| 三江地区中南部三叠系地层地球化学特征初析 |
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| 引用本文： | 汪洋,胡云中,邓晋福.三江地区中南部三叠系地层地球化学特征初析[J].矿物岩石,2001,21(3):200-204. |
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| 作者姓名： | 汪洋 胡云中 邓晋福 |
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| 作者单位： | 1. 中国地质大学,北京,岩石教研室,北京,100083
2. 中国地质科学院矿床地质研究所,北京,100037 |
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| 基金项目： | 国家自然科学基金项目 (编号 49733110 ,49772 15 5 )，国土资源部国际合作与科技司科技发展计划“华南地区岩石圈三维结构及其演化”( 2 0 0 0 10 10 2 0 6 )，“华北地区岩石圈三维结构及其演化”( 2 0 0 0 10 10 2 0 2 )，中国地质调查局地质调查项目 ( K1.4-1- |
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| 摘 要： | 根据三江地区中南部三叠系地层 30 0余件岩石样品分析结果 ,我们对该地区三叠系地层地球化学特征进行了研究。研究表明三江地区中南部三叠系地层明显富集As,Sb和 Ca元素 ,亏损碱金属元素 K,Na,L IL元素 Ba,Th以及相容元素 Co,Cr,Mn,Ni,V ,且轻重稀土元素分异程度较高。在成矿元素方面 ,研究区三叠系地层富集 Pb,Sb,且Cu,Au,Zn的丰度值明显高于华北地台表壳 (出露地壳 )。根据微量元素比值推断 ,三江地区中南部三叠系地层的物源区在地球化学成分方面较典型岛弧造山带上地壳更为成熟
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| 关 键 词： | 地球化学 元素丰度 三叠系 三江地区中南部 |
| 文章编号： | 1001-6872(2001)03-0200-05 |
| 修稿时间： | 2001年5月10日 |
A PRELIMINARY STUDY ON THE GEOCHEMICAL CHARACTERISTICS OF TRIASSIC STRATA IN THE CENTRAL AND SOUTHERN PARTS OF THE NUJIANG-LANCANGJIANG- JINSHAJIANG AREA |
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| WANG Yang,HU Yun zhong,DENG Jin fu.A PRELIMINARY STUDY ON THE GEOCHEMICAL CHARACTERISTICS OF TRIASSIC STRATA IN THE CENTRAL AND SOUTHERN PARTS OF THE NUJIANG-LANCANGJIANG- JINSHAJIANG AREA[J].Journal of Mineralogy and Petrology,2001,21(3):200-204. |
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| Authors: | WANG Yang HU Yun zhong DENG Jin fu |
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| Institution: | WANG Yang 1 HU Yun zhong 2 DENG Jin fu 1 |
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| Abstract: | Based on the chemical analysis of over 300 rock samples from the Triassic strata in the central and southern parts of the Nujiang-Lancangjiang-Jinshajiang area, the geochemical characteristics of the Triassic strata was studied. The result exhibits the enrichment of As, Sb and Ca,the depletion of alkaline elements K, Na, and LILE Ba, Th, as well as the compatible elements Co, Cr, Mn, Ni, V in the Triassic strata of the research region. Meanwhile, the ratio of light and heavy REE of the Triassic strata is higher. Of the metallogenic elements, the Triassic strata of the research region are rich in Pb and Sb, and the abundances of Cu, Au, and Zn are higher than those in the exposed crust of North China Platform. According to the trace element ratios, the source region of Triassic strata exhibits a slight mature feature in composition than the upper crust of typical arc orogenic belt. |
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| Keywords: | geochemistry element abundance Triassic strata central and southern parts of the Nujiang Lancangjiang Jinshajiang area |
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