| 王任重,殷成玉.云南个旧松树脚锡矿西部成矿地球化学特征及找矿方向[J].地质找矿论丛,1988,(3):1-11 |
| 云南个旧松树脚锡矿西部成矿地球化学特征及找矿方向 |
| GEOCHEMICAL ASSESSMENT OF METALLOGENY IN THE WEST PART SONG SHUJIAO Sn-DEPOSIT IN GEJIU, YUNNAN PROVINCE |
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| DOI：10.6053/j.issn.1001-1412.1988.3. 001 |
| 中文关键词: 地球化学 锡矿西部 找矿方向 |
| 英文关键词: |
| 基金项目: |
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| 摘要点击次数: 1095 |
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| 中文摘要: |
| 通过对个旧锡矿松树脚矿田不同成矿部位的岩体和矿床的地球化学特征研究,以已知主要矿体分布地段为对比标准,用七类21项地球化学指标对与主要矿体分布地段毗连的普查区作出了成矿地球化学条件评价,这一评价为近来的工程揭露初步证实,并取得了较好的找矿效果。 |
| 英文摘要: |
| Song Shujiao ore-field is the second large-sized one in Gejiu mining district. Ore bodies are mainly occured in southeast part of the top of porphyritic biotite granitic stock in the east of the field whereas in the west of the field is the sporadic mineralization. Geochemical characteristics of ore deposits and the related granite in the east part are different from that of the west part. The east part is riched in ore-forming element distributed in the inner contact, the west part, riched in elements in outer contact. Sn content of whole rock in the east part is higher than that of the west part. And Sn distribution ratio in biotite is high for the east and low for the west. Oxidation index of biotite, coefficient of K-ion in octahedron and Sn-bearing cagacity are differenl in different metallogenic section. REE distrbution mcodel in biotite in the east is similar to their of stocks with best mineralization, the model in the west, similar to that of the stocks with poorest mineralization. REE distrabuttion model in biotite in the east is similar to that of stocks with best mineralization, the model in the west, similar to that of the stocks With poorest mineralization. REE distrabution model in cassiterite for both of the east and west part is coincided with that of the stocks. But REE of cassterite in the west part is higher than that of the east. Eu depletion of cassiterite in the east part is stronger than that of the west part, LREE/HREE, low for the east part and high for the west part. The cassiterite in the east part is riehed in Y relative to the west part. In addition to those mentioned above, crystal-cell coefficient of cassiterite, some element values in newboldits and pyrite reveal that ore-forming temperature is high for the east part which is infered as the center of metallogeny. Based on the geochemical information some sectors in the west part, which are similar in geochemistry to the east part are recognized. With 21 items of geochemistry standerds assessment of metallogeny was made for different sectors in the west part. Good results have been obtained by he engineering of exploration. |
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