| 黄香定,丁式江.琼西二甲金矿床地质地球化学及矿床成因[J].地质找矿论丛,1992,(2):24-34 |
| 琼西二甲金矿床地质地球化学及矿床成因 |
| GENESIS AND GEOLOGY AND GEOCHEMISTRY OF ERJIA GOLD DEPOSIT, WESTERN HAINAN |
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| DOI：10.6053/j.issn.1001-1412.1992.2. 003 |
| 中文关键词: 金矿床 韧性剪切带 地质地球化学 成因 二甲 |
| 英文关键词: |
| 基金项目: |
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| 中文摘要: |
| 二甲金矿产于中元古界抱板群中,受区域性的戈枕断裂(韧性剪切)带的控制,抱板群为金的矿源层.区内产出三种类型的金矿化.矿床形成于中温、中压、中等盐度、中性-弱碱性条件下.成矿流体为大气水和变质水、岩浆水的混合热液,以K+-Na+-SO42-及Na+-K+-Ca2+-HCO3-Cl-为主型.硫源具有深源性质. |
| 英文摘要: |
| Erjia gold deposit which occurfes in Middle Proterozoic Baoban Group, is controlled by regional Gezhen fault （ductile shear） zone. Baoban Group is riched in metailogenie elements which make a basis for the formation of Erjla gold deposit. There are three types of gold mineralization in the area. The ore is formed at 190-310℃ and 45.6-50.7MPa with PH value of 8.01-9.25 and Nacl 6.4-9.3%. The ore-forming fluids ale near the area of magma fluid and metamorphic fluid and fall in area of meteroie water in plot. The early stages of ore-forming fluids are transported in the form of K+-Na+-SO42-, and the late, in Na+-K+-Ca2+-HCO3--Cl-. Sulfide in wall rocks and ores is from +1.85 to +9.76%. This indicates that S in ores is mainly from Baodan Group rocks. |
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