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Sm-Nd,Pb-Pb and Rb-Sr Isotopic Dating and Its Dynamic Implications for the Proterozoic Augen Granite in the Yunkai Area,Western Guangdong Province

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Acta Geologica Sinica(English Edition) 2000年第2期74卷 289-296页

作者： peng songbai ZHANG Yeming ZHAN Mingguo CHEN Fuwen QIU Ruizhao Yichang Institute of Geology and Mineral Resources CAGSYichang 443003Hubei

The samples of ductile-rheologic deformational augen granite from the Yunkai uplift area, western Guangdong province, were determined by the whole-rock Sm-Nd, Pb-Pb and Rb-Sr isotopic dating to have an Sm-Nd isochron age of 1414±68 Ma, a Pb-Pb isochron age of 1388±90 Ma and a Rb-Sr isochron age of 490±36 Ma. The first two ages are interpreted as the formation age of this suite of granite and the last age represents the timing of the tectono-thermal event of Caledonian ductile-rheologic shear partial melting. It is indicated that in the study area not only an orogeny took place in the Caledonian, but also a more important tectono-magmatic activity occurred in the Meso-proterozoic there, which may be related to the subduction-collision between the Yangtze block and Cathaysia block.

关键词： Yunkai area Proterozoic augen granite isotopic dating ductile-rheologic shear

Petrogenesis and Geotectonic Significance of Early-Neoproterzoic Olivine-Gabbro within the Yangtze Craton: Constrains from the Mineral Composition, U-Pb Age and Hf Isotopes of Zircons

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Journal of Earth Science 2018年第1期29卷 93-102页

作者： Xingfu Jiang songbai peng Timothy M.Kusky Lu Wang Hao Deng School of Earth Sciences East China University of Technology School of Earth Sciences China University of Geosciences Center for Global Tectonics China University of Geosciences State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Three Gorges Center for Geohazard Ministry of Education China University of Geosciences

The olivine-gabbroic rocks located at the Huangiing anticline within the Yangtze Craton are dated at circa 857-854 Ma by LA-ICP-MS method. The rocks belong to the sub-alkaline series and consist of pyroxene （35%-40%）, plagioclase （40% -45%）, olivine （8%-10%） and spinel （3%-5%）. Olivine has Fo values of 73-83 that is classified as chrysolite. Pyroxene has relative low contents of FeO （6.60 wt.%-8.23 wt.%） but high CaO （20.23 wt.%-21.25 wt.%） contents, however, plagioclase has high A1203 （31.78 wt.%o-32.37 wt.%）, CaO （16.08 wt.%-16.25 wt.%） and An （79-80） values, but low Na20 contents （1.95 wt.%-2.11 wt.%）. Spinel are magnesioferrite with characteristics of high contents of MgO （13.65 wt.%- 13.68 wt.%）, FeO （23.27 wt.%-23.40 wt.%） and A1203 （62.43 wt.%-62.74 wt.%）. Chemical compositions of these minerals are similar to those of gabbro rocks that were formed in the post-orogeny environment. The olivine-gabbro samples have negative zircon eHf values （-16.57±0.47） that resemble the mafic rocks in the same region, indicating that they are derived from the extremely enriched mantle source. On the compilation of documented Neoproterozoic mafic rocks in the Yangtze Craton, it is proposed that the mantle in the northern Yangtze Craton has experienced different degrees enrichment during the Neoproterozoic.

关键词： Neoproterozoic olivine-gabbro Huangling anticline post-orogeny environment Yangtze Craton.

Application of the modern ophiolite concept with special reference to Precambrian ophiolites

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Science China Earth Sciences 2011年第3期54卷 315-341页

作者： Timothy M. KUSKY WANG Lu Yildirim DILEK Paul ROBINSON peng songbai HUANG XuYa State Key Lab for Geological Processes and Mineral Resources Three Gorges Research Center for Geohazards Ministry of Education China University of Geosciences Wuhan 430074 China Department of Geology Miami University Oxford OH 45056 USA Department of Earth Sciences Dalhousie University Halifax Nova Scotia Canada

