| 西藏日土县拉热拉新花岗岩体特征及构造环境 |
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| 引用本文： | 冯晔,廖六根,黄俊平,徐平.西藏日土县拉热拉新花岗岩体特征及构造环境[J].华东地质学院学报,2005,28(4):317-324. |
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| 作者姓名： | 冯晔 廖六根 黄俊平 徐平 |
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| 作者单位： | 江西省地质调查院,江西南昌330201 |
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| 基金项目： | 1：25万日土县幅、喀纳幅区域地质调查（200213000008） |
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| 摘 要： | 拉热拉新花岗岩体属于唐古拉-东达山花岗岩带西段羌塘花岗岩区的组成部分,岩石类型主要为黑云角闪闪长岩、黑云角闪石英闪长岩、黑云角闪石英二长岩、黑云花岗闪长岩、黑云二长花岗岩、黑云花岗岩。其地球化学特征表现为：富Si,K,贫Ti,Mg,Fe,Ca,铝饱和指数ACNK〈1．1,稀土元素球粒陨石标准化图式呈右倾斜的“V”字型,LREE富集,HREE相对亏损,铕亏损。其形成时代为早白垩世,为多期次同碰撞的同熔型花岗岩。
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| 关 键 词： | 花岗岩 构造环境 拉热拉新 西藏 |
| 文章编号： | 1000-2251(2005)04-317-08 |
| 收稿时间： | 2005-03-30 |
| 修稿时间： | 2005年3月30日 |
Characteristics and Tectonic Environment of Larelaxin Granite Plutons in Ritu County, Tibet |
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| FENG Ye, LIAO Liu-gen, HUANG Jun-Pin, XU Pin.Characteristics and Tectonic Environment of Larelaxin Granite Plutons in Ritu County, Tibet[J].Journal of East China Geological Institute,2005,28(4):317-324. |
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| Authors: | FENG Ye LIAO Liu-gen HUANG Jun-Pin XU Pin |
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| Institution: | Jiangxi Institute of Geological Survey, Nanchang, JX 330201 ,China |
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| Abstract: | As a component in the Qiangtang granite district of the Tanggula-Dongda mountain granite zone, Lare-laxin Granite Plutons mainly contain such rock types as biotite hornblende diorite, biotite hornblende quartz dio-rite, biotite hornblende quartz monzonite , biotite granodiorite, biotite adamellite, biotite granite. And Larelaxin Granite Plutons are of such geochemical characteristics as being rich in Si, K, being depleted in Ti, Mg, Fe, Ca, and ACNK < 1.1, and patterns of REE distribution standardized by chondrite inclining right in "V"-shape, being rich in LREE and relatively depleted in HREE and Eu. They were formed in Early Cretaceous Period as poly-syn-collisional syntectic granites. |
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| Keywords: | granite tectonic environment Larelaxin Tibet |
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