نتایج جستجو برای: geothermobarometry
تعداد نتایج: 80 فیلتر نتایج به سال:
The Esmaeilabad granitic body with the Late Triassic age is situated in the central part of the Posht-e-Badam block (Central- East Iranian Microcontinent), in the northeastern of the Yazd Province. This granitic body cross cut the metamorphic rocks of the Posht-e-Badam complex and covered by the Cretaceous limestone. Rock forming minerals of the studied granites are K-feldspar (orthoclase), pla...
Considering the high resistance of quartz against stress and alteration, this mineral was chosen for Geothermobarometry in Almogholagh intrusive masses. To determine the temperature and pressure of crystallization of quartz, the amount of Ti contained in the quartz was measured by Electron Microprobe –Analyzer method and then, the pressure and temperature of crystallization of analyzed points w...
Varcheh gabbroic pluton is located in Markazi Province and is part of the Sanandaj-Sirjan zone. This pluton is gabbro to monzo-gabbro of alkaline nature. Based on condrite normalized spider diagrams, the REE pattern displays enrichment of LREE (100 times) and HREE (10 times). In addition, based on primitive mantle normalized spider diagrams, they display enrichment of HFS elements (Zr, Ti, P)....
Gabbroic complex of Soltan Abad is Located about 35 Km east of Sabzevar. According to tectonic classification, the study area is part of Sabzevar ophiolitic zone. The composition of these intrusion bodies are vary from gabbro to gabbro-diorite. The main minerals of gabbroic rocks are plagioclase (bytonite), clino-pyroxene and ortho-pyroxene (enstatit – hyperestene) and accessory minerals are ap...
Abstract The Qinling Orogen, located between the North and South China Blocks, records subduction-collisional orogeny along Paleozoic Shangdan Triassic Mianlue sutures, Mesozoic intracontinental orogenesis, which all played an important role in building present tectonic framework topography. strike-slip Shagou ductile shear zone that overprints suture Belts is crucial for understanding deformat...
The Seve Nappe Complex is a subduction-related high-grade metamorphic unit that was emplaced onto the margin of Baltica during Caledonian orogenesis. In this paper, tectonometamorphic evolution Lower in Scandinavian Caledonides characterized with help continuous Collisional Orogeny (COSC-1) drill core, using combination various P–T estimation techniques based on garnet–quartz mineral pairs (qua...
Crystalline rocks record critical information about the magnitude and rates of geodynamic processes. Important factors such as: how deep; how hot; how fast; and for how long are all in some way encoded in the mineral assemblages, mineral compositions and microstructures. Our ability to estimate metamorphic pressure–temperature (P-T) conditions has improved markedly with the increased availabili...
The mafic and ultramafic igneous rocks of the ophiolitic complex in eastern Birjand) between Sulabest in southern part to north of Gazik in northern part) Have been studied. According to plot of data on diagrams and the result of mineralogy and geochemistry, gabbros and some peridotites belong to cummulate series of spreading sea floor magma (MORB) where some peridotites are of metamorphic (tec...
Pleistocene volcaniclastic turbidites drilled during IODP 340 (U1398B, ≤ 170 mbsf) in the Grenada basin west of Martinique (central Lesser Antilles) have been investigated for sediment provenance. U/Pb ages by ion microprobe from 323 detrital zircon grains at three U1398B levels reveal youngest population maximum which are interpreted to represent major eruption periods. Systematic age progress...
On the basis of geothermobarometric calculations, amphiboles in volcanic and subvolcanic rocks belong to Upper Jurassic volcanism of Sanandaj-sirjan zone in north of Shahrekord. Using Hamarstrom ,Schmidt, Johnson - Rutherford and Hollister methods, amphiboles have crystallized about 635 to 715◦ c and 2.68 to 7.5 kbar at the depth about 17 to 25 km. The result of calculations has moderate accura...
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