Recognition of Milankovitch Cycles in the Natural Gamma—Ray Logging of Upper Cretaceous Terrestrial Strata in the Songliao Basin

作     者：WU Huaichun ZHANG Shihong SUI Suwen HUANG Qinghua 

作者机构：State Key Laboratory of Geological Processes and Mineral Resources ＆ Key Laboratory of Lithosphere Tectonics and Lithoprobing Technology of Ministry of Education China University of Geosciences Beijing 100083 School of Marine Science China University of Geosciences Beijing 10008 Exploration and Development Research Institute of Daqing Oil Field Corporation Ltd. Daqing Heilongjiang 163712 

出 版 物：《Acta Geologica Sinica(English Edition)》 (地质学报（英文版）)

年 卷 期：2007年第81卷第6期

页      面：996-1001页

核心收录：

学科分类：070903[理学-古生物学与地层学(含：古人类学)] 0709[理学-地质学] 07[理学] 

基　　金：国家重点基础研究发展计划(973计划)(2006CB701406) Program for New Century Excellent Talents University(NCET-04-0727) Research Found of State Key Laboratory of Geological Processes and Mineral Resources(GPMR200651) 

主　　题：Songliao Basin gamma-ray logging Milankovitch cycles marine transgression events 

摘      要：Spectrogram analysis of seven natural gamma-ray logging of Member 1 of the Qingshankou Formation （K2qn^1） and Member 1 and 2 of the Nenjiang Formation （K2n^1-2） of Late Cretaceous age in the Songliao Basin reveals sedimentary cyclicities controlled by Milankovitch climate periodicities. The recognition of Milankovitch cycles allows estimation of an average accumulation rate of ～7.55- 8.62 cm/ka for the K2qn^1 sections, and ～6.69-10.16 cm/ka for the K2n^1-2 sections. Two marine transgression events occurred during the deposition of K2qn^1 and K2n^1-2 and their ages are at ～0.74- 1.10 Ma and ～2.38-4.84 Ma, respectively. Identification of Milankoviteh cycles from fine-grained deep lake sedimentary rocks in the Songliao Basin may provide great potential for high-resolution stratigraphic subdivisions and correlations.