中国大陆科学钻探工程卫星孔 CCSDPP6 钻孔橄榄岩岩石学研究   总被引：1，自引：0，他引：1  

任玉峰杨经绥  张仲明李天福 《地质学报》2007,81(7):1004-1016

中国大陆科学钻探工程卫星孔PP6钻孔位于苏鲁超高压变质带的山东荣成滕家集马草夼橄榄岩体中。该橄榄岩出露于元古代花岗闪长片麻岩中,面积为300m×130m。地表岩石风化强烈,钻孔内岩石新鲜,劈理发育。孔深196m,橄榄岩厚度约110m,下部为花岗闪长片麻岩。橄榄岩主体呈块状构造,边缘呈条带状构造,靠近片麻岩的橄榄岩蛇纹石化强烈。除了10cm厚的岩脉原岩为岩浆分异的产物外,岩石主元素、微量和稀土元素地球化学显示,原岩为极亏损的地幔方辉橄榄岩。岩石主要矿物组成为橄榄石(85%~95%) 斜方辉石(3%~5%) 角闪石(3%~5%) 尖晶石(约0.5%) 镍硫化物(<0.1%),个别部位含有石榴石、单斜辉石和白云石。根据矿物的结构和成分,大体分为三个期次的组合。早期残余地幔矿物组合,由镁橄榄石、富铝顽火辉石、铬尖晶石和透辉石组成,具残余斑状结构,常含有包体,为高温低压组合;超高压变质期矿物组合,由镁橄榄石、镁铝榴石(Pyr=62~66)、低铝顽火辉石、铬尖晶石组成,具细粒变晶结构,无包体,变质温压为840~940°C、3.0~4.1GPa;麻粒岩相─角闪岩相变质期矿物组合,包括韭闪石、镁铝尖晶石、铬尖晶石、白云石、透闪石、蛇纹石,变质温度和压力为650~780℃、<1.8GPa。马草夼橄榄岩作为地幔楔,在印支期发生了超高压变质作用,并在折返过程中叠加了麻粒岩相-角闪岩相的变质作用。  相似文献   

Multi-stage melting processes of ophiolitic chromitites from Purang Peridotite, the Western Yarlung-Zangbo Suture Zone, Tibet     

XIONG Fahui  YANG Jingsui  Paul T ROBINSON  XU Xiangzhen 《《地质学报》英文版》2018,92(Z2):35-35

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Petrology of Cr-rich Ophiolitic Chromitites of Bulqiza, Eastern Ophiolitic Belt, Albania     

XIONG Fahui  YANG Jingsui  Paul T. ROBINSON  Yildirim DILEK  MILUSHI Ibrahim  XU Xiangzhen  ZHANG Zhongming  ZHOU Wen  CHEN Yanhong  HUANG Zhu  LAI Shengming  ZHANG Lan 《《地质学报》英文版》2015,89(Z2):102-102

<正>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  相似文献   

The Discovery of Diamonds in Chromitite of the Hegenshan Ophiolite, Inner     

HUANG Zhu  YANG Jingsui  ZHU Yongwang  XIONG Fahui  LIU Zhao  ZHANG Zhongming  XU Wei 《《地质学报》英文版》2015,89(Z2):32-32

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Early Stages Arc Volcanism in the Eastern Himalayan Synstaxis, Yarlung Zongbo Suture Zone, Tibet, China: New Zircon Age, Hf Isotopic, Geochemical Constrains and Implication for the Tectonic Evolution History of Neo-Tethys     

LI Yuan  YANG Jingsui  XU Zhiqin  DONG Hanwen  LIU Zhao  ZHANG Jian 《《地质学报》英文版》2015,89(Z2):43-43

<正>The Yarlung Zongbo Suture Zone(YZSZ)is thought to be the most important geological boundary,the collision between the India plate and the Eurasia happened since Cretaceous-Tertiary(Aitchison et al.,2011).The YZSZ,bordered to the north by the Lhasa Block and to the south by the Tethyan sedimentary sequence and the Greater  相似文献   

拉萨地体内松多榴辉岩的同碰撞折返:来自构造变形和40Ar-39Ar年代学的证据          下载免费PDF全文

李化启  许志琴  杨经绥  唐哲民  杨梅 《地学前缘》2011,18(3):66-78

松多地区的区域构造变形与糜棱质白云母石英片岩和绿片岩的白云母单矿物40Ar-39Ar年代学测试表明拉萨地体内的松多地区于220～240 Ma经历过印支期碰撞造山事件.这次造山事件为晚二叠世松多榴辉岩带代表的古特提斯洋盆消失闭合之后北拉萨地体与南冈瓦那大陆碰撞的结果.该区榴辉岩与退变榴辉岩白云母和角闪石的40Ar-39A...  相似文献   

Petrological studies of Jilang eclogite and constraints on the subduction and exhumation processes of the Paleo-Tethys oceanic crust     

SHEN Tingting  ZHANG Cong  TIAN Zuolin  LI Yang  YANG Jingsui 《《地质学报》英文版》2018,92(Z2):27-27

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Diamond in oceanic peridotites and chromitites: Evidence for deep recycled mantle in the global ophiolite record     

YANG Jingsui  Paul ROBINSON  XU Xiangzhen  XIONG Fahui  LIAN Dongyang 《《地质学报》英文版》2018,92(Z2):42-42

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The metamorphic evolution and tectonic significance of the eclogite in the Sumdo Complex, Tibet, China     

ZHANG Cong  Thomas BADER  Herman VAN ROERMUND  YANG Jingsui 《《地质学报》英文版》2018,92(Z2):45-45

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Discovery of a CaIrO3-type Al2O3 phase that implies crust-mantle recycling in ophiolite-hosted corundum from the Luobusa ophiolite, Tibet     

Fahui Xiong  Xiangzhen Xu  Jingsui Yang  Richard Wirth  Yildirim Dilek 《《地质学报》英文版》2018,92(Z1):166-166

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