Slab-derived devolatilization fluids oxidized by subducted metasedimentary rocks [PDF]
Nature Geoscience, 2022 AbstractMetamorphic devolatilization of subducted slabs generates aqueous fluids that ascend into the mantle wedge, driving the partial melting that produces arc magmas. These magmas have oxygen fugacities some 10–1,000 times higher than magmas generated at mid-ocean ridges.
Jay J. Ague +7 more
openaire +2 more sources
The origin of Proterozoic massif-type anorthosites: Evidence from interactions between crustal xenoliths and basaltic magma [PDF]
, 1999 Plagioclase-rich reaction zones occur around numerous aluminous crustal xenoliths within a suite of Palaeogene sub-volcanic basic sheets on the Isle of Mull, NW Scotland.
Preston, R.J. +2 more
core +8 more sources
Origins of high δ18O in 3.7–3.6 Ga crust: A zircon and garnet record in Isua clastic metasedimentary rocks [PDF]
, 2020 Elevated δ18O is used as a marker for the presence of continents and surficial alteration in the Eoarchean and Hadean. This study establishes a timeline for δ18O enrichment in Eoarchean metasedimentary rocks of the Isua supracrustal belt in Greenland ...
Gauthiez Putallaz, Laure +3 more
core +3 more sources
Geosciences, 2020 The reconstruction of the polymetamorphic history of basement rocks in orogens is crucial for deciphering past geodynamic evolution. However, the current petrographic features are usually interpreted as the results of the metamorphic recrystallization of
Simone Vezzoni +4 more
doaj +1 more source
X-RAY DIFFERACTION ANALYSIS FOR THE INTERPRETATION OF CLAY MINERALS PARAGENESIS IN THE NEOGENE SEDIMENTS OF MANG AND VICINITY, SUB-HIMALAYAS, PAKISTAN [PDF]
Earth Science Malaysia, 2017 The Neogene sediments were interpreted to understand the clay mineral paragenesis in rocks using x-ray differaction technique. The process was conducted with an x-ray diffractometer, Anode = Cu (Cu Kᾳ = 1.541871 A ), Filter = Ni, Current = 15 mA and ...
Muhammad, Muhammad
doaj +1 more source
Brazilian Journal of Geology, 2021 Differences in tectonic style and kinematics in orogenic belts can result from either multiphase or progressive deformation. In eastern Borborema Province, a regional shallow dipping foliation is multiply folded and crosscut by transcurrent shear zones ...
Valdielly Larisse Silva +1 more
doaj +1 more source
Tectonics and mineralization in Sri Lanka [PDF]
Bulletin of the Geological Society of Finland, 1985 Over nine-tenths of Sri Lanka is underlain by Precambrian metasedimentary rocks, granitic gneisses and migmatites. The Highland Series (granulite facies), made up of typical metasedimentary rocks ‒ quartzites, marble, white granulites and granulitic ...
P.W. Vitanage
doaj +1 more source
Agrociencia Uruguay, 2022 The geochemistry of two metavolcano-sedimentary sequences deposited in the Piedra Alta Terrane is compared, and their geotectonic evolution is discussed.
Gonzalo Blanco +7 more
doaj +1 more source
The Changing Character of Carbon in Fluids with Pressure
Geophysical Monograph Series, Page 259-269., 2020 This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.
Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions
Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Dimitri Sverjensky +2 more
wiley +1 more source
Parameterization and quantification of recharge in crystalline fractured bedrocks in Galicia-Costa (NW Spain) [PDF]
Hydrology and Earth System Sciences, 2012 Quantifying groundwater recharge in crystalline rocks presents great difficulties due to the high heterogeneity of the underground medium (mainly, due to heterogeneity in fracture network, which determines hydraulic parameters of the bedrock like ...
J. R. Raposo, J. Molinero, J. Dafonte
doaj +1 more source