Study on Diagenesis in the Slope of the Saline Lake Basin:An Example From the Tertiary of the Aer jin Slope in Caidam Basin
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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。Abstract: 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 ce-ment,influenced by the salinity to some degree,is mainly inorganic with few relation to biogas. In muds clayassemblage is illite-illite/montmorillonite-chlorite. With the increase of depth the relative content of illite fluc-tuates and that of chlorite decreases. The illite may be terrestrial origin.
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Key words:
- salt lake /
- diagenesis /
- carbonate /
- salinity /
- clay mineral /
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[1] 1 黄杏珍,邵宏舜,顾树松等.柴达木盆地的油气形成与寻找油气田方向,兰州:甘肃科学技术出版社,1993. 80-106
2 Weaver C E. C1ays,Muds,and Shales. Elsevier Science PublishingCompany Inc. 1989. 270---278
3 华保钦,林锡祥.柴达木盆地异常地层压力及其成因探讨.沉积学报,1983,1(4061-78
4 于升松·柴达木盆地盐湖水化学特征,海洋与湖沼.1984,1(40340---358
5 徐放.柴达木盆地某些盐湖沉积剖面中粘土矿物的初步研究.沉积学报.1983,1(30 123-128 -

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