中国坡缕石粘土矿床成因类型

根据坡缕石粘土的产状和成矿作用,将我国坡缕石粘土矿床划分为5种成因类型:(1)玄武质火山岩成岩蚀变型;(2)火山沉积型;(3)内陆湖相沉积型;(4)岩浆热液型;(5)表生淋滤型。本文初步总结了各类型的地质特征,阐述了主要元素、微量元素、稀土元素和稳定同位素等的地球化学特征,探讨了形成坡缕石粘土的物理化学条件和成矿机理。

GENETIC TYPES OF PALYGORSKITE CLAY DEPOSITS IN CHIAN

On the basis of die mineralization and die occurrence of die palygotskite days, die palygorskite day deposits in China might be gentically grouped into five types : (1)the basaltic volcanic rock lithogenic alteration type; (2)the volcanic sedimentary type; (3)the lacustrine fades clastic sedimentary typet (4)the hydrothermal type; (5)die hypergene filling type. The paper summarized die geological characteristics of various genetic types, elucidated the geochemical featuers of main elements, minor elements, REE, and steady isotope etc., and discussed the physical-chemical conditions and the minerogenetic mechanism for the formation of palygorskite clays.