نتایج جستجو برای: mineralogical mapping
تعداد نتایج: 202759 فیلتر نتایج به سال:
Introduction: The pionneering Mariner and Viking optical mappings have revealed that Mars underwent an intense and active evolution, with tectonic, volcanic, water-driven and erosion processes that left record in a variety of surface structures. At the same time, they showed that Mars did not suffered a global surface reset, as it preserved areas dating from the early heavy bombardment. Major q...
Introduction: In 2006, NASA’s Stardust mission returned a capsule to Earth with particles collected from the coma of comet 81P/Wild 2. Cometary particles were collected by impact into low-density silica aerogel at a relative velocity of 6.1 km/s [1]. Upon impacting the aerogel, particles left behind tracks of melted and compressed aerogel and void space, shedding material along the way. In orde...
The conservation of monuments in Cairo represents a complex matter, influenced by the cultural context, intrinsic features vast and heterogeneous architectural heritage, environmental conditions. Monument vulnerability levels strongly need to be systematized delineate adequate programs control, management, intervention. Despite their leading role Egyptian many experience critical state conserva...
this study was an attempt to investigate and compare the effect of lexical inferencing and concept mapping on developing vocabulary retention of iranian language learners. sixty homogeneous students from different intact classes who were being taught as intermediate learners in sokhan english institute participated in this study. they were in different classes. a teacher made test as a pre-test...
Mineralogical and petrographic studies require analytical methods capable to underline the repartition of major trace elements within geological samples. The EPMA (Electron Probe Micro Analyzer) conventional method used for such investigation, but on restrictive zones, is verge be reached by μLIBS (micro Laser-Induced Breakdown Spectroscopy) μXRF X-Ray Fluorescence) techniques allowing elementa...
UNLABELLED It has been suggested that iron is one of the most important energy sources for photosynthesis-independent microbial ecosystems in the ocean crust. Iron-metabolizing chemolithoautotrophs play a key role as primary producers, but little is known about their distribution and diversity and their ecological role as submarine iron-metabolizing chemolithotrophs, particularly the iron oxidi...
Studies of dunefields in central and western North America show that mineralogical maturity can provide new insights into the origin and evolution of aeolian sand bodies. Many of the world’s great sand seas in Africa, Asia and Australia are quartzdominated and thus can be considered to be mineralogically mature. The Algodones (California) and Parker (Arizona) dunes in the southwestern United St...
Abstract The Schrödinger basin on the south polar lunar far side has been highlighted as a promising target for future exploration. This report provides high-resolution geologic map in southwest peak-ring (SWPR) area of basin, emphasizing structural features and detailed mapping exposed outcrops within peak ring. Outcrops are correlated with mineralogical data from Moon Mineralogical Mapper ins...
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