Results 51 to 60 of about 313,354 (211)

Geochemistry of the metavolcanic rocks from the Archean Bikélélé greenstone belt (Chaillu Massif, Republic of the Congo): Petrogenesis and tectonic implications

Geosystems and Geoenvironment
The Bikélélé greenstone belt belongs to the Chaillu Massif, which corresponds to the northwestern part of the Congo Craton outcropping in the southwestern Republic of the Congo.
Yarsé Brodivier Mavoungou, Noël Watha-Ndoudy, Hardy Medry Dieu-Veill Nkodia, Anthony Temidayo Bolarinwa, Aliyu Ohiani Umaru, Georges Muhindo Kasay   +5 more
doaj   +1 more source

Integrated geophysical criteria and three-dimensional modeling for predicting gold mineralization in the Kokpatas ore field, central Kyzylkum [PDF]

E3S Web of Conferences
This study investigates the geological and geophysical characteristics of the Kokpatas gold ore field in the Central Kyzylkum, focusing on structural and lithological controls of gold mineralization.
Goipov Akram, Turgunaliyev Madumar, Boboyorov Asliddin   +2 more
doaj   +1 more source

U–Pb zircon ages of the host rocks of the Juomasuo Au–Co–Cu deposit, northeastern Finland [PDF]

Bulletin of the Geological Society of Finland, 2017
The Salittu Formation is one of the few metavolcanic successions in the U-Pb zircon single grain dating using the LA-MC-ICP-MS technique was utilized to determine the age of the host rocks of the Juomasuo Au-Co-Cu deposit located in the late Archean ...
P. Nikkola, I. Mänttäri, O.T. Rämö
doaj   +1 more source

Gold-arsenic sulfide mineralization of the Kayancha area, Gorny Altai

Руды и металлы, 2023
Gold-arsenic sulfide type mineralization has first been revealed for the Gorny Altai region. The mineralized zones associate with lamprophyre dikes and are controlled by steeply dipping faults transecting the Vendian-Cambrian terrigenous-carbonate ...
Kryazhev S. G., Dvurechenskaya S. S., Okulov A. V., Fedak S. I.   +3 more
doaj   +1 more source

Nb-depleted, continental rift-related Akaz metavolcanic rocks (West Kunlun): implication for the rifting of the Tarim Craton from Gondwana

, 2002
The Akaz metavolcanic rocks of the West Kunlun Mountains possess low to intermediate SiO2 (42.3-64.7 wt%) and MgO (2.69-7.54 wt%) and high TiO2 (0.94-3.05 wt%) and Fe2O3T (7.64-18.47 wt%), indicating a basaltic to andesitic protolith.
Yuan C, Sun M, Yang JS, Zhou H, Zhou MF
core   +2 more sources

Boninites in the ~3.3 Ga Holenarsipur Greenstone Belt, Western Dharwar Craton, India

Geosciences, 2018
In this contribution, we present detailed field, petrography, mineral chemistry, and geochemistry of newly identified high-Si high-Mg metavolcanic rocks from the southern part of the ~3.3 Ga Holenarsipur greenstone belt in the western Dharwar craton ...
Tarun C. Khanna, V. V. Sesha Sai, S. H. Jaffri, A. Keshav Krishna, M. M. Korakoppa   +4 more
doaj   +1 more source

Supracrustal rocks in the Kuovila area, Southern Finland: Structural evolution, geochemical characteristics and the age of volcanism [PDF]

Bulletin of the Geological Society of Finland, 2005
The supracrustal rocks of the Kuovila area in the Palaeoproterozoic Svecofennian Uusimaa Belt, southern Finland, consist mainly of volcaniclastic rocks associated with banded iron formations (BIFs) and marbles.
P. Skyttä, A. Käpyaho, I. Mänttäri
doaj   +1 more source

Precambrian Weathering in Acid Metavolcanic Rocks from the Superior Province, Villebon Township, South-Central Québec

, 1975
Chloritoid- and kyanite-bearing acid metavolcanic rocks of the Abitibi Greenstone belt have acquired an aluminum surplus by weathering prior to metamorphism.
D. E. Vogel
core   +1 more source

Rare Earth Element Potential in the Araí Rift Metavolcanic, Central Brazil: Gamma‐Ray Signatures, Mineralogy and Exploration Implications

Terra Nova, EarlyView.
ABSTRACT Although central Brazil hosts significant ion‐adsorption rare earth element (REE) deposits associated with A‐type granites, their coeval volcanic counterparts have been largely overlooked as exploration targets. This study demonstrates that acidic metavolcanic rocks of the Araí Group share strong radiometric, geochemical and mineralogical ...
Yuri Ribeiro, Nilson Francisquini Botelho, Valmir da Silva Souza, Diego Guilherme da Costa Gomes   +3 more
wiley   +1 more source

The 1.88 Ga Kotalahti and Vammala nickel belts, Finland: Geochemistry of the mafic and ultramafic metavolcanic rocks [PDF]

Bulletin of the Geological Society of Finland, 2009
The mafic and ultramafic volcanic rocks within the Svecofennian (1.88 Ga) Kotalahti and Vammala Nickel Belts, Finland, are spatially associated and coeval with a suite of mineralized mafic-ultramafic intrusions.
S.J. Barnes, H.V. Makkonen, S.E. Dowling, R.E.T. Hill, P. Peltonen   +4 more
doaj   +1 more source