| Abstract: | Geochemical and textural evidence for the submarine hydrothermal origin of the Bald Knob Mn deposit, North Carolina, is preserved in a mineralogically diverse suite of rocks that have experienced amphibolite facies metamorphism. Manganese- and Mn-Fe-rich lithologies have high Mn/Fe ratios and low concentrations of Ni, Cu, Zn, U, Th, and rare earth elements that are similar to concentrations reported from other ancient manganiferous deposits and from crusts and sediments which are forming in hydrothermally active regions of the present sea floor. The association of the manganiferous lithologies with chert and meta-igneous rocks is consistent with deposition of the sediments in a rifting environment, such as a back-arc basin, or possibly, a midocean ridge. -from Author |
| Genre: | Article |
| ProdID: | 70017083 |
| Citation Author: | Flohr, M. J. K. |
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| Citation End Page: | 2040 |
| Citation Issue: | 8 |
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| Citation Language: | English |
| Citation Larger Work Title: | Economic Geology |
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| Citation Number Of Pages: | 18 |
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| Citation Search Results Text: | Geochemistry and origin of the Bald Knob manganese deposit, North Carolina; 1992; Article; Journal; Economic Geology; Flohr, M. J. K. |
| Citation Start Page: | 2023 |
| Citation Volume: | 87 |
| Citation Year: | 1992 |
| Type: | citation/reference |
| Text: | Geochemistry and origin of the Bald Knob manganese deposit, North Carolina; 1992; Article; Journal; Economic Geology; Flohr, M. J. K. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Wed, 1 Jan 1992 00:00 -0600 |
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