Results 41 to 50 of about 1,682 (219)

U-Pb ZIRCON GEOCHRONOLOGY FROM THE GREATER CAUCASUS PALEOZOIC COMPLEXES: NEW DATA AND TECTONIC IMPLICATIONS

Геодинамика и тектонофизика
New data have been obtained on the U-Pb LA-ICP-MS age of detrital zircons from the Middle-Late Carboniferous and Early-Middle Permian molasses of the Greater Caucasus.
V. A. Kamzolkin, A. V. Latyshev, V. B. Khubanov, A. V. Chistyakova, M. Yu. Shur, R. V. Veselovskiy, I. A. Nesterova, Yu. P. Vidyapin   +7 more
doaj   +1 more source

Heterogeneous Exhumation Mechanisms in Neoproterozoic Collisional Metamorphism: P–T Constraints From Pelotas and Punta del Este Terranes, Southern Brazil and Uruguay

Geological Journal, EarlyView.
Petrography, thermobarometry, and pseudosection modelling reveal peak metamorphic conditions of 3–7.5 kbar and 520°C–800°C in Tonian‐Cryogenian orthogneisses of the Dom Feliciano Belt. Metamorphic field gradients of 27°C/km–39°C/km and variable exhumation mechanisms support correlation of these units as remnants of a Himalayan‐type Piratini Orogeny ...
Thaiane Niederauer‐Santos, Carla Cristine Porcher, Daniel Triboli Vieira, Edinei Koester, Diego Jaldín, Karina Luengo, Luisa Caon   +6 more
wiley   +1 more source

Zircon U-Pb Age Determination of Volcanic Eruptions in Lutao and Lanyu in the Northern Luzon Magmatic Arc

Terrestrial, Atmospheric and Oceanic Sciences, 2014
This paper reports for the first time zircon U-Pb ages of volcanic rocks and sands from Lutao and Lanyu, two islets off SE Taiwan in the north Luzon arc.
Wen-Yu Shao, Sun-Lin Chung, Wen-Shan Chen   +2 more
doaj   +1 more source

U-Pb ages and Nd isotope characteristics of the lateorogenic, migmatizing microcline granites in southwestern Finland [PDF]

Bulletin of the Geological Society of Finland, 2005
U-Pb ages and whole-rock Nd isotope data have been obtained from the Paleoproterozoic lateorogenic migmatizing microcline granites of southwestern Finland.
M. Kurhila, M. Vaasjoki, I. Mänttäri, T. Rämö, M. Nironen   +4 more
doaj   +1 more source

Miocene to Quaternary Tectonostratigraphic Evolution of the Northern Section of the Burdur‐Fethiye Shear Zone, South‐Western Türkiye

Geological Journal, EarlyView.
New zircon ages reveal that lacustrine sedimentation initiated in the Late Miocene (Messinian), revising earlier Pliocene age assignments. The study results support the interpretation of the northern BFSZ as a broad left‐lateral transtensional shear zone rather than a discrete sinistral fault or simple extensional graben array.
İrem Elitez, Gürsel Sunal, Cenk Yaltırak, İsak Yılmaz   +3 more
wiley   +1 more source

Zircon Dates Long‐Lived Plume Dynamics in Oceanic Islands

Geochemistry, Geophysics, Geosystems, 2022
In this contribution we report the first systematic study of zircon U‐Pb geochronology and δ18O‐εHf(t) isotope geochemistry from 10 islands of the hot‐spot related Galapagos Archipelago.
Yamirka Rojas‐Agramonte, Boris J. P. Kaus, Andrea Piccolo, Ian S. Williams, Axel Gerdes, Jean Wong, HangXian Xie, Stephan Buhre, Theofilos Toulkeridis, Pilar Montero, Antonio Garcia‐Casco   +10 more
doaj   +1 more source

Glass from Teniky (Madagascar): Geochemical Evidence for Multiple Production Systems and Long‐Distance Exchange in the Mediaeval Indian Ocean

Archaeometry, EarlyView.
ABSTRACT The inland rock‐cut site of Teniky, located in the Isalo massif of southern Madagascar, represents an exceptional archaeological context recently dated to the 11th–12th centuries ad, corresponding to the early phases of settlement on the island.
Jean Rodier, Bernard Gratuze, Vincent Serneels   +2 more
wiley   +1 more source

Provenance reconstructions. Article 4. Modern methods for investigating detrital minerals (zircon, apatite)

Литосфера, 2020
Research subject. This article aims to review modern methods for investigating detrital zircons and apatites used as mineral indicators of the composition and age of distributive provinces. Materials and methods.
L. V. Badida, A. V. Maslov, G. A. Mizens
doaj   +1 more source

Provenance of zircon of the lowermost sedimentary cover, Estonia, East-European Craton [PDF]

Bulletin of the Geological Society of Finland, 1999
Bulk and accessory mineral composition of fresh and weathered crystalline rocks, and sedimentary deposits overlying the crystalline-sedimentary unconformity have been examined in core samples from 28 drill holes in Estonia.
M. Konsa, V. Puura
doaj   +1 more source

ReMoDe – Recursive modality detection in distributions of ordinal data

British Journal of Mathematical and Statistical Psychology, EarlyView.
Abstract The detection of the number of modes in distributions of ordinal data is relevant for applied researchers across disciplines, from uncovering polarization to detecting incidence groups in clinical symptom scales. Yet, established modality detection methods are either purely descriptive or not developed for ordinal data.
Madlen Hoffstadt, Lourens Waldorp, Javier Garcia‐Bernardo, Han van der Maas   +3 more
wiley   +1 more source