| 西准噶尔塔尔巴哈台-谢米斯台地区火山热液型铜矿床(点)地质及含矿火山岩年代学、地球化学特征 |
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| 引用本文： | 张若飞,袁峰,周涛发,邓宇峰,张达玉,许超,赵冰冰.西准噶尔塔尔巴哈台-谢米斯台地区火山热液型铜矿床(点)地质及含矿火山岩年代学、地球化学特征[J].岩石学报,2015,31(8):2259-2276. |
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| 作者姓名： | 张若飞 袁峰 周涛发 邓宇峰 张达玉 许超 赵冰冰 |
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| 作者单位： | 合肥工业大学资源与环境工程学院, 合肥 230009,合肥工业大学资源与环境工程学院, 合肥 230009,合肥工业大学资源与环境工程学院, 合肥 230009,合肥工业大学资源与环境工程学院, 合肥 230009,合肥工业大学资源与环境工程学院, 合肥 230009,合肥工业大学资源与环境工程学院, 合肥 230009,合肥工业大学资源与环境工程学院, 合肥 230009 |
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| 基金项目： | 本文受"十二五"国家科技支撑计划项目(2011BAB06B01)、国家自然科学基金项目(41303031、41040025)、新世纪优秀人才支持计划项目(NCET-10-0324)和矿床地球化学国家重点实验室开放基金(201102)联合资助. |
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| 摘 要： | 西准噶尔塔尔巴哈台-谢米斯台地区研究和找矿勘探工作十分薄弱,近年来随着谢米斯台铜矿的发现,本项目组陆续发现了喀因德、乌兰浩特、阿依德、巴汗等铜矿点,指示该区具有与火山热液活动有关的铜成矿作用有的潜力。本文对这些矿床(点)开展了地质特征、年代学和地球化学研究显示,区内发育的阿尔木强、谢米斯台铜矿床以及喀因德、乌兰浩特、阿依德、巴汗等铜矿点与火山岩地层密切相关,矿化主要表现为黄铁矿化、孔雀石化,发育绿帘石化、绿泥石化、硅化、碳酸岩化等蚀变,具有火山热液型铜矿特点。锆石LA-ICP-MS U-Pb测年获得喀因德铜矿点火山岩年龄为455.1±5.4Ma,乌兰浩特铜矿点火山岩年龄为428.6±4.6Ma,阿依德铜矿点火山岩年龄为428.8±7.2Ma,谢米斯台铜矿床火山岩年龄为424.3±4.3Ma,阿尔木强铜矿床火山岩年龄为426.7Ma,巴汗铜矿点火山岩年龄为411.7±4.7Ma,可分为晚奥陶世、中志留世、早泥盆世三个阶段,以中志留世为主。地球化学特征显示晚奥陶世、中志留世、早泥盆世三个阶段的火山岩均形成于岛弧环境;且具有类似的岩浆源区和演化过程;岩浆在上升侵位过程中没有明显的受到外来物质混染。综合地质、年代学和地球化学特征显示,塔尔巴哈台-谢米斯台地区与火山热液有关的铜矿床(点)主要受控于构造背景、地层组合、岩石类型、蚀变、控矿构造等因素,其中中志留世中基性火山岩、与火山机构相关的深部可能存在的次火山岩或浅成侵入岩分布区具有较好的找矿潜力。
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| 关 键 词： | 火山热液 锆石U-Pb测年 地球化学 塔尔巴哈台-谢米斯台 西准噶尔 |
| 收稿时间： | 9/9/2014 12:00:00 AM |
| 修稿时间： | 2014/12/31 0:00:00 |
Geological characteristics, geochronology and geochemical characteristics of volcanic hydrothermal type copper deposits (points) in Taerbahatai-xiemisitai region, West Junggar |
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| ZHANG RuoFei,YUAN Feng,ZHOU TaoF,DENG YuFeng,ZHANG DaYu,XU Chao and ZHAO BingBing.Geological characteristics, geochronology and geochemical characteristics of volcanic hydrothermal type copper deposits (points) in Taerbahatai-xiemisitai region, West Junggar[J].Acta Petrologica Sinica,2015,31(8):2259-2276. |
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| Authors: | ZHANG RuoFei YUAN Feng ZHOU TaoF DENG YuFeng ZHANG DaYu XU Chao and ZHAO BingBing |
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| Institution: | School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China,School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China,School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China,School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China,School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China,School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China and School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China |
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| Abstract: | The research degree of Taerbahatai-xiemisitai region in West Juggar is poor, after the discovery of Xiemisitai copper deposit, we found the copper points of Kayinde, Wulanhaote, Ayide, Bahan in succession in recent years, which indicate there exist hopeful potentiality of Cu mineralization in the study area. In this paper, we focus on the geological characteristics, geochronology and geochemical characteristics of these Cu deposits (occurrence). The results showed that the Cu mineralization of the Aermuqiang, Xiemisitai, Kayinde, Wulanhaote, Ayide, Bahan areas are closely related with the volcanic strata, which mainly contain pyrite, malachite mineralization with epidotization, chlorite, silicification, carbonate alterations. They are characterized as volcanic hydrothermal copper mineralization. The LA-ICP MS U-Pb zircon ages of the mineralized volcanic rocks are 455.1±5.4Ma in Kayinde area, 428.6±4.6Ma in Wulanhaote area, 428.8±7.2Ma in Ayide area, 424.3±4.3Ma in Xiemisitai area, 426.7Ma in Aermuqiang area, 411.7±4.7Ma in Bahan area, respectively. The volcanic ages can be divided into three stages, which including Late Ordovicianthe, Middle Silurian and Early Devonian. The geochemical characters shows that the diagenesis and mineralization of three stages magmatism were occurred in island arc environment, and share the similar magmatic source and evolution process. The magmas had not been obviously contaminated by crustal material during magma emplacement. The main ore-controlling factors of those three stage volcanic hydrothermal activity related to copper deposits (points) can be summarized as tectonic setting, stratigraphy, rock types, alteration, ore-controlling structure. The Middle Silurian mafic volcanic-subvolcanic rocks associated with shallow intrusive rocks are the favorable prospectingclues of copper mineralization. |
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| Keywords: | Volcanic hydrothermal U-Pb zircon dating Geochemistry Taerbahatai-xiemisitai West Junggar |
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