Much has been learned in the past 40 years about the great diversity of the internal structure and geochemical compositions of Phanerozoic ophiolites, indicating that these on-land fragments of ancient oceanic lithosphere formed in distinctly different tectonic settings during their igneous evolution. Recent studies in Archean and Proterozoic greenstone belts have shown that the Precambrian rock record may also include exposures of a diverse suite of ophiolite complexes as part of craton development in the early history of the Earth. We review the salient features of the Precambrian ophiolite record to highlight what has been learned about Precambrian oceanic spreading systems since the original Penrose definition of ophiolites in 1972. Some of the diagnostic, characteristic, typical, and rare aspects of ophiolites of all ages are presented in a table in order to help determine if tectonically deformed and metamophosed sequences in Precambrian shield areas may be considered as ophiolites. The results of this comparative study are important in that they enable researchers to more realistically characterize allochthonous mafic/ultramafic rock sequences as ophiolitic or non-ophiolitic. This approach is more deterministic in contrast to some other arbitrary classification schemes requiring three or four of the Penrose-style ophiolitic units to be present in the Precambrian record for a specific rock sequence to be considered ophiolitic. Once these tectonic fragments are recognized as remnants of ancient oceanic lithosphere, great progress shall be made in understanding early Earth history. We discuss the significance and implications of the Precambrian ophiolite record to constrain the mode and nature of the plate tectonics that operated in deep time.

关键词： ophiolite Precambrian craton greenstone belt

A Paleoproterozoic(Orosirian) Ophiolitic Mélange, North Yangzte Craton

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Acta Geologica Sinica(English Edition) 2016年第S1期90卷 215-216页

作者： HAN Qingsen peng songbai Ali POLAT Timothy KUSKY School of Earth Sciences China University of Geosciences Center for Global Tectonics School of Earth Sciences China University of Geosciences Wuhan 430074 China3.State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Department of Earth and Environmental Sciences University of Windsor

Ophiolites represent fragments of ancient oceanic lithosphere,tectonically incorporated into continental margins during plate subduction or remained in the subduction–collisional orogenic *** provide

关键词： meta Ga A Paleoproterozoic Ophiolitic M Orosirian lange

Discovery and Tectonic Significance of the Early Paleozoic Nuodong Ophiolite in the North-western Yunkai Massif, South China

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Acta Geologica Sinica(English Edition) 2015年第A2期89卷 58-59页

作者： LIU Songfeng peng songbai WU Changfeng LIN Musen School of Geosciences China University of Geosciences Wuhan 430074 China Center for Global Tectonics China University of Geosciences Wuhan 430074 China Western Fujian Geological Team Xiamen 361003 China College of Zijin Minning Fuzhou University Fuzhou 350108 China

In this study we report the Early Paleozoic strongly deformed metabasalt, metadiabase and metapyroxenolite, located in the North-Western YunKai massif, South China,

关键词： PLATE tectonics RESEARCH OPHIOLITES PALEOZOIC Era PYROXENITE IGNEOUS rocks

Lithium polysulfide solvation and speciation in the aprotic lithium-sulfur batteries

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Particuology 2024年第6期89卷 238-245页

作者： Jinhao Zhang Qingshan Fu peng Li Ruibo Linghu Xiaozhong Fan Haibin Lin Juncao Bian songbai Han Gengzhi Sun Long Kong Frontiers Science Center for Flexible Electronics and Xi’an Institute of Flexible Electronics Northwestern Polytechnical UniversityXi’an710129China China Automotive Innovation Corporation Nanjing211100China Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen518055China Institute of Advanced Materials Nanjing Tech UniversityNanjing211816China

Fingerprinting sulfur speciation in aprotic electrolytes is a key to understand fundamental chemistry and design well-performing lithium–sulfur(Li–S)*** polysulfide(LiPS)dissolution and deposition in ether-based electrolytes during redox reactions have been probed and established by spectroscopy and ***,detailed LiPS structure and solvation properties influenced by conventional and newly developed electrolytes remain elusive,which exert fundamental challenges and practical difficulties in decoupling battery performance from electrolyte *** perspective aims to provide timely information to uncover underlying mechanisms that rein in sulfur speciation by considering the charge density of LiPSs and the coordination strength of solvents/*** discussion starts with unlocking the baseline electrolyte formulation to investigate its role in LiPS formation and *** that,the term coordination strength is used instead of donor number and dielectric constant to describe interactions between solvents and LiPSs and to reveal LiPS structure *** work is expected to encourage the discovery of new electrolyte working mechanisms to develop energy-dense and power-intensive Li–S batteries.

关键词： Sulfur speciation Redox kinetics Coordination strength Solvation chemistry Lithium-sulfur batteries

滇西腾冲更新世粗面安山岩Ar-Ar年代学、地球化学特征及其构造意义

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岩石学报 2017年第10期33卷 3137-3146页

作者：林木森彭松柏乔卫涛福州大学紫金矿业学院福州350108 中国地质大学地球科学学院武汉430074 贵州省地质调查院贵阳550004

腾冲芒棒地区广泛发育新近纪以来的火山岩,本文首次对该区粗面安山岩进行的高精度40Ar/39Ar同位素定年,其坪年龄分别为2.1±0.1Ma和2.0±0.1Ma,代表其喷溢时代为早更新世。岩石地球化学特征研究显示,粗面安山岩属高钾钙碱性系列,富集大... 详细信息

