Results 41 to 50 of about 85,116 (273)

The timing of Barleik Formation and its implication for the Devonian tectonic evolution of Western Junggar, NW China

Open Geosciences, 2021
The timing of Barleik Formation in Xinjiang, NW China, has not been constrained by accurate geochronology yet, while this work is of great significance to help reconstruct the geological tectonic evolution of Western Junggar.
Hui Yuanxiu, Wang Ran, Li Lu, Lin Jingyu, Xiao Zhouxuan, Xin Yonghui, Luo Xin   +6 more
doaj   +1 more source

New zircon U-Pb dating and review of geological and geochronological data with implications for lithostratigraphy and crustal evolution of North Borborema Province, northeastern Brazil

Journal of the Geological Survey of Brazil, 2022
The northern portion of the Borborema Province, located north of the Patos Shear Zone (northeast of Brazil) is formed by litho-stratigraphic units dating from the Archean to the Neoproterozoic, with complex evolution resulting from several orogenic and ...
Tercyo Pinéo, Felipe Grandjean da Costa, Camila Franco Basto, Joseneusa Brilhante Rodrigues, Vladimir Cruz de Medeiros, Edney Smith de Moraes Palheta, Bruno de Oliveira Calado, Rogério Cavalcante, Raissa Beloti de Mesquita, Frank Gurgel Santos, Débora Melo Ferrer de Morais, Jocilene dos Santos Santana   +11 more
doaj   +1 more source

Zircon ages in granulite facies rocks: decoupling from geochemistry above 850 °C? [PDF]

, 2018
Granulite facies rocks frequently show a large spread in their zircon ages, the interpretation of which raises questions: Has the isotopic system been disturbed? By what process(es) and conditions did the alteration occur?
A Boriani, A Boriani, A Henk, A Langone, A Mulch, A Mulch, A Möller, A Zanetti, A Zingg, A Zingg, A-M Seydoux-Guillaume, AE Hofmann, B Bingen, B Schnetger, Barbara E. Kunz, BE Kunz, BE Kunz, C Annen, C Paton, C Paton, C Redler, C Redler, C Yakymchuk, CR McFarlane, CR McFarlane, D Regis, D Rubatto, D Rubatto, D Rubatto, D Rubatto, D Rubatto, Daniele Regis, DE Kelsey, DE Kelsey, DJ Cherniak, DJ Cherniak, DM Fountain, DM Fountain, E Rutter, EB Watson, EB Watson, EM Peterman, F Corfu, F Tomaschek, FJ Korhonen, G Bigi, G Fraser, G Peressini, G Rivalenti, G Rivalenti, G Vavra, G Vavra, GL Luvizotto, H Berckhemer, H Degeling, H Voshage, IS Williams, IS Williams, J Hermann, J Pape, J Sláma, JA Baldwin, JA Petrus, JE Quick, JE Quick, JF Diener, JW Valley, K Mezger, KR Mehnert, L Nasdala, L Nasdala, L Schiøtte, M Bertolani, M Bertolani, M Guillong, M Kohn, M Tichomirowa, MA Kusiak, MA Kusiak, Martin Engi, MJ Whitehouse, MP Roberts, MR Handy, MR Handy, NE Timms, NE Timms, NJ Pearce, NM Kelly, P Monjoie, P Vonlanthen, PW Hoskin, PW Hoskin, PW Hoskin, R Schuster, RC Ewing, RJ Taylor, RM Flowers, RT Pidgeon, S Barboza, S Barboza, S Bodorkos, S Capedri, S Piazolo, S Sinigoi, S Sinigoi, S Sinigoi, SE Jackson, SH Vorhies, SL Harley, SM Reddy, SM Schmid, SM Schmid, T Geisler, T Geisler, TA Ewing, U Schaltegger, U Schaltegger, U Schaltegger, U Schaltegger, US Klötzli, WF McDonough   +120 more
core   +1 more source

Bulk inclusion micro-zircon U-Pb geochronology: a new tool to date low-grade metamorphism [PDF]

