Results 21 to 30 of about 116,871 (355)
Frontiers in Earth Science, 2020 Volcanic rocks and associated dikes have been exposed in Wang Nam Khiao area, Nakhon Ratchasima Province, northeastern Thailand where complex tectonic setting was reported.
Vanachawan Hunyek +2 more
doaj +1 more source
Djerfisherite: Nebular Source of Refractory Potassium [PDF]
Contributions to Mineralogy and Petrology 166: 923-934 (2013), 2023 Djerfisherite is an important carrier of potassium in highly reduced enstatite chondrites, where it occurs in sub-round metal-sulfide nodules. These nodules were once free-floating objects in the protoplanetary nebula. Here, we analyze existing and new data to derive an equation of state (EOS) for djerfisherites of K_{6}(Cu,Fe,Ni)^{B} (Fe,Ni,Cu)^{C}_ ...
arxiv +1 more source
Post-eruptive mobility of lithium in volcanic rocks
Nature Communications, 2018 Lithium, an increasingly economically important element, is also used to trace the cycling of materials through the Earth system. Here the authors show that post-eruptive processes such as degassing and groundmass crystallisation control the inventory of
B. S. Ellis +7 more
doaj +1 more source
Mineral chemistry and geothermobarometry of gabbroic dykes of the Garmab Ophiolite sequence (Northeast of Kamyaran) [PDF]
پترولوژی, 2018 The Garmab ophiolite complex, a part of the Ophiolite-Radiolithic zone of Kermanshah, is located in the northeast of Kamyaran. In view of the Iranian geo-structural zones, this complex is situated between the Sanandaj-Sirjan Zone and the Zagros thrust ...
shahryar Mahmoudi +2 more
doaj +1 more source
LATE-DEVONIAN SAKHARA DUNITE-CLINOPIROXENITE-GABBRO COMPLEX (EAST MAGNITOGORSK ZONE, SOUTH URALS): PETROLOGICAL-MINERALOGICAL FEATURES AND GEODYNAMIC SETTING [PDF]
Минералогия, 2021 The relevance of the work is caused by necessary regional analysis of magmatic evolution of the East Magnitogorsk belt and refinement of ideas on geodynamics of the South Urals.
T.N. Surin
doaj +1 more source
Bringing the Field into the Classroom by Using Dynamic Digital Maps to Engage Undergraduate Students in Petrology Research [PDF]
, 2004 This article describes the use of Dynamic Digital Maps (DDMs) in undergraduate petrology courses. A DDM is a stand-alone computer program that presents interactive geologic maps, digital images, movies, animations, text and data.
Christopher Condit, Theresa Boundy
core +1 more source
Modeling the spatial evolution wildfires using random spread process
Environmetrics, Volume 33, Issue 8, December 2022., 2022 Abstract The study of wildfire spread and the growth of the area burned is an important task in ecological studies and in other contexts. In this work we present a model for fire spread and show the results obtained from simulations of burned areas. The model is based on probabilities of fire at different locations. Such probabilities are obtained from
Carlos Díaz‐Avalos, Pablo Juan
wiley +1 more source
Solving petrological problems through machine learning: the study case of tectonic discrimination using geochemical and isotopic data [PDF]
Contributions to Mineralogy and Petrology - Volume 171, Issue 10,
1 October 2016, Article number 81, 2017 Machine learning methods are evaluated to study the intriguing and debated topic of discrimination among different tectonic environments using geochemical and isotopic data. Volcanic rocks characterized by a whole geochemical signature of major elements (SiO2, TiO2, Al2O3, Fe2O3T, CaO, MgO, Na2O, K2O), selected trace elements (Sr, Ba, Rb, Zr, Nb, La ...
arxiv +1 more source
Frontiers in Earth Science, 2017 The complex process of melting in the Earth's interior is studied by combining a multiphase numerical flow model with the program AlphaMELTS which provides a petrological description based on thermodynamic principles.
Massimiliano Tirone, Jan Sessing
doaj +1 more source
The early Cycladic settlement at Dhaskalio, Keros: preliminary report of the 2008 excavation season [PDF]
, 2009 The 2008 excavations on the small island of Dhaskalio opposite Dhaskalio Kavos on the Cycladic island of Keros are reviewed. An account is given of the survey, recording many walls of the early Bronze Age, and of the excavations, continued from the 2007 ...
Brodie, N. +3 more
core +1 more source