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Blobrana


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Mining ancient ores for clues to early life

An analysis of sulfide ore deposits from one of the world's richest base-metal mines confirms that oxygen levels were extremely low on Earth 2.7 billion years ago, but also shows that microbes were actively feeding on sulfate in the ocean and influencing seawater chemistry during that geological time period.
The research, reported by a team of Canadian and U.S. scientists in Nature Geoscience, provides new insight into how ancient metal-ore deposits can be used to better understand the chemistry of the ancient oceans - and the early evolution of life.
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Blobrana


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Geologists have discovered an iron ore deposit estimated to be at least 1 billion tons in northeast China's Liaoning Province after more than two years of exploration, local authorities said on Thursday.
The newly-found deposit, between 1,280 meters and 1,500 meters underground, is at the Pingshan District, Benxi City, said Wang Wenqing, deputy head of the Liaoning Provincial Survey Academy of Geology and Mineral Resources.
Initial exploration show that the iron ore is mainly hematite or magnetite, and the average iron content is 34.68 percent.

Source Xinhua

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