Results 51 to 60 of about 705,880 (306)
MINERALOGY OF GOLD AND SILVER OF GOSSANS OF THE ALEXANDRINSKOE DEPOSIT (SOUTH URALS) [PDF]
Минералогия, 2017 The precious metal minerals were found in gossans of the Alexandrinskoe deposit: native gold with 4.64–9.39 wt. % Cu, Cu-bearing mercurian electrum, members of the bromargyrite-chlorargyrite series and iodargyrite.
I.A. Blinov +2 more
doaj
Литосфера, 2017 In the paper, there are adduced the data of a thermobarogeochemistry investigation of fluid inclusions in apatite of magnetite-chlorite-carbonates rocks from ultrabasite Karabash massife.
Valerii V. Murzin, Svetlana N. Shanina
doaj +1 more source
Geological and structural position of the Svetlinsky gold deposit (Southern Urals)
Записки Горного института, 2022 The paper presents the geological and structural position of the large Svetlinsky gold deposit in the Kochkar anticline (Southern Urals), localized in the zone of the Late Paleozoic (D3) deep thrust of the western dip.
Alexander Yu. Kissin +2 more
doaj +1 more source
A geochemical study of the Ashanti gold deposit at Obuasi, Ghana [PDF]
, 1995 The Ashanti gold deposit at Obuasi occurs in the Early Proterozoic Birimian formation. The orebodies consist of gold-sulphides disseminated in metasediments and metavolcanics, and gold-bearing quartz veins. Gold occurs mainly as native gold normally with
Kase, Katsuo +2 more
core +1 more source
Rethinking plastic waste: innovations in enzymatic breakdown of oil‐based polyesters and bioplastics
FEBS Open Bio, EarlyView.Plastic pollution remains a critical environmental challenge, and current mechanical and chemical recycling methods are insufficient to achieve a fully circular economy. This review highlights recent breakthroughs in the enzymatic depolymerization of both oil‐derived polyesters and bioplastics, including high‐throughput protein engineering, de novo ...
Elena Rosini +2 more
wiley +1 more source
Frontiers in Earth Science, 2023 Introduction: The Saibagou gold deposit, located in the eastern part of the tectonic belt of the northern Qaidam Basin in western China, has its gold ore bodies strictly controlled by the regional fault system.
Jia Xing +7 more
doaj +1 more source
Native gold from the Plavica epithermal deposit, Republic of Macedonia [PDF]
Doklady Earth Sciences, 2013 Mineralogical-geochemical studies have shown that gold from the Plavica high sulfidation epithermal deposit (Republic of Macedonia) contains an admixture of Fe and Cu, that the morphology of gold indicates the proximity of the primary source, and that the chemical composition of gold is independent of its morphology.
Stefanova, Violeta +3 more
openaire +2 more sources
Native gold in the weathering crust of the Nizhneselemdzhinsky gold-bearing node (Amur region)
LITHOSPHERE (Russia), 2021 Research subject. The weathering crust of Proterozoic slates in the Neklya River basin and Paleozoic granites in the Nizh- neselemdzhinsky gold-bearing node (NGBN) in the Tatarka River basin.Methods. The research was carried out using the methods of atomic absorption, X-ray fluorescent and mineralogical analysis of rocks and minerals.
I. V. Kuznetsova, P. P. Safronov
openaire +2 more sources
Assessing the Prosody of Non-Native Speakers of English: Measures and Feature Sets [PDF]
, 2016 In this paper, we describe a new database with audio recordings of non-native (L2) speakers of English, and the perceptual evaluation experiment conducted with native English speakers for assessing the prosody of each recording.
Batliner, A +6 more
core
, 2018 Late gadolinium enhancement (LGE) imaging is the currently the gold standard for in-vivo detection of myocardial infarction. However, gadolinium contrast administration is contraindicated in patients with renal insufficiency.
Arai, AE +11 more
core +1 more source