نتایج جستجو برای: pyroxene andesite
تعداد نتایج: 1838 فیلتر نتایج به سال:
Introduction: For any near-Earth asteroid (NEA) on a possible collision course with Earth, a number of factors must be determined to evaluate the object’s potential hazard. One of these factors is the object’s mineralogy, which can be used to estimate the density and, therefore, the mass of the object. This work discusses how to determine the mineralogies of NEAs that have reflectance spectra s...
Data from the Observatoire pour la Minéralogie, l'Eau, les Glaces, et l'Activité (OMEGA) on the Mars Express spacecraft identify the distinct mafic, rock-forming minerals olivine, low-calcium pyroxene (LCP), and high-calcium pyroxene (HCP) on the surface of Mars. Olivine- and HCP-rich regions are found in deposits that span the age range of geologic units. However, LCP-rich regions are found on...
Landforms and geomorphological processes is the most important factors that affecting dispersion and quality of building materials. Case study, consisting of both new and old alluvial fans is located in the West of the city of Sabzevar. The aim of this study was to investigate the process of freezing and thawing in the durability and quality of materials taken from the alluvial fans old and ne...
Roshtkhar Iron deposit is located in southeast of Khorasan Razavi Province about 48 Km east of Roshtkhar. This deposit is geologically located in the northeast of the Lut block in the Khaf-Bardaskan volcanic- plutonic belt. Intermediate igneous rocks such as stock, dyke, lava and pyroclastic deposits are host rock. Igneous rocks are dioritic porphyry, monzosyenitic porphyry, andesite, basalt an...
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