Geology, geochronology and geochemistry of the 2.05 Ga gneissic A1-type granites and related intermediate rocks in central Finland: implication for the tectonic evolution of the Karelia craton margin [PDF]
Bulletin of the Geological Society of Finland, 2019 The 2.05 Ga Otanmäki suite represents a globally rare occurrence of Paleoproterozoic non-orogenic A1-type magmatism. It consists of a broad variety of A-type felsic and intermediate igneous rocks including monzodiorites, monzonites, syenites and peral ...
Kimmo Kärenlampi +3 more
doaj +1 more source
Structural features and emplacement of the late Svecofennian Perniö granite sheet in southern Finland [PDF]
Bulletin of the Geological Society of Finland, 1996 The 1840-1830 Ma old Perniö granite occupies the southern margin of the Sauvo-Perniö granite area located in the western part of the late Svecofennian granite-migmatite zone in southern Finland.
O. Selonen, C. Ehlers, A. Lindroos
doaj +1 more source
The Anicuns-Itaberaí volcano-sedimentary sequence, Goiás Magmatic Arc: new geochemical and Nd-S isotopic data [PDF]
Geochimica Brasiliensis, 2017 The Neoproterozoic Anicuns-Itaberaí volcano-sedimentary sequence exposed in the surroundings of Anicuns, western Goiás, comprises a complex association of igneous and supracrustal rocks, which has been divided into: (i) the Córrego da Boa Esperança ...
Jorge Henrique Laux +3 more
doaj
Geological setting and intrusion tectonics of the Kotalahti nickel-copper deposit, Finland [PDF]
Bulletin of the Geological Society of Finland, 1980 The wall rocks of the nickel bearing mafic and ultramafic plutonic rocks of Kotalahti are Archean banded granitoidic gneisses containing inliers of Archean metasediments and metavolcanics.
G. Gaál
doaj +1 more source
Zinc Contents of Mafic Micerals in Granitic Rocks, with Special Reference to Ore Chemistry [PDF]
, 2003 In order to know the reason why the Cu/Zn-Pb ratios of skarn-type deposits related with the ilmenite-series granitic rocks are markedly higher than those related with the magnetite-series, comparative mineralogical studies were carried out for the two ...
Inoue, Yoshinori +2 more
core +1 more source
Geofluids, 2022 The Xiong’er Group is mainly distributed in western Henan, southern Shanxi, and southeastern Shaanxi. As a set of low-grade metamorphic and low-deformation volcanic rocks formed in the transition period during the tectonic evolution of the North China ...
Wenchao Dong +3 more
doaj +1 more source
Journal of the Geological Survey of Brazil, 2022 The Juruena Terrain (Rondônia-Juruena Province) in the southeastern Amazonas State shows a NW-SE dextral shear zones system denominated Roosevelt-Guariba Transpressive Belt (RGTB). The RGTB was generated in response to intracontinental crustal reworking,
Marcelo Esteves Almeida +4 more
doaj +1 more source
Sm-Nd ages of two meta-anorthosite complexes around Holenarsipur: Constraints on the antiquity of Archean Supracrustal rocks of the Dharwar craton [PDF]
, 2000 Whole-rock Sm-Nd isochron ages are reported for two stratiform meta-anorthosite complexes emplaced into the Archean supracrustal-gneiss association in the amphibolite facies terrain around Holenarsipur, in the Dharwar craton, South India.
Iyer, Anantha GV +4 more
core +2 more sources
Archean granitoid gneisses and supracrustal enclaves of the southern Inukjuak domain, Quebec (Canada) [PDF]
, 2016 The Inukjuak domain in northern Québec is part of the Archean Minto Block in the northwestern Superior Province of Canada, and hosts numerous km-scale supracrustal enclaves within variably-deformed granitoid gneisses. The Eoarchean (ca.
Greer, Jennika
core +6 more sources
Tectonic setting and evolution of the Morin anorthosite, Grenville province, Quebec [PDF]
Bulletin of the Geological Society of Finland, 1970 The Morin Anorthosite Mass underlies an area of 2 500 square kilometers; it consists of three tectonic units: a dome, a diapir and a nappe. The units have in common a large part of their magmatic history, but their tectonic evolution is different.
J. Martignole, K. Schrijver
doaj +1 more source