| 小秦岭金矿田太古宙太华群变质岩与金矿关系的探讨 |
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| 引用本文： | 张欢欢,白和,高虔,韩舫,田琦,杨房.小秦岭金矿田太古宙太华群变质岩与金矿关系的探讨[J].陕西地质,2013(2):15-20. |
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| 作者姓名： | 张欢欢 白和 高虔 韩舫 田琦 杨房 |
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| 作者单位： | [1]陕西省地矿局第六地质队,西安710611 [2]陕西省矿产资源勘查与综合利用重点实验室,西安710054 |
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| 摘 要： | 小秦岭金矿田变质岩是由表壳岩经过区域变质、深部重熔、混合岩化作用形成,典型特征是低钾富钠,具有太古宙TTG岩石特点.Au元素在太华群岩层、岩石中分布不均匀、多重母体分布是造成现今太华群金丰度值低的一个重要原因.Au元素在太华群地层和侵入于其中的花岗质岩石遭受变质及混合岩化作用过程中曾经历了非均一化作用并产生早期活化转移,在一些部位贫化,在一些部位富集,富集部位就可能形成矿床.硫、铅同位素的对比研究,证实了成矿物质来源于该套古老变质岩系.
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| 关 键 词： | 变质岩 深部重熔作用 硫、铅同位素 金矿床 |
RELATIONSHIP BETWEEN METAMORPHOSED ROCKS OF THE ARCHAEOZOIC TAIHUA GROUP AND GOLD MINERALIZATION IN THE XIAOQINLING GOLD FIELD |
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| Zhang Huan-huan,Bai He,Gao Qian,Han Fang,Tian Qi,Yang Fang.RELATIONSHIP BETWEEN METAMORPHOSED ROCKS OF THE ARCHAEOZOIC TAIHUA GROUP AND GOLD MINERALIZATION IN THE XIAOQINLING GOLD FIELD[J].Geology of Shaanxi,2013(2):15-20. |
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| Authors: | Zhang Huan-huan Bai He Gao Qian Han Fang Tian Qi Yang Fang |
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| Institution: | 1. Geological Team No. 6, Shaanxi Bureau of Geology and Mineral Resources, Xi＇ an 710611 ; 2. Key Laboratory of Comprehensive Utilization and Exploration of Mineral Resources of Shaanxi Province, Xi＇ an 710054 ) |
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| Abstract: | The metamorphosed rocks occurring in the Xiaoqinling gold field were formed by regional metamorphism and deep remelting of supracrustal rocks, typically featured in low sodium and potassium-rich with characteristics of the Archaeozoic TTG rocks. Researches performed on regional metamorphosed rocks in this area indicated that low value of gold abundance in the Taihua Group is mainly caused by non-homogeneous and multiple matrix distribution of Au element in the Taihua Group. When metamorphism and migmatitization occurred in the Taihua Group and intruded granitic rocks, Au element inside experienced hetergenization and caused early activation, resulting in Au element poor in some parts and enriched in other parts that formed gold deposits. Comparison of sulfer and lead isotopes revealed that the metallogenic materials are derived from the ancient metamorphic rocks, showing that the Archaeozoic Taihua metamorphosed rocks are the major supplier of metallogenic materials in this area. |
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| Keywords: | metamorphosed rock deep remelting sulfer and＇ lead isotopes gold deposit |
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