牛苦头矿区隐伏矿床预测方法及其勘查成果
The Method of Concealed Deposit Forecast and Exploration Results at Niukutou Mining in Qinghai Province
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摘要: 牛苦头隐伏大型铁多金属矿床的成因属于矽卡岩矿床。矿区出露地层为上石炭统四角羊沟组碳酸盐岩,岩浆岩为隐伏于矿区深部的印支期二长花岗岩,铁多金属矿体主要产于两者外接触带附近。矿区的勘查工作始于1969年,但主要工作一直针对近地表规模较小的零星铁多金属矿体开展,对矿区总体地质特征缺乏系统的认识,以致以往的勘查找矿工作始终进展不大。直到2006年,通过综合分析矿区内地质矿产和地球物理特征,根据矽卡岩型矿床成矿理论,以地球物理异常圈定等方法成功地进行了隐伏矿床预测,进而取得重大找矿突破。
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关键词:
- 牛苦头隐伏铁多金属矿床 /
- 矽卡岩型 /
- 矿床预测
Abstract: Niukutou concealed iron polymetallic deposit is a large scale skarn-type deposit,The main stratum is the carbonate rock of the upper Carboniferous Shijiaoyanggou formation and the intrusive rocks are the Indosinian monzogranite in this deposit.The deposit mainly occurs in the vicinity of the outer contact zone between the two.Mine exploration work began in 1969,which mainly focused on the smaller sporadic iron-polymetallic ore body near-surface.The previous exploration work has been little progress in prospecting due to lacking systematically recognizing the mining geological characters.Until the year of 2006,we made significant breakthroughs in prospecting on the basis of comprehensive analysis of geophysical characteristics,metallogenic theory of skarn deposits,and successfully geophysical prospecting methods for concealed ore forecast. -
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