Results 11 to 20 of about 5,596 (229)
GENETIC AND EXPLORATION IMPLICATIONS OF THE ZINC RATIO [100 Zn/(Zn + Pb)] IN THE RODRUIN PROSPECTING AREA OF THE GOLDEN TRIANGLE -EGYPT [PDF]
Delta Journal of Science, 2022 Rodruin Prospecting Area (26o21/59//N, 33o20/32//) in the Golden Triangle -Egypt, was exploited by the Ancient Egyptian Miners. They exploited gold from gossans and gossanous gold-bearing quartz veins.
Hassan Harraz +3 more
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Thermal conductivity anisotropy of metasedimentary and igneous rocks [PDF]
Journal of Geophysical Research: Solid Earth, 2007 Thermal conductivity anisotropy was determined for three sets of metasedimentary and igneous rocks from central Utah, USA. Most conductivity measurements were made in transient mode with a half‐space, line source instrument oriented in two orthogonal directions on a flat face cut perpendicular to bedding.
Michael G. Davis +3 more
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Геодинамика и тектонофизика, 2022 The paper presents the first results of U-Th-Pb (LA-ICP-MS) isotopic dating of detrital zircons from the Paleozoic (?) metasedimentary rocks of the Nilan Terrane of the Mongol-Okhotsk orogenic belt to refine the age estimates and determine their probable
V. A. Zaika +3 more
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The Recovery of Fine Cassiterite from Metasedimentary Rock [PDF]
Journal of Geological Resource and Engineering, 2016 It is known that ore containing cassiterite (SnO2) has been our most important source of tin since antiquity and its successful separation continuously pose problems to mineral processors. The situation is more pronounced since the depletion of the more easily recoverable alluvial reserves forces us to work with the more complex deposits such as ...
null Ismail Ibrahim +2 more
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Origins of high δ18O in 3.7–3.6 Ga crust: A zircon and garnet record in Isua clastic metasedimentary rocks [PDF]
, 2020 Elevated δ18O is used as a marker for the presence of continents and surficial alteration in the Eoarchean and Hadean. This study establishes a timeline for δ18O enrichment in Eoarchean metasedimentary rocks of the Isua supracrustal belt in Greenland ...
Gauthiez Putallaz, Laure +3 more
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Geosciences, 2020 The reconstruction of the polymetamorphic history of basement rocks in orogens is crucial for deciphering past geodynamic evolution. However, the current petrographic features are usually interpreted as the results of the metamorphic recrystallization of
Simone Vezzoni +4 more
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Brazilian Journal of Geology, 2021 Differences in tectonic style and kinematics in orogenic belts can result from either multiphase or progressive deformation. In eastern Borborema Province, a regional shallow dipping foliation is multiply folded and crosscut by transcurrent shear zones ...
Valdielly Larisse Silva +1 more
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X-RAY DIFFERACTION ANALYSIS FOR THE INTERPRETATION OF CLAY MINERALS PARAGENESIS IN THE NEOGENE SEDIMENTS OF MANG AND VICINITY, SUB-HIMALAYAS, PAKISTAN [PDF]
Earth Science Malaysia, 2017 The Neogene sediments were interpreted to understand the clay mineral paragenesis in rocks using x-ray differaction technique. The process was conducted with an x-ray diffractometer, Anode = Cu (Cu Kᾳ = 1.541871 A ), Filter = Ni, Current = 15 mA and ...
Muhammad, Muhammad
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Tectonics and mineralization in Sri Lanka [PDF]
Bulletin of the Geological Society of Finland, 1985 Over nine-tenths of Sri Lanka is underlain by Precambrian metasedimentary rocks, granitic gneisses and migmatites. The Highland Series (granulite facies), made up of typical metasedimentary rocks ‒ quartzites, marble, white granulites and granulitic ...
P.W. Vitanage
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Agrociencia Uruguay, 2022 The geochemistry of two metavolcano-sedimentary sequences deposited in the Piedra Alta Terrane is compared, and their geotectonic evolution is discussed.
Gonzalo Blanco +7 more
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