Goldschmidt2022 abstracts, 2021
AbstractDating low‐grade metamorphism is challenging since such rocks commonly lack suitable target minerals for acquiring pressure–temperature–time–deformation (P–T–t–d) data. Herein a new geochronological method termed ‘bulk inclusion dating’ is applied to a chloritoid‐bearing schist from the Staufen‐Höllengebirge Nappe (SHN, Austroalpine Unit ...
Hollinetz, M. Sophie, Schneider, David A., McFarlane, Christopher R. M., Huet, Benjamin, Rantitsch, Gerd, Grasemann, Bernhard   +5 more
openaire   +2 more sources

New dinosaur (Theropoda, stem-Averostra) from the earliest Jurassic of the La Quinta formation, Venezuelan Andes [PDF]

Royal Society Open Science, 2014
Dinosaur skeletal remains are almost unknown from northern South America. One of the few exceptions comes from a small outcrop in the northernmost extension of the Andes, along the western border of Venezuela, where strata of the La Quinta Formation have
Max C. Langer, Ascanio D. Rincón, Jahandar Ramezani, Andrés Solórzano, Oliver W. M. Rauhut   +4 more
doaj   +1 more source

Petrography, geochemistry and zircon U-Pb geochronology of the Siderian-Rhyacian granitoids of NW Bacajá Domain, Amazonian Craton

Journal of the Geological Survey of Brazil, 2022
Archean and Paleoproterozoic granitoids with different geochemical affinities are widely distributed in the basement of high-grade metamorphic rocks of the Bacajá Domain, which consists of Rhyacian granite-greenstone terrain with Archean-Siderian ...
Cleberson Vieira da Silva, Wagner Silva Amaral, Felipe Holanda dos Santos   +2 more
doaj   +1 more source

U–Pb dating and Sm–Nd isotopic analysis of granitic rocks from the Tiris Complex : new constaints on key events in the evolution of the Reguibat Shield, Mauritania [PDF]

, 2012
The Reguibat Shield of N Mauritania and W Algeria represents the northern exposure of the West African Craton. As with its counterpart in equatorial West Africa, the Leo Shield, it comprises a western Archaean Domain and an eastern Palaeoproterozoic ...
Abdouloye, T.B., Darbyshire, F., Gillespie, M., Horstwood, M.S.A., O'Connor, E.A., Pitfield, P.E.J., Schofield, D.I.   +6 more
core   +1 more source

Detrital zircon U–Pb geochronology and geochemistry of the Riachuelos and Palma Sola beach sediments, Veracruz State, Gulf of Mexico: a new insight on palaeoenvironment

Journal of Palaeogeography, 2020
Zircons are abundant in the beach sediments. In this study, surface microtexture, mineralogy, bulk sediment geochemistry, trace element composition and U–Pb isotopic geochronology of detrital zircons collected from the Riachuelos and Palma Sola beach ...
J. Armstrong-Altrin
semanticscholar   +1 more source

Detrital zircon provenance and paleogeography implications for Furnas Formation in the northwest of Paraná Basin [PDF]

Geologia USP. Série Científica, 2015
In the northwest of the Paraná Basin, between the states of Mato Grosso and Goiás, there are exposures of the Furnas Formation, where the Transbrasiliano Lineament is also recognized.
Thais Borba Santos, Fernando Mancini, Leonardo Fadel Cury, Francisco José Fonseca Ferreira   +3 more
doaj   +1 more source

Timing, sequence, duration and rate of deformation in fold-and-thrust belts: a review of traditional approaches and recent advances from absolute dating (K–Ar illite/U–Pb calcite) of brittle structures

Comptes Rendus. Géoscience, 2023
Based on a review of literature and a few case studies, this paper summarizes the state of the art on the dating of folds and thrusts, then presents and discusses how recent advances in K–Ar illite and U–Pb calcite geochronology applied to brittle ...
Lacombe, Olivier, Beaudoin, Nicolas Emmanuel   +1 more
doaj   +1 more source