globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2017.08.018
论文题名:
Astrochronology of the Middle Jurassic Buqu Formation (Tibet, China) and its implications for the Bathonian time scale
作者: Cheng L.; Wang J.; Wan Y.; Fu X.; Zhong L.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2017
语种: 英语
英文关键词: Bathonian ; Cyclostratigraphy ; Floating astronomical time scale ; Gamma ray
英文摘要: The Buqu Formation in Qiangtang Basin in China was formed during the Bathonian Stage of the Middle Jurassic. The subject of this study is the formation at Well QZ11 at a depth of from 34 to 591. m, located in the Southern Depression of Qiangtang Basin. The optimal accumulation rate from the result of ASM analysis was used as the "target" to tune the GR (gamma ray) and DLR (double lateral resistivity) series in QZ11. Power spectra analysis in tuned GR and DLR series demonstrate the existence of a series of prominent astronomical periods within the Buqu Formation in the Qiangtang Basin. Then ~. 100. kyr bandpass filtered curve was used to establish a floating astronomical time scale for the Buqu Formation, and the maximum and minimum sedimentation rates without considering the factor of formation compaction were 150. m/Myr and 395. m/Myr, respectively. Using this scale, the lower limit for the duration of the formation is estimated to be approximately 2.09. Myr. This duration can serve as a reference for temporal and chronological calibrations of the Bathonian Stage. © 2017.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68113
Appears in Collections:过去全球变化的重建

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作者单位: School of Geosciences, Chengdu University of Technology, Chengdu, Sichuan 610059, China; Chengdu Geological Survey Center, China Geological Survey, Chengdu, Sichuan 610081, China; Key Laboratory for Sedimentary Basin and Petroleum Resources, Ministry of Land and Resources, Chengdu, Sichuan 610081, China; Energy Resources College of Chengdu Technology University, Chengdu, Sichuan 610059, China

Recommended Citation:
Cheng L.,Wang J.,Wan Y.,et al. Astrochronology of the Middle Jurassic Buqu Formation (Tibet, China) and its implications for the Bathonian time scale[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2017-01-01
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