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2014年中国地球科学联合学术年会——专题62：深部探测技术与实验－科学钻探与地球化学基准

作者： Fahui Xiong Jingsui Yang paul t.robinson Yildirim Dilek Ibrahim Milushi Xiangzhen Xu Zhongming Zhang Wenda Zhou Yanhong Chen Zhu Huang Shengming Lai Lan Zhang CARMA State Key Laboratory for Continental Tectonics and DynamicsInstitute of GeologyChinese Academy of Geological Sciences Department of Geology& Environmental Earth Science 116 Shideler Hall Miami University OxfordOH 45056 Institute of Geosciences EnergyWater and EnvironmentPolytechnic University of TIRANA Faculty of Earth Sciences China University of Geoscience School of Earth Science and Mineral Resources China University of Geosciences

the ultramafic massif of Bulqiza, which belongs to the eastern ophiolitic belt of Albania, is the most important area for metallurgical chromitite ores. the massif consists of a thick(>4 km) rock sequence, with a generalized profile from the bottom to the top as follows. the tectonite sequence composed mainly of harzburgites with subordinate intercalations of dunites, where only scarce refractory chromitites occur within basal clinopyroxene-bearing harzburgites, while abundant podiform chromitites of metallurgical type are hosted by middle-upper harzburgites. the transitional zone entirely composed of dunites with layered metallurgical chromitites;and, finally, the magmatic sequence composed of wehrlites, pyroxenites, troctolites and gabbros with scarce refractory chromitite occurrence. Several authors carried out studies of the petrological, mineralogical and structural features of the Bulqiza chromite deposits. the upper mantle and crustal units of the Bulqiza Ophiolite show major changes in thickness, rock types, and chemical compositions from west to east as a result of its complex evolution in a suprasubduction zone(SSZ) environment. these peridotites display numerous evidences of mantle metasomatism at various scales. Minerlogy of olivine, clinopyroxene, orthopyroxene and spinel show that they are formed as forearc peridotite. the composition of the melts gradually changed toward boninite due to melt–peridotite reaction. Both the massive and disseminated chromitites are high – Cr number(cr#=70-80). Disseminated chromitites show systematic changes in olivine and magnesiochromite compositions from the dunite envelope to the massive ore, indicating melt-rock reaction. Composition of orthopyroxene change between core and rim indicate melt interaction with cr and al element. textural features such as the incongruent melting of orthopyroxenes and interstitial spinels, olivines and pyroxenes suggest that mantle metasomatism has affected the Bulqiza massif. these proc

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雅鲁藏布江缝合带西段普兰和东波蛇绿岩:一种大陆边缘型蛇绿岩

雅鲁藏布江缝合带西段普兰和东波蛇绿岩:一种大陆边缘型蛇绿岩

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2014年中国地球科学联合学术年会——专题62：深部探测技术与实验－科学钻探与地球化学基准

作者：刘飞杨经绥 Yildirim Dilek 许志琴 paul t.robinson 连东洋徐向珍周文达中国地质科学院地质研究所地幔研究中心大陆构造与动力学国家重点实验室 Department of Geology Miami UniversityOxfordOH45056USA 中国地质大学地球科学学院

西藏南部的雅鲁藏布江缝合带(YZSZ)长度大于2000km,被普遍认为是印度和欧亚板块的构造边界。几个面积较大的蛇绿岩块(东波、普兰、当穷和休古嘎布)断续分布在YZSZ西段,代表了印度—亚洲板块碰撞之前新特提斯大洋岩石圈的残余。东波和普...

西藏南部的雅鲁藏布江缝合带(YZSZ)长度大于2000km,被普遍认为是印度和欧亚板块的构造边界。几个面积较大的蛇绿岩块(东波、普兰、当穷和休古嘎布)断续分布在YZSZ西段,代表了印度—亚洲板块碰撞之前新特提斯大洋岩石圈的残余。东波和普兰蛇绿岩出露海山型层序,从下到上包括:地幔橄榄岩、基性岩脉、块状玄武质熔岩和火山角砾岩、泥页岩、放射虫硅质岩(局部夹玄武岩熔岩)、

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豆荚状铬铁矿成因的新模式

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地质学报 2013年第S1期 17-17页

作者：熊发挥杨经绥 paul t.robinson 郭国林刘钊陈松永徐向珍李源大陆构造与动力学国家重点实验室中国地质科学院地质研究所核资源与环境省部共建国家重点实验室培育基地(东华理工大学) 中国地质大学(北京)地球科学与资源学院

豆荚状铬铁矿以及地幔橄榄岩中发现大量的异常地幔矿物,引起了各国地质学家对豆荚状铬铁矿成因的新一轮思考。地幔橄榄岩和铬铁矿为什么会成为异常矿物群的载体,铬铁矿的成因是否一定是浅成?还是经历了浅成(SSZ/MOR)和深成(>300km)两个... 详细信息

豆荚状铬铁矿以及地幔橄榄岩中发现大量的异常地幔矿物,引起了各国地质学家对豆荚状铬铁矿成因的新一轮思考。地幔橄榄岩和铬铁矿为什么会成为异常矿物群的载体,铬铁矿的成因是否一定是浅成?还是经历了浅成(SSZ/MOR)和深成(>300km)两个阶段?两阶段的印记如何识别与区分?各自有什么特征?

