نتایج جستجو برای: paragenesis
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In the western part of Sierra de los Filabres area, there are fine-grained metamorphic rock bands, showing a field aspect simitar to slates, as previously described in geological literature studied region. They variable thickness, from millimeters tens meters and appear intercalated schist succession. The geochemical resemblance between both types rocks (major, minor trace elements), determined...
The Jajarm bauxite deposit is a part of the Irano-Hymalayan karst bauxite belt which is located about 175 km southwest of Bojnourd. This deposit has been developed as a stratiform horizon along the contact of Triassic dolomites and the Jurassic shales and sandstones. The basal contact zone of the bauxite horizon is mainly undulatory, and bauxite fills cavities in the footwall dolomite, whereas ...
The studied area is situated in southwestern Birjand (South Khorasan). Lithologic units which are studied contains part of the late Cretaceous coloured melange, Cretaceous and Paleogen flysh sediments, Neogen congolmerate and Tertiary volcanic rocks. The listwaenite of this area often appears along fault zone, boundary of units, bedding planes and schistiosity as yellow and brownish vein. ...
Halakabad is located about 30 km south of Sabzevar. Basalt, andesite, hornblende andesite and hornblende dacite are the oldest volcanic rocks cropping out in the study area. Monzodiorite, quartz diorite, quartz monzodiorite, quartz monzonite, and hornblende quartz monzodiorite intruded the volcanic rocks. Application of component analysis is one of the methods that can help to reveal simpler pa...
Bovaki and Aghbolagh tungsten (copper-tin-zinc) ore occurrences are located 12 and 14 km northwest of Azna respectively. The region is located in Sanandaj-Sirjan structural zone of Iran, at the complex deformation sub-zone. There are alternative comsisty Upper Triassic carbonate, quartzite and meta-volcanic rocks (such as meta-tuff). In this area, tungsten-copper mineralization occurs as strati...
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...
The paragenesis of carbonates in the Cold Bokkeveld CM chondrite is determined from a detailed petrographic, chemical, spectroscopic, and isotopic study nine associations (aragonite, calcite, dolomite) with other secondary minerals that occur within meteorite. Our reveals existence displaying petrographic features are distinct those type 1 2 commonly observed CM2 meteorites. These include inter...
ABSTRACT This paper presents an integrated petrographic–geochemical–geomechanical study of the growth mechanisms carbonate and chert concretions observed at outcrop core from Upper Cretaceous to Eocene organic‐rich mudrocks, central Jordan. It provides evidence for displacive replacive concretion analysis primary lithological characteristics, compaction strain deformation structures associated ...
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