Sano, Sakae and Hayasaka, Yasutaka (2003): Sr and Nd isotope geochemistry of Hole 1179D basalts

Leg/Site/Hole:
ODP 191
ODP 191 1179
Identifier:
2005-072226
georefid
10.2973/odp.proc.sr.191.006.2004
doi
Creator:
Sano, Sakae
Ehime University, Earth Science Laboratory, Matsuyama, Japan
author
Hayasaka, Yasutaka
University of Tokyo, Japan
author
Identification:
Sr and Nd isotope geochemistry of Hole 1179D basalts
2003
In: Sager, William W., Kanazawa, Toshihiko, Escutia, Carlota, Araki, Eiichiro, Arney, James E., Carlson, Richard L., Downey, Warna S., Einaudi, Florence, Haggas, Sarah L., Hayasaka, Yasutaka, Hirata, Kenji, Horner-Johnson, Benjamin C., Mandernack, Kevin W., McCarthy, Francine M. G., Moberly, Ralph, Mochizuki, Masashi, Pedersen, Rikke Ohlenschlaeger, Salimullah, Ali R. M., Shinohara, Masanao, Werner, Carl-Dietrich, Proceedings of the Ocean Drilling Program; scientific results; Northwest Pacific Seismic Observatory and hammer drill tests; covering Leg 191 of the cruises of the drilling vessel JOIDES Resolution; Yokohama, Japan, to Apra Harbor, Guam; Sites 1179-1182; 16 July-8 September 2000
Texas A&M University, Ocean Drilling Program, College Station, TX, United States
191
Sr and Nd isotopic compositions of 19 basalts from Hole 1179D, Leg 191 were analyzed to determine ridge and plume interaction. (super 87) Sr/ (super 86) Sr and (super 143) Nd/ (super 144) Nd ratios of the basalts ranged from 0.7029 to 0.7040 and from 0.5131 to 0.5132 (Nd (sub 0) = 9.3 approximately 10.8), respectively. Calculated initial isotopic compositions at 129 Ma, the age of magnetic Anomaly M8, are (super 87) Sr/ (super 86) Sri = 0.7026 approximately 0.7033 and epsilon Nd (sub T) = 9.2 approximately 10.6. The initial Sr isotope ratio is higher than that of normal mid-ocean-ridge basalts (MORBs) from the East Pacific Rise and Mesozoic MORBs. They are similar to those of the Shatsky Rise, suggesting a plume component was involved in the formation.
English
Serial
Coverage:Geographic coordinates:
North:41.0500
West:159.5700East: 159.5800
South:41.0400
Isotope geochemistry; Igneous and metamorphic petrology; alkaline earth metals; basalts; cores; geochemistry; igneous rocks; isotope ratios; isotopes; Leg 191; magnetic anomalies; Mesozoic; metals; mid-ocean ridge basalts; mineral composition; Nd-144/Nd-143; neodymium; North Pacific; Northwest Pacific; Ocean Drilling Program; ocean floors; ODP Site 1179; Pacific Ocean; rare earths; Shatsky Rise; Sr-87/Sr-86; stable isotopes; strontium; volcanic rocks; West Pacific;
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