摘要
新疆兴地Ⅱ号铜镍矿床位于库鲁克塔格前寒武纪基底陆壳隆起带南部,兴地深大断裂南侧,产于兴地Ⅱ号基性-超基性杂岩体内.本文通过对兴地Ⅱ号杂岩体中辉长岩进行LA-ICPMS锆石U-Pb精确定年,获得206Pb/238U加权平均年龄为740.2±5.7Ma,表明兴地Ⅱ号铜镍矿(基性-超基性杂岩体)形成于新元古代南华纪.对兴地Ⅱ号含铜镍杂岩体的年代学研究,为揭示兴地Ⅱ号铜镍矿床的成矿动力学背景,以及进一步寻找和深入研究区域内同类矿床具有重要的理论依据.
The Xinjiang Xingdi No. ⅡCu-Ni deposit prouduced in Xingdi No. Ⅱmafic-ultrmafic complex rock body which is located in the south of the continental crust uplift of Kuruktag Precambrian basement and the south Xingdi deep faults. A gabbro sample yielded a SIMS U-Pb zircon age of 740.2±5.7Ma（MSWD=0.85, 95% confidence level）, which indicates that the Xingdi No. ⅡCu-Ni deposit（mafic-ultramafic complex） formed during the Nanhua period. It’s provide a theoretical basis to study the ore-forming era of the Xingdi No. ⅡCu-Ni deposit’s for the further seek and in-depth studies on the deposit.
出处
《新疆大学学报（自然科学版）》
CAS
2014年第2期243-247,252,共6页
Journal of Xinjiang University(Natural Science Edition)
基金
新疆维吾尔自治区自然科学基金项目(2013211B07)
关键词
铜镍矿
基性-超基性岩
成矿模式
兴地
Cu-Ni deposit
Mafic-ultramafic rock
Ore-forming model
Xingdi
