| 肖 力.西秦岭成矿带中东段金矿床成矿规律和找矿预测[J].地质与勘探,2014,50(Z1):1282-1290 |
| 西秦岭成矿带中东段金矿床成矿规律和找矿预测 |
| Mineralization laws and prospecting prediction for gold deposits in the middle-east section of West Qin Ling Mountains |
| 投稿时间：2014-03-28 修订日期：2014-09-16 |
| DOI： |
| 中文关键词: 成矿规律 成矿时间 矿床类型 元素组合 找矿预测 西秦岭 |
| 英文关键词: Mineralization law, mineralization time, deposit types, combination of elements, prospecting prediction, West Qin Ling |
| 基金项目:中国地质调查局调查评价项目（编号：1212011220662）甘肃岷县寨上－马坞地区金矿整装勘查区金矿调查评价及综合研究资助 |
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| 中文摘要: |
| 西秦岭近年来在新区发现新矿床和新类型金矿，矿床的地质特征表明金矿成矿受岩性、构造、岩浆活动的制约，许多金矿的地质、地球化学特征显示成矿与岩浆岩在时间和空间上关系密切；分析认为金矿主成矿时间为印支晚期-燕山早期，与区域大规模的岩浆活动在时间上一致；金矿主要有夕卡岩型、热液脉型和与岩浆活动有关的微细浸染型三种类型。矿石矿物元素组合显示由北而南成矿深度变浅、剥蚀程度较低；根据金、汞、锑矿床点和金、砷、锑、银元素分布特征，认为在北带岩体旁侧应注意寻找夕卡岩型和热液脉型金矿，中、南矿带在已知矿床深部注意寻找热液脉型金矿，有锑、汞矿点的区域注意深部及外围金矿的找矿；通过分析，最后圈定18处下一步重点工作区。 |
| 英文摘要: |
| In recent years, new gold deposits and new types gold ore have been in new districts of West Qin Ling. The geologic characteristics of the gold deposits show that mineralization is controlled by lithology, structure and magmatism. Geological and geochemical features of the gold ore indicate a close relationship in space and time between mineralization and magma rock. The main gold mineralization time is late Indosinian-early Yanshanina periods, temporally consistent with large-scale magmatic activity in this region. There are three principal types, i.e. skarn, hydrotheral vein-type，and fine disseminated gold deposits. From north to south, combination of mineral elements shows that the depth of mineralization becomes shallower and the degree of erosion lower. Based on features of distribution of gold, mercury, and antimony deposits, and gold, arsenic, antimony, and silver anomalies, this work suggests that ore-search for skarn and hydrothermal vein types of gold deposits should be conducted besides the rock mass in the northern zone, that for hydrothermal vein types toward depth of known deposits of the middle and south zones, and the deep subsurface and periphery of the region with antimony and mercury ore spots are also prospective sites. At last 18 focused areas for next prospecting are delineated. |
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