Results 81 to 90 of about 37,548 (250)
Solid Earth Sciences, 2020 The Cishan gold deposit is a newly discovered medium-scale independent skarn gold deposit located in the Tongling ore cluster area of the Middle-Lower Yangtze Metallogenic Belt, and the ore-related intrusion is the Cishan pyroxene diorite. In this study,
Shasha Liu +5 more
doaj +1 more source
Sedimentology, EarlyView.ABSTRACT Understanding the biotic and abiotic influences on the deposition and diagenesis of recent microbial carbonates is crucial for addressing the environmental and ecological significance of ancient organosedimentary structures. This study investigates these factors and their expression in the microstructure of Holocene tufa thrombolites from a ...
Paulo Quezada +10 more
wiley +1 more source
Phase transitions in spin-orbital coupled model for pyroxene titanium oxides
, 2004 We study the competing phases and the phase transition phenomena in an effective spin-orbital coupled model derived for pyroxene titanium oxides ATiSi2O6 (A=Na, Li).
Betsuyaku H. +9 more
core +1 more source
Glass in the submarine section of the HSDP2 drill core, Hilo, Hawaii [PDF]
, 2004 The Hawaii Scientific Drilling Project recovered ~3 km of basalt by coring into the flank of Mauna Kea volcano at Hilo, Hawaii. Rocks recovered from deeper than ~1 km were deposited below sea level and contain considerable fresh glass. We report electron
Baker, Michael +4 more
core +1 more source
The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)
Sedimentology, EarlyView.ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti +5 more
wiley +1 more source
Thermochemistry of jadeite—diopside pyroxenes
Geochimica et Cosmochimica Acta, 1980 Abstract The enthalpies of solution of seven synthetic clinopyroxenes on the join CaMg2Si2O6 (diopside)-NaAlSi2O6 (jadeite), of two natural low-Fe ordered omphacites near the 1:1 composition, and of a nearly pure natural jadeite, were measured in molten Pb2B2O5 at 970 K.
Wood, B +3 more
openaire +1 more source
Al-Mg systematics of hibonite-bearing Ca,Al-rich inclusions from Ningqiang [PDF]
, 2011 Hibonite-bearing Ca,Al-rich inclusions (CAIs) usually occur in CM and CH chondrites and possess petrographic and isotopic characteristics distinctive from other typical CAIs.
Guan, Yunbin, Hsu, Weibiao, Wang, Ying
core
Low delta-V near-Earth asteroids: A survey of suitable targets for space missions
, 2014 In the last decades Near-Earth Objects (NEOs) have become very important targets to study, since they can give us clues to the formation, evolution and composition of the Solar System.
Barucci, M. A. +9 more
core +2 more sources
The structure and petrology of the Cnoc nan Cuilean Intrusion, Loch Loyal Syenite Complex, NW Scotland [PDF]
, 2013 In NW Scotland, several alkaline intrusive complexes of Silurian age intrude the Caledonian orogenic front. The most northerly is the Loch Loyal Syenite Complex, which is divided into three separate intrusions (Ben Loyal, Beinn Stumanadh and Cnoc nan ...
Goodenough, Kathryn M. +5 more
core +3 more sources
Trace element composition of silicate minerals from Kunashak Meteorite (L6)
Записки Горного институтаMajor (EPMA) and trace (SIMS) element geochemistry in the silicate minerals (olivine, pyroxene and plagioclase) of Kunashak equilibrated ordinary chondrite (L6) is described. No variations in the major element concentrations of the silicate minerals have
Kristina G. Sukhanova, Olga L. Galankina
doaj