Journal of Metamorphic Geology, EarlyView.ABSTRACT This study investigates garnet–clinopyroxene double‐layered coronae in a metagabbronorite from the high‐grade metamorphic Gföhl Unit (Bohemian Massif). The coronae formed at the interfaces between relic magmatic orthopyroxene, still preserved in the cores of the coronae, and the plagioclase‐rich rock matrix.
Rene Asenbaum +5 more
wiley +1 more source
Mafic-ultramafic intrusions of Matokulma, Palojärvi, and Hongonniittu within the Central Finland Granitoid Complex with special reference to their petrogenesis and ore potential [PDF]
Bulletin of the Geological Society of FinlandWe describe three previously unknown or poorly studied mafic-ultramafic intrusions (Matokulma, Palojärvi, Hongonniittu) from the south-central part of the Paleoproterozoic Central Finland Granitoid Complex (CFGC).
Seppo Karvinen +5 more
doaj +1 more source
GABBROIDS OF PRE-JURASSIC BASEMENT OF ARCTIC AND THEIR SULFIDE MINERALIZATION (SYUNAY-SALIN AREA, YAMAL PENINSULA) [PDF]
Минералогия, 2019 The chemical and mineral composition of gabbroids of the pre-Jurassic basement of the Syunay-Salin area located in the Arctic part of the West Siberian megabasin on Yamal Peninsula is studied.
Yu.V. Erokhin +4 more
doaj +1 more source
MINERAL CHEMISTRY OF OPHIOLITIC GABBROS WITHIN CENTRAL ANATOLIA: HIRFANLI DAM GABBROS
SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings, 2019 The tectonic evolution of the magmatic rocks the Central Anatolia (CA) began at the late Mesozoic with closure of Neotethys in the region. The Central Anatolia has experienced several magmatic events including felsic and mafic intrusions originated from collisional and/or extensional tectonic events. The felsic magmatism of the CA are well reported and
Koralay, Tamer +3 more
openaire +2 more sources
Depth of Cracking beneath Impact Craters: New Constraint for Impact Velocity [PDF]
, 2002 Both small-scale impact craters in the laboratory and less than 5 km in diameter bowl-shaped craters on the Earth are strength (of rock) controlled. In the strength regime, crater volumes are nearly proportional to impactor kinetic energy.
Ahrens, Thomas J. +2 more
core +1 more source
Geosciences, 2017 Investigation on the mobilization and the redistribution of major, trace and rare-earth elements (REE) was performed along a soil profile developed on gabbro in the semi-arid zone (Northern Cameroon), using mineralogical and geochemical analyses.
Désiré Tsozué, Paul-Désiré Ndjigui
doaj +1 more source
Estimation of physicochemical properties and tectonic environment of gabbro masses from south of Germi city (Ardabil province) based on the chemistry of clinopyroxene crystals [PDF]
پترولوژی, 2018 The studied gabbroic rocks, trending northwest- southeast, outcropped in the south of Germi, northwest of Iran. These rocks composed of plagioclase, clinopyroxene and iddingsitic olivines.
gholamreza ahmadzadeh +1 more
doaj +1 more source
Unusual, basin-scale, fluid–rock interaction in the Palaeoproterozoic Onega basin from Fennoscandia : Preservation in calcite δ18O of an ancient high geothermal gradient [PDF]
, 2016 Acknowledgements We acknowledge financial support from ICDP for the drilling programme. AEF, ATB and ARP thank NERC for financial support through NE/G00398X/1. VAM thanks the Norwegian Research Council for financial support through 191530/V30.
Brasier, A. T. +3 more
core +1 more source
The petrology and genesis of the Paleoproterozoic mafic intrusion-hosted Co-Cu-Ni deposit at Hietakero, NW Finnish Lapland [PDF]
Bulletin of the Geological Society of Finland, 2018 Cobalt is a highly sought-after metal due to its economic importance in many hightech applications. It is mainly obtained from sedimentary-hosted Cu-Co deposits and magmatic Ni-Cu deposits as a by-product. We describe a recently discovered Co-enriched Cu-
Konnunaho, J.P. +4 more
doaj +1 more source
Drilling to Gabbro in Intact Ocean Crust [PDF]
Science, 2006 Sampling an intact sequence of oceanic crust through lavas, dikes, and gabbros is necessary to advance the understanding of the formation and evolution of crust formed at mid-ocean ridges, but it has been an elusive goal of scientific ocean drilling for decades.
D. S. WILSON +51 more
openaire +3 more sources