| 胡宁,徐安武.鄂西宁乡式铁矿分布层位岩相特征与成因探讨[J].地质找矿论丛,1998,(1):40-47 |
| 鄂西宁乡式铁矿分布层位岩相特征与成因探讨 |
| HORIZON,LITHOFACIES AND GENESIS OF THE NINGXIANG-TYPE IRON DEPOSIT IN WESTERN HUBEL,CHINA |
| 投稿时间：1997-08-04 修订日期：1997-08-30 |
| DOI：10.6053/j.issn.1001-1412.1998.1. 005 |
| 中文关键词: 宁乡式铁矿 陆表海环境 鲕状结构 同生沉积 |
| 英文关键词:The Ningxiang-typeiron deposit epeiric sea environment oolitic texture syngenetic deposit |
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| 中文摘要: |
| 鄂西宁乡式铁矿分布广、规模大,尤以普遍发育赤铁矿鲕粒而独具特色。并且它一般赋存于加里东运动后第一个海浸沉积序列中由碎屑岩向碳酸盐岩过渡的层位,岩相古地理环境有明显的控制作用。本区铁矿层中赤铁矿鲕粒类型之繁多,结构之复杂,完全可与碳酸盐鲕粒相提并论,其成因亦非常相似,均为强烈搅动环境中机械沉积的产物。经波浪和潮汐水流的再次搬运富集,最后定位于中等-弱动荡环境或相对低凹的近滨相和远滨相上部。 |
| 英文摘要: |
| The Ningxiang-type iron deposit in western Hubei is noted for wide-spreading and large-siz eand is characterized by hematite ooid.It occurs in the transitional horizon from clasolite to carbonate which belongs to the first sequence of transgression sedimentaion after Caledonian movement and is controlled by lithofacies and palaeogeography. In the area hematite ooid is of many types and complex texture that can be comparable to carbonate coid and formed in intense agitation environment similar to carbonate.After being retransported and enriched by wave and tide process these ooid form the NingXiang-type iron deposit which is believed to belong to nearshore facies and upper offshore facies. |
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