The study of the internal structures placer gold on territory east Siberian platform, overlain by a thick cover Mz-Kz deposits, where traditional methods searching for deposits are not effective, allowed us to determine, first time, stages ore formation and conditions its occurrence. identified indicators (structures primary recrystallization, secondary high-grade shells) indicate that content ...

We provide here information on the distribution of copper, zinc, lead, gold, silver, barium, arsenic, antimony, mercury, selenium and tellurium in the Moore and Monte Negro high-sulfidation epithermal deposits in the Pueblo Viejo district, Dominican Republic. Moore and Monte Negro are funnel-shaped zones of advanced argillic alteration and precious-metal mineralization which extend to depths of...

INTERACTIONS OF BIOTA WITH GOLD – AN INTRODUCTION Gold is widely distributed in the biosphere. Various organisms have displayed the ability to accumulate gold (Korobushkina et al. 1983). Sea urchins, sea stars and crabs have been shown to accumulate gold (Korobushkina et al. 1983). Some land plants have been shown to accumulate gold, such as the thiocyanate containing carrot family (Umbellifera...

    Introduction Epithermal deposits are usually found in association with near-surface magmatic-hydrothermal environments with volcanic rocks. According to studies, their formation depth is less than 1.5 km and the temperature for their formation is less than 300 ° C. Epithermal deposits are usually rich in gold to gold-silver and rich in silver and include low sulfide, medium sulfide and hig...