| 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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| 引用本文：孙忠实,邓军,翟裕生,刘伟.1999.吉林钾长花岗岩构造背景及铀对大型金矿床的控制[J].地球学报,20(2):163-168. |
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| 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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| 中文摘要:Ｕ的放射能和特性构成吉林夹皮沟金矿和海沟金铀矿主要成矿条件之一，它从另一侧面为大型、超大型金矿的形成探求一条新途径：（１）成矿背景效应：板块俯冲使幔源物质发生分熔形成含铀钾长花岗岩，随构造活动的进行Ｕ进一步富集，由Ｕ、Ｋ蜕变出α粒子组成一个巨大放射能量场；（２）加热释放效应：幔源基性脉、Ｃ－Ｈ－Ｏ流体和壳源中酸性脉、岩浆热液同时脉动性上侵；（３）富硅低钙效应：石英正长斑岩脉控矿；（４）辐射致色效应；（５）易溶稳定效应：Ｕ６＋易溶呈络离子；（６）有利载金效应：ＵＯ２２＋加入易形成黄铁矿；（７）选择沉淀效应：沥青铀矿沉淀同时易促使Ａｕ和多金属硫化物沉淀；（８）产状控制效应：因钾长花岗岩体形态、大小与金矿规模、产状具对应关系，所以探矿靶区应重点选定在钾长花岗岩体之内或之上的变质及沉积地质体中，石英正长斑岩脉可直接作为找矿标志。 |
| 中文关键词:钾长花岗岩 构造背景 铀 大型金矿床 吉林 |
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| Structural Setting of Kaligranites and Control of Uranium Large Gold Deposits in Jilin |
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| Abstract: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. |
| keywords:kaligranite structural setting uranium large gold deposit Jilin |
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