Results 11 to 20 of about 242 (121)

First evidence for the subduction initiation and boninitic magmatism from the Armutlu Peninsula (NW Turkey): geodynamic significance for the Cadomian magmatic arc system of the Gondwanan margin

, 2021
The Cadomian Orogeny was active along the northern margin of Gondwanaland during the Late Neoproterozoic–Early Cambrian period. Remains of this orogenic activity are traced from Western Europe to the Himalayas, including some metamorphic basement rocks ...
Namık Aysal (4325140), Özge Karslıoğlu (11553602), Zeynep Özbey (2840903)   +2 more
core   +2 more sources

Does Neoproterozoic-Early Paleozoic (570–530 Ma) basement of Iran belong to the Cadomian Orogeny?

Precambrian Research, 2022
Abstract Late Neoproterozoic–Early Paleozoic basement in Iran mainly comprises granites and mafic rocks locally affected by high-grade metamorphism. In this contribution, we collate whole rock chemical data for more than 600 samples; Sr–Nd isotope data for 200 samples; and zircon U-Pb ages of > 2500 grains.
Hossein Azizi, Scott A. Whattam
openaire   +1 more source

The Cadomian Orogeny revisited in northern Brittany (France)

, 1996
E. Egal, C. Guerrot, E. Le Goff, D. Thiéblemont, J. Chantraine   +4 more
openaire   +2 more sources

Low–Ti Continental Tholeiite Origin of Magmas With Calc‐Alkaline Signature in Transcurrent Settings: The Mississippian Matachel Volcanic Field (SW Iberian Massif)

Geochemistry, Geophysics, Geosystems, Volume 24, Issue 11, November 2023., 2023
Abstract In the Mississippian Matachel small volcanic field of the Ossa‐Morena Zone (southern Iberian Massif) outpoured basic‐intermediate lavas exhibit geochemical characteristics of Low‐Ti continental tholeiites and calc‐alkaline lavas. Low‐Ti continental tholeiites integrate two contrasting groups of rocks: basalts (Mg#: 54 to 70; Ti/Zr: 61–79; LaN ...
F. Sarrionandia, J. Errandonea‐Martin, E. Larrondo, M. Carracedo‐Sánchez, B. Ábalos, J. I. Gil Ibarguchi   +5 more
wiley   +1 more source

New magnetotelluric data through the boundary between the Ossa Morena and Centroiberian Zones [PDF]

, 2005
The south-western part of the Iberian Peninsula, including the southern branch of the Iberian Massif, has recently been the subject of several magnetotelluric (MT) studies.
Almeida, E., Paz, C., Heise, W., Pous, Jaume, Muñoz Soler, Gerard, Monteiro Santos, F., Pous, J., Pous i Fábregas, Jaume, Heise, Wiebke, Paz, Maria Catarina, Muñoz, G., Almeida, Eugénio, Monteiro Santos, F. A., Monteiro Santos, Fernando   +13 more
core   +1 more source

Tectonostratigraphy of the Mérida Massif reveals a new Cadomian suture zone exposure in Gondwana (SW Iberia)

, 2021
Neoproterozoic and Palaeozoic rocks of the Mérida Massif (SW Iberia) have been grouped into tectonostratigraphic units. Each unit is separated from the rest ones by either crustal-scale thrusts and/or extensional detachments.
Díez Fernández, Rubén, Arenas Martín, Ricardo, Sánchez Martínez, Sonia, Rojo-Pérez, Esther, Fuenlabrada Pérez, José Manuel   +4 more
core   +1 more source

Complex geochronological record of an emblematic Variscan eclogite (Haut‐Allier, French Massif Central)

Journal of Metamorphic Geology, Volume 41, Issue 7, Page 967-995, September 2023., 2023
Abstract Two eclogite samples from the Haut‐Allier record a prograde evolution from ~20 kbar, 650°C to 750°C, 22–23 kbar followed by heating up to 850–875°C and partial melting. Incipient decompression in high‐pressure granulite facies conditions (19.5 kbar, 875°C) was followed by exhumation to high‐temperature amphibolite facies conditions (<9 kbar ...
Luc de Hoÿm de Marien, Pavel Pitra, Marc Poujol, Nathan Cogné, Florence Cagnard, Benjamin Le Bayon   +5 more
wiley   +1 more source

Cadomian (Ediacaran-Cambrian) arc magmatism in the Bitlis Massif, SE Turkey: Magmatism along the developing northern margin of Gondwana

, 2021
Small granitic plutons and associated granitic dykes that intrude the pre-Devonian basement of the Bitlis Massif were previously inferred to have a broadly Late Palaeozoic crystallisation age related to the Hercynian orogeny; this was tested during this ...
Collins, Alan S., Ustaomer, Timur, Robertson, Alastair H. F., USTAÖMER, Petek Ayda   +3 more
core   +2 more sources

Crustal Imaging of Portugal Mainland Using Magnetotelluric Data

Earth and Space Science, Volume 10, Issue 7, July 2023., 2023
Abstract The comprehensive mapping of resistivities in depth and its interpretation is of great importance to unravel the electrical properties of deep‐seated rocks, providing significant insights into the structure of the crust. The first 3D resistivity model for Portugal mainland is here reported using data from 31 broadband MT soundings spaced 50 ...
P. Baltazar‐Soares, F. J. Martínez‐Moreno, J. Alves Ribeiro, F. A. Monteiro Santos, P. Ribeiro, M. A. Pais, A. Mateus, J. Pous   +7 more
wiley   +1 more source

Geochemical and Isotopic Characteristics of the Protolith of Eclogites from the North Shahrekord Metamorphic Complex: Evidence of Late Neoproterozoic Back-arc Basin development in Sanandaj-Sirjan Zone

Journal of Economic Geology, 2019
Introduction All of the major tectonic zones of Iran, except for the Kopet-Dagh, contain Pan-African crystalline basement. Subduction of the Proto-Tethys at about 630 Ma caused Cadomian arc– and backarc magmatism in the northern margin of Gondwana ...
Forough Malek Mahmoudi, Ali Reza Davoudian Dehkordy, Nahid Shabanian Boroujeni, Hossein Azizi   +3 more
doaj   +1 more source