| 东秦岭及邻区地球化学分区与地球化学制图 |
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| 引用本文： | 谷晓明 张本仁. 东秦岭及邻区地球化学分区与地球化学制图[J]. 地球科学, 1993, 18(4): 463-476 |
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| 作者姓名： | 谷晓明 张本仁 |
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| 作者单位： | 中国地质大学地球化学系(谷晓明)，中国地质大学地球化学系(张本仁) |
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| 摘 要： |
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| 关 键 词： | 地球化学 区划 制图 东秦岭 |
GEOCHEMICAL SUBDIVISION AND MAPPING OF EAST QINLING AND ADJACENT AREAS |
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| Gu Xiaoming Zhang Benren. GEOCHEMICAL SUBDIVISION AND MAPPING OF EAST QINLING AND ADJACENT AREAS[J]. Earth Science-Journal of China University of Geosciences, 1993, 18(4): 463-476 |
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| Authors: | Gu Xiaoming Zhang Benren |
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| Abstract: | The paper deals with geochemical subdivision and mapping of East Qinling and its adjacent North China and Yangtze cratons on the basis of the data, including estimations of the regional crust and upper mantle compositions. It is suggested that geochemical provinces should be determined according to the difference in geochemical characteristics of the litho-sphere and of the upper mantle in particular, because the chemical specificity of the regional upper mantle decides finally the compositional features of a geochemical province. In a geochemical province geochemical domains are suggested to be determined on the basis of the difference in geochemical characteristics of the regional crust, which are the reflection of the different geologic-tectonic evolution of geochemical domains. The peculiarities of geochemical fields in one geochemical domain depend mainly on the geochemical characteristics of products of different geological processes in the fields,so the latter can serve as a criterion to sub- divide a geochemical domain into geochemical fields. Geologic-geochemical processes in one geochemical field with lateral changes of conditions or material sources can differentiate to form geochemical subfields with different chemical characters. According to the suggested criteria the studied region is subdivided into two geochemical provinces, four geochemical domains and forty two geochemical subfields which belong to three different types of geochemical fields. Finally, the regional geochemical map is made and the main characteristics of the geochemical subdivision are discussed. |
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| Keywords: | geochemical subdivision geochemical province geochemical domain geo-chemical field geochemical subfield. |
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