Results 11 to 20 of about 2,046 (219)

The Osmium Isotope Signature of Phanerozoic Large Igneous Provinces

open access: yesGeophysical Monograph Series, Page 229-246., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Alexander J. Dickson   +2 more
wiley  

+11 more sources

The Olivine Horizon of the Layered Monchegorsk Pluton (Kola Region, Russia): Additional Magma Injection Based on Integrated Geological and Geochronological Data

open access: yesGeosciences, 2023
The paper presents the first SIMS SHRIMP U-Pb data for zircon from an olivine horizon within the Nyud intrusion of the ore-bearing layered Monchegorsk pluton (Monchepluton) in the Kola Region, Russia.
Victor Chashchin, Sergey Sergeev
doaj   +1 more source

New age constraints for metasedimentary rocks in southern Finland [PDF]

open access: yesBulletin of the Geological Society of Finland, 2023
Metasedimentary rocks from nine sampling sites in southern Finland and an intermediate dyke in one of these sites were sampled for analysis of U–Pb zircon age and geochemical composition.
Paula Salminen, Matti Kurhila
doaj   +1 more source

New U-Pb zircon age and petrogenesis of the plagiogranite, Troodos ophiolite, Cyprus [PDF]

open access: yesLithos, 2020
Abstract The Troodos ophiolite is a classic and is one of the most complete and best-studied ophiolites on Earth. However, there are few studies on the geochronology of the plagiogranite in the Troodos ophiolite. With the advancement of zircon U-Pb in situ dating method developed in recent decades, it is necessary to revisit the age of the ...
Chen, Yanhong   +4 more
openaire   +2 more sources

U-Pb LA-ICP-MS DATING OF DETRITAL ZIRCON FROM UPPER PERMIAN SANDSTONE OF THE BOYEVAYA GORA SECTION (ORENBURG REGION, SOUTHERN CIS-URALS)

open access: yesГеодинамика и тектонофизика, 2022
The first results of U-Pb LA-ICP-MS dating of 150 detrital zircon grains from the Upper Permian sandstone of the Boyevaya Gora section (Orenburg region, the Southern Cis-Urals) are presented. 95 conditional zircon U-Pb isotopic dates form two age peaks –
A. V. Chistyakova   +5 more
doaj   +1 more source

AGE AND GEODYNAMIC SETTINGS OF MIASKITE-PEGMATITES, CARBONATITES, AND Nb-Zr MINERALIZATION OF THE ILMENO-VISHNEVOGORSKY ALKALINE COMPLEX, SOUTH URAL (U-Pb AND Rb-Sr ISOTOPE DATA)

open access: yesГеодинамика и тектонофизика, 2022
The Ilmeno-Vishnevogorsky miaskite-phenite-carbonatite complex (IVС), located in the Urals folded region, is a representative of "linear type" carbonatite complexes, with which Nb-Zr deposits are associated.
I. L. Nedosekova   +3 more
doaj   +1 more source

Tectonic exhumation of the Central Alps recorded by detrital zircon in the Molasse Basin, Switzerland [PDF]

open access: yesSolid Earth, 2020
Eocene to Miocene sedimentary strata of the Northern Alpine Molasse Basin in Switzerland are well studied, yet they lack robust geochronologic and geochemical analysis of detrital zircon for provenance tracing purposes. Here, we present detrital zircon U–
O. A. Anfinson   +5 more
doaj   +1 more source

U-Pb (LA-ICPMS) zircon ages and Nd isotopes for granitoids of the Tamboril-Santa Quitéria Complex, Ceará Central Domain: implication for neoproterozoic syncollisional magmatism in north Borborema Province [PDF]

open access: yesGeologia USP. Série Científica, 2013
The Tamboril-Santa Quitéria Complex (TSQC) is one of the largest Neoproterozoic plutonic manifestations in the northBorborema Province (NE Brazil). It represents an anatectic/igneous association characterized by a number of magmaticpulses that occurred ...
Felipe Grandjean da Costa   +4 more
doaj   +1 more source

U–Pb zircon ages from the Spontang Ophiolite, Ladakh Himalaya

open access: yesJournal of the Geological Society, 2001
The Spontang Ophiolite in the Ladakh Himalaya consist of a thrust sheet of upper mantle and oceanic crustal rocks obducted onto the northern passive continental margin of India during the late Cretaceous. Precise isotopic ages of Himalayan ophiolites are presently unavailable. U–Pb dating of zircons from a dioritic segregation in the high-level gabbros
Pedersen, R, Searle, M, Corfield, R
openaire   +1 more source

Minimizing the effects of Pb loss in detrital and igneous U–Pb zircon geochronology by CA-LA-ICP-MS [PDF]

open access: yesGeochronology
Detrital zircon geochronology by laser ablation–inductively coupled plasma–mass spectrometry (LA-ICP-MS) is a widely used tool for determining maximum depositional ages and sediment provenance, as well as reconstructing sediment routing pathways ...
E. E. Donaghy   +3 more
doaj   +1 more source

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