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The TTG-Amphibolite Terrains of Arctic Fennoscandia: Infinite Networks of Amphibolite Metatexite-Diatexite Transitions [PDF]

open access: yesFrontiers in Earth Science, 2020
The Earth’s early basaltic crust converted episodically into felsic TTG (tonalite-trondhjemite-granodiorite) crust by unknown tectonic processes. To contribute to the debate on the possible tectonic settings of TTGs, this article illustrates and explains
Jaana Halla
doaj   +5 more sources

Petrology and geochemical characteristics of amphibolite facies rocks in Xunyangba area, South Qinling Orogen, Central China

open access: yesFrontiers in Earth Science, 2023
As a tectonic block of the Qinling Orogenic Belt, Central China, the South Qinling Orogen is generally believed to have had a tight affinity with the Yangtze Block during the Precambrian.
Juanjuan Kong   +9 more
doaj   +1 more source

A Mélange of Subduction Ages: Constraints on the Timescale of Shear Zone Development and Underplating at the Subduction Interface, Catalina Schist (CA, USA)

open access: yesGeochemistry, Geophysics, Geosystems, 2021
The presence of mélange at the subduction interface influences numerous geochemical and geophysical processes. However, the relationship between the timescales of mélange development, deformation, and resultant mass transport is poorly understood.
K. M. Harvey   +5 more
doaj   +1 more source

Convective Instability in Intraplate Oceanic Mantle Caused by Amphibolite-Derived Garnet-Pyroxenites—A Xenolith Perspective (Hyblean Plateau, Sicily)

open access: yesGeosciences, 2020
Geochemical characteristics of middle ocean ridge basalts (MORBs) testify partial melting of spinel-peridotite mixed with a few amounts of garnet-pyroxenite.
Vittorio Scribano, Serafina Carbone
doaj   +1 more source

Metamorphic Evolution of the Garnet Amphibolite Schist from Mawat Ophiolite, Kurdistan Region, Northeast Iraq: Geochemistry, Mineral Chemistry and Thermodynamic Approach

open access: yesIraqi Geological Journal, 2023
The garnet amphibolite schist is associated with the gabbroic unit of the Mawat ophiolite, Kurdistan region, Northeast Iraq, in the imbricated zone of the Zagros orogenic belt.
Danar Omer   +2 more
doaj   +1 more source

The electrical signature of rock samples exposed to hydrostatic and triaxial pressures

open access: yesAnnals of Geophysics, 2001
The electrical signature of sedimentary (carbonate) and crystalline rock samples was studied in hydrostatic and triaxial pressure experiments up to 300 MPa.
G. Nover, H. Heikamp
doaj   +1 more source

Mineralogy and thermobarometry of metamorphic basement from the Kabul Block (Eastern Afghanistan) [PDF]

open access: yesپترولوژی, 2019
The cratonic basement in the Kabul district is dominated by gneiss, migmatite, schist, and amphibolite and is characterized by extensive outcrops.  Orthopyroxene and garnet are the index minerals of some of the gneisse, hence, they are considered as ...
Ali Mohammad Ramezani   +3 more
doaj   +1 more source

mineralogy, the nature of magmatic and tectonic setting of amphibolite protolith from Gol Gohar iron ore deposit, Sirjan, Kerman [PDF]

open access: yesپترولوژی, 2018
The Golgohar iron mine is located at 55 km southwest of Sirjan in the Sanandaj-Sirjan structural zone. The host rocks of the ore deposit include metamorphosed rocks in green schist and amphibolite facies.
Afsane Jafari   +4 more
doaj   +1 more source

Geology of the Montigiu Nieddu metamorphic basement, NE Sardinia (Italy)

open access: yesJournal of Maps, 2020
A geological map at 1:10,000 scale is presented that shows the distribution of the metamorphic rock units in the area of Montigiu (Mt.) Nieddu (NE Sardinia). These units belong to the High-Grade Metamorphic Complex in the Inner Zone of the Variscan chain
Gabriele Cruciani   +3 more
doaj   +1 more source

TWO EPISODES OF METAMORPHISM IN THE ROCKS OF THE EASTERN KITOI BLOCK (SHARYZHALGAI UPLIFT OF THE SIBERIAN PLATFORM) ACCORDING TO THE GARNET AMPHIBOLITE DATA

open access: yesГеодинамика и тектонофизика, 2020
The Archean metamorphism in the southwestern Siberian craton was confirmed by the studies of the Kitoy and Irkutsk blocks. However, the parameters of the metamorphism process are still poorly investigated.
V. P. Sukhorukov, V. B. Savel'eva
doaj   +1 more source

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