نتایج جستجو برای: basaltic composition

تعداد نتایج: 261472  

تقی‌پور, صدیقه, تقی‌پور, بتول ,

Kaj-Rostam Abad, Dashtak and Do Ab salt domes are located around Ardal and Farsoun village. This area is situated in High Zagros range (Chaharmahal and Bakhtiary Province). The study area is composed of Lower Cambrian volcano sedimentary complex including basalt, basaltic andesite, andesite, trachyte, pyroclastics, evaporite rocks and Precambrian sedimentary units. According to the mineralogica...

2008
A. D. Rogers O. Aharonson

[1] Constraints on the mineralogical composition of low-albedo, low-sulfur sands at Meridiani Planum are determined from Mars Exploration Rover (MER) Opportunity Miniature Thermal Emission Spectrometer (Mini-TES), Mössbauer, and Alpha Proton X–Ray Spectrometer measurements. Results of this work show that the sand is olivine basaltic in composition, with minor amounts of sulfate and a high-silic...

آلیانی, فرهاد, عباسلو, زهرا, علیرضایی, علی , مرادیان, عباس ,

The study area is located in Central Iranian volcano-plutonic copper belt (Dehaj-Sarduiyeh belt) about 42 Km northeast of Shahrbabak in Kerman Province. Based on petrographic studies, extrusive rocks have the composition from trachyandesite, andesite basaltic and andesite to dacite with Eocene age. Mineralogically, the rocks contain plagioclase, amphibole, biotite and quartz. Chlorite, calcite,...

تقی پور, صدیقه, مکی زاده, محمد علی, ترابی, قدرت , تقی‌پور, بتول , خلیلی, محمود, نقره‌ئیان, موسی ,

Several igneous-evaporitic rocks complexes, belonging to Lower Cambrian, are exposed in High Zagros. These rocks exposed parallel to the Zagros main thrust as diapir-shaped bodies. Basaltic rocks are the most common rocks but microgabbro, microdiorite, andesite and trachyte are the rocks of this complex. The studied clinopyroxenes are usually fresh mafic mineral in these rocks and display secto...

2016
Rodrigo Torres Cardoso Alexandre Kannebley de Oliveira Julio Cesar Garavello

This work aimed to study the composition and distribution of fish species at four sites along Cabeça River, an affluent of Corumbataı́ River, tributary of Tietê River, intending to better understand the influence of local geomorphology on the occurrence of the species along the river. Using gill nets, trawl net, cast net and sieves, five samples were taken from each site every two months. These ...

2004
Paul J. Wallace

Owing to advances in microanalytical techniques over the last 15 years, there is a growing database on the volatile contents of subduction-related magmas as recorded in melt (glass) inclusions trapped in phenocrysts in volcanic rocks. Basaltic magmas from subduction zones show a wide range of water contents, ranging from as high as 6–8 to b0.5 wt.% H2O. Variations are related in some places to ...

2007
Stephen W. Parman Nobumichu Shimizu Timothy L. Grove Jesse C. Dann

The trace element compositions of igneous augite preserved in metamorphosed komatiite samples from the lower Komati Formation, Barberton Mountainland, South Africa (3.49 Ga), were analyzed in order to estimate the pre-metamorphic bulk composition of the samples. The chemical effects of metamorphism are evaluated by calculating the trace element (TE) composition of a hypothetical augite in equil...

2017
Aaron S. Bell

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2017
Alberto G Fairén Carolina Gil-Lozano Esther R Uceda Elisabeth Losa-Adams Alfonso F Davila Luis Gago-Duport

Geochemical models of secondary mineral precipitation on Mars generally assume semiopen systems (open to the atmosphere but closed at the water-sediment interface) and equilibrium conditions. However, in natural multicomponent systems, the reactive surface area of primary minerals controls the dissolution rate and affects the precipitation sequences of secondary phases, and simultaneously, the ...

Journal: :The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists 1981

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