نتایج جستجو برای: migmatite

تعداد نتایج: 114  

Journal: :Journal of South American Earth Sciences 2021

The Conlara Metamorphic Complex, the easternmost complex of Sierra de San Luis, is a key unit to understand relationship between late Proterozoic-Early Cambrian Pampean and Upper Cambrian-Middle Ordovician Famatinian orogenies Eastern Sierras Pampeanas. Complex extends east foothills Comechingones west up Río Guzmán shear zone. main rock types CMC are metaclastic metaigneous rocks that intruded...

Journal: :International journal of environment and geoinformatics 2021

This study aimed at the geological and geospatial mapping of flood vulnerable areas in Ganaja, Lokoja metropolis for proper mitigation. The area involved taking several traverses understudying different rock types area. Rocks identified are porphyritic granite, migmatite, augen gneiss, aplitic medium-grained pegmatitic intrusions quartzo-feldspathic veins, banded gneiss biotite gneiss. Fracture...

Journal: :Advances in Geological and Geotechnical Engineering Research 2023

The Rb-Sr whole-rock isochron, age 1636 ± 66 Ma of Mirgarani granite, is the one oldest granite dated in northwestern part Chhotanagpur Granite Gneiss Complex (CGGC). initial Sr ratio 0.715 0.012 (MSWD = 0.11), showing an S-type affinity. has intruded migmatite complex Dudhi Group and forms formation comparable to granites Bihar Mica Belt around Hazaribagh (1590 30 Ma). present studies have est...

Journal: :Journal of Petroleum Exploration and Production Technology 2021

Abstract Outcrop mapping as well electromagnetic and ground magnetic surveys was carried out within Auchi Igarra localities in order to attempt an interpretation of the geology areas delineate boundary between basement sedimentary terrains. Geologic done by collecting samples outcrops at five different locations areas. Three lithofacies were identified area they are basal shale unit, tabular cr...

Journal: :The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists 1960

Journal: :The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists 1960

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