豫西渑池地区寒武纪馒头组叠层石中的分子化石  

Molecular fossils from stromatolites of Mantou formation of Cambrian in Mianci area in western Henan Province

作　　者：齐永安[1,2] 张珍[1,2] 郑伟[1,2] 代明月[1,2] 

机构地区：[1]河南理工大学资源环境学院,河南焦作454000 [2]河南省生物遗迹与成矿过程重点实验室,河南焦作454000

出　　处：《河南理工大学学报（自然科学版）》2015年第1期40-45,共6页Journal of Henan Polytechnic University（Natural Science）

基　　金：国家自然科学基金资助项目(41072003;4120207);河南省基础与前沿项目(112300413213);高校博士点基金博导类联合课题(20114116110001);国家自然基金-河南省人才基金资助项目(U1404406)

摘　　要：探索性地利用GC-MS技术检测豫西渑池地区寒武纪馒头组叠层石中分子化石的组成,并探讨其来源及分布特征。研究结果表明:叠层石各样品中主要的分子化石有正构烷烃、类异戊二烯烃和部分萜类化合物和甾类化合物等。依据主碳峰、碳优势指数、Pr/Ph值以及支链烷烃等分子化石参数,叠层石中沉积有机质的重要输入源主要指示为蓝藻类和细菌,低Pr/Ph值(<0.61)指示当时沉积环境可能为较强的还原环境。这些研究结果为深入研究豫西渑池地区寒武纪叠层石的微生物组成及其分子化石特征提供了帮助。The composition of molecular fossils in stromatolites of the Mantou formation of Cambrian in western Henan Province, has been detected by GC-MS and their origin and distribution have been discussed. The re- sults show that the main molecular fossils contain n-alkanes, isoprenoid alkanes, some terpenoids, and steranes. The main sources of bio-input of stromatolites are bacteria and algae on the basis of compositional characteristics of Cmax, CPI, Pr/Ph, and branched alkanes. The lower values of Pr/Ph （ 〈0.61 in these samples） show that the stromatolites were formed in relatively strong reducing environments. The results are useful for the study of microbial compositions and molecular fossil characteristics in stromatolites of Cambrian in western Henan Province.

关 键 词：叠层石 寒武纪 渑池 分子化石 

分 类 号：P593[天文地球—地球化学] P52[天文地球—地质学]