哈密地区新发现铜镍硫化物矿床成岩成矿时代的测定及讨论  

Dating and Discussion on the Rock-Forming and Ore-Forming Age of Newly-Discovered Cu-Ni-Sulfide Deposits in Hami, Xinjiang

作　　者：王虹[1] 屈文俊[2] 李华芹[3] 陈世平[4] 

机构地区：[1]长安大学地球科学与国土资源学院 [2]国家地质实验测试中心,北京100037 [3]中国地质调查局宜昌同位素研究中心,湖北宜昌433003 [4]新疆哈密国土资源局,哈密830000

出　　处：《地质学报》2007年第4期526-530,共5页Acta Geologica Sinica

基　　金：中国地质调查局项目(编号200420190004);国家科技攻关项目(编号2003BA612A-01)资助成果

摘　　要：新疆东天山地区是我国一个重要的铜镍硫化物矿床密集区,近年来又取得了地质找矿的新进展,如白石泉、天宇和图拉尔根等。本文利用Re-Os同位素定年新技术,分别测定了天宇、坡北和白石泉3处铜镍硫化物矿产地的成岩成矿年龄,各自获得了835Ma、410Ma和286Ma的等时线年龄,表明东天山地区与基性超基性岩有关的铜镍硫化物矿床成矿作用不只是集中在海西一个时期,从而为地质找矿提出了新的方向。East Tianshan is an important concentration area of Cu-Ni-sulfide deposits in Xinjiang. New advance has been obtained in this area, such as the discovery of the Tianyu, Baishiquan and Tulaergen deposits. New Re-Os age data are reported in this paper, i.e. 835 Ma, 410 Ma and 286 Ma for the rock--forming and ore-forming ages of the Tianyu, Pobei and Baishiquan deposits respectively. This result suggests that the Mafic-ultra Mafic Mag Matism-related Cu-Ni-sulfide deposits in the East Tianshan area not only formed during the Hercynian stage, but also during the Caledonian and Proterozoic stage, opening a new window for further prospecting for Cu-Ni deposits.

关 键 词：铜镍硫化物矿床 RE-OS同位素定年 天宇 坡北 白石泉 新疆 

分 类 号：P618.4[天文地球—矿床学]