نتایج جستجو برای: mélange
تعداد نتایج: 613 فیلتر نتایج به سال:
The Tibetan Plateau holds clues to understanding the dynamics and mechanisms associated with continental growth. Part of the region is characterized by zones of ophiolitic mélange believed to represent the remnants of ancient oceanic crust and underlying upper mantle emplaced during oceanic closures. However, due to the remoteness of the region and the inhospitable terrain many areas have not r...
The study area is located in northwest of Birjand, northern part of the Sistan suture zone in eastern Iran. There is well preserved outcrops of an ophiolite mélange in this area. This complex is composed of harzburgite, layered gabbro and spilitic basalt with flysch type rocks. Microprobe analyses of olivine, clinopyroxene, orthopyroxene and spinel in harzburgites show that olivine is forsterit...
CORRECTION article Front. Earth Sci., 15 June 2023Sec. and Planetary Materials Volume 11 - 2023 | https://doi.org/10.3389/feart.2023.1233852
Abstract This study of Sr-Nd initial isotopic ratios plutons from the North Patagonian batholith (Argentina and Chile) revealed that a secular evolution spanning 180 m.y., Jurassic to Neogene, can be established in terms magma sources, which turn are correlated with changes tectonic regime. The provenance composition end-member components source magmas represented by (87Sr/86Sr 143Nd/144Nd) plu...
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