气候变化领域集成服务门户(CCPortal): Temporal variations in the dynamic evolution of an overriding plate: Evidence from the Wulong area in the eastern North China Craton, China

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DOI	10.1130/B35465.1
	Temporal variations in the dynamic evolution of an overriding plate: Evidence from the Wulong area in the eastern North China Craton, China
	Zhang S.; Zhu G.; Xiao S.; Su N.; Liu C.; Wu X.; Yin H.; Li Y.; Lu Y.
发表日期	2020
ISSN	167606
起始页码	2023
结束页码	2042
卷号	132 期号:2021-09-10
英文摘要	The evolution of overriding-plate deformation, and the mechanisms responsible for this deformation, are debated. One area where these processes can be investigated is the eastern North China Craton (NCC) in China, which was situated in an overriding-plate position relative to the subducting Paleo-Pacific Plate during the Jurassic and Cretaceous. Here we constrain the structural evolution of the Jurassic and Cretaceous using new structural, stress field, and geochronological data from the Wulong area. The results show that the first phase of deformation (D1) produced a series of SE-dipping reverse shear zones and parallel folds in response to NW-SE shortening at 157-146 Ma (Late Jurassic). Based on microscopic observations and quartz c-axis analysis, it is suggested that the temperature during D1 deformation was 500 ± 50 °C. A second phase of contractional deformation (D2) at 146-132 Ma (earliest Early Cretaceous) gave rise to numerous NE-SW-striking sinistral faults and shear zones. The majority of D2 structures display ductile fabrics in the southwest of the Wulong area and brittle deformational features in the northeast, thus indicating enhanced exhumation in the former area. Microstructures of D2 sinistral shear zones indicate deformation temperatures of 300-400 °C. Inversion of fault slip data from the sinistral faults demonstrate that N-S compression was responsible for the D2 structures. The third phase of deformation (D3) was related to WNW-ESE extension during the middle to late Early Cretaceous (132-100 Ma). This extensional phase produced a series of NE-SW-striking normal faults and reactivated pre-existing structures. Dikes and plutons were emplaced during the D3 deformation, synchronous with the peak destruction of the NCC. Our results indicate that the eastern NCC showed temporal variations in stress and strain during the Jurassic and Cretaceous. Consistent with the slab-driven model, we suggest that this behavior represents the response of the overriding-plate to changes in subduction kinematics. © 2019 Geological Society of America.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184719
作者单位	School of Resource and Environmental Engineering, Hefei University of Technology, Hefei, 230009, China
推荐引用方式 GB/T 7714	Zhang S.,Zhu G.,Xiao S.,et al. Temporal variations in the dynamic evolution of an overriding plate: Evidence from the Wulong area in the eastern North China Craton, China[J],2020,132(2021-09-10).
APA	Zhang S..,Zhu G..,Xiao S..,Su N..,Liu C..,...&Lu Y..(2020).Temporal variations in the dynamic evolution of an overriding plate: Evidence from the Wulong area in the eastern North China Craton, China.Bulletin of the Geological Society of America,132(2021-09-10).
MLA	Zhang S.,et al."Temporal variations in the dynamic evolution of an overriding plate: Evidence from the Wulong area in the eastern North China Craton, China".Bulletin of the Geological Society of America 132.2021-09-10(2020).