应力释放.这可能是断裂带震后温度负异常的主要原因.

关键词：同震温度响应机制应力释放表面自由能摩擦生热集集地震汶川地震日本东北地震

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