关键词：豆荚状铬铁矿模式超高压矿物罗布莎

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Evidence supporting the relationship between maternal asthma and risk for autism spectrum disorders

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Neural Regeneration Research 2025年第4期20卷 1101-1102页

作者： Hadley Osman paul Ashwood Department of Medical Microbiology and Immunology and the M.I.N.D.InstituteUniversity of California at DavisSacramentoCAUSA

During pregnancy,maternal immune activation(MIA),due to infection,chronic inflammatory disorders,or toxic exposures,can result in lasting health impacts on the developing *** has been associated with an increased risk of neurodevelopmental disorders,such as autism spectrum disorder(ASD)in the *** is characterized by increased repetitive and stereotyped behaviors and decreased *** of 2020,1 in 36 children are diagnosed with ASD by the age of 8 years,with ASD rates continuing to increase in prevalence in USA(tamayo et al.,2023).Post-mortem brain studies,biomarker and transcriptomic studies,and epidemiology studies have provided compelling evidence of immune dysregulation in the circulation and brain of individuals diagnosed with ***,the etiology of ASD is largely unknown,however,genetic components and environmental factors can contribute to increased *** allergic asthma(MAA),a form of MIA,has been identified as a potential risk factor for developing neurodevelopmental disorders(Patel et al.,2020).Asthma is a chronic inflammatory condition driven by a t-helper type(tH)2 immune response.

关键词： disorders epidemiology fetus

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Dur’ngoi Ophiolite in East Kunlun, Northeast tibetan Plateau: Evidence for Paleo-tethyan Suture in Northwest China

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Journal of China University of Geosciences 2009年第2期20卷 303-331页

作者：杨经绥史仁灯吴才来王希斌 paul t.robinson Key Laboratory for Continental Dynamics of the Ministry of Land and Resources Institute of GeologyChinese Academy of Geological Sciences Department of Earth Sciences Dalhousie University

the A＇nyemaqen （阿尼玛卿） ophiolite belt along the southern margin of the East Kunlun （昆仑） Mountains marks the suture formed by the closure of paleo-tethys. the Dur＇ngoi ophiolite in the eastern part of this belt consists of meta-peridotite, mafic-ultramafic cumulates, sheeted dikes and basaltic lavas. the meta-peridotites consist of dunite, harzburgite, lherzolite, feldspar-bearing lherzolite and garnet-bearing lherzolite and contain residual spinel with Cr# [100×Cr/（Cr＋Al）] ranging from 30 to 57 and Mg# [100×Mg/（Mg＋Fe2＋）] ranging from 50 to 75, indicating an Al- and Mg-rich series. the meta-peridotites have a relatively narrow range of composition with Mg# of 89.2-92.6, Al2O3 contents of （1-4） wt.% and slightly depleted chondrite normalized REE patterns, indicating that they represent relict mantle material that has undergone intermediate to low degrees of partial melting. Garnets in the lherzolite are andradite, enriched in Ca and Fe and depleted in Mg and AI （And=95-97, Pyr=0.3-5, Gro=0-3）, indicating a metamorphic origin. the cumulate rocks mainly consist of dunite, wehrlite, pyroxenite and gabbro. A well-layered gabbro-pyroxenite complex is defined by modal variations in plagioclase and pyroxene. Blocks of garnet-pyroxenite or rodingite are locally present in the meta-peridotites. Garnets in the cumulate rocks are grossular （Gro=69-90, And=9-19, Br=l-12）, also metamorphic origin. the diabase dikes are moderately depleted in LREE [（La/Sm）N=0.5-0.8] and HREE resulting in slightly convex chondrite-normalized patterns with slightly positive Eu anomalies （δEu=1.1-1.3）. the basaltic lavas have REE patterns similar to those of MORB with （La/Sm）N ratios of 0.5-1 and small negative Eu anomalies. they appear to have been derived from a depleted mantle source and to have undergone little or no differentiation during crystallization. SHRIMP U-Pb dating of zircons from the basalts yields 286pb/238U ages of 276-319 Ma （average 308.0±4.9 Ma）. the Dur＇ngoi ophiolite is interprete

关键词： ophiolite Dur'ngoi A'nyemaqen East Kunlun tibet.

