贵州遵义—息峰铝土矿氧化还原参数研究和形成环境的地球化学分析

OXIDATION-REDUCTION PARAMETER OF BAUXITE IN THE ZUNYI-XIFENG AREA OF GUIZHOU PROVINCE AND GEOCHEMICAL ENVIRONMENT OF MINERALIZATION

本文对贵州遵义—息烽铝土矿合矿岩组的岩（矿）石进行了氧化还原参数△Ｅｈ的测定。根据△Ｅｈ的测定成果及其与Ａ１_２Ｏ_３、Ｆｅ_２Ｏ_３、Ｔｓ总含量的关系，把铝土矿分成了红、白、黄、黑４种成因类型；结合矿床地质特征和铝土矿形成的水－岩作用机理，讨论了含矿岩组和各类铝土矿形成的地球化学环境及其演化的作用机制。

Oxidation-reduction parameter△Eh of rocks and ores of ore-bearing rock series in the Zunyi-Xifeng bauxite deposit is determined. On the basis of relation of △Eh with Al2O3,C, Fe2O3 and Ts, the bauxites are divided into four types, i.e.red bauxite, white one, yellow one and black one. Combined with geological characteristics of bauxite and geochemical mechanism of water-rock interreaction, the geochemical environment and all types of bauxite, as well as metallogenic evolution are discussed.