我国地洼型造山-造盆作用与硅藻土成矿

RELATIONSHIP BETWEEN METALLOGENESIS OF DIATOMACEOUS EARTH AND BASIN-RANGEFORMING PROCESS

本文从盆-山体系演化的角度,探讨了我国地洼型造山-造盆作用与硅藻土成矿关系。研1)硅藻对成矿盆地表现出了一定的选择性,通常只有侧生或伴生型微型地洼盆地才2)地洼期盆-山耦合过程引起的气候效应对我国陆相硅藻土成矿起着积极;3)地洼期盆-山活动性直接控制着硅藻土成矿,盆-山体系的相对稳定有利于高质量硅藻;4)盆-山转换过程中,成矿期后的盆地抬升对硅藻土矿层的保存是相对有利的。

Through studying on the relationshi p between metallogeny of diatomaceous earth(DE)and diwa-type basin-range forming p rocess,it shows that 1)selectivity for ore-forming basin o f DE is represented,generally,only l aterrogenic or companion minitype b asins of diwa type are in favor of ore formation of DE;2)influence on ore formation of DE for t ectonic-climate effect caused by coupling of basin-range of diwa period is very prominent ;3)characteristics and quality of ore formation of DE are dir ectly controlled by the basin-range activity of diwa period,the quality of ore is of direc t correlation with the stability of b asin-range;4)the uplifting of basin is relatively ben eficial for the keeping of ores durin g the range-basin trans-forming process after ore-forming p eriod.