腾冲芒棒地区广泛发育新近纪以来的火山岩,本文首次对该区粗面安山岩进行的高精度40Ar/39Ar同位素定年,其坪年龄分别为2.1±0.1Ma和2.0±0.1Ma,代表其喷溢时代为早更新世。岩石地球化学特征研究显示,粗面安山岩属高钾钙碱性系列,富集大离子亲石元素、亏损高场强元素,具有弧火山岩与大陆板内火山岩的双重属性,推测其形成于后造山环境。综合研究表明,腾冲地块更新世火山岩的形成与印度-欧亚板块俯冲-碰撞造山隆升后的伸展垮塌、富集地幔部分熔融作用密切相关,而印支陆块向东南逃逸以及腾冲弧形走滑断裂带(龙川江断裂带、大盈江断裂带)的活化促使了该期火山岩的喷发与侵位。

关键词：腾冲地区粗面安山岩 Ar-Ar年代学更新世构造意义

扬子克拉通古元古代冷俯冲低温-高压榴辉岩相变泥质岩的发现及其大地构造意义

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地球科学 2020年第6期45卷 1986-1998页

作者：韩庆森彭松柏焦淑娟中国地质大学地球科学学院湖北省流域关键带演化重点实验室湖北武汉430074 中国地质大学地球物理与空间信息学院湖北武汉430074 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

首次报道了扬子克拉通黄陵穹隆北部崆岭杂岩古元古代水月寺混杂岩带中发现特征性石榴石-蓝晶石-硬绿泥石组合低温-高压(LT-HP)榴辉岩相变泥质岩,其变质峰期矿物组合为石榴石+蓝晶石+硬绿泥石+多硅白云母+金红石+石英.相平衡模拟计算得... 详细信息

首次报道了扬子克拉通黄陵穹隆北部崆岭杂岩古元古代水月寺混杂岩带中发现特征性石榴石-蓝晶石-硬绿泥石组合低温-高压(LT-HP)榴辉岩相变泥质岩,其变质峰期矿物组合为石榴石+蓝晶石+硬绿泥石+多硅白云母+金红石+石英.相平衡模拟计算得到一条近等温减压的顺时针型变质P-T轨迹,其峰期变质条件为571~576℃,19.2~21.8 ***-MS锆石U-Pb年代学研究获得变泥质岩中碎屑锆石核部年龄集中于2.1~2.2 Ga,变质增生边年龄为1 991±20 ***-Cld组合榴辉岩相变泥质岩原岩形成构造环境和变质峰期条件指示,其形成于较低地温梯度(d T/d P≈300°C/GPa)下的活动大陆边缘冷俯冲构造环境,进一步表明至少从古元古代开始具有"冷俯冲"构造特征的现代板块构造体制已经启动.

关键词：扬子克拉通古元古代水月寺混杂岩带低温-高压榴辉岩相石榴石-蓝晶石-硬绿泥石组合冷俯冲构造折返

扬子克拉通黄陵背斜南部~860 Ma岩墙的成因及地质意义

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地球科学 2021年第6期46卷 2117-2132页

作者：蒋幸福彭松柏韩庆森东华理工大学地球科学学院核资源与环境国家重点实验室江西南昌330013 中国地质大学地球科学学院湖北武汉430074 中国地质大学全球大地构造中心湖北武汉430074

首次报道了扬子克拉通黄陵背斜南部由辉绿岩脉、花岗闪长岩脉和正长花岗岩脉组成的新元古代早期小型岩墙.辉绿岩脉和花岗闪长岩脉的锆石U-Pb定年结果分别为856±6.4 Ma和860±6.0 Ma.全岩主量和微量元素数据显示岩墙中辉绿岩具有高Pb含... 详细信息

首次报道了扬子克拉通黄陵背斜南部由辉绿岩脉、花岗闪长岩脉和正长花岗岩脉组成的新元古代早期小型岩墙.辉绿岩脉和花岗闪长岩脉的锆石U-Pb定年结果分别为856±6.4 Ma和860±6.0 Ma.全岩主量和微量元素数据显示岩墙中辉绿岩具有高Pb含量,且Ba/Nb和La/Nb比值变化较大,而花岗闪长岩脉和正长花岗岩脉样品的Y和Nb含量较低,结合继承性锆石年龄分布特征,暗示岩墙形成过程中遭受了不同程度的年轻岛弧地壳物质混染.黄陵南部~860 Ma小型岩墙的发现,表明扬子克拉通在早于该时期已进入后碰撞的伸展构造环境.综合区域已有资料,认为扬子克拉通前寒武纪基底的裂解在时空上均表现出较大差异.

关键词：扬子克拉通黄陵背斜南部 ~860 Ma岩墙新生地壳混染伸展构造环境岩石学