نتایج جستجو برای: baft ophiolite mélange

تعداد نتایج: 1720  

محمدی, سیدسعید, زرین کوب, محمدحسین , سلیمی, زهره ,

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...

2017
Reza Vahidi Siyavash Joukar

Department of Veterinary Sciences, Baft Branch, Islamic Azad University, Baft, Iran, Cardiovascular Research Center, Institute of Basic and Clinical Physiology Sciences, Kerman University of Medical Sciences, Kerman, Iran, Department of Physiology and Pharmacology, School of Medicine, Kerman University of Medical Sciences, Kerman, Iran, 4 Physiology Research Center, Institute of Neuropharmacolo...

Journal: :International Journal of Earth Sciences 2023

Abstract In the southeastern part of Chios Island, Greece, exotic blocks amphibolites and serpentinized peridotite can be found within a narrow, approximately N–S elongated area adjacent to non-metamorphosed sedimentary strata Triassic age its west Cenozoic east. this work, we present for first time petrological mineral chemical data ultramafic rock fragments from SE describe their possible ori...

Journal: :Geological Magazine 2022

Abstract Ophiolitic mélanges in Anatolia represent Mesozoic subduction-accretion complexes, which are unusually poor land-derived coarse-clastic rocks. A segment of the ophiolitic mélange Beynam region south Ankara was studied. The consists three accretionary units (AUs), distinguished by lithology, structure, age and geochemistry. At base there is a serpentinite mélange, overlain semi-intact U...

Journal: :Minerals 2022

The Shiquanhe–Laguoco–Yongzhu–Jiali ophiolite mélange belt in Tibet includes the Laguoco Tso as part of its western segment. Researchers studying evolution Tibetan Plateau and Tethys have taken a keen interest debated relationship between this Bangong–Nujiang belt. However, there is little research field. This study reports rock geochemistry, SIMS (the secondary ion mass spectrometry) zircon U-...

2010
R. A. Harris

Structural field relations, petrologic and geochemical studies, and radiometric age aualysis of metamorphic rocks at the base of the Brooks Range ophiolite provide a record of the time, tectonic setting, and initial conditions of ophiolite emplacement during the Middle Jurassic western Brookian orogeny. The metamorphic sole of the Misheguk, Siniktanneyak, and Avan Hills ophiolite bodies is tran...

Journal: :Science 1994
B R Hacker

(40)Ar/(39)Ar dates of emplacement-related metamorphic rocks beneath the Samail ophiolite in Oman show that cooling to <525 degrees C occurred within approximately 1 million years of igneous crystallization of the ophiolite. This unexpectedly short time span and rapid cooling means that old, cold continental or oceanic lithosphere must have been adjacent to the ophiolite during spreading and th...

ترابی, قدرت, رجبی, ثمینه,

The Surk ophiolitic mélange is located at the south west of central Iran and along the Naein-Dehshir-Baft ophiolitic belt. In petrological sequence, peridotites are nominated the undermost part of rock unit, and then gabbros and volcanic rocks are at the following ranks respectively. The predominant peridotitet of this ophiolitic mélange is harzburgite. Lherzolite that is the primitive mantle r...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید