Results 11 to 20 of about 540,378 (271)

Rb/Sr isotopic and compositional retentivity of muscovite during deformation. [PDF]

open access: yesLithos, 2015
Permian metapegmatite muscovite from the Upper-Austroalpine Matsch Unit in Southern Tyrol (Italy) was investigated regarding its Rb/Sr and compositional retentivity during Cretaceous Upper-greenschist facies deformation.
Eberlei T   +6 more
europepmc   +2 more sources

LA-ICP-MS/MS-based Rb-Sr isotope mapping for geochronology [PDF]

open access: yes, 2023
This study introduces a new approach for in-situ Rb-Sr dating that utilizes rapid line scans instead of static spot ablation, enabling the creation of two-dimensional 87Rb/86Sr and 87Sr/86Sr isotope ratio and Rb-Sr age maps.
Martin, Kutzschbach, Johannes, Glodny
core   +2 more sources

Rb-Sr dataset.xlsx

open access: yes, 2023
Rb-Sr dataset for manuscript entitled `Calibration methods for laser ablation Rb-Sr geochronology: comparisons and recommendation based on NIST glass and natural reference materials`
Stijn Glorie (4210096)
core   +1 more source

The role of crustal and mantle sources in the genesis of granitoids of the Antarctic Peninsula and adjacent crustal blocks [PDF]

open access: yes, 2001
Magmatic rocks from the Antarctic Peninsula show marked variations in isotope composition, which reflect changes in the geodynamic evolution of the peninsula through time. Most Antarctic Peninsula granitoids formed as a result of subduction: they fall on
Millar, I.L.   +3 more
core   +8 more sources

Appraisal of Six Natural Mica Reference Materials for In Situ Rb‐Sr Geochronology

open access: yesGeostandards and Geoanalytical Research, EarlyView.
I n situ mica Rb‐Sr geochronology lacks a diverse range of widely utilised reference materials. Here, we characterize and evaluate six natural mica reference materials to test their suitability
Jarred C. Lloyd   +38 more
core   +2 more sources

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

GEOCHEMISTRY OF TRACE ELEMENTS IN ROCK-FORMING MINERALS OF GNEISSES AND GRANITES OF THE MURZINKA GRANITE AREA, CENTRAL URALS [PDF]

open access: yesМинералогия, 2020
The Murzinka granite area (Central Urals), which combines Murzinka granite pluton and underlying rocks of the Murzinka-Adui metamorphic complex, exhibits an evident WE-trending geochemical zonation of magmatism with increasing of Rb, Li, Nb and Ta ...
S.V. Pribavkin   +2 more
doaj   +1 more source

Rb-Sr, Sm-Nd ages of the Phalaborwa Carbonatite Complex, South Africa [PDF]

open access: yes, 2005
P(論文)We analyzed Rb-Sr and Sm-Nd isotopic compositions of whole-rock and minerals from syenite, biotite gneiss xenolith, dolerite dyke, phoscorite, and carbonatite from the Phalaborwa Carbonatite Complex located in northeastern Transvaal, South Africa ...
Hirahara, Yuka   +3 more
core   +1 more source

On the age of pyrochlore carbonatites from the Ilmeno-Vishnevogorsky Alkaline Complex, the Southern Urals (insights from Rb-Sr and Sm-Nd isotopic data)

open access: yesЛитосфера, 2020
Research subject. In this research, we carried out Sm-Nd- и Rb-Sr-dating of pyrochlore carbonatite from the Vishnevogorsky niobium deposit, Ilmeno-Vishnevogorsky Alkaline Complex, Southern Urals.
I. L. Nedosekova   +5 more
doaj   +1 more source

Resetting and closing codition of Rb-Sr whole-rock isochron system: some samples of metamorphic and granitic rocks from the Gondwana super-continent and Japan Arc [PDF]

open access: yes, 2003
P(論文)The closure temperature of the Rb-Sr whole-rock system for felsic rocks has been generally considered to be ca. 700゜C, but it falls to ca. 400゜C, as a result of efficient action of fluids,especially H_2O.
Owada, Masaaki   +5 more
core   +1 more source

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