研究进展

王振胜等,GEOLOGY-2022

发表时间:2022-06-22来源:ok138太阳集团中国官方网站点击:

Long-lasting viscous drainage of eclogites from the cratonic lithospheric mantle after Archean subduction stacking

作者:

Wang, ZS (Wang, Zhensheng) [1] , [2] ; Kusky, TM (Kusky, Timothy M.) [1] , [2] , [3] ; Wang, L (Wang, Lu) [1] , [2]

GEOLOGY

50

5

583-587

DOI

10.1130/G49793.1

出版时间

MAY 1 2022

已索引

2022-05-16

文献类型

Article

摘要

The origin of early continental lithosphere is enigmatic. Characteristics of eclogitic components in the cratonic lithospheric mantle (CLM) indicate that some CLM was likely constructed by stacking of subducted oceanic lithosphere in the Archean. However, the dynamic process of converting high-density, eclogite-bearing subducted oceanic lithosphere to buoyant CLM remains unclear. We investigate this process through numerical modeling and show that some subducted and stacked eclogites can be segregated into the asthenosphere through an episodic viscous drainage process lasting billions of years. This process increases the chemical buoyancy of the CLM, stabilizes the CLM, and promotes the preservation and redistribution of the eclogites in the CLM, explaining the current status of early subduction relicts in the CLM revealed by geophysical and petrological studies. Our results also demonstrate that the subduction stacking hypothesis does not conflict with the longevity of CLM.

关键词

作者信息

通讯作者地址

Wang, Zhensheng ; Kusky, Timothy M.

(通讯作者)

China Univ Geosci, Sch Earth Sci, State Key Lab Geol Proc & Mineral Resources, Wuhan 430074, Peoples R China

通讯作者地址

Wang, Zhensheng;Kusky, Timothy M .

(通讯作者)

China Univ Geosci, Sch Earth Sci, Ctr Global Tecton, Wuhan 430074, Peoples R China

通讯作者地址

Kusky, Timothy M.

(通讯作者)

China Univ Geosci, Three Gorges Res Ctr Geohazards, Wuhan 430074, Peoples R China

类别/分类

研究方向

Geology