| 地壳平均丰度最小值法——成矿省成矿元素区域背景值的简易计算方法 |
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| 关键词:crustal abundance geostatistics minimun crustal abundance south-China antimony metallogenic province |
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| Minimum Crustal Abundance:A New Simple Method for Determining the Lower Boundary of Metallic Crustal Abundance in Metallogenic Province |
| The authors hypothesize the lognormal distribution of metal element in the crust of metallogenic province and deduce the minimum crustal abundance form the crustal abundance geostatistics of Argterberg and Divi(1978).We may use this simple method to determine the lower boundary of metal crustal abundance in metallogenic province if the cut off grade and metal tonnage are known in a specific amount of the crust.An example of the south_China antimony metallogenic province is taken;the resultant is correspondent to the observed crustal abundance in the region,when the circulation of underground water is supposed to have a depth of 5～10 kilometers.In this deep circulation of underground water,the possible maximum temperature of about 85～310℃ at the exit as the pipe model indicates,complies with the homogeneous temperature in the inclusion of vein in the antimony deposits such as the superlarge antimony deposit. |
| YI Jian-bin,SHAN Ye-hua,XIE Qing-lin.1998.Minimum Crustal Abundance:A New Simple Method for Determining the Lower Boundary of Metallic Crustal Abundance in Metallogenic Province[J].Acta Geoscientica Sinica,19(1):221-224. |
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