Results 21 to 30 of about 387 (119)
Известия Томского политехнического университета: Инжиниринг георесурсов, 2019 The relevance of the discussed issue is caused by the need of researching petro-geochemistry and petrologic peculiarities of gabbrogranitoid massifs of Makarevskii range which are related spatially to gold occurrence.
Anatoliу Ivanovich Gusev +1 more
doaj +2 more sources
Anais da Academia Brasileira de Ciências, 2002 Recent geological, geochronological and isotopic research has identified four important Archean crustal segments in the basement of the São Francisco Craton in the State of Bahia.
JOHILDO S.F. BARBOSA, PIERRE SABATÉ
doaj +1 more source
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 10, October 2026.Abstract The Scourie dyke swarm in the Lewisian foreland of northwest Scotland provides key constraints on the Paleoproterozoic evolution of the North Atlantic craton. High‐precision U‐Pb geochronology identifies two distinct intrusive phases at ∼2.41–2.38 Ga and ∼2.00 Ga.
M. Mirzaei +4 more
wiley +1 more source
, 1987 Pronounced fluorapatite mineralization is present in sheeted trondhjemites near Timmins. The trondhjemites intrude a deformed ultramafic to Fe-tholeiite volcanic sequence disposed in the structural hanging wall of the Destor–Porcupine Fault, and they ...
R. Kerrich, R. W. King
core +1 more source
Geology, age and tectonic evolution of the Sierra Maestra Mountains, southeastern Cuba
Geologica Acta, 2006 We summarize the available geological information on the Sierra Maestra Mountains in southeastern Cuba and report new zircon fission track and biotite Ar-Ar ages for this region. Two different and genetically unrelated volcanic arc sequences occur in the
Franz Neubauer +4 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.Abstract The soles of ophiolites preserve slices of oceanic crust metamorphosed to amphibolite‐ to granulite‐facies conditions beneath heavily deformed mantle peridotites, providing key records of fluid and mass transfer across nascent subduction interfaces.
Louise Mérit +11 more
wiley +1 more source
Genesis of Trondhjemite by Low-pressure Fraction Anatexis of Hornblende-gabbro at Alvand Plutonic Complex (Hamedan, NW Iran): Insights from Geochemical Modelling. [PDF]
, 2021 Amphibole-dominated dehydration melting of gabbro is the primary process responsible for the genesis of adakites, low-K tonalites, modern trondhjemites, and plagiogranites aswell as Archean tonalite-trondhjemite-granodiorite suites that represent the ...
Rabiee, Ahmad +4 more
core +1 more source
Role of Post‐Collisional Magmatism in Continental Growth and Reworking Since the Late Archean
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.Abstract The mechanisms responsible for the formation and compositional evolution of continental crust remain central questions in Earth science. Post‐collisional magmatism is widely preserved in the continental record; however, its contribution to crustal growth may be underestimated because enriched isotopic signatures obscure juvenile mantle input ...
Dongjian Ouyang +4 more
wiley +1 more source
The imprint of subduction fluids on subducted MORB-derived melts (Sierra del Convento Melange, Cuba)
, 2011 International audienceMajor and trace element signatures and Sr-Nd-Pb isotope data for muscovite (Ms)-bearing amphibolite blocks and associated muscovite-bearing trondhjemite and quartz-muscovite rocks from the Sierra del Convento melange (eastern Cuba ...
Bosch, Delphine +11 more
core +1 more source
Tectonics, Volume 45, Issue 8, August 2026.Abstract The assembly of Gondwana involved several Pan‐African orogens, although their extension into ice‐covered Antarctica remains contentious. Particularly problematic is our understanding of the Kuunga orogenic system in East Antarctica, including its eroded architecture and temporal evolution. The remote Charcot Province, at the easternmost extent
Jacqueline A. Halpin +4 more
wiley +1 more source