Abstract
Rhenium loss through magma degassing could be partly balanced by rhenium enrichment in fumarolic magmatic gases and Re-bearing precipitates, as may be the case for the Kudriavy volcano associated with an active subduction zone. The relatively unradiogenic (187)Os/(188)Os isotope ratios (0.122 up to 0.152) and high Os contents (averaging 0.6 ppb) of fumarolic gas condensates imply that significant Re and Os are remobilised from depleted MORB mantle. Involvement of a Re-rich component is evident from high Re concentrations in high-temperature gas condensates, ranging from 7 to 200 ppb. Indeed, Re-rich Os-poor components such as organic-rich subducted sediments and volcanic rocks do not significantly shift the isotopic composition of fumarolic products. The relatively radiogenic composition of the dacite-andesite-basaltic arc volcanics ((187)Os/(188)Os ratio up to 0.58), however, could result from significant Os (and Re) input from subducted sediments.
Original language | English |
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Title of host publication | Mineral deposit research |
Subtitle of host publication | meeting the global challenge |
Editors | Jingwen Mao, Frank P. Bierlein |
Place of Publication | Berlin; Heidelberg |
Publisher | Springer, Springer Nature |
Pages | 841-843 |
Number of pages | 3 |
ISBN (Electronic) | 9783540279464 |
ISBN (Print) | 9783540279457 |
DOIs | |
Publication status | Published - 2005 |
Externally published | Yes |
Event | 8th Biennial SGA Meeting - Beijing, China Duration: 18 Aug 2005 → 21 Aug 2005 |
Conference
Conference | 8th Biennial SGA Meeting |
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Country/Territory | China |
City | Beijing |
Period | 18/08/05 → 21/08/05 |
Keywords
- Re-Os
- subduction zone
- rheniite
- Kurile islands
- Kudriavy
- RE
- SUBDUCTION
- KUDRYAVY
- ISLANDS
- CRUST