贵州中北部铝土矿若干微量元素特征及其成因意义

TRACE ELEMENTS CHARACTERISTIC AND GENETIC SIGNIFICANCE OF BAUXITE DEPOSITS IN CENTRAL-NORTHERN GUIZHOU

根据贵州中、北部若干铝土矿床中各类铝土矿石、粘土岩和下伏及上覆岩石中微量元素Ｓｒ、Ｂａ、Ｇａ、Ｖ、Ｚｒ的定量分析资料与Ｓｒ／Ｂａ、Ｂ／Ｇａ、Ｖ／Ｚｒ比值和比值曲线，以及由硼的含量算出的校正硼、相当硼含量和含盐度，结合区域地质背景及含矿岩系剖面，讨论了铝土矿带的形成环境，指出修文铝土矿带和遵义铝土矿带在微量元素方面的差别，反映了二者在沉积成矿环境上的差异：前者形成于淡化泻湖一滨海沼泽环境，后者形成于滨海沼泽环境。

In this paper,quantitative analyses of trace elements Sr,Ba,B,Ga,V,Zr contents in bauxite and clay rock and other host rock of the Central-Northern parts of Guizhou are made.The Sr/Ba,B/Ga and V/Zr ratio,correction Boron,equation Boron contents and salinity are calculated.Considering region geological setting and section of ore-bearing rock system,the authors discuss the geological environment of mineralization and point out the difference between Xiuwen Banxite Zone and Zunyi Bauxite Zone:the former belongs to freshen logoon-swamp environment,and the latter belongs to swamp environment of littoral area.