Tourmaline-bearing quartz veins and replacement deposits, commonly copperand gold-bearing, are found in unusual concentration in northwestern Nevada and adjacent northeastern California in Triassic and Jurassic arc rocks and in the Cretaceous plutons that intrude them. Mines and prospects that exploit the tourmaline-bearing deposits are found in a zone approximately 70 miles long and 50 miles w...

Abstract New U–Pb age and Hf isotope data obtained on detrital zircon grains from Au- U-bearing Archaean quartz-pebble conglomerates in the Singhbhum Craton, eastern India, specifically Upper Iron Ore Group Badampahar Greenstone Belt Phuljhari Formation below Dhanjori provide insights into provenance maximum of sediment deposition. The most concordant, least disturbed 207 Pb/ 206 Pb ages cover ...

Gold particles are modified with surface-attached bis(beta-cyclodextrin)s bearing S-S bridges to give water-soluble cyclodextrin-modified gold nanoparticles, which are successfully used as recycling extractors for [60]fullerene.

The distribution of DR3 and of extended haplotypes bearing DR3 was studied in three groups of subjects: 35 patients with rheumatoid arthritis (RA) with gold induced thrombocytopenia or proteinuria, 185 patients with RA without these side effects, and 300 normal healthy controls. The extended haplotypes bearing DR3 were analysed with cDNA probes for DR alpha, DR beta, DQ alpha, and DQ beta genes...

Focusing on economic distress episodes in an industry, we estimate the effect of conglomeration on resource allocation. Distressed segments have higher sales growth, higher cash flow, and higher expenditure on research and development than single-segment firms. This is especially true for segments with high past performance, for unrated firms, and in competitive industries. Single-segment firms...

Onzon-Kanbani area is a western flank of Mogok Metamorphic Belt where gold mineralization is hosted as auriferous quartz-vein with epithermal low-sulphidation characters. Mineralization is closely associated with NE-SW trending fracture or shear zone probably related to the dextral movement of the Sagaing Fault system. Mineralization related hydrothermal alteration is developed as narrow zones ...

The unique minerals of the Au-Pd-Hg system in gold grains from heavy concentrates Itchayvayam placers and watercourses draining ore samples Barany outcrop at mafic–ultramafic complex (Kamchatka, Russia) were investigated. Gold contain substitution structures formed by Pd,Hg-rich low-fineness (Au0.59–0.52Pd0.24–0.25Hg0.17–0.23, 580‰–660‰) Pd,Hg-poor high-fineness (Au0.94–0.90Pd0.02–0.04Hg0.03, 9...