Sulfur isotope ratios of Icelandic rocks |
| |
| Authors: | Peter Torssander |
| |
| Institution: | (1) Nordic Volcanological Institute, University of Iceland, IS-101 Reykjavik, Iceland;(2) Department of Geology, University of Stockholm, S-10691 Stockholm, Sweden |
| |
| Abstract: | Sulfur isotope ratios have been determined in 27 selected volcanic rocks from Iceland together with their whole rock chemistry. The
34S of analyzed basalts ranges from –2.0 to +0.4 with an average value of –0.8 Tholeiitic and alkaline rocks exhibit little difference in
34S values but the intermediate and acid rocks analyzed have higher
34S values up to +4.2 It is suggested that the overall variation in sulfur isotope composition of the basalts is caused by degassing. The small range of the
34S values and its similarity to other oceanic and continental basalts, suggest that the depleted mantle is homogeneous in its sulfur isotope composition. The
34S of the depleted mantle is estimated to be within the range for undegassed oceanic basalts, –0.5 to +1.0 |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
