Results 141 to 150 of about 197,145 (380)
The Depositional Record, EarlyView.Two non‐seismically generated sedimentary volcanoes were excavated on the Colorado River delta in Lake Powell, Utah, USA, in order to characterise the internal structures. Sedimentary volcanoes are commonly employed as tools in palaeoseismic reconstruction, thus it is important to establish criteria to differentiate non‐seismic‐generated sedimentary ...
Michael C. Wizevich +6 more
wiley +1 more source
MICROTOPOCHEMISTRY AND GEOCHEMICAL FEATURES OF A PYRITE NODULE OF СARBONACEOUS SILTSTONES OF THE SAF′YANOVKA MASSIVE SULFIDE DEPOSIT (CENTRAL URAL) [PDF]
Минералогия, 2017 Pyrite nodules of carbonaceous siltstones of the Saf´yanovka nonmetamorphosed massive sulfide deposit consist of a porous poikilitic pyrite core (zone A), which is partly transformed to metacrystalline pyrite aggregates at the periphery (zones В и С ...
N.P. Safina +3 more
doaj
The Depositional Record, EarlyView.While the Smithian–Spathian boundary carbon isotopic excursion has been traditionally interpreted as capturing global carbon cycle behaviour, recent studies have suggested that at least some Early Triassic carbon isotopic excursions may incorporate influences from authigenic or early diagenetic processes.
Jordan P. Todes +6 more
wiley +1 more source
TRACE ELEMENTS IN ZONAL OLIVINE OF BRONZE AGE METALLURGICAL SLAGS, SOUTH URALS [PDF]
Минералогия, 2018 Metallurgical artifacts including Cu-bearing slag fragments were found in the Bronze Age settlements of the South Urals. The slags from settlements of the Sintashta culture (Kamenny Ambar, Ustye and Sarym-Sakly) are mainly composed of olivine, magnetite ...
M.N. Ankushev +2 more
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The Depositional Record, EarlyView.The Newark Basin has seen renewed interest recently as a potential location for carbon sequestration. This study uses a recently exposed outcrop to investigate the reasons behind varying lithologies and post‐depositional soft‐sediment deformation in the fluvial sandstones of the Stockton Formation. Using field observations and sediment geochemistry, we
Jane L. Alexander +3 more
wiley +1 more source
EXPERIMENTAL MELTING AND CRYSTALLIZATION OF ANDESITE OF BEZYMYANNY VOLCANO, KAMCHATKA [PDF]
Минералогия, 2017 Results of melting and crystallization of andesite from Bezymyanny volcano in Kamchatka at temperature of 1200–1300 °С and normal pressure are given. It is found that the structure of crystallization products of an andesite melt is distinct from natural ...
L.Y. Kabanova +2 more
doaj
Mineralogy of alluvial sediments of Avzyan gold region (the Southern Urals)
Литосфера, 2018 The Avzyan gold region is located within the Bashkirian anticlinorium and includes lode gold deposits and placers. The Gorny Priisk, Bogryashka and Ulyuk-Bar gold deposits are hosted in the Riphean metamorphosed carbonaceous sequence.
Ekaterina E. Palenova +4 more
doaj +1 more source
Environmental Mineralogy [PDF]
, 2000 Abstract The writing and production of this volume recognize its potential role as a textbook for courses in “Environmental Mineralogy”, a field that calls on both core mineralogical skills and interdisciplinary understanding across chemical, biological and geological fields.
Vaughan, David, Wogelius, R. A.
openaire +1 more source
Interglacial dust, ocean fertilisation and Neoproterozoic earth oxygenation
The Depositional Record, EarlyView.Mineral dust is an integral part of modern ocean nutrient supply. It is originated mainly in deserts and by glacial processes. Given the global scale of the Neoproterozoic glaciations, we suggest that mineral dust formed during snowball events were blown to oceans, sustaining life, promoting CO2 sequestration and contributing to the oxygenation of ...
Leandro G. DaSilva +2 more
wiley +1 more source