Results 51 to 60 of about 12,638 (229)

Tracking Dehydration Reactions and Fossil Fluid Flux in Shear Zones Using Garnet Microstructures

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Shear zones act as preferential fluid pathways during prograde and retrograde stages of metamorphism. Nonetheless, we still have limited knowledge of the drainage and permeability of natural settings. The preserved signature of fluid in exhumed rocks provides insights into fluid flow during burial and exhumation.
Alessandro Petroccia, Francesco Giuntoli, Alissa Kotowski, Gianmarco Buono, Alireza Chogani, Eric Hellebrand, Lucia Pappalardo, Ivan Callegari   +7 more
wiley   +1 more source

Archeometric Investigation of the Stone Tools of the Vatya Culture (Pest County, Hungary) [PDF]

, 2014
With the analysis of the middle Bronze Age (2000–1350 BC) Vatya culture findings in Pest county (Central Hungary) comprising of more than 400 polished stone tools and instrument tools this is the first archaeometric study with such scale in Hungary.
Farkas-Pető, Anna, Horváth, Tünde, Kovács-Pálffy, Péter, Papp, István   +3 more
core  

Mineral chemistry of the ophiolitic peridotites and gabbros from the Serow area: Implications for tectonic setting and locating the Neotethys suture in NW Iran [PDF]

, 2014
The Serow ophiolite in NW Iran, located at the Iran-Turkey border, is composed of mantle sequence peridotites, predominantly lherzolitic-harzburgite with subordinate amounts of lherzolite and dunite, and a crustal sequence made from gabbros, diabases ...
Moazzen, Mohssen, Rezaii, Leyla
core   +1 more source

Evolution Model for the Paleoproterozoic Talvivaara Mudstone‐Hosted Ni‐Zn‐Cu‐Co Deposit in Fennoscandia

Terra Nova, EarlyView.
ABSTRACT The Paleoproterozoic Talvivaara mudstone is a very large sulfidic Ni‐Co deposit that records enhanced organic matter accumulation during the global Shunga Event. Here, rock geochemistry and microscale S and Fe isotope composition of in situ pyrrhotites and pyrites are studied in well‐characterised, well‐preserved drill core samples.
Raimo Lahtinen, Jaakko J. Laitala, Joonas J. Virtasalo, Martin J. Whitehouse   +3 more
wiley   +1 more source

Ductile Extrusion Triggered by Continental Collision in NE Brazil

Terra Nova, EarlyView.
ABSTRACT The Borborema Province in northeastern Brazil hosts one of the world's largest strike‐slip shear zone networks, active during the late Neoproterozoic assembly of West Gondwana. Whether these shear zones initiated during active continental collision or as a post‐orogenic response to far‐field stresses remains debated.
L. R. Tesser, C. E. Ganade, C. R. Cioffi, J. B. Forshaw, M. Hueck, E. Celis, M. A. S. Basei   +6 more
wiley   +1 more source

Hydrated Peridotite – Basaltic Melt Interaction Part I: Planetary Felsic Crust Formation at Shallow Depth

Frontiers in Earth Science, 2021
Current theories suggest that the first continental crust on Earth, and possibly on other terrestrial planets, may have been produced early in their history by direct melting of hydrated peridotite.
Anastassia Y. Borisova, Anastassia Y. Borisova, Nail R. Zagrtdenov, Michael J. Toplis, Wendy A. Bohrson, Anne Nédélec, Oleg G. Safonov, Oleg G. Safonov, Oleg G. Safonov, Gleb S. Pokrovski, Georges Ceuleneer, Ilya N. Bindeman, Ilya N. Bindeman, Oleg E. Melnik, Klaus Peter Jochum, Brigitte Stoll, Ulrike Weis, Andrew Y. Bychkov, Andrey A. Gurenko, Svyatoslav Shcheka, Artem Terehin, Vladimir M. Polukeev, Dmitry A. Varlamov, Kouassi Chariteiro, Sophie Gouy, Philippe de Parseval   +25 more
doaj   +1 more source

Ophiolites and ophiolitic melanges of Turkey: A review

, 2013
The aim of the presented study is to review the ophiolites and ophiolitic mélanges of Turkey and their importance for constraints on the evolution of the region. On the basis of the existing data, the ophiolitic associations of Turkey are classified into three main groups. 1.
Yılmaz, Ali, Yılmaz, Hüseyin
openaire   +3 more sources

Post-depositional tectonic modifications of VMS deposits in Iberia and its economic significance [PDF]

, 2011
The original stratigraphic relationships and structure of VMS deposits are commonly obscured by deformation. This can also affect their economic significance, as shown by several Iberian Pyrite Belt (IPB, SW Iberia) examples.
Castroviejo Bolibar, Ricardo, Quesada, Cecilio, Soler, Miguel   +2 more
core   +2 more sources

An overview of the evolution of the internal hellenides (Albania, Republic of North Macedonia, Greek Central Macedonia): obductions, collisions and North Aegean extension

BSGF - Earth Sciences Bulletin
The geological analysis of the Albanian-Macedonian transect constraints a framework of the Internal Hellenides in which 3 or 4 Jurassic oceanic basins opened at 174–160 Ma; they bordered the Western European Continent.
Vergély Pierre, Mercier Jacques Louis
doaj   +1 more source

Exhumation history of eastern Ladakh revealed by Ar-40/Ar-39 and fission-track ages: the Indus River-Tso Morari transect, NW Himalaya [PDF]

, 2003
Fission-track and Ar-40/Ar-39 ages place time constraints on the exhumation of the North Himalayan nappe stack, the Indus Suture Zone and Molasse, and the Transhimalayan Batholith in eastern Ladakh (NW India).
Carter, Andrew, Cosca, M., Schlup, M., Steck, A.   +3 more
core   +1 more source