نتایج جستجو برای: phyllite

تعداد نتایج: 124  

Journal: :International Journal of Earth Sciences 2023

Abstract New whole-rock geochemical and detrital zircon U–Pb Lu–Hf data of metasedimentary sequences the Silvretta Nappe, Orobic Alps, Strona-Ceneri Zone, Gotthard Massif Venediger Nappe are presented. These units seem to share a common early middle Paleozoic geological record, which has alternatively been interpreted as result intraplate or orogenic processes. Detrital mainly indicate late Edi...

Journal: :Hydrology Research 2023

Abstract In Ghana, crystalline rock aquifers with secondary hydraulic features and preferential flow pathways serve as very important aquifers. Protecting managing these geological porous media require identifying characteristics. this study, parameters were characterised for two boreholes (Hilly Valley) located in Tarkwa, Ghana via the integrated use of borehole dilution testing (BDT), slug te...

Journal: :Geotechnical and Geological Engineering 2021

Tunnels have been the necessary element of modern construction industry. Due to their importance for infrastructural and economic point view, several tunneling projects are being carried out. The present numerical study investigates response rock tunnel under static surface blast loading. observed in three different types rocks predominantly Himalayan mountains, i.e. Phyllitic Quartzite, Quartz...

Journal: :Tectonics 2021

The timings of the onset oceanic spreading, subduction and collision are crucial in plate reconstructions, but not always straightforward to resolve. Paleo-Tethys evolution dominated Paleozoic-Early Mesozoic tectonics West Asia, timeline events is still poorly constrained. We present new detrital zircon ages from Binalud Mountains NE Iran, order determine timing tectonic region, wider implicati...

Journal: :Earth Sciences Research Journal 2023

Every year during the Indian Summer Monsoon, large landslides occur in Lesser and Greater Himalayan rock formations, triggered by intense rainfall episodes coupled with physiography anthropogenic activities. The present study investigates slope failure mechanism's relationship material compositions. Hence, sediment samples of 25 were collected along road corridors. These from ranges formations....

Journal: :Open Journal of geology 2022

This work aims first to characterize the Maastrichtian and Paleogene clays of Ouled Bou Sbaa phosphate deposit located in northern part Meskala Basin; as a second goal, most efficient clay fractions are tested identified for organic dyes removal. Several techniques methods have been adopted characterization clays: X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), fluoresc...

Journal: :Journal of Nepal Geological Society 2023

Due to steep topography in the Himalaya, opening space for development of infrastructures involves excavation hillside slopes which possesses certain degree risk associated with failure. This paper aims assess stability rock slope excavated placement desander basin Seti Khola Hydropower Project (22 MW) located Lekhnath, Kaski district Gandaki Province. The height cut is about 60 m and challengi...

Journal: :journal of sciences, islamic republic of iran 2012
j. izadyar

late neoproterozoic-early cambrian schists have been occurred in southwest of zanjan city from the soltanieh belt. the soltanieh belt in northwest of iran is uplifted basement of precambrian-paleozoic in main central iran zone and includes outcrops of precambrian, paleozoic and mesozoic formations. late neoproterozoic-early cambrian schists, the oldest stratigraphy unit in the region, consist o...

Journal: :Geosciences 2021

We review and refine the geological setting of an area located nearby Tyrrhenian seacoast, in inner zone Northern Apennines (southern Tuscany), where a Neogene monzogranite body (estimated about 3 km long, 1.5 wide, 0.7 thick) emplaced during early Pliocene. This magmatic intrusion, known as Gavorrano pluton, is partially exposed ridge bounded by regional faults delimiting broad structural depr...

2009
E. C. BINGLER

INTRODUCTION Precambrian rocks in the Tusas Mountains range from nearly monomineralic quartzite, in which the principal result of metamorphism has been simple recrystallization, through locally metasomatized schist and gneiss profoundly modified by potash-rich fluids during the intrusion of pegmatite. Texturally, the rocks range from schist and phyllite containing penetrative and pervasive clea...

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