梁东,赵德怀,华北,王锋,吴浩,梁孝伟.东昆仑东段清水泉中酸性侵入岩地球化学特征及成因讨论[J].地质找矿论丛,2022,37(1):58-67
东昆仑东段清水泉中酸性侵入岩地球化学特征及成因讨论
Geochemical characteristics and Genesis of Qingshuiquan intermediate-acid intrusive body in the east segment of the eastern Kunlun mountains
投稿时间:2021-08-30  修订日期:2022-02-13
DOI:10.6053/j.issn.1001-1412.2022.01.009
中文关键词:  清水泉侵入体  中酸性岩浆岩  地球化学  岩石成因  东昆南构造带  青海省
英文关键词:Qingshuiquan intrusive body  intermediate-acid magmatic rock  geochemistry  petrogenesis  the east Kunlun tectonic belt  Qinghai province
基金项目:
作者单位E-mail
梁东 中国冶金地质总局新疆地质勘查院, 乌鲁木齐 830000  
赵德怀 中国冶金地质总局新疆地质勘查院, 乌鲁木齐 830000 1054882626@qq.com 
华北 中国冶金地质总局新疆地质勘查院, 乌鲁木齐 830000  
王锋 中国冶金地质总局新疆地质勘查院, 乌鲁木齐 830000  
吴浩 中国冶金地质总局新疆地质勘查院, 乌鲁木齐 830000  
梁孝伟 中国冶金地质总局新疆地质勘查院, 乌鲁木齐 830000  
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中文摘要:
      清水泉侵入体位于青海省沟里地区的北部,处于东昆南造山带的东段,为东昆仑岩浆岩带的组成部分。该侵入体主要为花岗闪长岩和斜长花岗岩,次为闪长岩。不同岩性之间具有清楚的接触界线,花岗闪长岩和斜长花岗岩中含有暗色闪长质包体。岩石化学特征显示,侵入体为富钙中钾的钙碱性系列岩石,是岩浆成因的Ⅰ型花岗岩,形成于与岛弧、大陆弧有关的大陆碰撞环境,推测源于深部基性岩类的部分熔融。稀土元素地球化学特征表明侵入体中各种岩石均为同源岩浆产物,微量元素特征则显示构成侵入体的岩浆与大陆地壳具有较大的亲缘性。研究表明,清水泉侵入体形成于晚古生代-早中生代阿尼玛卿洋壳向北部大陆俯冲碰撞过程中,是由深部基性岩类部分熔融而成的中酸性岩浆侵入体。
英文摘要:
      Qingshuiquan intrusive body is geographically located in the North Gouli area of Qinghai province and geotectonically in the eastern segment of the east Kunlun orogenic belt constituting a part of the east Kunlun Magma belt.It is mainly composed of granodiorite,Plagioclase granite and less diorite with clear boundaries between the different lithologies.Granodiorite and Plagioclase granite enclose dark inclusions of diorite.Petrochemical results show that the intrusive rock belongs to I-type granite,the Ca-rich and K-rich calc-alkaline series formed under continental collision environment related to island arc and continental arc.It is presumed to be derived from partial melting of deep basic rocks.The REE geochemistry is characteristics of cognate material of the different lithologies;the trace element result,it's keen relationship to the continental crust.In summary it is a intermediate-acid intrusive body formed by partial melting of deep basic rocks during subduction of Arnimaqing ocean crust to north in the Late Paleozoic-Early Mesozoic period.
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