Results 1 to 10 of about 25,421 (273)

Disequilibrium metamorphism of stressed lithosphere

open access: yesEarth-Science Reviews, 2016
© 2015 Elsevier B.V. Most changes in mineralogy, density, and rheology of the Earth's lithosphere take place by metamorphism, whereby rocks evolve through interactions between minerals and fluids.
Bjørn Jamtveit   +2 more
exaly   +2 more sources

Metamorphism and Metamorphic Belts

open access: yes, 1973
The metamorphic facies series in regional metamorphism may be classified into the following categories according to an order of increasing rock pressure:((1) andalusite-sillimanite type, (2) low-pressure intermediate group, (3) kyanite-sillimanite type, (
Miyashiro, Akiho, Akiho Miyashiro
openaire   +2 more sources

PETROGRAPHY AND GEOCHEMISTRY OF METASEDIMENTS FROM BUGAJI, PART OF MALUMFASHI SHEET 79 NE, KANO STATE, NORTHWESTERN NIGERIA [PDF]

open access: yesGeological Behavior, 2023
This research is aimed at determining the protolith of metasediments that underpin the geology of Bugaji region of Kano State. The study area was mapped systematically and the lithologies encountered include phyllite, undifferentiated schist, quartzo ...
Abdullah Musa Ali   +1 more
doaj   +1 more source

The sedimentary record of ultrahigh-pressure metamorphism: a perspective review [PDF]

open access: yes, 2022
Tracing ultrahigh-pressure (UHP) metamorphism of crustal rocks through the geological record is a key for understanding the evolution of plate tectonics on Earth due to the linkage with deep subduction processes.

core   +1 more source

Fluid-induced metamorphism and anatexis of refractory Ni-Co-Cu sulphides in subduction-related rocks [PDF]

open access: yesE3S Web of Conferences, 2019
The role of metamorphism on refractory sulfides is not well constrained. Although experiments have displayed the effectiveness of high grade metamorphism, namely granulite facies metamorphism, on sulfide anatexis, its role in the presence of other ...
Kepezhinskas Nikita
doaj   +1 more source

Iron quartzites of the Simandou mountain (Republic of Guinea)

open access: yesРуды и металлы, 2022
In this article, we for the first time fully describe the geology and petrography of the iron quartzite formation, localized in Southeast Guinea in the Simandou mountain range. In this region, a meridional distribution belt of banded magnetite quartzites
Alexander V. Bolonin   +2 more
doaj   +1 more source

ZIRCONS FROM ROCKS OF THE MURZINKA-ADUI METAMORPHIC COMPLEX: GEOCHEMISTRY, THERMOMETRY, POLYCHRONISM, AND GENETIC CONSEQUENCES

open access: yesГеодинамика и тектонофизика, 2021
Transformation of the oceanic crust into the continental one in orogenic belts is an important problem in petrological studies. In the paleocontinental sector of the Urals, a key object for tracing the stages of metamorphism and investigating the origin ...
G. Yu. Shardakova   +4 more
doaj   +1 more source

GEOCHEMICAL MARKERS OF THE JOINT STRUCTURAL AND COMPOSITIONAL EVOLUTION OF THE BASEMENT AND COVER (NORTHERN LADOGA SWECOFENNIDES, RUSSIA)

open access: yesГеодинамика и тектонофизика, 2022
Detailed studies of the deeply metamorphosed Early Precambrian rocks of the Northern Ladoga region allowed us to distinguish three deformation stages of the Svecofennian tectogenesis during which there occurred significant structural and compositional ...
Yu. A. Morozov   +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

Metamorphic testing of OpenStreetMap [PDF]

open access: yesInformation and Software Technology, 2021
OpenStreetMap represents a collaborative effort of many different and unrelated users to create a free map of the world. Although contributors follow some general guidelines, unsupervised additions are prone to include erroneous information. Unfortunately, it is impossible to automatically detect most of these issues because there does not exist an ...
Jesús Manuel Almendros-Jiménez   +3 more
openaire   +4 more sources

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