试论盐系中泥砾岩成因  

ON ORIGINATION OF CLAY CONGLOMERATE ASSOCIATED WITH SALT SEQUENCES

作　　者：曲懿华 

出　　处：《化工矿产地质》1997年第3期162-166,共5页Geology of Chemical Minerals

摘　　要：盐系中伴生泥砾岩的形成主要与成盐期中、期后强烈的构造活动和风化作用有关。伴随着火山活动和热流体渗入的地震活动引起厚盐层及其间碎屑岩层发生扰动、断裂、破碎塑流等形变，导致塑性岩盐胶结的泥砾岩层的形成。兰坪思茅盆地盐系中普遍发育有泥砾岩，可具一定代表性。我国一些具有泥砾岩成因的盐盆地，按泥砾与胶结物盐类矿物的形成时间可分为３类：（１）同沉积泥砾岩（地震成因为主，还包括少量风浪冲刷的湖岸沉积物）；（２）后期盐体塑流泥砾岩；（３）含盐地层风化泥砾岩淋滤。Clay conglomerate associated with a series of salt rocks has generally a close genetic tie to tectonic events during and following the deposition of those rocks. It is originated by plastic salt materials cementing interbedded clastic materials in the presense of tectonic activities like earthquakes which disturbed and cracked the massive salt sequances and the in between clastic rocks to cause plastic flow of materials. Representative of that is the salt sequences in the Lanping Simao salt basin in China. According to forming times of the clay gravels and salt cements, the country's clay conglomerate may be typed differently as ⑴ synsedimentary (the clay gravels, besides those earthquake formed, are related locally to wave washing against on shore sediments), ⑵ late plastic flow formed and ⑶ salt rock weathered.

关 键 词：盐系 泥砾岩 岩石成因 盆地 

分 类 号：P588.212.5[天文地球—岩石学]