Convergence of sulfide deposits |
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| Abstract: | Sulfide deposits are believed to be convergent, that is, similar in composition, structure, and geologic location, but different in genesis. The three chief genetic classifications of sulfide deposits are: 1) sedimentary - exhalational, 2) subvolcanic exhalational - hydrothermal, and 3) plutonic hydrothermal. The first two groups are very closely related,frequently forming almost simultaneously with the same stage of volcanic activity in spilite-keratophyre rocks of eugeosynclines. They are associated with the derivatives of basaltic magmas. The plutonic hydrothermal sulfide deposits are associated with porphyry series of rocks in the marginal zones of geosynclines, generated by a granitoid magma.—E. K. Russell. |
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