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Plate tectonic control on the formation and tectonic migration of Cenozoic basins in northern margin of the South China Sea 被引量:18
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作者 Pengcheng Wang Sanzhong Li +7 位作者 yanhui suo Lingli Guo Guangzeng Wang Gege Hui M.Santosh Ian D.Somerville Xianzhi Cao Yang Li 《Geoscience Frontiers》 SCIE CAS CSCD 2020年第4期1231-1251,共21页
The tectonic evolution history of the South China Sea(SCS) is important for understanding the interaction between the Pacific Tectonic Domain and the Tethyan Tectonic Domain,as well as the regional tectonics and geody... The tectonic evolution history of the South China Sea(SCS) is important for understanding the interaction between the Pacific Tectonic Domain and the Tethyan Tectonic Domain,as well as the regional tectonics and geodynamics during the multi-plate convergence in the Cenozoic.Several Cenozoic basins formed in the northern margin of the SCS,which preserve the sedimentary tectonic records of the opening of the SCS.Due to the spatial non-uniformity among different basins,a systematic study on the various basins in the northern margin of the SCS constituting the Northern Cenozoic Basin Group(NCBG) is essential.Here we present results from a detailed evaluation of the spatial-temporal migration of the boundary faults and primary unconformities to unravel the mechanism of formation of the NCBG.The NCBG is composed of the Beibu Gulf Basin(BBGB),Qiongdongnan Basin(QDNB),Pearl River Mouth Basin(PRMB) and Taixinan Basin(TXNB).Based on seismic profiles and gravity-magnetic anomalies,we confirm that the NE-striking onshore boundary faults propagated into the northern margin of the SCS.Combining the fault slip rate,fault combination and a comparison of the unconformities in different basins,we identify NE-striking rift composed of two-stage rifting events in the NCBG:an early-stage rifting(from the Paleocene to the Early Oligocene) and a late-stage rifting(from the Late Eocene to the beginning of the Miocene).Spatially only the late-stage faults occurs in the western part of the NCBG(the BBGB,the QDNB and the western PRMB),but the early-stage rifting is distributed in the whole NCBG.Temporally,the early-stage rifting can be subdivided into three phases which show an eastward migration,resulting in the same trend of the primary unconformities and peak faulting within the NCBG.The late-stage rifting is subdivided into two phases,which took place simultaneously in different basins.The first and second phase of the early-stage rifting is related to back-arc extension of the Pacific subduction retreat system.The third phase of the earlystage rifting resulted from the joint effect of slab-pull force due to southward subduction of the proto-SCS and the back-arc extension of the Pacific subduction retreat system.In addition,the first phase of the late-stage faulting corresponds with the combined effect of the post-collision extension along the Red River Fault and slab-pull force of the proto-SCS subduction.The second phase of the late-stage faulting fits well with the sinistral faulting of the Red River Fault in response to the Indochina Block escape tectonics and the slab-pull force of the proto-SCS. 展开更多
关键词 Northern Cenozoic basin group South China Sea NE-Striking fault Tectonic migration Pacific Plate Tethyan tectonic domain
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Plume interaction and mantle heterogeneity:A geochemical perspective 被引量:1
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作者 Zhen Zhang Sanzhong Li +5 位作者 Guangzeng Wang Xiyao Li Gang Wang yanhui suo M.Santosh Lingli Guo 《Geoscience Frontiers》 SCIE CAS CSCD 2020年第5期1571-1579,共9页
