GSTDTAP  > 气候变化
DOI10.1029/2020GL091501
Frequent Polarity Reversals in the Cretaceous Normal Superchron
Dawen Zhang; Maodu Yan; Chunhui Song; Weilin Zhang; Xiaomin Fang; Bingshuai Li
2021-02-16
发表期刊Geophysical Research Letters
出版年2021
英文摘要

The Cretaceous Normal Superchron (CNS), defined as a magnetic quiet zone spanning from ∼126 to ∼84 Myr, is often used to understand the Earth's geodynamo processes. However, whether there were polarity reversals within the CNS remains contentious. This paper presents the youngest detrital zircon U‐Pb age‐constrained magnetostratigraphic study of the Cretaceous Khorat Group for two sections (i.e., Ban Phonngam (BP) and Ban Nongpen (BN)) in Vientiane, Laos. Both sections are characterized by the prominent long normal‐polarity zones that are correlated to the CNS. Interestingly, six (four) short primary reversed horizons were identified within the BP (BN) section. Integrated with other reported reversed events, there likely at least five globally and two single reported reversed‐polarity events or clusters of events have happened within the CNS. The confirmation of frequent reversed polarities within the two parallel sections will provide a new comprehensive understanding of the Earth's geodynamic behavior during the CNS.

领域气候变化
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文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/315704
专题气候变化
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GB/T 7714
Dawen Zhang,Maodu Yan,Chunhui Song,et al. Frequent Polarity Reversals in the Cretaceous Normal Superchron[J]. Geophysical Research Letters,2021.
APA Dawen Zhang,Maodu Yan,Chunhui Song,Weilin Zhang,Xiaomin Fang,&Bingshuai Li.(2021).Frequent Polarity Reversals in the Cretaceous Normal Superchron.Geophysical Research Letters.
MLA Dawen Zhang,et al."Frequent Polarity Reversals in the Cretaceous Normal Superchron".Geophysical Research Letters (2021).
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