摘要
过去一般认为西准噶尔西南部的侵入岩均为海西中晚期,但近年在玛依勒及巴尔鲁克等构造带发现了一些早古生代侵入岩体,部分岩体显示有铜(金)矿化。本文对其中的占贝勒成矿斑岩体,利用LA-ICP-MS法进行锆石U-Pb同位素测年,结果获得425.3±2.6 Ma的年龄,揭示西准噶尔西南部地区存在有加里东期中酸性侵入岩,进而说明西准噶尔西南部地区存在加里东期斑岩型铜金成矿事件。该研究成果不仅对分析本地区地质构造演化具有重要意义,且对西准地区成矿规律的总结和进一步找矿预测具有重要意义。
Intrusions in southwestern west Junggar were considered to be Meso-and Neo Hercynian. Recent studies on the Mayila and Baruq tectonic belt,however, have recognized Early Paleozoic intrusions, some of which are copper and gold mineralized. LA-ICP-MS U-Pb dating of zircons from the Zanbaylor mineralized porphyry gives an age of 425.5±2.6 Ma,indicating that there are Caledonian intermediate to acid intrusions and Caledonian porphyry copper and gold mineralization in the southwestern region of west Junggar. The recognition not only contributes to the regional tectonic evolution analysis, but also provides effective implications for the summary of metallogenic regularity and further prospecting in west Junggar.
出处
《地质科学》
CAS
CSCD
北大核心
2013年第3期806-814,共9页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
中国地质调查局项目"新疆1:25万捷尔任斯克
托里县幅区调修测"(编号:1212010911056)
新疆自治区地质勘查基金项目"新疆托里县库普一带1:5万区域地质矿产调查"(编号:XJZBKD2008-03)资助
