Results 21 to 30 of about 2,816 (163)
China Geology, 2022 The A-type granites with highly positive εNd(t) values in the West Junggar, Central Asian Orogenic Belt (CAOB), have long been perceived as a group formed under the same tectonic and geodynamic setting, magmatic sourceq and petrogenetic model. Geological
Chu Wu +4 more
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GRANITES OF THE NORTHERN TIMAN – PROBABLE INDICATORS OF NEOPROTEROZOIC STAGES OF RODINIA BREAKUP
Геодинамика и тектонофизика, 2020 The Northern Timan is an uplifted block of Late Precambrian basement of the Timan Ridge, where Neoproterozoic sedimentary-metamorphic rocks of the Barmin Group are cut by intrusive rocks of different composition and all unconformably overlain by Lower ...
V. L. Andreichev +5 more
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Journal of Asian Earth Sciences: X, 2021 The Precambrian basement of the Gyeonggi Massif in the central Korean Peninsula consists mainly of Paleoproterozoic (2.0–1.8 Ga) gneisses. In this study, we present petrological, zircon U–Pb age and Hf isotope, and whole-rock geochemical and Sr–Nd–Pb ...
Ji-In Kim, Sung Hi Choi
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Geochemical characterization of Gubanovskaya intrusion of rapakivi granites (Wiborg massif)
Vestnik MGTUThe paper presents new data on geology and composition of rapakivi granites of Gubanovskaya intrusion (Wiborg massif). Petrographic and geochemical characteristics of rapakivi granites of the second (ovoid) and third (trachytoid) phases of intrusion, as ...
Rogova I. V. +3 more
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PETROLOGY AND URANIUM DISTRIBUTION IN THE YOUNGER GRANITES OF GABAL ABU DIAB AREA, EASTERN DESERT, EGYPT [PDF]
Delta Journal of Science, 2005 The area of Gabal Abu Diab (about 92.5km2) is located between latitudes 25º 11` and 25º 16`N and longitudes 34º 11` and 34º 17` E. The younger granites of G.
MEDHAT M. EL-MANSI
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Brazilian Journal of Geology, 2020 The Vieirópolis pegmatite field is characterized by amazonite pegmatites inserted in the Borborema Province. The Serra Branca pegmatite is hosted by the Serra Branca granites, which intruded partially the Serra Negra granites, and stands out by its ...
Igor Manoel Belo de Albuquerque e Souza +4 more
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CoRRWe introduce the Granite Guardian models, a suite of safeguards designed to provide risk detection for prompts and responses, enabling safe and responsible use in combination with any large language model (LLM). These models offer comprehensive coverage across multiple risk dimensions, including social bias, profanity, violence, sexual content ...
Inkit Padhi +22 more
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Granites and granites in the East Greenland Caledonides
, 2008 Caledonian (435-425 Ma) and "Grenvillian" (950-900 Ma) S-type leucogranites and augen gneisses are prominent in the thrust units that form the southern half of the East Greenland Caledonian orogen, south of 76°N.
Kalsbeek, Feiko +4 more
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CONTRIBUTION TO THE GEOLOGY AND RADIOACTIVITY OF THE OLDER GRANITOIDS AND YOUNGER GRANITED OF GABAL EL-URF-GABAL ABU SHIHAT AREA, EASTERN DESERT, EGYPT [PDF]
Delta Journal of Science, 2005 The younger granites form an elongated belt following NNE-SSW direction. They intrude the older granitoids with sharp intrusive contacts and carry them as roof pendants. Two varieties of the younger granites are identified.
AHMED M. DARDIER, MEDHAT M. EL-MANSI
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Литосфера, 2018 Murzinka massif is a sheet-like interformational body steeply deeping to the East with length about 6 km. Proterozoic metamorphic rocks of the predominantly granulite facies ( P = 5-6 kbar, T = 750-800°C) occur at the base of massif, and volcanic ...
German B. Fershtater +1 more
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