气候变化领域集成服务门户(CCPortal): Uplift and Exposure of Serpentinized Massifs: Modeling Differential Serpentinite Diapirism and Exhumation of the Troodos Mantle Sequence, Cyprus

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DOI	10.1029/2020JB021079
	Uplift and Exposure of Serpentinized Massifs: Modeling Differential Serpentinite Diapirism and Exhumation of the Troodos Mantle Sequence, Cyprus
	Evans A.D.; Teagle D.A.H.; Craw D.; Henstock T.J.; Falcon-Suarez I.H.
发表日期	2021
ISSN	21699313
卷号	126 期号:6
英文摘要	Serpentinized mantle peridotites form prominent mountains, including the highest elevations of the Troodos ophiolite in Cyprus (Mount Olympus, 1,952 m), but to date, only qualitative mechanisms have been proposed to explain the uplift of mantle rocks to high altitudes. Serpentinization reactions between mantle rocks and water result in profound changes to the rheology and physical properties of peridotites including significant density reduction (∼900 kg/m3). Field observations, density measurements, and isostatic uplift and erosional modeling provide new constraints on the contribution of serpentinization to the uplift of the Troodos Mantle Sequence. Different serpentinization styles have resulted in two distinct serpentinite domains with contrasting densities. Our modeling shows that the Troodos Mountains can form within the geologically constrained uplift time frame (∼5.5 Myr) exclusively through partial serpentinization reactions. We interpret the serpentinite domains as two nested diapirs that formed due to different extents of serpentinization and density reduction. Differential uplift and exhumation have decoupled the two serpentinite diapirs from the originally overlying ocean crustal rocks. Once at high altitudes the incursion of meteoric water reinforced coupled deformation-alteration-recrystallization processes in the shallow subsurface producing a localized low density completely serpentinized diapir. A second decoupling between the contrasting serpentinite diapirs results in localized differential uplift and exhumation, extruding deep materials to the east of Mount Olympus. Application of our modeling to other serpentinite massifs (e.g., St. Peter and St. Paul Rocks, New Idria, California) highlights the contribution of isostasy to the uplift of serpentinized massifs. © 2021. The Authors.
英文关键词	diapirism; differential exhumation; serpentinization; Troodos ophiolite; uplift
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187048
作者单位	School of Ocean and Earth Science, National Oceanography Centre Southampton, University of Southampton, Southampton, United Kingdom; Department of Geology, University of Otago, Dunedin, New Zealand; Marine Geoscience, National Oceanography Centre, Southampton, United Kingdom
推荐引用方式 GB/T 7714	Evans A.D.,Teagle D.A.H.,Craw D.,et al. Uplift and Exposure of Serpentinized Massifs: Modeling Differential Serpentinite Diapirism and Exhumation of the Troodos Mantle Sequence, Cyprus[J],2021,126(6).
APA	Evans A.D.,Teagle D.A.H.,Craw D.,Henstock T.J.,&Falcon-Suarez I.H..(2021).Uplift and Exposure of Serpentinized Massifs: Modeling Differential Serpentinite Diapirism and Exhumation of the Troodos Mantle Sequence, Cyprus.Journal of Geophysical Research: Solid Earth,126(6).
MLA	Evans A.D.,et al."Uplift and Exposure of Serpentinized Massifs: Modeling Differential Serpentinite Diapirism and Exhumation of the Troodos Mantle Sequence, Cyprus".Journal of Geophysical Research: Solid Earth 126.6(2021).