Mantle plumes originating from the Core-Mantle Boundary(CMB)or the Mantle Transition Zone(MTZ)play an important role in material transfer through Earth’s interior.The hotspot-related plumes originate through differen... Mantle plumes originating from the Core-Mantle Boundary(CMB)or the Mantle Transition Zone(MTZ)play an important role in material transfer through Earth’s interior.The hotspot-related plumes originate through different mechanisms and have diverse processes of material transfer.Both the Morganian plumes and large low shear wave velocity provinces(LLSVPs)are derived from the D"layer in the CMB,whereas the Andersonian plumes originate from the upper mantle.All plumes have a plume head at the Moho,although the LLSVPs have an additional plume head at the MTZ.We compare the geochemical characteristics of various plumes in an attempt to evaluate the material exchange between the plumes and mantle layers.The D"layer,the LLSVPs and the Morganian plumes are consisted of subducted slab and post-perovskite from the lower mantle.Bridgmanite would crystallize during the upwelling process of the LLSVPs and the Morganian plumes in the lower mantle,and the residual is a basalt-trachyte suite.Unlike the Morganian plumes,the crystallization in the LLSVPs is insufficient that material accumulates beneath the MTZ to form a plume head.Typically,the secondary plumes above the plume head occur at the edge of the LLSVPs because it is easier for bridgmanite crystal separating from the plume head at the edge,and the residual material with low density upwells to form the secondary plumes.Meanwhile,Na and K are enriched during the long-term crystallization process,and then the basalt-phonolite suite appears in the LLSVPs.The geochemical characteristics of Andersonian plumes suggest that the basalt-rhyolite suite is the major component in the upper mantle.Meanwhile the basalt-rhyolite suite also appears in the LLSVPs and the Morganian plumes because of the assimilation and contamination in the plume head beneath the Mono. 展开更多
关键词 Mantle plumes Mantle components Geochemical process
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碳构造:一个地球系统科学新范式 被引量:10
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作者 李三忠 刘丽军 +13 位作者 索艳慧 李玺瑶 周洁 姜兆霞 管红香 孙国正 于雷 刘鹏 戴黎明 李晓辉 陈龙 赵彦彦 王誉桦 许博超 《科学通报》 EI CAS CSCD 北大核心 2023年第4期309-338,共30页
地球系统科学是一门复杂性科学,迄今没有一个简单理论完整解释地球系统行为.碳构造既是地球系统运行的一种新模式,也是一种研究新范式,其基本构成有碳泵、碳传送带及碳开关.碳泵是跨圈层物质能量垂向交换机制,碳传送带则是同一圈层内的... 地球系统科学是一门复杂性科学,迄今没有一个简单理论完整解释地球系统行为.碳构造既是地球系统运行的一种新模式,也是一种研究新范式,其基本构成有碳泵、碳传送带及碳开关.碳泵是跨圈层物质能量垂向交换机制,碳传送带则是同一圈层内的水平输送机制,碳开关控制着地球系统运行状态和进化方向.碳构造是多学科研究地球系统的突破口和交叉点. 展开更多
关键词 多学科研究 地球系统科学 开关控制 交换机制 进化方向 复杂性科学 传送带 物质能量
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氢构造与海底氢能系统
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作者 李三忠 索艳慧 +1 位作者 姜兆霞 吴立新 《科学通报》 EI CAS 2024年第32期4696-4703,共8页
氢元素是宇宙大爆炸之初融合形成的首个元素,广泛存在于宇宙中,构成了宇宙质量的75%,是恒星核聚变的原材料.其同位素有气、氛、氙,其中,失去电子的气原子核即氢离子或质子.质子是生命利用的最小能量形式。氢气是氢元素的气体分子形式,... 氢元素是宇宙大爆炸之初融合形成的首个元素,广泛存在于宇宙中,构成了宇宙质量的75%,是恒星核聚变的原材料.其同位素有气、氛、氙,其中,失去电子的气原子核即氢离子或质子.质子是生命利用的最小能量形式。氢气是氢元素的气体分子形式,可燃烧或极易与氧气反应直接生成水,是高效燃烧、绿色环保、清洁的能源,是氢能的一种。 展开更多
关键词 氧气反应 宇宙大爆炸 氢元素 氢离子 最小能量 高效燃烧 绿色环保 气体分子
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西太平洋中生代板块俯冲过程与东亚洋陆过渡带构造-岩浆响应 被引量:74
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作者 李三忠 索艳慧 +11 位作者 李玺瑶 王永明 曹现志 王鹏程 郭玲莉 于胜尧 兰浩圆 李少俊 赵淑娟 周在征 张臻 张国伟 《科学通报》 EI CAS CSCD 北大核心 2018年第16期1550-1593,共44页
中生代期间,华北与华南地块受西太平洋的板块俯冲过程、东亚大陆边缘深浅部过程的影响,其构造、岩浆、成矿、地貌演化趋势表现出一些共性,但也存在显著差异,其动力机制一般认为由古太平洋板块俯冲所致,但是它们是如何关联的,长期未得到... 中生代期间,华北与华南地块受西太平洋的板块俯冲过程、东亚大陆边缘深浅部过程的影响,其构造、岩浆、成矿、地貌演化趋势表现出一些共性,但也存在显著差异,其动力机制一般认为由古太平洋板块俯冲所致,但是它们是如何关联的,长期未得到解决,是地质研究的难点和热点,存在巨大争论.本文系统评述了近十年来已有东亚大陆边缘的构造变形分析、岩浆岩年代学、层析成像等多学科成就,简要探讨了前燕山期的中国陆块的最终聚合、统一陆缘的形成,随后主要侧重综述侏罗纪、白垩纪东亚洋陆过渡带燕山期地质过程的新认识.本文将浅部构造变形规律、岩浆岩年龄分带和迁移、地形巨大反转,与深部过程紧密结合,提出:华北克拉通破坏过程总体受深部岩石圈早幕向西的分层回卷拆沉、减薄制约,导致早期构造、岩浆作用伴随西迁,中幕多向拆沉,晚幕拆沉向东回撤;同时,北部鄂霍茨克洋闭合与南部班公湖-怒江俯冲系统的同期联合作用使得东亚洋陆过渡带总体处于挤压背景下,且深部上涌的软流圈不断向东跃迁,带动岩石圈不断向东、幕式、交替性伸展和挤压.华南深部早期则经历了向西平板俯冲,导致变形和岩浆作用西迁;后期发生两幕拆沉,导致构造-岩浆作用向东跃迁.总之,华北与华南构造-岩浆差异的内因是深部过程,外因是东亚大汇聚的差异所致. 展开更多
