首页 | 官方网站   微博 | 高级检索  
     

新疆东天山黄山东岩体岩石地球化学特征与岩石成因
引用本文:夏明哲,姜常义,钱壮志,夏昭德,汪帮耀,孙涛.新疆东天山黄山东岩体岩石地球化学特征与岩石成因[J].岩石学报,2010,26(8):2413-2430.
作者姓名:夏明哲  姜常义  钱壮志  夏昭德  汪帮耀  孙涛
作者单位:1. 长安大学地球科学与国土资源学院,西安710054;西部矿产资源与地质工程教育部重点实验室,西安710054
2. 长安大学地球科学与国土资源学院,西安,710054
基金项目:国家自然基金项目(40534020、40872070)和中央高校基本科研业务费专项资金(CHD2009JC019)
摘    要:黄山东岩体位于东天山北部的土墩-黄山-图拉尔根镁铁-超镁铁质岩带中段,受康古尔塔格-黄山深大断裂控制,是由辉长闪长岩、角闪辉长岩、橄榄辉长岩、辉长苏长岩及二辉橄榄岩组成的复式岩体。主量元素化学组成部分属拉斑玄武岩系列,也有部分属钙碱性系列。大部分岩石相对富集LREE、适度亏损高场强元素(Nb、Ta、Ti)。元素地球化学和Nd、Sr、Pb同位素体系证明,岩浆遭受了5%~8%的中-上地壳物质的同化混染作用。岩浆源区由被消减板片交代的地幔楔物质和软流圈地幔物质组成。岩石圈根部拆沉和软流圈地幔上涌过程中生成了黄山东岩体。富铁硅酸盐的分离结晶作用对硫化物富集并分凝起到了关键性作用,成矿过程应该是岩浆自身演化过程的有机组成部分。

关 键 词:岩石地球化学  岩浆演化  成矿作用  黄山东岩体
收稿时间:4/1/2010 12:00:00 AM
修稿时间:2010/6/21 0:00:00

Geochemistry and petrogenesis of Huangshandong intrusion, East Tianshan, Xinjiang
XIA MingZhe,JIANG ChangYi,QIAN ZhuangZhi,XIA ZhaoDe,WANG BangYao and SUN Tao.Geochemistry and petrogenesis of Huangshandong intrusion, East Tianshan, Xinjiang[J].Acta Petrologica Sinica,2010,26(8):2413-2430.
Authors:XIA MingZhe  JIANG ChangYi  QIAN ZhuangZhi  XIA ZhaoDe  WANG BangYao and SUN Tao
Abstract:Huangshandong intrusion is located in the centre segment of Tudun-Huangshan-Tulaergen mafic-ultramafic rock belt, the northern of East Tianshan, and controlled by Kangurtag-Huangshan ductile sheer zone. It is a multiple intrusion and composes of gabbro diorite, hornblende gabbro, olivine gabbro, gabbronorite and lherzolite. Some belong to the tholeiitic series; others are calc-alkaline series in petrochemical composition. Most of the rocks are slightly enriched in LREE, moderately depleted in HFSE (Nb, Ta, Ti). Element geochemistry and Nb, Sr, Pb isotope characters suggest that the magma was subjected to comtaminated about 5%~8% by upper-intermediate continental crust. The magma source is composed of wedge matasomasised by subducting slab and asthenosphere components. Huangshandong intrusion is the result of lithospheric delamination at the root and the upwelling of asthenosphere components. The fractional crystallization of Fe-rich silicate mineral could be responsible for sulphur saturation as well as sulfide melt segregation, and mineralization should be partly self-evolution of magma.
Keywords:Petrogeochemistry  Magma evolution  Mineralization  Huangshandong intrusion
本文献已被 CNKI 万方数据 等数据库收录!
点击此处可从《岩石学报》浏览原始摘要信息
点击此处可从《岩石学报》下载全文
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司    京ICP备09084417号-23

京公网安备 11010802026262号