贵县式铝土矿化与桂中新生代岩溶演化关系的认识

A RECOGNITION ON THE RELATION BETWEEN GUIXIAN-TYPE BAUXIZATION AND CENOZOIC KARSTIFICATION OF CENTRAL GUANGXI

贵县式铝土矿广泛分布于桂中岩溶区。本文通过宾阳矿区的成因研究,初步揭示出铝土矿与上古生界碳酸盐岩上的上白垩统红层及新生代地洼余动期岩溶演化的关系,认为铝土矿是红层在岩溶、气候、构造等条件下进行红土化,搬运沉积和次生红土化的结果。基于这种认识,提出了华南寻找三水铝土矿方向的新路子。

Guixian-type bauxite is widely distributed over the karst area of Central South and East-South Guangxi. Through the study of the Binyang orefield, this paper shows that the bauxite is related to Upper- Cretaceous red beds occurring on Upper-Paleozoic carbonate rock, and the evolution of Cenozoic (residual-mobility period of Diwa stage) karstification, and resulted from that red beds weathed, transported and re-weathed under karstification. Based on this recognition, a new way to search better ore deposit in South China is proposed.