Abstract Alkaline magmatic systems formed in intraplate settings have a low Au endowment, contrasting with the high fertility of alkaline arc and rift settings, which host numerous Au-rich porphyries Cu-Au Au-Ag epithermal deposits. Among other factors, system is determined by concentration ore-forming magma, strongly controlled amount chemistry sulfides that fractionated during magma different...

Porphyry Cu–Au deposits are the major global source of copper, an essential metal for green transition, and a significant gold. They occur both in thick continental thin oceanic arcs at depths between ∼1 ∼6 km above parental magma chambers situated ∼5–15 depth. Although it is believed that precipitation processes these same arcs, not clear why porphyry two environments display different Cu Au e...

Side scan sonar in low-cost 'fishfinder' systems has become popular in aquatic ecology and sedimentology for imaging submerged riverbed sediment at coverages and resolutions sufficient to relate bed texture to grain-size. Traditional methods to map bed texture (i.e. physical samples) are relatively high-cost and low spatial coverage compared to sonar, which can continuously image several kilome...

<p>Geologically, the Lake Matano area is an of laterite deposits, where in these deposits there are heavy metal geochemical elements that can have a negative impact on environment. This research was conducted three rivers surround and empties into Matano, with aim analyzing behavior metals soil. The method used includes literature study observing results previous studies testing content A...

Trace element compositions of sphalerite and chalcopyrite have been investigated for four arc-hosted Cretaceous VMS deposits (María Teresa, Perubar, Palma in Peru, Cerro de Maimón the Dominican Republic) using laser ablation inductively-coupled plasma mass spectrometry. In sphalerite, Fe, Mn, Cd, Hg, Ag, Sb, Se, In, Ge, Ga are lattice-bound, whereas Sn, Tl, Bi, Pb occur at least partly as miner...

"Denotes other ttian senior author. ACHARYA, HEMENDRA K., Stone & Webster Engineering Corp., Boston, Massachusetts Geothermal Fields and Plate Tectonics in Circum-Pacific Area A number of geothermal fields explored so far in the CircumPacific area occur along spreading ridges and subduction zones in areas of young tectonism and volcanism. A preliminary analysis by pattern recognition techniques...

The Atacama Desert, northern Chile, is one of the driest deserts on Earth and, as such, a natural laboratory to explore the limits of life and the strategies evolved by microorganisms to adapt to extreme environments. Here we report the exceptional adaptation strategies of chlorophototrophic and eukaryotic algae, and chlorophototrophic and prokaryotic cyanobacteria to the hyperarid and extremel...

The Weilasituo-bairendaba district is located at the eastern end of Central Asian Orogenic Belt, which an important component Cu-Pb-Zn polymetallic metallogenic belt on Western slope Greater Xing’an Range in Inner Mongolia, China. known Cu-Zn deposits such as Weilasituo deposit and Bairendaba Ag-Pb-Zn are same tectonic-magmatic product. district’s structure framework consists NE-trending region...