Results 31 to 40 of about 49,779 (247)

Radiometric Constraints on the Timing, Tempo, and Effects of Large Igneous Province Emplacement

open access: yesGeophysical Monograph Series, Page 27-82., 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.
Jennifer Kasbohm   +2 more
wiley  

+1 more source

In situ observation of biotite (001) surface dissolution at pH 1 and 9.5 by advanced optical microscopy

open access: yesBeilstein Journal of Nanotechnology, 2015
Laser confocal differential interference contrast microscopy (LCM-DIM) allows for the study of the reactivity of surface minerals with slow dissolution rates (e.g., phyllosilicates).
Chiara Cappelli   +4 more
doaj   +1 more source

Electron Microprobe Analysis of Biotite with Reequilibration Texture in Altered Trachyte

open access: yesYankuang ceshi, 2019
BACKGROUND The chemical composition of biotite contains important genetic information. The in-situ analyses of biotite with metasomatic texture can reflect the migration of the elements during the metasomatic alteration, and provide mineralogical ...
NIE Xiao   +4 more
doaj   +1 more source

U-Pb SHRIMP zircon dating of Grenvillian metamorphism in Western Sierras Pampeanas (Argentina) : correlation with the Arequipa-Antofalla craton and constraints on the extent of the Precordillera Terrane [PDF]

open access: yes, 2006
The Sierras Pampeanas of Argentina, the largest outcrop of pre-Andean crystalline basement in southern South America, resulted from plate interactions along the proto-Andean margin of Gondwana, from as early as Mesoproterozoic to Late Paleozoic times (e ...
C. Mark Fanning   +31 more
core   +4 more sources

Anomalously old biotite 40Ar/39Ar ages in the NW Himalaya [PDF]

open access: yes, 2017
Biotite 40Ar/39Ar ages older than corresponding muscovite 40Ar/39Ar ages, contrary to the diffusion properties of these minerals, are common in the Himalaya and other metamorphic regions.
Grujic, Djordje   +6 more
core   +1 more source

The Polumir granite: Addititional data on its origin [PDF]

open access: yesGeološki Anali Balkanskoga Poluostrva, 2002
The Polumir granite is exposed on several localities due to erosion, and its chemical and mineral composition is presented in this paper. It is built of K-feldspar, plagioclase, myrmekite, metasomatic albite, biotite, muscovite and quartz, while apatite,
Vukov Milenko S., Milovanović Dragan
doaj   +1 more source

Determination of physicochemical conditions of causative intrusion in the Masjeddaghi Cu-Au porphyry-epithermal deposit: constraints on chemical composition of biotite

open access: yesJournal of Economic Geology, 2022
The Masjeddaghi porphyry-epithermal Cu-Au deposit has located in the western part of the Alborz-Azarbaijan zone; in the south margin of Lesser Caucasus.
Shohreh Hassanpour   +2 more
doaj   +1 more source

Temporal Dynamics of Potassium Release from Waste Mica as Influenced by Potassium Mobilizing Bacteria

open access: yesJournal of Pure and Applied Microbiology, 2023
Potassium mobilizing bacteria (KMB) strains have been isolated from waste mica mines in the Giridih district of Jharkhand, India, using Alexandrov media.
Saibal Ghosh   +4 more
doaj   +1 more source

A literature review on thermodynamic sorption models of radionuclides with some selected granitic minerals

open access: yesFrontiers in Nuclear Engineering, 2023
The literature for radionuclide sorption on four common granitic minerals have been surveyed. Mainly, such studies were modelling using Thermodynamic Sorption Models were investigated. Although the studies give a far from concerted results, they agree on
Stellan Holgersson, Pawan Kumar
doaj   +1 more source

Late Cenozoic metamorphic evolution and exhumation of Taiwan [PDF]

open access: yes, 2007
The Taiwan mountain belt is composed of a Cenozoic slate belt (Hsuehshan Range units, HR, and Backbone Slates, BS) and of accreted polymetamorphic basement rocks (Tananao Complex, TC).
Avouac, Jean-Philippe   +6 more
core   +4 more sources

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