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Caption: Copper-bearing vein (about 1cm maximum thickness) cross-cutting earlier quartz veins at El Teniente deposit, Chile. This image relates to a paper that appeared in the Nov. 15, 2012, issue of Science Express, published by AAAS. The paper, by Philipp Weis at ETH Zurich in Zurich, Switzerland, and colleagues was titled, "Porphyry-Copper Ore Shells Form at Stable Pressure-Temperature Fronts Within Dynamic Fluid Plumes."
Credit: Image courtesy of ETH Zurich
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