ANALYSIS ON THE KAIYATASI VOLCANIC APPARATUS AND ITS METALLOGENETIC POTENTIALITY IN GUOZHIGOU AREA OF THE WESTERN TIANSHAN, XINJIANG OF CHINA
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摘要:
新疆西天山地区的早石炭世古火山机构是形成金矿床的重要构造。本文通过对新疆西天山果子沟地区开亚他斯古火山机构的形成时代、岩石类型、火山岩相、喷发旋回、喷发韵律、成矿条件的调查研究, 初步确定开亚他斯古火山机构形成于331Ma±2Ma(早石炭世), 为一套钙碱性系列岩石组合, 具有爆发相—喷溢相—爆发相的火山活动特征, 火山岩中金、锑、铋、锌、钼元素背景值较高, 有形成阿希火山岩型金床的成矿背景和潜力。
Abstract:The Early Carboniferous volcanic apparatus is an important metallogenetic structure for formation of gold deposit in the Western Tianshan.A study on the formation time of the volcanic apparatus, rock types, volcanic facies, eruptive cycles and metallogenetic conditions shows that the volcanic apparatus was formed about 331Ma ago, associated with calc-alkaline series rocks, and bearing volcanic cycle from explosive facies to extrusive facies and then to explosive facies.The volcanic rock has a higher background values of Sb, Pb, Mo, Bi, Au, So, constituting a good conditions for formation of the volcanogenic massive sulfide deposit.
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Key words:
- volcanic apparatus /
- volcanic rocks /
- metallogenetic potentiality /
- Western Tianshan /
- Kaiyatasi
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表 1 开亚他斯火山机构火山岩岩石化学特征表
Table 1. Chemical compositions of volcanic rocks of the Kaiyatasi volcanic apparatus
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表 2 开亚他斯火山机构火山岩稀土元素特征表
Table 2. REE data of volcanic rocks of the Kaiyatasi volcanic apparatus
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表 3 开亚他斯火山机构火山岩微量元素特征表
Table 3. Trace elements of volcanic rocks of the Kaiyatasi volcanic apparatus
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表 4 开亚他斯火山机构火山岩铷锶同位素年龄测试结果表
Table 4. Rb-Sr isotope of volcanic rocks of the Kaiyatasi volcanic apparatus
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表 5 开亚他斯火山机构火山岩成矿元素丰度表(定量光谱结果)
Table 5. Metallogenetic element data of volcanic rocks of the Kaiyatasi volcanic apparatus
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表 6 阿希古火山机构与开亚他斯古火山机构对比表
Table 6. Contrast of structure between Axi ancient volcano apparatus and Kaiyatasi volcano apparatus
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