罗布泊第四纪含盐系成岩作用特征研究

Characteristics of Diagenesis of the Quaternary Salt-Bearing Strata, Lop Nur Lake, Xinjiang

依据大量钻孔岩心与薄片的详细观察描述 ,对罗布泊罗北凹地第四纪含盐系盐层及储卤盐层的成岩作用变化进行深入研究。发现含盐系盐层内广泛出现各种成岩变化 ,主要是压榨作用、溶蚀作用、重结晶作用、交代作用、胶结作用及断裂构造作用等。它们对地层储集卤水能力产生巨大影响。这些成岩作用与晶间流体的活动有密切关系。同时引入“成岩作用相”的概念 ,探讨其在富钾卤水资源评价上的作用和意义。

According to the detailed observation of lots of rock core and sediment samples from drilled-holes and playa, authors have conducted a deeper research on diagenesis of the Quaternary salt strata of Luobei depression, Lop Nur lake. The studies showed that various kinds of diagenesis had occurred in the Quaternary salt-bearing strata, mainly including compaction, dissolution, re-crystallization, replacement, cementation, and fracturing. These actions exerted an enormous influence on the ability of strata holding brine. And their activities are closely related to the inter-crystalline fluid movement. Meanwhile, the “ diagenesis phrase” has been proposed, and its significance and role are also probed for assessing potash-bearing brine resources.