[1]王 浩,李建峰,宋茂双.2020.金鲁地幔橄榄岩地球化学特征及其对泽当蛇绿岩构造演化的指示.大地构造与成矿学,44(6):1226-1225.doi:10.16539/j.ddgzyckx.2020.06.013
 WANG Hao,LI Jianfeng,SONG Maoshuang.2020.Geochemical Characteristics of Jinlu Mantle Peridotite and its Implications for Tectonic Evolution of the Zedang Ophiolite.Geotectonica et Metallogenia,44(6):1226-1225.doi:10.16539/j.ddgzyckx.2020.06.013
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金鲁地幔橄榄岩地球化学特征及其对泽当蛇绿岩构造演化的指示
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《大地构造与成矿学》[ISSN:ISSN 1001-1552/CN:CN 44-1595/P]

卷:
期数:
2020年44卷06期
页码:
1226-1225
栏目:
岩石大地构造与地球化学
出版日期:
2020-12-20

文章信息/Info

Title:
Geochemical Characteristics of Jinlu Mantle Peridotite and its Implications for Tectonic Evolution of the Zedang Ophiolite
文章编号:
1001-1552(2020)06-1226-013
作者:
王 浩1、2 李建峰1* 宋茂双1 邵同宾1 王晓宁1、2 王思猛1、2
1.中国科学院 广州地球化学研究所, 同位素地球化学国家重点实验室, 广东 广州 510640; 2.中国科学院大学, 北京 100049
Author(s):
WANG Hao1、2 LI Jianfeng1* SONG Maoshuang1 SHAO Tongbin1 WANG Xiaoning1、2 and WANG Simeng1、2
1. State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China; 2. University of Chinese Academy of Sciences, Beijing 100049, China
关键词:
地幔橄榄岩 蛇绿岩 地球化学 矿物化学 熔融亏损程度 构造演化
Keywords:
mantle peridotite ophiolite geochemistry chemical composition of minerals depletion tectonic evolution
分类号:
P581; P595
DOI:
10.16539/j.ddgzyckx.2020.06.013
文献标志码:
A
摘要:
地幔橄榄岩作为蛇绿岩套的重要组成单元, 由于其微量元素含量低、分析精度差且容易遭受变质作用影响而缺乏地球化学研究。本文选择泽当蛇绿岩金鲁剖面新鲜的地幔橄榄岩岩心样品, 展开岩石地球化学、矿物化学等研究, 识别出纯橄岩、蛇纹岩和方辉橄榄岩三种岩石。方辉橄榄岩相对于纯橄岩和蛇纹岩具有高SiO2、低MgO的特征, REE含量较高, 含有高Al的尖晶石, 反映地幔亏损程度较低(10%~25%); 而纯橄岩和蛇纹岩相对方辉橄榄岩具有低SiO2、高MgO的特征, REE含量很低, 含有相对高Cr的尖晶石, 反映地幔亏损程度高(30%~40%)。综合分析认为泽当地区古大洋上地幔不仅经历了正常的洋中脊熔融亏损阶段, 还在俯冲带流体交代作用下经历了进一步的熔融亏损过程, 泽当蛇绿岩形成于超级俯冲带(SSZ)之上。
Abstract:
Geochemistry of mantle peridotite, a major member of ophiolite, has been seldom reported due to serious alteration and limited analysis precision of its low trace element abundance. In this study, chemical analyses of the fresh core samples of mantle peridotite and minerals of the peridotites led to the recognition of three rock types including dunite, serpentite, and harzburgite. The harzburgite has relative higher SiO2, lower MgO contents, higher REE abundance, and contain Al-rich spinel, implying relative light depletion (10% - 25%); while the dunite and serpentite have higher MgO, lower SiO2 contents, extremely low REE abundance and Cr-rich spinel, indicating much heavy depletion (30% - 40%). It is suggested that the old ocean in the Zedang region not only lived through a depletion period at middle ocean ridge (MOR), but also a further depletion process resulted from metasomatism of subduction-related fluids, that is the ophiolite formed in the super subduction zone (SSZ). This result is consistent well with the conclusions reported previously on the basis of crustal lavas, and also supply an additional method to study ophiolite evolution especially for those dominant by peridotite.

参考文献/References:

