松辽盆地白垩系青山口阶缺氧事件层的有机地球化学特征

地学前缘 ›› 2009, Vol. 16 ›› Issue (6): 96-103.

松辽盆地白垩系青山口阶缺氧事件层的有机地球化学特征

孔惠,黄永建,黄清华,张文婧,谢磊,刘学红,谢晓云

1大庆油田有限责任公司勘探开发研究院,黑龙江大庆 163712
2中国地质大学(北京) 青藏高原地质研究中心, 北京 100083
3大庆油田有限责任公司大庆钻探工程公司地质录井一公司, 黑龙江大庆 163411
4大庆油田有限责任公司第一采油厂, 黑龙江大庆 163162

收稿日期:2009-06-25 修回日期:2009-11-08 出版日期:2009-12-16 发布日期:2009-12-10
作者简介:孔惠(1962—),女,工程师,主要从事古生物与地层研究工作。Email: konghui@petrochina.com.cn
基金资助:
国家重点基础研究发展计划“973”项目(2006CB701403);国家自然科学基金项目(40802012)

Organic geochemical characteristics of anoxic levels in the Cretaceous Qingshankou Formation of Songliao Basin.

KONG Hui, HUANG Yong-Jian, HUANG Qing-Hua, ZHANG Wen-Jing, XIE Lei, LIU Hua-Gong, XIE Xiao-Yun

1,Huang Yongjian2,Huang Qinghua1,Zhang Wenjing1,Xie Lei3,Liu Xuehong4,
Xie Xiaoyun11Exploration and Development Research Institute of Daqing Oilfield Company Ltd., Daqing 163712, China
2Research Center for Tibetan Plateau Geology, China University of Geosciences(Beijing), Beijing 100083, China
3No1 Company of Well Log, Daqing Drilling Engineering Corporation of Daqing Oilfield Company Ltd., Daqing 163411, China
4No1 Oil Production Company of Daqing Oilfield Company Ltd., Daqing 163162, China

Received:2009-06-25 Revised:2009-11-08 Online:2009-12-16 Published:2009-12-10

摘要/Abstract

摘要：

松辽盆地白垩系青山口阶下部广泛分布一套富含有机碳的黑色泥岩、页岩沉积,它具有干酪根碳同位素正偏、重排甾烷含量低,普遍存在伽马蜡烷生物标志化合物等有机地球化学特征,代表了白垩纪温室效应时间窗内古湖泊贫氧环境条件下的沉积产物。结合生物地层研究成果,认为青山口阶下部曾发生过古湖泊缺氧事件,其层位大体可与白垩纪古海洋CenomanianTuronian界线事件层进行对比,由此提出了松辽盆地青山口阶下部的时代归属于晚白垩世Cenomanian晚期—Turonian早期的新观点。

关键词: 黑色页岩;碳同位素;生物标志物;缺氧事件;青山口组;白垩系;松辽盆地

Abstract:

The Songliao Basin was a big lake during the midCretaceous, where dark mudstones and shales of the Qingshankou Formation were distributed in the basin. The dark mudstones and shales in the Member 1 of the Qingshankou Formation are of high organic carbon and low diasteranes contents. Organic geochemical characteristics are illustrated by biomarkers of 28, 30bisnorhopane and gammacerane, and positive excursion of kerogen isotopes. It is suggested that the dark mudstones and shales in the Member 1 of the Qingshankou Formation are the products of lake anoxic event in the extreme greenhouse climate period. Based on the study of biostratigraphy and anoxic eventstratigraphy, we propose that the Qingshankou Formation may correspond to the oceanic anoxic event at the CenomanianTuronian boundary in the Cretaceous, and the age of the Qingshankou Formation in the Songliao Basin is the Late Cenomanian to the Early Turonian.

Key words: Key words: dark shales; carbon isotope; biomarkers; anoxic events; Qingshankou Formation; Cretaceous; Songliao Basin

孔惠黄永建黄清华张文婧谢磊刘学红谢晓云. 松辽盆地白垩系青山口阶缺氧事件层的有机地球化学特征[J]. 地学前缘, 2009, 16(6): 96-103.

KONG Hui, HUANG Yong-Jian, HUANG Qing-Hua, ZHANG Wen-Jing, XIE Lei, LIU Hua-Gong, XIE Xiao-Yun. Organic geochemical characteristics of anoxic levels in the Cretaceous Qingshankou Formation of Songliao Basin.[J]. Earth Science Frontiers, 2009, 16(6): 96-103.