Computer Science
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986e%26psl..78..157n&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 78, no. 2-3, June 1986, p. 157-167. Research supported by the Kyoto S
Computer Science
13
Geochemistry, Geochronology, Neodymium Isotopes, Sea Of Japan, Strontium Isotopes, Volcanology, Continents, Earth Crust, Magma, Marine Environments, Planetary Composition, Rocks
Scientific paper
Nd and Sr isotopic analyses were performed on selected volcanic rocks of 27-6 Ma age in the Green Tuff region of northeastern Japan, in adjacent areas, and in two ultramafic inclusions from Ichinomegata. The isotopic data plot generally along the region of the mantle array, and the volcanic rocks vary in epsilon(Nd) from -0.9 to 5.7, and in epsilon(Sr) from 14.1 to -16.3. It is found that the volcanic rocks are part of an evolutionary pattern over a time period of 27 Ma, and that the pattern goes from an initially enriched source to that of a very depleted source. A greater-than-15-Ma preopening stage, characterized by an enriched isotopic signature, and a less-than-15-Ma postopening stage, characterized by a depleted signature, are identified. It is suggested that the degree of continental crust involvement is high during the preopening stages of a back-arc basin when it is associated with a rifted continental mass.
Nohda Susumu
Wasserburg Gerald J.
No associations
LandOfFree
Trends of Sr and Nd isotopes through time near the Japan Sea in northeastern Japan 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 Trends of Sr and Nd isotopes through time near the Japan Sea in northeastern Japan, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Trends of Sr and Nd isotopes through time near the Japan Sea in northeastern Japan will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1831905