Computer Science
Scientific paper
Sep 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984gecoa..48.1837u&link_type=abstract
Geochimica et Cosmochimica Acta, Volume 48, Issue 9, p. 1837-1848.
Computer Science
18
Scientific paper
The sulfide and sulfate contents and their δ34S values were determined in Quaternary volcanic rocks from the Japanese Islands Arc. The total sulfur contents are much lower (less than 40 ppm) and the δ34S values are higher (+4.4 ± 2.1) than those of ocean-floor basalts (800 ± 100 ppm and +0.8 ± 0.5, respectively; MOORE and FABBI, 1971; SAKAIet al., 1982). Lateral variations of both sulfur content and δ34S values were observed in the four volcanic belts in Japan. In the Northeast Japan belt, the sulfur content (30 ± 10 ppm) of the rocks in the inner zone (the Japan Sea side) is 3 to 5 times that in the outer zone (the Pacific side), although the δ34S values of the two zones are almost the same (+4.3 ± 1.0). The δ34S values for the two belts in West Japan are on the average 2%. higher than those of East Japan.This study suggests that the primary magmas that formed the island arc volcanic rocks are initially depleted in sulfur (<120 ppm) and enriched in 34S (δ34S: +5 ∼ +7) compared to ocean-floor tholeiitic basalts which formed at mantle under oceanic region. This indicates that the upper-mantle is heterogeneous in sulfur content and isotope composition.
Sakai Hitoshi
Ueda Akira
No associations
LandOfFree
Sulfur isotope study of Quaternary volcanic rocks from the Japanese Islands Arc does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Sulfur isotope study of Quaternary volcanic rocks from the Japanese Islands Arc, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Sulfur isotope study of Quaternary volcanic rocks from the Japanese Islands Arc will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1394330