| Abstract: | Basal metalliferous sediments from sites 77B, 80 and 81 of the Deep Sea Drilling Project represent mixtures of pelagic clay, biogenic ooze, and a metalliferous component of hydrothermal origin. The metalliferous end-member of the sediments displays a strong inverse relationship (r = -0.88) between Mg and Mn. Mg is most likely tied up in an X-ray amorphous Mg-silicate ("sepiolite"), whereas Mn occurs almost exclusively in an oxide phase. Precipitation of the Mg-rich phase is favored by high flow rates and limited mixing of the hydrothermal end-member (source of silica) with seawater (source of Mg). Under those conditions much of the hydrothermal Mn2+, with its slow oxidation kinetics, may escape to the free water column. In contrast, in highly-diluted hydrothermal fluids, which provide a source solution for Mn-rich sediments, dissolved silica is diluted below saturation with respect to "sepiolite". The separation of the Mn and Mg phases may be further compounded by hydraulic fractionation. ?? 1981. |
| Genre: | Article |
| ProdID: | 70011733 |
| Citation Author: | Bloch, S. |
| Citation Contributing Office: | |
| Citation Datum: | |
| Citation Day: | |
| Citation Edition: | |
| Citation Editor: | |
| Citation End Page: | 113 |
| Citation Issue: | 1-4 |
| Citation Keywords: | |
| Citation Language: | English |
| Citation Larger Work Title: | Chemical Geology |
| Citation LatN: | |
| Citation LatS: | |
| Citation LonE: | |
| Citation LonW: | |
| Citation Month: | |
| Citation No Pagination: | |
| Citation Number Of Pages: | 13 |
| Citation Online Only Flag: | |
| Citation Phsyical Description: | |
| Citation Projection: | |
| Citation Public Comments: | |
| Citation Publisher: | Elsevier |
| Citation Series: | |
| Citation Series Code: | |
| Citation Series Number: | |
| Citation Search Results Text: | Antipathetic magnesium-manganese relationship in basal metalliferous sediments; 1981; Article; Journal; Chemical Geology; Bloch, S. |
| Citation Start Page: | 101 |
| Citation Volume: | 33 |
| Citation Year: | 1981 |
| Type: | citation/reference |
| Text: | Antipathetic magnesium-manganese relationship in basal metalliferous sediments; 1981; Article; Journal; Chemical Geology; Bloch, S. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1016/0009-2541(81)90088-7 |
| Date Other: | Thu, 1 Jan 1981 00:00 -0600 |
| Publisher: | Elsevier |