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Foreword

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Journal of China University of Geosciences 2009年第2期20卷 205-208页

作者：杨经绥李海兵 paul t.robinson Key Laboratory for Continental Dynamics of the Ministry of Land and Resouces Institute of GeologyChinese Academy of Geological Sciences Department of Earth Sciences Dalhousie University

the Qinghai-tibet plateau is a fast uplifting area that constitutes the world＇s highest and thickest, and newest piece of continental plate which has unusual geometric configurations and landscapes. the Qinghai-tibet plateau consists of multiple terranes, with a complex geological history, including the evo- lution of the tethys Ocean basin, the convergence of terranes and island arcs, multiple subductions, multiple collisions and multiple orogens, over a long period of action of continental dynamic processes. Before the Indian and the Asian plates collided, during the Early Paleozoic, it was already a large orogen and terrane collision complex. As a result of the collision of the Indian and Asian plates, the fast uplift of Qinghai- tibet plateau became the most magnificent event on the earth during the Cenozoic. It formed a vast, seemingly boundless high plateau with borders consisting of mountain chains with very high peaks, and steep gorges.

关键词： Foreword HPM high SiO ICP

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Diamonds and Other Exotic Minerals Recovered from Peridotites of the Dangqiong Ophiolite, Western Yarlung-Zangbo Suture Zone, tibet

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Acta Geologica Sinica(English Edition) 2016年第2期90卷 425-439页

作者： XIONG Fahui YANG Jingsui robinson paul t. XU Xiangzhen BA Dengzhu LI Yuan ZHANG Zhongming RONG He CARMA State Key Laboratory for Continental Tectonics and Dynamics Institute of Geology Chinese Academy of Geological Sciences

Various combinations of diamond, moissanite, zircon, quartz, corundum, rutile, titanite, almandine garnet, kyanite, and andalusite have been recovered from the Dangqiong peridotites. More than 80 grains of diamond have been recovered, most of which are pale yellow to reddish-orange to colorless. the grains are all 100-200 μm in size and mostly anhedral, but with a range of morphologies including elongated, octahedral and subhedral varieties. their identification was confirmed by a characteristic shift in the Raman spectra between 1325 cm^-1 and 1333 cm^-1, mostly at 1331.51 cm^-1 or 1326.96 cm^-1. Integration of the mineralogical, petrological and geochemical data for the Dongqiong peridotites suggests a multi-stage formation for this body and similar ophiolites in the Yarlung-Zangbo suture zone. Chromian spinel grains and perhaps small bodies of chromitite crystallized at various depths in the upper mantle, and encapsulated the UHP, highly reduced and crustal minerals. Some oceanic crustal slabs containing the chromian spinel and their inclusion were later trapped in suprasubduction zones（SSZ）, where they were modified by island arc tholeiitic and boninitic magmas, thus changing the chromian spinel compositions and depositing chromitite ores in melt channels.

关键词： diamond Multi-stage formation Dangqiong ophiolite Yarlung-Zangbo suture zone

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Geological Evidence does not Support a Shallow Origin for Diamonds in Ophiolite

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Acta Geologica Sinica(English Edition) 2020年第S01期94卷 70-72页

作者： YANG Jingsui LIAN Dongyang paul t.robinson QIU tian XIONG Fahui WU Weiwei School of Earth Sciences and Engineering Nanjing UniversityNanjing 210023China Center for Advanced Research on Mantle(CARMA) Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China College of Marine Science and technology China University of GeosciencesWuhan 430074China

Farré-de-Pablo et al.(2018)report a new occurrence of in situ microdiamonds enclosed in chromite from ophiolitic chromitite pods hosted in the tehuitzingo serpentinite of southern *** discovery enlarges the number of occurrence of the ophiolite-hosted microdiamonds to 7 countries in the world,including India(Das,2015,2017),Albania(Xiong et al.,2017;Wu et al.,2017),turkey(Lian et al.,2017),Myanmar(Chen et al.,2018),Russia(Yang et al.,2015),and China(Bai et al.,1993;Xu et al.,2009).the microdiamonds occur in ophiolitic podiform chromitites and peridotites,and are generally interpreted as UHP phases formed at pressures>4 GPa(Yang et al.,2014;Griffin et al.,2016;Das et al.,2017).However,Farré-de-Pablo et al.(2018)conclude that the tehuitzingo diamonds were formed under low-temperature and low-pressure conditions during serpentinization,which challenges the current knowledge of diamond ***,we discuss several lines of evidence that do not support the authors’conclusion.

