Sentences with phrase «known ore deposits»
The weights are derived by training on known ore deposits of certain classes like porphyry copper.
https://climateaudit.org/
Researchers previously suspected the copper came from known ore deposits 100 kilometers or less from the site of the Iceman's demise.
Not exact matches
«So far, we only know the surface of the ore deposits at hydrothermal vents.
The microbes metabolize iron and grow at rates high enough to indicate their ancient equivalents were capable of depositing some of the world's largest sedimentary iron ore deposits, known as banded iron formations.
The oldest known iron ores were deposited in the Precambrian period and are up to four billion years old (the Earth itself is estimated to be about 4.6 billion years old).
Known recoverable uranium resources in unmined ore deposits by country as of 2004 are shown in Table 1.