| 杨晓松,赵远由,石再平,周国臣,蔡小勤.黔北马鬃岭铝土矿床含矿岩系地质特征及形成环境分析[J].贵州地质,2021,38(2):161-168, 160 |
| 黔北马鬃岭铝土矿床含矿岩系地质特征及形成环境分析 |
| Geological Characteristics and Formation Environment Analysis of Ore Bearing Rock Series in Mazongling Bauxite Deposit of Northern Guizhou |
| 投稿时间：2021-01-25 |
| DOI： |
| 中文关键词: 铝土矿 含矿岩系 地质特征 形成环境，黔北 |
| 英文关键词:Bauxite Ore-bearing rock series Geological characteristics Formation environment Northern Guizhou |
| 基金项目:贵州省2020年重点矿产资源大精查项目之“贵州省正安县马鬃岭铝土矿勘探”。 |
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| 中文摘要: |
| 通过对含矿岩系的岩性、岩(矿)石结构构造、化学组成、矿物组成等的研究，认为:含矿岩系的岩性组合规律性强。底部为深色含绿泥石铝质泥岩，之上为浅色铝质泥岩。中部为以一水硬铝石为主的豆鲕-碎屑-蜂窝状-半土状铝土矿，中上部为以勃姆石为主的致密块状铝土矿，顶部为以勃姆石为主的豆状、碎屑状铝土岩(矿)。铝土矿石的形成，是成矿母质经历了风化氧化、剥蚀、搬运、沉积、暴露淋滤，最终形成现在的铝土矿。含矿岩系底部含绿泥石铝质泥岩形成于过渡相的半咸水环境，中部及上部铝土矿(岩)形成于陆相湖泊环境。含矿岩系中的硫铁矿是沉积后的实成岩过程中，流体带入的硫，与岩(矿)石中的氧化铁反应，在孔隙处沉淀而成。 |
| 英文摘要: |
| Through the study of lithology，rock(ore)structure，chemical composition and mineral composition of ore bearing rock series，consider : The lithologic association of ore bearing rock series has strong regularityThe bottom is dark chlorite bearing aluminous mudstone，and the top is light colored aluminous mudstoneThe middle part is pisolitic clastic honeycomb semi earthy bauxite dominated by diaspore，the upper part is compact massive bauxite dominated by boehmite，and the top part is pisolitic and clastic bauxite dominated by boehmiteThe formation of bauxite ore is due to the fact that The ore-forming parent material experienced wind oxidation、 denudation、 transportation、deposition、 exposure and leaching，and finally formed the present bauxiteThe chlorite bearing aluminous mudstone at the bottom of the ore bearing rock series was formed in the brackish water environment of the transitional phase，and the bauxite(rock)in the middle and upper part was formed in the continental lake environmentPyrite in ore bearing rock series is formed by the reaction of sulfur brought in by fluid with iron oxide in rock(ore)during the process of diagenesis after sedimentation and precipitation in pores |
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