河南省“煤下铝”矿床成因及找矿方法研究

Study on Genesis and Prospecting Method of Aluminum Deposit under Coal in Henan Province

通过河南省主要铝土矿矿体赋存状态、矿石类型、矿石矿物成分、化学成分及结构构造的研究,认为河南省铝土矿矿床属海湾潟湖相沉积型一水硬铝石矿床,其产出形态严格受碳酸盐岩古风化侵蚀面的岩溶地形控制。通过对已有煤勘资料二次集成分析,绘制了本溪组沉积相古地理图,圈定了铝土矿基底的碳酸盐岩岩溶漏斗的分布范围,辅助“煤下铝”重点找矿靶区的选取;采用可控源音频大地电磁测深(CSAMT)解译铝土矿基底碳酸盐岩不整合面的起伏形态,圈定碳酸盐岩岩溶漏斗的分布范围,亦可在“煤下铝”找矿中起到辅助作用。

Through the study on main bauxite orebody hosting state,ore type,ore mineralogical composition,chemical composition,texture and structure etc has considered that bauxite deposit in the Henan Province belongs to bay lagoon facies sedimentary diaspore deposit.Its occurrence form is strictly controlled by carbonate rock paleoweathering erosion surface karst landform.Using available coal exploration data once again integrated mapping of the Benxi Formation sedimentary facies paleogeographic map to delineate bauxite basement carbonate rock karst funnel distribution range,thus can auxiliarily select aluminum deposit under coal key prospecting targets;Using CSAMT sounding to interpret bauxite basement carbonate rock unconformity surface rolling topography,delineate carbonate rock karst funnel distribution range can also be additional means in aluminum deposit under coal prospecting.