| 冉丽.东天山卡拉塔格地区火山机构地质特征[J].矿产勘查,2014,5(3):467-473 |
| 东天山卡拉塔格地区火山机构地质特征 |
| Geological characteristics of the volcanic apparatus in Kalataga, East Tianshan Mountains |
| 投稿时间：2012-10-23 |
| DOI： |
| 中文关键词: 火山机构 流动构造 影像特征 卡拉塔格 |
| 英文关键词: volcanic apparatus fluid structures characteristics of satellite image Kalatage |
| 基金项目:国家305项目(编号:2011BAB06B04-03)资助。 |
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| 中文摘要: |
| 新疆东天山卡拉塔格地区近年来新发现了铜锌金多金属矿田,找矿前景良好。该区火山(熔)岩具有流纹构造、气孔和杏仁构造、柱状节理等,研究其各自特征,推测岩浆的流动方向,并由此确定了火山机构C的位置,恢复了其古地貌为一自北西向南东倾斜的火山口。由于受北西向断层的影响,火山机构C在遥感影像图上呈蝌蚪状。根据火山熔岩的岩性和构造划分为两个喷发期次:早期的裂隙式火山喷发期,晚期的中心式火山喷发期。该区具有流动构造的火山熔岩与矿体的关系密切,具流纹构造的火山角砾熔岩区域多分布有脉状的黄铜矿,具柱状节理的玄武岩分布有浸染状的黄铁矿。卡拉塔格地区火山机构C从喷发中心由内向外依次为火山颈相→火山口相→近火山口相→远火山口相。研究卡拉塔格地区火山机构的地质特征,以期为在该区开展地质找矿工作提供参考。 |
| 英文摘要: |
| The copper-zinc-gold deposits have been newly discovered in the Kalatage area, eastern Tianshan metallogenic belt in Xinjiang. There is great prospection potential for non-ferrous and precious metal resources in the area. It was observed that the fluidal structure, vesicular structure, amygdaloidal structure and columnar jointing are widely distributed in the volcanic rocks (lava) in the area. By studying the volcanic structure characteristics, the flow direction of magma can be interpreted, then the location of the volcanic apparatus C was determined, and the ancient volcanic crater was restored, i.e., inclining SE from NW. The volcanic apparatus C looks like a tadpole in the remote sensing image due to the effect of the NW fault. On the basis of the rock features and structures of volcanic (lava), two periods of volcanic eruption was identified. The first stage of volcanic eruption belongs to the fissure type eruption and the second stage is the central eruption type. There is a close relationship between the lava with flow structure and mienralization in the area. The vein type chalcopyrite sulfide is commonly distributed in the volcanic breccia with fluidal structure and the disseminated pyrite distributed in the basalt with columnar joints. The zoning of the volcanic apparatus C has been outlined, i.e., from the central zone to the outer zone, the volcanic facies are as followings:volcanic neck facies, volcanic crater facies, nearby crater facies, and distal crater facies. The study result on the geological characteristics of the volcanic structures would provide basic geological information and new scientific evidence for the geological exploration in the Kalatage. |
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