Results 41 to 50 of about 1,706 (214)

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

Geology, geochemistry and Sr–Nd constraints of selected metavolcanic rocks from the eastern boundary of the Saharan Metacraton, southern Sudan : a possible revision of the eastern boundary [PDF]

, 2016
Neoproterozoic, Pan-African low-grade metavolcanic rocks and associated mafic and ultramafic rocks of ophiolitic origin have long been identified within the pre-Neoproterozoic Saharan Metacraton (SMC). These low-grade rocks within generally high-grade (
Abdelrahman, E.M., Bumby, Adam John, Eriksson, Patrick George, Ibinoof, M.A., Le Roux, P.J., Grantham, G.H.   +5 more
core   +1 more source

Origin and tectonic significance of the metavolcanic rocks and mafic enclaves from the Palaeoproterozoic Birimian Terrane, SE West African Craton, Ghana

, 2020
The Palaeoproterozoic Birimian Supergroup of the West African Craton (WAC) consists of volcanic belts composed predominantly of basaltic and andesitic rocks and intervening sedimentary basins composed predominantly of wackes and argillites.
Malaviarachchi, Sanjeewa P. K., Anani, Chris Y., Manu, Johnson, Kwayisi, Daniel, Nude, Prosper M., Su, Ben-Xun, Alemayehu, Melesse, Sakyi, Patrick Asamoah, Su, Ben-Can   +8 more
core   +1 more source

Tonian Continental Arc Magmatism of the Porongos Complex, Dom Feliciano Belt, Southern Brazil

Geologia USP. Série Científica, 2023
This study provides new information on the deformation, metamorphism, and tectonic setting of the metavolcanic rocks of the southern portion of the Porongos Complex, southern Brazil.
Rodrigo Antonio de Freitas Rodrigues, Juliana Pertille, Fernanda Gervasoni, Paola Bruno Arab, Thales Sebben Petry, Marina Luiza Jordão Martins, Áquila Ferreira Mesquita, Jorge Henrique Laux, Breno Souza Martins, Lívia Brochi Nascimento   +9 more
doaj  

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

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

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

Major element geochemistry of pyroxenes in metavolcanic rocks of IODP Exp366 samples

, 2019
Major element geochemistry of pyroxenes in metavolcanic rocks of IODP Exp366 ...
Bach, Wolfgang, C D Menzies (7885667), Damon A H Teagle (7885670), Klein, Frieder, Lucassen, Friedrich, Teagle, Damon A H, Elmar Albers (7883690), Wolfgang Bach (6960488), Frieder Klein (6966005), Friedrich Lucassen (3704155), Albers, Elmar, Menzies, C D   +11 more
core   +1 more source

Ductile Extrusion Triggered by Continental Collision in NE Brazil

Terra Nova, EarlyView.
ABSTRACT The Borborema Province in northeastern Brazil hosts one of the world's largest strike‐slip shear zone networks, active during the late Neoproterozoic assembly of West Gondwana. Whether these shear zones initiated during active continental collision or as a post‐orogenic response to far‐field stresses remains debated.
L. R. Tesser, C. E. Ganade, C. R. Cioffi, J. B. Forshaw, M. Hueck, E. Celis, M. A. S. Basei   +6 more
wiley   +1 more source

Geochemical and Isotopic Constraints on Long‐Lived Source Enrichment and Mantle Evolution in Paleoproterozoic Cratonic Lamprophyres

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The cratonic lithospheric mantle records complex metasomatic processes and is frequently tapped by alkaline magmatism, offering a unique opportunity to trace the progressive evolution of the mantle. In the present contribution, we investigate a newly identified calc‐alkaline lamprophyre field from the Neoarchean Jonnagiri Schist Belt, Eastern ...
Sourav Naskar, Rohit Pandey, Nils Björn Baumann, N. V. Chalapathi Rao, George Mathew, J. Amal Dev, J. K. Tomson   +6 more
wiley   +1 more source