Results 71 to 80 of about 60,917 (227)
Sedimentology, EarlyView.ABSTRACT One of the largest wetlands on Earth, the Brazilian Pantanal contains roughly 10 000 natural lakes, about 1000 of which are hypersaline. In these environmentally stressful settings, animal life struggles to survive, while cyanobacteria form extensive mats.
Lucas V. Warren +5 more
wiley +1 more source
Sedimentology, EarlyView.ABSTRACT Microbial mats and microbialites are common in modern and ancient saline lacustrine environments and are highly responsive to biological and environmental factors. As such, they represent important sources of high‐resolution environmental data across a wide range of geological time. Nonetheless, interpretation of fossil mats is non‐trivial due
Connor Doyle +6 more
wiley +1 more source
CHARACTERISTICS OF THE UNIQUE Y-HREE-F-RICH PEGMATITE SYSTEM REVEALED BY ZIRCON GEOCHEMISTRY: A CASE STUDY FROM MT. PLOSKAYA AMAZONITE DEPOSIT, KOLA PENINSULA [PDF]
МинералогияAn amazonite-quartz-albite pegmatite body of the Mt. Ploskaya intrudes a metavolcanic complex of the Keivy Terrane (Kola Peninsula) and is unique in its diversity and an assemblage of ore and accessory Y-Yb-Ta-Nb-Be-Pb-F mineralization.
D.R. Zozulya +3 more
doaj +1 more source
Записки Горного институтаMigmatized gneisses of the Chupa paragneiss Formation in the Belomorian Mobile Belt (BMB) of the Fennoscandian Shield have been studied, and the conditions of partial melting during high-grade metamorphism of the rocks were determined.
Anastasiya V. Yurchenko +2 more
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Записки Горного института, 2017 Results of isotope-geochemical studies by PbLS step-leaching method of cassiterite from greisens located in Logrosán granite massif (Central Iberian Zone, Spain) and apatite from hydrothermal quartz-apatite vein on its exocontact indicate that in both ...
N. G. Rizvanova +2 more
doaj +1 more source
Chemical composition of sandstones and paleogeodynamic reconstructions
Литосфера, 2016 The article analyzes the adequacy of compliance on paleogeodynamic nature of Upper Precambrian sedimentary associations - Bashkir meganticlinorium, Kama-Belaya aulacogene and Uchur-Maya region, received by geological methods and by using discriminant ...
A. V. Maslov +3 more
doaj +2 more sources
Russian Journal of Earth SciencesFor the first time, a study was carried out on the geochemistry of zircon (SIMS method, 2 samples, 20 points) from leucogranites of the Laghman complex, located in the pegmatite-bearing (LCT-type) province of Nuristan (Afghanistan).
Levashova Ekaterina Valer'evna +4 more
doaj +1 more source
DISTRIBUTION OF TRACE ELEMENTS IN GROWTH ZONES AND SECTORS OF SPODUMENE CRYSTALS (PASHKI DEPOSIT, NURISTAN, AFGHANISTAN) [PDF]
МинералогияRegular distribution of several trace elements in spodumene crystals of the Pashki pegmatite Li deposits in Afghanistan (Nuristan province) is analyzed using secondary ion mass spectrometry (SIMS).
M.A. Ivanov +3 more
doaj +1 more source
The identification and biogeochemical interpretation of fossil magnetotactic bacteria [PDF]
, 2008 Magnetotactic bacteria, which most commonly live within the oxic-anoxic transition zone (OATZ) of aquatic environments, produce intracellular crystals of magnetic minerals, specifically magnetite or greigite.
Kirschvink, Joseph L., Kopp, Robert E.
core +1 more source
Petrography of El Baúl massifgranitoids, Cojedes state, Venezuela
Revista Técnica de la Facultad de Ingeniería, 2015 The granites El Mogote, Mata Oscura and Piñero outcrop in the El Baúl massif, next to metasedimentary, volcanic and   sub volcanic rocks, to the south of Cojedes state, Venezuela.
Patxo Viscarret, Franco Urbani
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