Abstract
Carbon micro- and nanoscale structures formed during the consolidation of magmatic rocks is investigated. They are very similar to nanoscale carbon structures synthesized in a laboratory. A wide range of elements (Fe, K, Ti, V, Cr, Mn, Ni, Pt, Zn, Ga, Ge, Br, Sr, Zr, and Pb) are identified by XRF analysis in natural globules of graphite containing micro- and nanoscale structures. Some of these elements are thought to be natural catalysts in the formation of carbon structures by chemical vapor phase deposition (CCVD); the rest (rare-earth and noble metals) are considered to be useful as indicators of host rock mineralization.
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