sulfidic

Suitable technique for the processing of low-grade sulfidic and oxidic copper ores with relatively low investment costs.

16.1 Roasting oven, calcining furnace 1993

Dominated by dissolved hydrogen sulfide, the sulfidic wedge was in a state of flux, varying in size and capable of encroaching on previously oxygenated areas of the continental shelf - killing all animal life there.

PhysOrg.com - latest science and technology news stories 2010

But the researchers 'results show that under specific geochemical conditions in the early ocean, when levels of dissolved sulfate (the source of hydrogen sulfide in the ocean) and oxygen were particularly low compared to the modern ocean, layers of sulfidic waters could coexist with ferruginous water masses, and even persist for long periods of time.

PhysOrg.com - latest science and technology news stories 2010

Dominated by dissolved hydrogen sulfide, the sulfidic wedge was in a state of flux, varying in size and capable of encroaching on previously oxygenated areas of the continental shelf - killing all animal life there.

PhysOrg.com - latest science and technology news stories 2010

Further, sandwiched in this deep ocean was a dynamic wedge of sulfidic water, highly toxic to animal life, that impinged against the continental shelf.

PhysOrg.com - latest science and technology news stories 2010

But the researchers 'results show that under specific geochemical conditions in the early ocean, when levels of dissolved sulfate (the source of hydrogen sulfide in the ocean) and oxygen were particularly low compared to the modern ocean, layers of sulfidic waters could coexist with ferruginous water masses, and even persist for long periods of time.

PhysOrg.com - latest science and technology news stories 2010

Purple and green bacterial mats in a Mammoth Hot Springs sulfidic pool.

Livescience.com 2010

The overall picture is a marine basin with co-existing oxygen-rich, sulfidic and ferruginous water layers.

PhysOrg.com - latest science and technology news stories 2010

Records showed that on March 24, 1996 the worst environmental disaster occurred in Marinduque when the plug of Marcopper-Placer Dome's s drainage tunnel failed, resulting in the release of some 1.5 to 3 million cubic meters of sulfidic tailing slurry into the Makulapnit and Boac Rivers and Marinduque's western ocean.

Latest News aaron salido 2010

We show that the sulfidic ocean wedge, along with an absence of oxygen, can hinder the colonization of early animals on the shallow seafloor and influence their evolution as they take a foothold.

PhysOrg.com - latest science and technology news stories 2010