Results 11 to 20 of about 28,608 (299)

Large Igneous Province Record Through Time and Implications for Secular Environmental Changes and Geological Time‐Scale Boundaries

open access: yesGeophysical Monograph Series, Page 1-26., 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.
Richard E. Ernst   +8 more
wiley  

+23 more sources

Petrology of metamorphic rocks [PDF]

open access: greenGeochimica et Cosmochimica Acta, 1984
Roger M. Mason
openalex   +3 more sources

Petrology and Tectonic Geophysics of Massive and Foliated Eclogites in the North Qilian Orogenic Belt: Changes in Mineral Composition, Oxygen Fugacity, and Fabric during Exhumation

open access: yesAdsorption Science & Technology, 2022
The North Qilian orogenic belt is a typical area of “cold” subduction of the early Paleozoic oceanic plate, forming a series of high pressure and low temperature metamorphic rock assemblages. Among them, eclogite is a kind of protolith, which is basaltic
Feng Wang, Daorong Zhou, Xunhua Zhang
doaj   +1 more source

A Log‐Ratio‐Based Algorithm for Petrologic Mass‐Balance Problems and Uncertainty Assessment

open access: yesGeochemistry, Geophysics, Geosystems, 2023
We provide a new algorithm for mass‐balance calculations in petrology and geochemistry based on the log‐ratio approach championed initially by John Aitchison (e.g., Aitchison, 1982, https://doi.org/10.1111/j.2517-6161.1982.tb01195.x; Aitchison, 1984 ...
Kelsey Prissel   +2 more
doaj   +1 more source

ACCESSORY GOLD-SILVER MINERALIZATION FROM CHROMITITES OF KHARCHERUZ ULTRAMAFIC MASSIF (THE POLAR URALS)

open access: yesИзвестия Томского политехнического университета: Инжиниринг георесурсов, 2021
The relevance of the work is caused by weakly elaboration of mineralogical aspects of ultramafic restitic massifs, which does not allow their generalization at mineralogical level and restoration of complete history of their formation and transformation,
Alexey N. Yurichev
doaj   +1 more source

Theoretical petrology [PDF]

open access: yes, 1979
The central issues in petrology have remained remarkably unchanged in the last 50 years. In igneous petrology, the focus is on understanding the nature and cause of diversity in igneous rocks: on identifying primary magma types and constraints on the ...
Stolper, Edward
core   +1 more source

THE 60TH JUBILEE OF EVGENY V. SKLYAROV, CORRESPONDING MEMBER OF THE RUSSIAN ACADEMY OF SCIENCES

open access: yesГеодинамика и тектонофизика, 2015
The article is devoted to the 60th Jubilee of Evgeny V. Sklyarov, a recognized expert in a wide variety of igneous and metamorphic processes and geodynamics.
D. P. Gladkochub, R. P. Dorofeeva
doaj   +1 more source

Defects in olivine [PDF]

open access: yesEuropean Journal of Mineralogy, 2021
Olivine, a ferromagnesian orthosilicate, is the most abundant mineral in Earth's upper mantle and is stable down to the olivine–wadsleyite phase transition, which defines the 410 km depth mantle transition zone.
S. Demouchy
doaj   +1 more source

Zircon ages in granulite facies rocks: decoupling from geochemistry above 850 °C? [PDF]

open access: yes, 2018
Granulite facies rocks frequently show a large spread in their zircon ages, the interpretation of which raises questions: Has the isotopic system been disturbed? By what process(es) and conditions did the alteration occur?
A Boriani   +120 more
core   +1 more source

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