| Recognition of Milankovitch Cycles in the Natural Gamma—Ray Logging of Upper Cretaceous Terrestrial Strata in the Songliao Basin |
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| 作者姓名： | WU Huaichun ZHANG Shihong SUI Suwen HUANG Qinghua |
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| 作者单位： | 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;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;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;Exploration and Development Research Institute of Daqing Oil Field Corporation Ltd., Daqing, Heilongjiang 163712 |
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| 基金项目： | This study was jointly supported by the National Key Basic Research Development Program of China (Grant 2006CB701406), Program for New Century Excellent Talents University (Grant NCET-04-0727), and Research Found of State Key Laboratory of Geological Processes and Mineral Resources (Grant GPMR200651). |
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| 摘 要： | Spectrogram analysis of seven natural gamma-ray logging of Member 1 of the Qingshankou Formation (K2qn1) and Member 1 and 2 of the Nenjiang Formation (K2n1-2) 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 K2qn1 sections, and ~6.69–10.16 cm/ka for the K2n1-2 sections. Two marine transgression events occurred during the deposition of K2qn1 and K2n1-2 and their ages are at ~0.74–1.10 Ma and ~2.38–4.84 Ma, respectively. Identification of Milankovitch cycles from fine-grained deep lake sedimentary rocks in the Songliao Basin may provide great potential for high-resolution stratigraphic subdivisions and correlations.
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| 关 键 词： | Songliao Basin gamma-ray logging Milankovitch cycles marine transgression events |
| 收稿时间： | 2007/8/25 0:00:00 |
| 修稿时间： | 2007/9/25 0:00:00 |
Recognition of Milankovitch Cycles in the Natural Gamma-Ray Logging of Upper Cretaceous Terrestrial Strata in the Songliao Basin |
| |
| Authors: | WU Huaichun ZHANG Shihong SUI Suwen HUANG Qinghua |
| |
| Abstract: | Spectrogram analysis of seven natural gamma-ray logging of Member 1 of the Qingshankou Formation (K2qn1) and Member 1 and 2 of the Nenjiang Formation (K2n1-2) 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 K2qn1 sections, and ～6.69-10.16 cm/ka for the K2n1-2 sections. Two marine transgression events occurred during the deposition of K2qn1 and K2n1-2 and their ages are at ～0.74-1.10 Ma and ～2.38-4.84 Ma, respectively. Identification of Milankovitch cycles from fine-grained deep lake sedimentary rocks in the Songliao Basin may provide great potential for high-resolution stratigraphic subdivisions and correlations. |
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| Keywords: | Songliao Basin gamma-ray logging Milankovitch cycles marine transgression events |
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