Results 231 to 240 of about 7,592,442 (289)

Unravelling pre-eruptive P-T conditions by machine learning

2020
<p>Clinopyroxene based thermometers and barometers are widely used tools for estimating temperature and pressure conditions under which magmas are stored before eruptions.</p><p>Several studies reported the development and the application of Clinopyroxene–liquid geothermobarometers in ...
Maurizio Petrelli, Luca Caricchi, Diego Perugini   +2 more
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Aluminous Granulites of the Archean Craton of Kasai (Zaire): Petrology and P-T Conditions

Journal of Petrology, 1988
Aluminous granulites of the Archean (2·8 Ga) Kasai craton (Zaire) consist of two main mineral assemblages: Grt-Opx and Sil±Grt±Crd rocks.The high-grade metamorphic conditions as deduced from Grt-Opx and Grt-Opx-Pl-Qtz equilibria are 720°C-6·7 kb.
Bingen, Bernard, Demaiffe, Daniel, Delhal, Jacques   +2 more
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Madras Granulites: Geochemistry and P-T Conditions of Crystallisation

1978
Abstract A study of the major and trace element geochemistry of Madras granulites has been made using 64 representative samples from the Pallavaram area. They can be divided into four geochemically distinct rock groups: meta-igneous pyroxene granulites, metagabbros and charnockites, and metasedimentary khondalites.
B.L. Weaver, J. Tarney, B.F. Windley, E.B. Sugavanam, V. Venkata Rao   +4 more
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Homoclinic Solutions for p(t)-Laplacian–Hamiltonian Systems Without Coercive Conditions

Mediterranean Journal of Mathematics, 2015
The authors are concerned with the existence and multiplicity of homoclinic solutions for the following second-order \(p(t)\)-Laplacian Hamiltonian system \[ \frac{d}{dt}\Big(\left|\dot{u}(t)\right|^{p(t)-2}\dot{u}(t)\Big)-a(t)\left|u(t)\right|^{p(t)-2}u(t)+\nabla W(t,u(t))=0, \eqno(1) \] where \(t\in\mathbb{R}\), \(u\in\mathbb{R}^{n}\), \(p\in C ...
Zhang, Ziheng, Xiang, Tian, Yuan, Rong
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E-BN crystallization under thermodynamic instability (p,T) conditions

Diamond and Related Materials, 1992
Abstract The effect of electrons and photons upon the formation of the E-BN phase under conditions of its thermodynamic instability was examined. It has been found that, when enhanced with the electrons emitted from an electrode tip maintained at an appropriately high electric potential (V>4kV), the reaction of chemical synthesis carried out in a ...
A. Sokołowska, A. Olszyna
openaire   +1 more source

P-T-a(H2O) Conditions in the Thermal Aureole

1991
In this chapter estimates are made of the pressure of emplacement of the Ballachulish Igneous Complex and the range of maximum temperatures in the surrounding thermal aureole. Using these P-T estimates, quantitative estimates of a(H2O) are made for pelites at different grades in the aureole.
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Discussion on P-T conditions in the Moines of the Central Highlands, Scotland

Journal of the Geological Society, 1981
DR J. A. W inchester writes: I read with interest the paper by P. R. A. Wells on P-T conditions in the Central Highlands of Scotland. It represents a useful attempt to distinguish the P-T conditions prevailing in that area during the climax of the Caledonian (Grampian) orogeny, a task not formerly attempted.
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Transformation of Arthropod Biopolymers in High P-T Conditions

2013
Modern arthropod cuticles consist of chitin fibres in a protein matrix, but fossil arthropods, particularly those earlier than Tertiary, yield an aliphatic composition. This apparent contradiction is addressed in this chapter. Modern cockroach, scorpion and shrimp cuticle were subjected to artificial heating (maturation) techniques (350 °C/700 Bars/24 ...
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ON SURFACE PROPERTIES OF TANTALUM UNDER DIFFERENT P-T-N-CONDITIONS

TOPICAL PROBLEMS OF DEVELOPMENT RENEWABLE ENERGY, 2020
Исходя из параметров парного межатомного потенциала Ми–Леннард-Джонса, разработан метод расчета удельной поверхностной энергии (), изохорной и изобарной производных  по температуре, и изотермической производной  по давлению. Метод применим как для макро-, так и для нано-кристалла с данным числом атомов и с определенной формой поверхности.
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P–T conditions of Grenville-age eclogite facies metamorphism and amphibolite facies retrogression of the Glenelg–Attadale Inlier, NW Scotland

Geological Magazine, 2005
Peak and retrograde P–T conditions of Grenville-age eclogites from the Glenelg–Attadale Inlier of the northwest Highlands of Scotland are presented. Peak conditions are estimated as c. 20 kbar and 750–780°C, in broad agreement with previous work.
C. Storey, T. Brewer, S. Temperley
semanticscholar   +1 more source