| 吉林钾长花岗岩构造背景及铀对大型金矿床的控制 |
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| 关键词:kaligranite structural setting uranium large gold deposit Jilin |
| 基金项目:国家攀登计划,地质矿产部重点科技资助项目 |
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| Structural Setting of Kaligranites and Control of Uranium Large Gold Deposits in Jilin |
| Radiant energy and specific properties of uranium const itute one of main metallogenic conditions in Jiapigou gold deposit and Haigou go ld-uranium deposit, Jilin,which will probe into a new way for formation larges uperlarge gold deposit from another side. 1. Metallogenic setting effect showing that plate subduction make mantle fraction melting and resulting in U-bearing kaligranites. Structural activities make uranium enriched. U and K are decaying a lot of α particles that make up an enormous radiant energy field. 2. Heat and release effect. Basic veins and C-H-O fluid from mantle and mid-acidic veins a nd magma hydrothermal fluid from the earth crust intrude in the shape of pulsati on at the same time. 3. Rich Si and low Ca effect indicating that quartz orthoph yres control gold deposit. 4. Color radiant effect. 5. Easy dissolve and stable effect expressing that U 6+ easy dissolve and form complex cations. 6. Bene ficially carry gold effect. UO +2 2 puts in fluid and easy forms pyrites. 7. Choose precipitation effect. Precipitating UO 2 easy impel precipitation of gold and polymetallic sulfide in the meantime. 8. Occurrences control effect. Be cause kaligranitic shape and size are corresponding to gold deposit scale and oc currence, mainly exploratory targets in kaligranites or in metamorphic rocks an d sedimentary rocks above kaligranites should be selected. Think of quartz ortho phyres as exploratory symbol directly. |
| SUN Zhong-shi,DENG Jun,ZHAI Yu-sheng,LIU Wei.1999.Structural Setting of Kaligranites and Control of Uranium Large Gold Deposits in Jilin[J].Acta Geoscientica Sinica,20(2):163-168. |
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