Results 11 to 20 of about 29,586 (208)

Large Igneous Provinces (LIPs) and Anoxia Events in “The Boring Billion”

open access: yesGeophysical Monograph Series, Page 449-486., 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.
Shuan‐Hong Zhang   +4 more
wiley  

+1 more source

Geothermobarometry of Sarmeshk granitoids in the Northwest of Sarduiyeh [PDF]

open access: yesپترولوژی, 2018
The Sarmeshk granitoid pluton is located in southeast of the Urumieh-Dokhtar magmatic zone in the Kerman province. Based on petrographic studies, the granitoid consist of three rock type of diorite, granodiorite and monzogranite. They are mainly composed
Asma Nazarinia   +3 more
doaj   +1 more source

Experimental constraints on amphibole stability in primitive alkaline and calc-alkaline magmas [PDF]

open access: yes, 2017
Equilibrium crystallization experiments were carried out on two primitive basaltic rocks (APR16: Na2O+K2O=4.40 wt%; CM42: Na2O+K2O=2.59 wt%) with the aim to investigate the amphibole stability in the differentiation processes at deep crustal level, of
Bonechi, Barbara   +4 more
core   +1 more source

Amphibole and biotite of melanocratic rocks from the Ural granitic massifs: composition, relationship, petrogenetic consequences

open access: yesЛитосфера, 2020
Research subject. The article discusses the features of the relationship between biotite and amphibole on the example of magmatogene melanocratic rocks from a number of granitoid massifs of the Urals. These rocks form xenoliths and synplutonic intrusions
S. V. Pribavkin
doaj   +1 more source

Amphibole: A major carrier of helium isotopes in crustal rocks [PDF]

open access: yes, 2016
The first evidence for a specific role of amphiboles in He isotope balance of crustal rocks was presented in early contributions by Gerling et al. (1971, 1976).
A.B. Verchovsky   +65 more
core   +1 more source

Chemical and structural characterization of fibrous richterite with high environmental and health relevance from Libby, Montana (USA) [PDF]

open access: yes, 2016
This study reports new structural and spectroscopic data of a sample of fibrous richterite from Libby, Montana (USA). The OH-stretching region was investigated by FT-IR. The spectrum showed, except for the typical absorption band at 3671 cm-1 assigned to
BALLIRANO, Paolo, PACELLA, Alessandro
core   +1 more source

Phase Diagrams of Carbonate Materials at High Pressures, with Implications for Melting and Carbon Cycling in the Deep Earth

open access: yesGeophysical Monograph Series, Page 137-165., 2020

This book is Open Access. A digital copy can be downloaded for free from Wiley Online Library.

Explores the behavior of carbon in minerals, melts, and fluids under extreme conditions

Carbon trapped in diamonds and carbonate-bearing rocks in subduction zones are examples of the continuing exchange of substantial carbon ...
Konstantin Litasov   +3 more
wiley  

+1 more source

A neoproterozoic age for the chromitite and gabbro of the Tapo Ultramafic Massif, Eastern Cordillera, Central Peru, and its tectonic implications [PDF]

open access: yes, 2011
The ultramafic-mafic rocks of the Tapo Complex are exposed in the Eastern Cordillera of the Central Peruvian Andes. This complex is composed of serpentinised peridotites and metabasites with some podiform chromitite lenses and chromite disseminations and
Amaral   +25 more
core   +3 more sources

A reactive assimilation model for regional-scale cordierite-bearing granitoids: geochemical evidence from the Late Variscan granites of the Central Iberian Zone, Spain [PDF]

open access: yes, 2008
Regional scale biotite and cordierite-bearing granites (s.l.) in the Variscan of the Central Iberian Zone (CIZ) are spatially closely associated with cordierite-rich nebulites and cordierite-bearing two-mica granites, and with cordierite-rich high grade ...
Carnicero, A.   +3 more
core   +1 more source

EMPHATIZATION OF MARGINAL OVERTONS OF MEANING IN PSYCHOLOGICAL NARRATIVE

open access: yesГуманитарные и юридические исследования, 2021
He article analyzes the basic techniques of em-phatizing marginal overtones of the meaning hierarchy, which develop based on the peripheral components of the socio-cultural concept and value space within the framework of grotesque verbalization forms ...
N. Pelevina, K. Kurishko
doaj  

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