关键词 洋陆过渡带 古太平洋板块 东亚 燕山期 大陆边缘 俯冲后撤
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Plate boundary processes of the Caroline Plate 被引量:2
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作者 Zhen ZHANG Sanzhong LI +3 位作者 Guangzeng WANG yanhui suo Gang WANG Pengcheng WANG 《Science China Earth Sciences》 SCIE EI CAS CSCD 2022年第8期1554-1567,共14页
The tectonic evolution of the Caroline Plate during the Oligocene to Early Miocene was mainly controlled by two fulcrums.The west fulcrum at Palau Island remained fixed during 29-25 Ma as the Ayu Trough rifted and pro... The tectonic evolution of the Caroline Plate during the Oligocene to Early Miocene was mainly controlled by two fulcrums.The west fulcrum at Palau Island remained fixed during 29-25 Ma as the Ayu Trough rifted and produced the abyssal hills parallel to its boundaries,and the Pacific Plate and part of the Caroline Plate subducted to the north.At the northeast corner of the Caroline Plate,the east fulcrum is surrounded by a series of arc seamount chains.These chains resulted from the convergence between the Caroline Plate and the Pacific Plate and crustal softening of the northeastern Caroline Plate induced by the Caroline Hotspot at~25 Ma.This softening of the crust also led to the dysfunction of the east fulcrum,and the west fulcrum migrated south,which caused dextral motion along the Ayu Rift and the development of an en echelon structure.The Yap Trench was a part of the spreading center in the Parece-Vela Rift at~29 Ma.However,sinistral motion along the Parece-Vela Rift at around 20-15 Ma led to the exposure of the subducted Yap Trench and left a triangular region with distinctive geophysical characteristics in the surrounding area. 展开更多
关键词 Caroline Plate Yap Trench Plate boundary Seamount chain
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Linkage between reactivation of the sinistral strike-slip faults and 28 September 2018 Mw7.5 Palu earthquake, Indonesia 被引量:1
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作者 Gege Hui Sanzhong Li +3 位作者 Pengcheng Wang yanhui suo Qian Wang Ian D.Somerville 《Science Bulletin》 SCIE EI CAS CSCD 2018年第24期1635-1640,共6页
On September 28, 2018, a Mw7.5 earthquake occurred near Sulawesi, Indonesia as a result of strike-slip faulting at shallow depth within the interior of the Molucca Sea Microplate that forms a part of the broader Sunda... On September 28, 2018, a Mw7.5 earthquake occurred near Sulawesi, Indonesia as a result of strike-slip faulting at shallow depth within the interior of the Molucca Sea Microplate that forms a part of the broader Sunda Plate. Focal mechanism solutions and distribution for the earthquakes indicate rupture occurred on a left-lateral NNW-SSE-to N-S-striking fault. This region has been characterized by complex tectonics in which motions of numerous small microplates are accommodating large-scale convergence between the Australia, Sunda, Pacific and Philippine Sea plates. In this paper, the Coulomb stress calculation verified the WNW-, nearly E-W-trending sinistral strike slip receiver fault in Sulawesi, which is consistent with the giant sinisterly strike-slip fault system across New Guinea, Pacific Tectonic System and the Tethys Tectonic System caused by the oblique convergence. The result has been reconciled within the modern GPS velocity field. 展开更多
关键词 Palu EARTHQUAKE FAULT REACTIVATION MICROPLATE CONVERGENCE Sinistral stress-field
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