气候变化领域集成服务门户(CCPortal): Brittle Deformation of Carbonated Peridotite—Insights From Listvenites of the Samail Ophiolite (Oman Drilling Project Hole BT1B)

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DOI	10.1029/2020JB020199
	Brittle Deformation of Carbonated Peridotite—Insights From Listvenites of the Samail Ophiolite (Oman Drilling Project Hole BT1B)
	Menzel M.D.; Urai J.L.; de Obeso J.C.; Kotowski A.; Manning C.E.; Kelemen P.B.; Kettermann M.; Jesus A.P.; Harigane Y.; the Oman Drilling Project Phase 1 Science Team
发表日期	2020
ISSN	21699313
卷号	125 期号:10
英文摘要	Hole BT1B of the Oman Drilling Project provides a continuous sampling from listvenite into the metamorphic sole that preserves the deformation, hydration, and carbonation processes of oceanic mantle peridotite at the base of the Samail ophiolite, Oman. We present evidence of multistage brittle deformation in listvenites and serpentinites based on field observations, visual core logging and petrography. About 10 vol% of listvenite and serpentinite in Hole BT1B is composed of cataclasite bands. Cataclasites contain lithic clasts of listvenite with spheroidal, zoned magnesite and quartz, and fragments of chalcedony-carbonate veins that elsewhere crosscut listvenite—showing that cataclasis postdates listvenite formation. Locally the cataclasites are reworked and cut by thin, sharp faults, pointing to repeated reactivation of brittle structures. SEM-EDS mapping shows that cataclasis was related to dissolution of carbonate and/or silica cementation. Dolomite veins crosscut cataclasites and breccias, suggesting that part of the Ca gain in BT1B is related to late fluids after listvenite formation. These results indicate a multistage tectonic overprint after peridotite carbonation and listvenite formation, which may be related to the tectonic history of the deformed continental margin under the ophiolite. These relatively late brittle structures should be excluded when trying to understand the carbonation of peridotite to listvenite. ©2020. The Authors.
英文关键词	cataclasite; Oman Drilling Project; ophiolite obduction; peridotite carbonation
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/187562
作者单位	Institute of Tectonics and Geodynamics, RWTH Aachen University, Aachen, Germany; Department of Applied Geosciences, German University of Technology (GUtech), Muscat, Oman; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; Now at Department of Earth and Planetary Sciences, McGill University, Montreal, QC, Canada; Dept. of Earth & Space Sciences, University of California, Los Angeles, CA, United States; Department of Geodynamics and Sedimentology, University of Vienna, Vienna, Austria; Now at Instituto Dom Luiz (IDL), Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal; Institute of Geology and Geoinformation, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology, Tsukuba, Japan
推荐引用方式 GB/T 7714	Menzel M.D.,Urai J.L.,de Obeso J.C.,等. Brittle Deformation of Carbonated Peridotite—Insights From Listvenites of the Samail Ophiolite (Oman Drilling Project Hole BT1B)[J],2020,125(10).
APA	Menzel M.D..,Urai J.L..,de Obeso J.C..,Kotowski A..,Manning C.E..,...&the Oman Drilling Project Phase 1 Science Team.(2020).Brittle Deformation of Carbonated Peridotite—Insights From Listvenites of the Samail Ophiolite (Oman Drilling Project Hole BT1B).Journal of Geophysical Research: Solid Earth,125(10).
MLA	Menzel M.D.,et al."Brittle Deformation of Carbonated Peridotite—Insights From Listvenites of the Samail Ophiolite (Oman Drilling Project Hole BT1B)".Journal of Geophysical Research: Solid Earth 125.10(2020).