Petrologic evolution of the Gysian ophiolitic serpentinites,NW Iran

扫码查看

原文链接

万方数据
维普

外文摘要：The Gysian ophiolite of NW Iran is located at the intersection of the ophiolite belts of SE Turkey,NE Iraq,and Iran,and provides the opportunity to investigate the pre-served subduction and obduction history of an important tectonic site that has not previously been studied.The ser-pentinized peridotites of the Gysian ophiolite contain the assemblage lizardite+chrysotile+spinel/Mg-spinel with relict clinopyroxene(diopside)and very rare relict orthopy-roxene and olivine.The compositions of clinopyroxenes and spinels are more consistent with the formation of the inferred protolith harzburgites in a fore-arc or supra-subduction zone instead of an abyssal environment.The Gysian ophi-olite is a remnant of the Neo-Tethyan arc-ophiolitic system and records shallow subduction(＜50 km,indicated by the absence of antigorite)in the Late Cretaceous to Paleocene before obduction along thrust faults over the continental margin.We review the spatial trends of the metamorphic grade of the Neo-Tethyan ophiolites in this region and pro-vide detailed information about the petrology and mineral chemistry of the Gysian ophiolite.

外文关键词：

OphioliteNeo-TethyanGysianSerpentiniteIran

作者：

Monir Modjarrad、Donna L.Whitney、Hadi Omrani

展开 >

作者单位：

Department of Geology,Faculty of Sciences,Urmia University,Urmia,Iran

Department of Earth and Environmental Sciences,University of Minnesota,Minneapolis,MN,USA

Department of Geology,Faculty of Sciences,Golestan University,Gorgān,Iran

出版年：

2024

DOI：