• 责任者：Sun Wei (Chengdu Institute of Geology and Mineral Resources ; Chengdu 610081 ; China) ; Chen Ming
• 刊名：Sedimentary Geology and Tethyan Geology
• 出版年：2013
• 卷期：22(2)
• 关键词：生物作用 ; biogenic processes ; 礁 ; reefs ; 羌塘盆地 ; Qiangtang Basin
• 页码：p.52-58
• 图表：illus., 2 tables, 24 refs.
• 分类号：0803
• issnNo：ISSN1009-3850
• isbnNo：CN51-1593/P

The evaluation of diagenetic alteration of marine carbonate rocks and the preservation of coeval sea water information has long been a negligible field. The examination of microscopic fabrics, cathodoluminescence images, trace elements and isotopes in the Upper Jurassic - Lower Cretaceous biohermal carbonate rock samples from the Bandaohu region, Qiangtang Basin has disclosed that these samples are characterized by low Mn and high Sr contents, low Mn/Sr ratios, and limited range of δ13C and δ18O values. The preservation of coeval sea water information tends to become progressively worse in the sequence of bioclastic micritic limestone→micritic grainy limestone→grainy micritic limestone→wall rocks of reefal limestone→skeletal frameworks of reefal limestone.