摘要
在柴达木盆地阿尔金斜坡第三系地层中,砂岩中碳酸盐重结晶强烈、压实程度弱、石英自生加大较弱、早期碳酸盐胶结物发育。碳酸盐主要为无机成因,少量与生物气有关,其含量受盐度的影响。泥岩中粘土矿物以伊利石、绿泥石和伊蒙混层为主,缺少蒙脱石和高岭石,随埋深增加,伊利石相对含量变化无规律可循,绿泥石相对含量减少,推测伊利石主要为陆源成因。
The Tertiary in the Aerjin Slope in Caidam Basin is characterized by strong carbonate recrystallization, weak compaction, weak quartz overgrowth and enrichment of the early-stage carbonate. The carbonate cement, influenced by the salinity to some degree,is mainly inorganic with few relation to biogas. In muds clay assemblage is illite-illite/montmorillonite-chlorite. With the increase of depth the relative content of illite fluctuates and that of chlorite decreases. The illite may be terrestrial origin.
出处
《沉积学报》
CAS
CSCD
北大核心
1998年第1期127-131,共5页
Acta Sedimentologica Sinica