Results 51 to 60 of about 5,077 (206)

Geochemistry of serpentinites from the central portion of the Rio Piranhas-Seridó Domain, Borborema Province, Northeastern Brazil: Implications for genesis and geotectonic environment

Journal of the Geological Survey of Brazil
Serpentinites from the central portion of the Rio Piranhas-Seridó Domain (RPSD), in the northeast portion of the Borborema Province (BP), occur in association with the Caicó Complex gneisses, paragnaisses/schists of the Seridó Group.
Frank Gurgel Santos, Mario Cavalcanti Neto, Valderez Ferreira, Anelise Bertotti   +3 more
doaj   +1 more source

Protolith age of Santa Maria Chico granulites dated on zircons from an associated amphibolite-facies granodiorite in southernmost Brazil

Anais da Academia Brasileira de Ciências, 2008
U-Pb dating of zircon was undertaken with the Beijing SHRIMP II (sensitive high resolution ion microprobe) on anamphibolite facies granodiorite and an almandine-albite granulite from the Santa Maria Chico Granulitic Complex, southern Brazilian Shield ...
Léo A. Hartmann, Dunyi Liu, Yenbin Wang, Hans-Joachim Massonne, João O.S. Santos   +4 more
doaj   +1 more source

Comparative geochemical and facies analysis of Bangam bauxite deposits, West Cameroon

Geology, Ecology, and Landscapes
Bauxite exploration in West Cameroon has relied on morphological facies description, leaving the geochemical controls on facies differentiation and protolith identity poorly constrained.
Franck Wilfried Nguimatsia Dongmo, Marc Anselme Kamga, Aurélie Ngamy Kamwa, Roger Firmin Donald Ntouala, Yanick Brice Lemdjou, Iris Nchang Fofang, Rose Yongue Fouateu   +6 more
doaj   +1 more source

Late Cenozoic Sediment Provenance in the Northern Canterbury Basin, Aotearoa New Zealand

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 4, December 2026.
Late Cenozoic strata of the northern Canterbury Basin record uplift and erosion of mountain ranges adjacent to the transition from oblique subduction to strike‐slip on the Australian–Pacific plate boundary. Using the provenance of conglomerate clasts and sandstone samples, we reconstruct sediment transport pathways and, by inference, exhumation and ...
Matthew O. Parker, Kari N. Bassett, Matthew W. Sagar, Alexander R. L. Nichols, Greg H. Browne, Andrew Nicol   +5 more
wiley   +1 more source

Geochemistry of eclogite- and blueschist-facies rocks from the bantimala complex, south sulawesi, indonesia: Protolith origin and tectonic setting

, 2015
We present the first data on bulk-rock major and trace element compositions for a suite of eclogite- and blueschist-facies rocks from the Bantimala Complex, Indonesia, with the aim of better constraining the protolith origins and nature of the subducted
Christy, Andrew, IMAI, AKIRA, Watanabe, Koichiro, Ellis, David, Maulana, Adi   +4 more
core   +1 more source

Protolith nature and P – T evolution of Variscan metamorphic rocks from the Allahyarlu complex, NW Iran

, 2020
International audienceMetamorphic rocks associated with ophiolitic rocks occur on the eroded surface of a NW–SE-trending anticline in the Allahyarlu area, NW Iran, between the Caucasus and Zagros orogenic belts. Metapelitic rocks consist mainly of quartz,
Rolland, Yann, Moazzen, Mohssen, Hajialioghli, Robab, Bröcker, Michael, Salimi, Zohreh   +4 more
core   +1 more source

Tracing Orogenic Evolution From Multi‐Detrital Mineral Records: U‐Pb Geochronology and Trace‐Element Constraints From Glacial Diamictites

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract Integrating multiple detrital mineral systems provides a powerful framework for reconstructing source‐region tectonothermal evolution because different minerals record complementary aspects of magmatic and metamorphic processes. Glacial diamictites are particularly valuable for this approach because extensive glacial erosion can sample broad ...
Lijun Wang, Shoufa Lin, Wenjiao Xiao, Cees R. van Staal, Chris R. M. McFarlane, Zhijun Niu, Fang Song, Qihang Wu   +7 more
wiley   +1 more source

Evidence for ca. 2046 Ma high-grade metamorphism in Paleoproterozoic metasedimentary rocks of the northern Borborema Province, NE Brazil: constraints from U-Pb (LA-ICP-MS) zircon ages

Journal of the Geological Survey of Brazil, 2019
This study presents LA-ICP-MS U-Pb detrital zircon ages on a migmatitic paragneiss of the Jaguaretama Complex, northern Borborema Province, NE-Brazil.
Bruno de Oliveira Calado, Felipe Grandjean Costa, Iaponira Paiva Gomes, Joseneusa Brilhante Rodrigues   +3 more
doaj   +1 more source

Slow‐to‐Fast Deformation in Mafic Fault Rocks on an Active Low‐Angle Normal Fault, Woodlark Rift, SE Papua New Guinea

Geochemistry, Geophysics, Geosystems, 2020
Slip on the active Mai'iu low‐angle normal fault in Papua New Guinea that dips 15–24° at the surface has exhumed in its footwall a single, continuous fault surface across a >25‐km‐wide dome.
M. Mizera, T. Little, C. Boulton, D. Prior, E. Watson, J. Biemiller, J. White, Norio Shigematsu   +7 more
doaj   +1 more source

Mantle Wedge Metasomatism During Subduction Initiation: Mineral Transformations and Fluid Fluxes (BOIC Ophiolite, Newfoundland)

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract The soles of ophiolites preserve slices of oceanic crust metamorphosed to amphibolite‐ to granulite‐facies conditions beneath heavily deformed mantle peridotites, providing key records of fluid and mass transfer across nascent subduction interfaces.
Louise Mérit, Philippe Agard, Loïc Labrousse, Benoît Dubacq, Cécile Prigent, Carl Guilmette, Jean H. Bédard, François Fournier‐Roy, Horst R. Marschall, Axel Gerdes, Benjamin Lefeuvre, Alana Hinchey   +11 more
wiley   +1 more source