Abstract The ages of Zn-Pb deposits are exceptionally challenging to determine owing the lack suitable mineral chronometers and techniques. Here we present first result for in situ LA-ICP-MS U-Pb dating carbonates barite from a Mississippi Valley– type (MVT) deposit South China. Hydrothermal dolomite close textural paragenetic association with sulfides, calcite cement breccia ores, yield 473.4 ...

[1] Difficulties associated with reconstructing past changes in export production were highlighted recently by Averyt and Paytan (2004), who reported substantial disagreement among records developed using different paleoproductivity proxies extracted from two equatorial Pacific piston cores. Proxies included the accumulation rates of barite, excess Ba, and excess Al, as well as elemental ratios...

Abstract In this study, polymer/glass fiber fabric‐based nanocomposite plates were fabricated with 0.01%–0.1% single‐walled carbon nanotubes (SWCNTs) and filler materials (barite, magnetite, colemanite) using a hand layup process. Mechanical properties (e.g., tensile strength, flexural Charpy impact strength), thermal conductivity, radiation shielding gamma neutron radiation) of the specimens d...

In this research, a mineral barite powder was reduced by carbon monoxide gas and the effects of reduction time and temperature was investigated as well as barite particle size. Results showed that the best result would be feasible when the barite particle sizes are between (-70 +100) in mesh scale. The barite reduction could reach the maximum level (98%) after reduction by carbon monoxide at 85...

kuh- e -zar gold deposit located 35 km west of torbat-e-heydaryeh, (khorassan e- razavi province), east of iran. this deposit is a specularite-rich iron oxide type (iocg). this mine is situated within khaf-bardascan volcanic plutonic belt. based on recent exploration along this belt, several iocg type system plus kuh-e-zar deposit are discovered. in the study area, several type of tuff and lava...