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青藏高原南羌塘荣玛晚侏罗世闪长岩:班公湖——怒江特提斯洋向北俯冲产物 被引量:5
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作者 冉皞 王根厚 +2 位作者 梁晓 郑艺龙 久米多吉 《地质通报》 CAS CSCD 北大核心 2015年第5期815-825,共11页
班公湖—怒江特提斯洋的演化一直以来备受关注,对于其俯冲极性存在不同认识。报道在青藏高原南羌塘荣玛地区新发现的晚侏罗世闪长岩年代学、地球化学和锆石Hf同位素特征。LA-MC-ICP-MS锆石U-Pb年龄结果表明,岩石形成于149.7±0.8Ma... 班公湖—怒江特提斯洋的演化一直以来备受关注,对于其俯冲极性存在不同认识。报道在青藏高原南羌塘荣玛地区新发现的晚侏罗世闪长岩年代学、地球化学和锆石Hf同位素特征。LA-MC-ICP-MS锆石U-Pb年龄结果表明,岩石形成于149.7±0.8Ma,时代为晚侏罗世。岩石呈富碱,低Mg O、TFe O、Ca O,富集轻稀土元素和Rb、Th、U、K等元素,亏损Ta、Nb、P、Ti等元素。锆石εHf(t)值为正值,并且具有较大的变化范围(+4.26^+9.29),指示岩浆来源于幔源和壳源岩浆的混合。结合区域地质背景认为,荣玛地区晚侏罗世闪长岩为班公湖—怒江特提斯洋向北俯冲所引起的幔源和壳源岩浆混合作用的产物。 展开更多
关键词 晚侏罗世 南羌塘 班公湖—怒江特提斯洋 闪长岩 LA-MC-ICP-MS锆石U-Pb年龄
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The copper polymetallic deposits and resource potential in the Tibet Plateau 被引量:7
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作者 Ju-xing Tang Huan-huan Yang +15 位作者 Yang Song Li-qiang Wang Zhi-bo Liu Bao-long Li Bin Lin Bo Peng Gen-hou Wang Qing-gao Zeng Qin Wang Wei Chen Nan Wang Zhi-jun Li Yu-bin Li Yan-bo Li Hai-feng Li Chuan-yang Lei 《China Geology》 2021年第1期1-16,共16页
Many large and super-large copper deposits have been discovered and explored in the Tibet Plateau,which makes it the most important copper resource reserve and development base in China.Based on the work of the resear... Many large and super-large copper deposits have been discovered and explored in the Tibet Plateau,which makes it the most important copper resource reserve and development base in China.Based on the work of the research team,the paper summarizes the geological characteristics of the main copper deposits in Tibet and puts forward a further prospecting direction.A series of large accumulated metal deposits or ore districts from subduction of Tethys oceanic crust to India-Asia collisionhave been discovered,such as Duolong Cu(Au)ore district and Jiama copper polymetallic deposit.The ore deposits in the Duolong ore district are located in the lowstand domain,the top of lowstand domain,and the highstand domain of the same magmatic-hydrothermal metallogenic system,and their relative positions are the indicators for related deposits in the Bangong Co-Nujiang metallogenic belt.The polycentric metallogenic model of the Jiama copper polymetallic deposit is an important inspiration for the exploration of the porphyry mineralization related to collision orogeny.Further mineral exploration in the Tibet Plateau should be focused on the continental volcanic rocks related to porphyry-epithermal deposits,orogenic gold deposits,hydrothermal Pb-Zn deposits related to nappe structures,skarn Cu(Au)and polymetallic deposits,and the Miocene W-Sn polymetallic deposits. 展开更多
关键词 Porphyry-epithermal-skarn Cu deposit Gangdese metallogenic belt bangong co-nujiang metallogenic belt Resource potential tethys ocean Mineral exploration engineering Tibet Plateau
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