| 王朝义,马良.安徽沿江坳陷多金属成矿带控矿因素与找矿建议[J].地质找矿论丛,2015,30(1):16-22 |
| 安徽沿江坳陷多金属成矿带控矿因素与找矿建议 |
| Ore-controlling factors and prospecting proposals for the polymetallic ore belt along the Yangtze valley,Anhui province |
| 投稿时间：2013-11-29 |
| DOI：10.6053/j.issn.1001-1412.2015.01.002 |
| 中文关键词: 沿江坳陷带 多金属成矿带 成矿规律 控矿因素 找矿建议 安徽省 |
| 英文关键词:depression zone along the Yangtze valley polymetallic ore belt metallogenic laws ore-controlling factors prospecting proposals Anhui province |
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| 摘要点击次数: 1759 |
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| 中文摘要: |
| 安徽沿江坳陷是长江中下游铁铜成矿带的重要组成部分,近10年来安徽新发现的具有较高经济价值的金属矿床几乎全都在该区。侵入岩体周边不同性质的围岩往往对矿床的类型具有控制作用;区域性深大断裂控制了成矿母岩的形成和分布,而具体的矿床构造(褶皱、断裂、接触带)控制着成矿有利空间(低压带)的分布;燕山中晚期中性-中酸性混熔型钙碱性岩浆岩不仅控制金属矿床的产出部位,还提供了成矿物质、热能,并产生成矿热液;矿床均围绕岩体分布,具有矿种和矿物组合等方面的水平-垂向分带;成矿时代为130~155 Ma,金属矿床分为玢岩型铁矿、夕卡岩型铁矿、斑岩型铜矿、夕卡岩型铜矿、层控型铁铜矿等5种矿床类型,各类型之间存在过渡、共生、叠加关系,构成中性-中酸性岩浆成矿系列。建议在今后的找矿工作中,要选好靶区、就矿找矿,加强中性-中酸性岩浆岩和控矿构造的研究,并注意技术方法的有效性与多解性。 |
| 英文摘要: |
| Depression area along Yangtze river in Anhui province is an important part of the middle-lower Yangtze river Fe-Cu ore belt. All the economic metal deposits discovered in resent years in Anhui province are all mostly located here. Wall rocks with different properties in surroundings of intrusive body control the deposit type and regional faults control formation and distribution of the host rock. The structure (fold, fault and contact zone) controls distribution of the favorite ore space (low pressure zone). The Middle-Late Yanshanian intermediate-acidic mixed melted calcareous alkali magmatic rock not only controls location of the metal deposit but also provides ore materials and heat energy to produce ore fluid. All the deposits are distributed around the intrusive body and characterized by vertical and horizontal zoning of ore deposit type and mineral assemblages. The metallogenic period is 155 to 130 Ma. The metal deposit are divided into porphyrite Fe deposit, skarn Fe deposit, porphyry Cu deposit, skarn Cu deposit and strtabound Fe-Cu deposit. Maybe the deposits occur together or overprinted or one deposit is transferred to the other so as to constitute the intermediate-acidic metallogenic series. Proposal is made here that prospecting in future should be directed to depth and surroundings of the known deposits and attention paid to research on intermediate-acidic magmatic rock and effectiveness and multi-solution of the prospecting techniques. |
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