Results 21 to 30 of about 1,977 (227)

The Lyavaraka Ultrabasic Complex, Serpentinite Belt, Kola Peninsula, Russia

open access: yesGeosciences, 2022
The Paleoproterozoic Lyavaraka ultrabasic complex is one of several dunite–harzburgite–orthopyroxenite bodies exposed as shallow plutonic complexes in the Serpentinite Belt, Kola Peninsula, Russia. Lyavaraka and the other complexes are anorogenic, formed
Andrei Y. Barkov   +3 more
doaj   +1 more source

Intermediate Infrared Spectroscopy of Pyroxene: Determination of Ca‐Mg‐Fe Composition in the 4–8 Micron Wavelength Range

open access: yesEarth and Space Science, 2023
Although pyroxene has been detected remotely across the Solar System, limited information is available from infrared remote sensing about the Mg‐Fe composition of pyroxene, and distinguishing between augite (20 < CaSiO3 < 45) and diopside‐hedenbergite ...
Christopher H. Kremer   +2 more
doaj   +1 more source

Temperature-induced oligomerization of polycyclic aromatic hydrocarbons at ambient and high pressures

open access: yesScientific Reports, 2017
Temperature-induced oligomerization of polycyclic aromatic hydrocarbons (PAHs) was found at 500–773 K and ambient and high (3.5 GPa) pressures. The most intensive oligomerization at 1 bar and 3.5 GPa occurs at 740–823 K.
Artem D. Chanyshev   +4 more
doaj   +1 more source

Interpreting high-temperature magnetic susceptibility data of natural systems

open access: yesFrontiers in Earth Science, 2023
High-temperature susceptibility (HT-χ) data are routinely measured in Earth, planetary, and environmental sciences to rapidly identify the magnetic mineralogy of natural systems. The interpretation of such data can be complicated.
Adrian R. Muxworthy   +6 more
doaj   +1 more source

Platinum Group Element Traces of CAMP Volcanism Associated With Low‐Latitude Environmental and Biological Disruptions

open access: yesGeophysical Monograph Series, Page 263-304., 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.
Jessica H. Whiteside   +3 more
wiley  

+7 more sources

Mineralogical and Raman spectroscopy studies of natural olivines exposed to different planetary environments [PDF]

open access: yesPlanetary and Space Science, 2014
Abstract New lander missions to bodies of our solar system are coming up and thus new techniques are desirable for the in-situ investigation of planetary surface and near surface materials. During the last decade Raman spectroscopy has been developed to become an excellent laboratory tool for fast petrological and mineralogical investigation of ...
Weber, I.   +4 more
openaire   +1 more source

Thermobarometry of diamond inclusions: Mantle structure and evolution beneath Archean cratons and mobile belts worldwide

open access: yesGeosystems and Geoenvironment, 2023
Thermobarometric calculations for mineral inclusions in diamonds provide a systematic comparison of P-T-fO2 conditions for different cratons and mobile belts worldwide, using a database of 4440 mineral EPMA analyses.
Igor Ashchepkov   +3 more
doaj   +1 more source

Micromechanical testing and property upscaling of planetary rocks: A critical review

open access: yesInternational Journal of Mining Science and Technology
Knowledge of the mechanical behavior of planetary rocks is indispensable for space explorations. The scarcity of pristine samples and the irregular shapes of planetary meteorites make it difficult to obtain representative samples for conventional ...
Yiwei Liu   +3 more
doaj   +1 more source

Picroilmenites in Yakutian kimberlites: variations and genetic models [PDF]

open access: yesSolid Earth, 2014
Major and trace element variations in picroilmenites from Late Devonian kimberlite pipes in Siberia reveal similarities within the region in general, but show individual features for ilmenites from different fields and pipes.
I. V. Ashchepkov   +11 more
doaj   +1 more source

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