Results 51 to 60 of about 112,509 (371)

Research of vitrinite and fusinite coals for predicting geological hazards in coal seams

open access: yesМінеральні ресурси України, 2020
To establish the necessity of dividing fossil coals into vitrinitic and fusinitic varieties in order to identify the hazardous properties of coal seams during mining. Methodology.
М. I. Antoshchenko   +3 more
doaj   +1 more source

Experimental study and weighting analysis of factors influencing gas desorption

open access: yesFrontiers in Earth Science, 2023
Gas is one of the necessary contributing factors for coal and gas outburst accidents, and the gas desorbed in coal is the energy carrier in the outburst process.
Xin He   +6 more
doaj   +1 more source

A matter of time: The importance of the duration of UHT metamorphism

open access: yes, 2016
The duration of granulite (G) and ultra – high temperature (UHT) conditions in regional metamorphism is critical to arguments regarding the tectonic settings of granulites and their relationships to Supercontinent assembly.
S. Harley
semanticscholar   +1 more source

On the significance of short-duration regional metamorphism

open access: yesJournal of the Geological Society, 2016
Short-duration regional metamorphism is a recently observed and poorly understood phenomenon in metamorphic geology. In this review, it is defined as metamorphism on time scales that limit length scales (of the associated thermal anomaly) to ...
D. Viete, G. Lister
semanticscholar   +1 more source

U-Pn geochronology of deformed metagranites in central Sutherland, Scotland: evidence for widespread late Silurian metamorphism and ductile deformation of the Moine Supergroup during the Caledonian orogeny [PDF]

open access: yes, 2003
Within the Caledonides of central Sutherland, Scotland, the Neoproterozoic metasedimentary rocks of the Moine Supergroup record NW-directed D2 ductile thrusting and nappe assembly, accompanied by widespread tight-to-isoclinal folding and amphibolite ...
Friend, C.R.L.   +5 more
core   +1 more source

Metamorphic Testing for Cybersecurity [PDF]

open access: yesComputer, 2016
Testing is a major approach for the detection of software defects, including vulnerabilities in security features. This article introduces metamorphic testing (MT), a relatively new testing method, and discusses how the new perspective of MT can help to conduct negative testing as well as to alleviate the oracle problem in the testing of security ...
Chen, Tsong Yueh   +6 more
openaire   +5 more sources

Pressure‐Induced sp 2 ‐sp 3 Transitions in Carbon‐Bearing Phases

open access: yesGeophysical Monograph Series, Page 1-9., 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 ...
Sergey S. Lobanov   +1 more
wiley  

+6 more sources

Comparative study on coal rank gradient under different types of metamorphism

open access: yesMeitan kexue jishu
Coal rank gradient is fundamental for predicting the degree of coalification in deep reservoirs. This study, based on the measured maximum reflectance of vitrinite of 85 sets, the maximum reflectance of vitrinite /dry ash-free basis volatile yield of 2 ...
Jielin LU   +4 more
doaj   +1 more source

Matching of images based on their diffeomorphic mapping [PDF]

open access: yesКомпьютерная оптика, 2018
We discuss a problem of comparison of two diffeomorphic images, namely, the source and target images of a diffeomorphism, which are given by two sets of points.
Sergej Lejhter, Sergey Chukanov
doaj   +1 more source

西南日本の熱変成超苦鉄質岩体中のかんらん石と輝石の組成変化に関する覚書 [PDF]

open access: yes, 2010
This short article presents some diagrams showing the compositional variations of primary and metamorphic olivine, orthopyroxene and clinopyroxene in peridotites and serpentinites from thermally metamorphosed ultramafic complexes in SW Japan. In contrast
Nozaka, Toshio
core   +1 more source

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