| 刘纲,关广岳.赤峰-朝阳地区金矿床铅同位素特征及矿床成因[J].地质找矿论丛,1991,(2):91-98 |
| 赤峰-朝阳地区金矿床铅同位素特征及矿床成因 |
| THE LEAD ISOTOPE COMPOSITION AND ORE GENESIS OF GOLD DEPOSITS IN CHIFENG-CHAOYANG AREA IN NORTHEAST OF CHINA |
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| DOI：10.6053/j.issn.1001-1412.1991.2. 009 |
| 中文关键词: 赤峰-朝阳 金矿床 铅同位素物质来源 成因 |
| 英文关键词: |
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| 中文摘要: |
| 赤峰-朝阳地区金矿床主要产在太古代变质岩和海西、燕山期花岗岩组成的隆起带中。铅同位素研究表明:本区金矿床的成矿物质有两个来源,一个是太古代变质岩层,另一个是上地幔,二者在燕山晚期混合形成矿床。 |
| 英文摘要: |
| The gold deposits in Chifeng-Chaoyang Area are located in the uplifted zones which are consisted of Archean metamorphic rocks and Hercynian-Yanshanian granites.The pyrites and galenas from the gold deposits in the area display a significant range of lead iso-tope compositions and fall on a linear array in the 207Pb/204Pb vs.206Pb/204Pb diagram.We considerthat the linear array may have ben produced by the mixing of lead from two different sources. One is Archean matamorphic rock and the other is upper mantle.The gold mineralization is closely related to the granites and diorites of the late Yanshan period about 100Ma. |
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