河南省中西部铝土矿微量元素比值特征及其成因意义

Characteristic Ratios of Trace Elements and Genetci Significance of Bauxite Deposits in Central-Western Henan

根据河南中西部铝土矿和粘土质岩石微量元素含量定量分析结果,以及由此而得出的V/Zr、Sr/Ba和B/Ga比值曲线,反映了成矿时水动力条件和古地理、古地貌的复杂性.认为铝土矿具有多阶段成矿的特点.矿床形成于非正常海水条件下,属多因复成矿床.

In the light of the quantitative analyses data of the trace elements contents in bauxite end clayof the Central-Western parts of Hcnan Province, the V/Zr, Sr/Ba, and B/Ga ratio curves were calculated. From these curves the complexities of the hydrodynamic condition. Palaeogeography and palaeogeomorphology during the metallogenic epoch are noted. It is believed that the bauxite is characterized by a multiphasic metallogenesis, and the bauxite deposits, being formed under a condition of abnormal seawater environment, belong to the multiple genesis type.