吉林大学学报(地球科学版) ›› 2015, Vol. 45 ›› Issue (1): 188-197.doi: 10.13278/j.cnki.jjuese.201501115
胡大千, 王岩泉, 沙茜, 王春光, 陈旭, 马瑞
Hu Daqian, Wang Yanquan, Sha Qian, Wang Chunguang, Chen Xu, Ma Rui
摘要:
使用Renishaw System-1000型激光拉曼光谱仪, 研究了大兴安岭北部上古生界泥质岩石碳质物的拉曼光谱特征及其对形成温度的表征, 探讨了拉曼光谱参数与镜质体反射率(Ro)的关系。研究表明:研究区上古生界泥质岩石碳质物不具有石墨的拉曼光谱谱带吸收峰, 揭示了地层的变质程度未达到低绿片岩相。利用此次经过完善建立的拉曼光谱地质温度计, 对大兴安岭北部上古生界泥质岩石变质温度的估算结果主要为270~320℃, 表明研究区上古生界遭受了极低级变质作用, 变质程度属近变质带。依据碳质物拉曼光谱参数与镜质体反射率的相互关系, 估算研究区有机质成熟度的Ro值主要分布为3.03%~4.23%, 与实测Ro值吻合, 表明有机质演化处于过成熟阶段, 泥质岩石具有生烃的能力, 部分层位可能具有形成油气资源的潜力。
中图分类号:
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