关键词： diamonds in ophiolite serpentinization chemical vapor deposition UHP crystallization

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Distinctive melt activity and chromite mineralization in Luobusa and Purang ophiolites, southern tibet: constraints from trace element compositions of chromite and olivine

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Science Bulletin 2019年第2期64卷 108-121页

作者： Benxun Su Meifu Zhou Jiejun Jing paul t. robinson Chen Chen Yan Xiao Xia Liu Rendeng Shi Davide Lenaz Yan Hu Key Laboratory of Mineral Resources Institute of Geology and Geophysics Chinese Academy of Sciences University of Chinese Academy of Sciences Institutions of Earth Science Chinese Academy of Sciences Department of Earth Sciences The University of Hong Kong State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Key Laboratory of Continental Collision and Plateau Uplift Institute of Tibetan Plateau Research Chinese Academy of Sciences Department of Mathematics and Geosciences University of Trieste Department of Earth and Space Sciences University of Washington

to investigate the factors controlling the mineralization in ophiolites we systematically compared the petrology and mineral compositions of the harzburgites/lherzolites, dunites and chromitites in the Luobusa and Purang ophiolites. Generally, the petrological features and trace element compositions of chromite and olivine in peridotite and chromitite are distinctly different between the two *** Luobusa, boninitic melts are inferred to have interacted with the harzburgites and modified the distributions of some trace elements(e.g., Ni, Mn and V) in chromite and olivine. the subsequently formed dunites and chromitites experienced significant elemental exchange. In contrast, the Purang ophiolite contains a wider range of chromitite compositions and records diverse melt activities, such as the growth of relatively abundant secondary clinopyroxene. the metasomatic melts were enriched in Al and depleted in Si, Na and highly incompatible trace elements(e.g., Nb, Zr). Such melts resemble MORBlike melts proposed in the literature but are assumed to be more hydrous than typical MORB because of presence of hydrous minerals. the parental magmas of the Purang dunites and intermediate chromitites are inferred to be compositionally intermediate between boninitic and MORB-like melts. In addition,the more refractory nature of the Luobusa harzburgites facilitated a high Cr concentration gradient with the interacting melts, making it easier to increase Cr in the melts. Crystallization of clinopyroxene and amphibole in the Purang ophiolite accommodated significant amounts of Cr and water, respectively,and negatively affected Cr concentration and chromite crystallization. the concentration of chromite to form chromitites requires the presence of focused melt channels.

关键词： Chromite Olivine Ophiolite trace element tibet

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Diamonds Discovered from High–Cr Podiform Chromitites of Bulqiza,Eastern Mirdita Ophiolite,Albania

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Acta Geologica Sinica(English Edition) 2017年第2期91卷 455-468页

作者： XIONG Fahui YANG Jingsui robinson paul t. DILEK Yildirim MILUSHI Ibrahim XU Xiangzhen ZHOU Wenda ZHANG Zhongming RONG He CARMA Key Laboratory for Continental Tectonics andDynamicsInstitute of GeologyChinese Academy of Geological SciencesBeijing 100037China Department of Geology&Environmental Earth Science 116 Shideler Hall Miami University Oxford 45056 OHUSA Institute of Geosciences EnergyWater and EnvironmentPolytechnic University of TIRANAAlbania Faculty of Earth Sciences China University of GeoscienceWuhan 430074HubeiChina

Various combinations of diamond, moissanite, zircon, corundum, rutile and titanitehave been recovered from the Bulqiza chromitites. More than 10 grains of diamond have been recovered, most of which are pale yellow to reddish–orange to colorless. the grains are all 100–300 μm in size and mostly anhedral, but with a range of morphologies including elongated, octahedral and subhedral varieties. their identification was confirmed by a characteristic shift in the Raman spectra between 1325 cm-1 and 1333 cm-1, mostly at 1331.51 cm-1 or 1326.96 cm-1. this investigation extends the occurrence of diamond and moissanite to the Bulqiza chromitites in the Eastern Mirdita Ophiolite. Integration of the mineralogical, petrological and geochemical data of the Bulqiza chromitites suggests their multi–stage formation. Magnesiochromite grains and perhaps small bodies of chromitite formed at various depths in the upper mantle, and encapsulated the ultra–high pressure, highly reduced and crustal minerals. Some oceanic crustal slabs containing the magnesiochromite and their inclusion were later trapped in suprasubduction zones, where they were modified by tholeiitic and boninitic arc magmas, thus changing the magnesiochromite compositions and depositing chromitite ores in melt channels.

关键词： Diamond Multi–stage formation Bulqiza chromitite Ophiolite Albania Proto-tethys

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