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Afghanistan minerals fully mapped
The US Geological Survey released the results of a "hyperspectral imaging" effort, in which reflections of light shone from an aircraft are analysed.
Different minerals - as well as snow or vegetation - reflect specific colours, resulting in a "mineral map".
The map comprises more than 800 million data points corresponding to an area of 440,000 sq km, some 70% of the country.
Afghanistan is known to have vast reserves of oil, gas, copper, cobalt, gold and lithium. In late 2011, a consortium of Indian companies inked a deal to begin mining some of the country's large stores of iron.
But the country is known to have a wider array of mineral resources; in 2010, the Afghan ministry of mines claimed a value of its reserves of nearly a trillion dollars, then carrying out tours to promote investment in them.
But it remains to pin down which economically viable minerals are where, an effort for which the USGS's hyperspectral imaging expertise was enlisted.
In a series of 28 flights over 43 days, the USGS gathered the data by shining visible and infrared light from a height of 15,000m and using a camera to capture the reflections. Each "pixel" of the camera was analysed and correlated with the materials that reflect at a given colour.
The USGS public release of the data includes two maps: one of iron and iron-bearing minerals, and one of minerals principally containing carbon, silicon, or sulphur.
Afghanistan has reportedly some $1 Trillion in fossil and mineral resources!
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