Results 81 to 90 of about 516 (186)

Subduction Initiation and Early Subduction Zone Development: Insights From the P–T–t Path of the Bay of Islands Metamorphic Sole

Journal of Metamorphic Geology, Volume 44, Issue 7, Page 510-536, August 2026.
ABSTRACT The processes involved during subduction initiation (SI) remain poorly constrained, in part due to the rarity of geological archives. Ophiolites and their underlying metamorphic soles are thought to form during subduction zone infancy and may thus provide critical constraints. Metamorphic soles are derived from oceanic crust of the lower plate
François Fournier‐Roy, Carl Guilmette, Mark Coleman, Kyle Larson, Douglas K. Tinkham, Alana M. Hinchey, John Wakabayashi, Jean H. Bédard, Louise Mérit, Philippe Agard, Loïc Labrousse, Antoine Godet   +11 more
wiley   +1 more source

Natural Resources and Political Patronage in Africa: An Ethnicity Level Analysis

Review of Development Economics, Volume 30, Issue 3, Page 1957-1972, August 2026.
ABSTRACT We investigate the effect of resource discoveries on ethnicity‐level political patronage in Africa using a large geospatial dataset of 254 ethnic groups in 15 countries over the period 1960–2004. We find that the first (or single first) resource discovery in a virgin ethnic homeland increases the share of cabinet posts of that ethnicity.
Sambit Bhattacharyya, Nemera Mamo
wiley   +1 more source

Ductile Extrusion Triggered by Continental Collision in NE Brazil

Terra Nova, Volume 38, Issue 4, Page 266-277, August 2026.
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

Oligocene partial melting in the Takab metamorphic complex, NW Iran: Evidence from in situ U-Pb geochronology [PDF]

Journal of Sciences, Islamic Republic of Iran, 2013
U-Pb ages obtained on zircons from the investigated migmatites place new constraints on the evolution of the crustal rocks in the Takab area. SHRIMP U-Pb dating of inherited zircon in the melanosome parts of mafic migmatites from the Takab complex gives ...
M. Moazzen
doaj  

SINIFANÁ METASEDIMENTITES AND RELATIONS WITH CAJAMARCA PARAGNEISSES OF THE CENTRAL CORDILLERA OF COLOMBIA

Boletín de Ciencias de la Tierra, 2012
The western flank of Colombia’s Central Cordillera is characterized by N-S elongated tectonic blocks within the continental-scale Romeral and Cauca fault system.
UWE C. MARTENS, JORGE JULIÁN RESTREPO, LUIGI A. SOLARI   +2 more
doaj  

Compositional Diversity of Early Mesozoic Granites in South Qinling: Derivation from Heterogenous Basement Rocks in the Orogenic Belt

Geosciences
Granitic rocks forming in the syn- to post-orogenic stages can trace the compositional and structural complexity of the crust beneath an orogenic belt.
Risheng Ye, Weiyong Li, Dongyang Huo, Jingxin Zhao, Xiguang Huang, Jun He, Fukun Chen   +6 more
doaj   +1 more source

Rare-metal mineralization and crust-derived magmatism in a collisional orogen: the Variscan metallogenic odyssey of the Sioule region (French Massif Central)

BSGF - Earth Sciences Bulletin
The Sioule region in the northern part of the French Massif Central of the Variscan belt hosts the Echassières complex, where a large W(-Sn) quartz vein system was intruded by the Beauvoir rare-metal granite (RMG) hosting disseminated Sn, Nb-Ta and Li ...
Ballouard Christophe, Carr Patrick A., Monnier Loïs, Fidalgo Jean-Charles, Rocher Océane, Esteves Nicolas, Laurent Oscar, Daoulas-Gérardin Marie, Peiffert Chantal, Declercq Lou, Mercadier Julien, Plunder Alexis, Melleton Jérémie   +12 more
doaj   +1 more source

Tracing the provenance of inherited zircons from peraluminous granites in the Lhasa Terrane and its paleogeographic implications.

, 2011
Peraluminous granites with abundant zircon inheritance are derived from partial melting of Al-rich rocks (e.g. metapelite). Thus the U-Pb age data of inherited zircons from peraluminous granites provide insights into provenance of clastic sediments in their source region, as do the detrital zircons from sedimentary rocks (and their metamorphosed ...
Zhu, D.C., Zhao, Z.D., Niu, Y.L., Wang, Q., Dilek, Y., Guan, Q., Liu, Y.S., Mo, X.X.   +7 more
openaire   +1 more source

LA-ICP-MS Zircon U-Pb Isotopic Dating: Constraints on the Time of the Daoxiang Formation in North Fujian Province

Yankuang ceshi, 2014
Although there is poor outcrop in the area, the Daoxiang formation exposed in North Fujian has unique rock assemblage and metamorphism, and deformation characteristics show that the Daoxiang group does exist, and belongs to metamorphic rock of the ...
ZHAO Xi-lin, YU Ming-gang, JIANG Yang, LI Ya-nan, JIN Guo-dong, CHEN Zhi-hong, XING Guang-fu   +6 more
doaj  

U-Pb dating of volcaniclastic deposits from the Sinj Basin: implications for provenance and the tectono-sedimentary evolution of the External Dinarides. [PDF]

Int J Earth Sci
Šamarija R, Andrić-Tomašević N, Mandic O, Zeh A, Mužek K, Pavelić D, Schwotzer M.   +6 more
europepmc   +1 more source