| 李中明.河南省新安县郁山隐伏铝土矿成因分析[J].地质与勘探,2012,48(3):421-429 |
| 河南省新安县郁山隐伏铝土矿成因分析 |
| Genesis of the Yushan Concealed Bauxite Deposit in Xin'an County, Henan Province |
| 投稿时间：2011-07-20 修订日期：2012-01-30 |
| DOI： |
| 中文关键词: 铝土矿 成矿环境 物质来源 郁山 河南省 |
| 英文关键词: bauxite (clay) deposit, Henan Province, Yushan, metallogenic environment, material source |
| 基金项目:河南省2007 年度地质勘查基金(周转金)项目“河南省新安县郁山铝土矿详查冶(项目编号:豫国土资发(2008)87 号)及河南
省覆盖区铝(粘)土矿资源潜力评价和找矿技术研究项目(项目编号:资[2010]矿评01-12-13 号)项目联合资助 |
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| 中文摘要: |
| [摘 要]通过对河南省新安县郁山铝土矿床成矿时代、成矿物源、成矿环境、控矿因素等分析,认为郁山铝土矿床成矿时代为早二叠世,成矿物源主要为古陆铝硅酸岩风化物,少量为豫西中奥陶统马家沟组碳酸盐岩风化产物,成矿环境为渑池泻湖东北边缘的潮坪-沼泽环境,由长期的沉积间断、特定的岩相古地理特征、构造变形和表生风化作用共同控制矿床的形成。认为郁山铝土矿床的形成经历了“三期五阶段冶:“三期冶包括铝土矿体就位、埋藏、改造保存三个成矿时期;具体可划分为“五阶段冶,包括物源准备和搬运、同生、成岩、后生、风化和表生五个成矿阶段。提出了郁山铝土矿矿床为“古陆风化+碎屑和化学沉积冶的成矿模式。其主要成矿机制为机械和化学分异。 |
| 英文摘要: |
| Abstract:This paper analyzed the metallogenic epoch, ore-forming material source, metallogenic environment, and ore-controlling factors of the
Yushan bauxite ore deposit in Xin'an County, Henan Province. It is suggested that the Yushan bauxite ore deposit formed in the early Permian. Its ore
-forming material sources are weathered products, which mainly came from aluminum silicate rocks of the paleouplift, and a small mount were derived
from the underlying Middle Ordovician Majiagou Group carbonate rocks in western Henan Province. Metallogenic environment was the tidal flat-wetland
environment of northeast edge of Mianchi lagoon. The long-term sedimentary intermittence, specific lithofacies-paleogeographic characteristics, structural deformation and supergene weathering controlled the formation of the deposit jointly. It is considered that ore-forming process of the Yushan bauxite ore deposit has experienced three periods and five stages. The three periods are ore body emplacement, burial, transformation and preservation; the five stages are material source preparation, transportation, syngenesis, diagenesis, deuterogenic stage, weathering and epigenesis. A metallogenic model of bauxite(clay) deposits as “paleouplift weathered + clastic and chemical deposits冶is put forward. Its principal metallogenic mechanism is mechanical and chemical differentiation. |
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