邓万明. 1982. 雅鲁藏布蛇绿岩带火成岩研究//青藏高原地质论文专辑. 北京: 地质出版社: 36-52.
李强, 夏斌, 黄强太, 夏连泽, 夏中宇. 2014. 雅鲁藏布江蛇绿岩带东段泽当蛇绿岩起源及演化. 地质学报, 88(2): 145-166.
刘维亮, 夏斌, 刘鸿飞, 黄炜, 周国庆, 韦栋梁, 钟云, 陈玉琴. 2013. 西藏泽当蛇绿岩玄武岩SHRIMP锆石U-Pb 年龄及其地质意义. 地质通报, 32(9): 1356-1361.
刘颖, 刘海臣, 李献华. 1996. 用ICP-MS准确测定岩石样品中40余种微量元素. 地球化学, 25(6): 552-558.
桑隆康, 马昌前. 2008. 岩石学. 北京: 地质出版社: 633.
王希斌, 鲍佩声, 邓万明. 1987. 喜马拉雅岩石圈构造演化——西藏蛇绿岩. 北京: 地质出版社.
韦栋梁. 2007. 雅鲁藏布缝合带泽当段蛇绿岩的地球化学特征及构造意义. 北京: 中国科学院研究生院博士学位论文: 98.
韦栋梁, 夏斌, 周国庆, 王冉, 钟立峰, 万哨凯. 2006. 西藏泽当蛇绿岩的Sm-Nd等时线年龄及其意义. 地球学报, 27(1): 31-34.
夏斌, 郭令智, 施央申. 1998. 西藏西南部蛇绿岩及其地体构造. 广州: 中山大学出版社: 66-83.
夏斌, 王国庆, 钟富泰, 付绍洪, 洪裕荣, 陈国结. 1993. 喜马拉雅及邻区蛇绿岩和地体构造图及含说明书. 兰州: 甘肃科学技术出版社.
肖序常. 1984. 藏南日喀则蛇绿岩及有关的大地构造问题//李光岑等. 中法喜马拉雅考察成果. 北京: 地质出版社: 143-168.
张旗, 周国庆. 2001. 中国蛇绿岩. 北京: 科学出版社: 1-15.
赵文津, 冯昭贤. 1996. 青藏高原大陆动力学研究——“INDEPTH”合作研究的体会. 地球学报, 17(2): 119-128.
Aitchison J C, Davis A M, Abrajevitch A V, Ali J R, Zhu B D, Liu J B, Luo H, McDemid I R C and Ziabrev S V. 2003. Stratigraphic and sedimentological constraints on the age and tectonic evolution of the Neotethyan ophiolites along the Yarlung Tsangpo zone, Tibet // Dilek Y and Robinson P T. Ophiolites in Earth History. The Geological Society, 218: 147-164.
Aitchison J C, Zhu B D, Davis A M, Liu J B, Luo H, Malpas J G, McDemid I R C, Wu H Y, Ziabrev S V and Zhou M F. 2000. Remnants of a Cretaceous intra-oceanic subduction system within the Yarlung-Zangbo suture (southern Tibet). Earth and Planetary Science Letters, 183: 231-244.
Dick H J B and Bullen T. 1984. Chromian spinel as a petrogenetic indicator in abyssal and alpin-type peridotites and spatially associated lavas. Contributions to Mineralogy and Petrology, 86: 54-76.
Dubois-C?té V, Hébert R, Dupuis C, Wang C S, Li Y L and Dostal J. 2005. Petrological and geochemical evidence for the origin of the Yarlung Zangbo ophiolites, southern Tibet. Chemical Geology, 214: 265-286.
Dubois-C?té V, Hébert R, Wang C S, Li Y L and Dostal J. 2003. Petrogology and geochemistry of Yarlung Zangbo Suture Zone (YZSZ) ophiolites, Tibet: Geodynamic implications. Vancouver: GAC-MAC-SEG Joint Annual Meeting s, 28: 188.
Hofmann A W. 1988. Chemical differentiation of the Earth: The relationship between mantle, continental crust, and oceanic crust. Earth and Planetary Science Letters, 90: 297-314.
Jagoutz E, Palme H, Baddenhausen H, Blum K, Cendales M, Dreibus G, Spottel B, Lorenz V and Wanke H. 1979. The abundances of major, minor and trace elements in the Earth’s mantle as derived from primitive ultramafic nodules. Geochimica et Cosmochimica Acta, 10: 2031- 2050.
Melcher F, Meisel T, Puhl J and Koller F. 2002. Petrogenesis and geotectonic setting of ultramafic rocks in the Eastern Alps: Constrains from geochemistry. Lithos, 65: 69-112.
Nimis P and Taylor W R. 2000. Single clinopyroxene thermo-barmometry for garnet peridotites Part. 1. Calibration and testing of Cr-in-Cpx barometer and an entstatite in-Cpx thermometer. Contributions to Mineralogy and Petrology, 139(5): 541-554.
Pearce J A and Parkinson I J. 1993. Trace element models for mantle melting: Application to volcanic arc petrogenesis. Geological Society, London, Special Publications, 76(1): 373-403.
Réjean H, Francois H, Wang C S and Liu Z F. 2003. Yarlung Zangbo ophiolites (Southern Tibet) revisited: Geodynamic implications from the mineral record // Dilek Y and Robinson P T. Ophiolites in Earth History. Geological Society, London, Special Publications, 218(1): 165-190.
Sun S S and McDonough W F. 1989. Chemical and isotopic systematics of oceanic basalts: Implications for mantle composition and processes // Saunders A D and Norry M J. Magmatism in Ocean Basins. Geological Society, London, Special Publications, 42: 313-345.
Workman R K and Hart S R. 2005. Major and trace element composition of the depleted MORB mantle (DMM). Earth and Planetary Science Letters, 231(1-2): 53-72.

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备注/Memo

备注/Memo:
收稿日期: 2019-03-01; 改回日期: 2019-04-08
项目资助: 国家自然科学基金项目(41572198、41574079、41874107、41702224)和中国科学院战略性先导科技专项(XDB18000000)联合资助。
第一作者简介: 王浩(1990-), 男, 博士研究生, 构造地质学专业。Email: wh2010wh@126.com
通信作者: 李建峰(1981-), 男, 博士, 主要从事高温高压岩石和矿物流变学研究。Email: ljf@gig.ac.cn
更新日期/Last Update: 2020-12-20