Minor Elements in Layered Sphalerite as a Record of Fluid Origin, Mixing, and Crystallization in the Navan Zn-Pb Ore Deposit, Ireland

2014 ◽  
Vol 109 (6) ◽  
pp. 1513-1528 ◽  
Author(s):  
D. Gagnevin ◽  
J. F. Menuge ◽  
A. Kronz ◽  
C. Barrie ◽  
A. J. Boyce
Keyword(s):  
Ore Deposit ◽  
Minor Elements

scholarly journals Aluviální zlato v oblasti Dlouhá Ves - Řepová (zábřežské krystalinikum)

2020 ◽  
Vol 28 (1) ◽  
pp. 9-22
Author(s):  
Zdeněk Dolníček ◽  
Miroslav Nepejchal ◽  
Jana Ulmanová
Keyword(s):  
Trace Amount ◽  
Pure Gold ◽  
Crystalline Complex ◽  
Ore Deposit ◽  
Minor Elements ◽  
Metavolcanic Rocks ◽  
Free Gold ◽  
Alluvial Gold ◽  
Small Vein ◽  
Vein Type

A detailed panning prospection of the Řepovský potok, Míroveček and Ospitský potok creeks (northern part of the Zábřeh Upland) proved that trace amount of alluvial gold occurs in the whole studied area. The collected gold sheets are 0.2 to 3 mm in size and mostly have shapes only weakly modified by transport in the stream. Although the chemical composition varies widely between Au-rich silver and pure gold (28.1 - 99.8 at. % Au), individual sheets are typically (few exceptions exist) compositionally homogeneous. Less than half of them has the narrow high-fineness rim, which was formed by leaching of silver in supergene conditions. In lower reach of the Řepovský potok creek there were also found gold sheets containing elevated mercury (0.1 - 5.1 at. %), which most probably originated from neighbouring vein-type Ag-Zn-Pb deposit Řepová. In contrast, the source of Hg-free gold sheets was not unambiguously established. The first possibility includes small vein-type mineralizations similar to the Řepová ore deposit and containing trace amount of gold (an occurrence of this type was newly recognized in the vicinity of Dlouhá Ves village). Second, one cannot exclude the trace occurrence of gold sheets directly in underlying metasiltstones or acid metavolcanic rocks of the Zábřeh Crystalline Complex [with respect to repeatedly observed intergrowths of gold with polymineral aggregates of phyllosilicates (muscovite, chlorite, biotite, clay minerals), feldspars (K-feldspar, albite, K-Na feldspar) and minor quartz in the alluvial gold sheets]. The particles of metallic Cu-Zn-Sn alloys with admixture of Ni, Sb and In, panned from the Řepovský potok creek, could contain metals originated from smelting of polymetallic ores from the deposit Řepová, which comprise the same minor elements.

High Resolution Observations of Ion-Milling Induced Transformation in Synthetic Hollandses

1981 ◽  
Vol 39 ◽  
pp. 114-115 ◽  
Author(s):  
T. J. Headley
Keyword(s):  
High Resolution ◽  
Radioactive Waste Disposal ◽  
Ion Milling ◽  
Minor Elements ◽  
Waste Forms ◽  
Carbon Substrates ◽  
Structural Differences ◽  
Oxide Phases ◽  
Argon Ions ◽  
High Resolution Microscopy

Oxide phases having the hollandite structure have been identified in multiphase ceramic waste forms being developed for radioactive waste disposal. High resolution studies of phases in the waste forms described in Ref. [2] were initiated to examine them for fine scale structural differences compared to natural mineral analogs. Two hollandites were studied: a (Ba,Cs,K)-titan-ate with minor elements in solution that is produced in the waste forms, and a synthesized BaAl2Ti6O16 phase containing ∼ 4.7 wt% Cs2O. Both materials were consolidated by hot pressing at temperatures above 1100°C. Samples for high resolution microscopy were prepared both by ion-milling (7kV argon ions) and by crushing and dispersing the fragments on holey carbon substrates. The high resolution studies were performed in a JEM 200CX/SEG operating at 200kV.

Equivalent uranium and selected minor elements in magnetic concentrates from the Candle Quadrangle, Solomon Quadrangle, and elsewhere in Alaska

1980 ◽  
Author(s):  
Kuo-Liang Pan ◽  
W.C. Overstreet ◽  
Keith Robinson ◽  
A.E. Hubert ◽  
G.L. Crenshaw
Keyword(s):  
Minor Elements

INCO ALLOY G-3

Alloy Digest ◽  
1986 ◽  
Vol 35 (10) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Stress Corrosion ◽  
Stress Corrosion Cracking ◽  
Heat Affected Zone ◽  
Iron Alloy ◽  
Heat Treating ◽  
Minor Elements ◽  
Nickel Chromium ◽  
Inco Alloy

Abstract INCO Alloy G-3 is a nickel-chromium-iron alloy with additions of molybdenum and copper. Some of the minor elements are controlled to provide increased resistance to weld heat-affected zone corrosion. The alloy has exceptional stress-corrosion cracking resistance in chloride-containing environments. This datasheet provides information on composition, physical properties, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: Ni-341. Producer or source: lnco Alloys International.

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