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Titolo:
LEAD AND HELIUM ISOTOPE EVIDENCE FROM OCEANIC BASALTS FOR A COMMON DEEP SOURCE OF MANTLE PLUMES
Autore:
HANAN BB; GRAHAM DW;
Indirizzi:
SAN DIEGO STATE UNIV,DEPT GEOL SCI SAN DIEGO CA 92182 OREGON STATE UNIV,COLL OCEAN & ATMOSPHER SCI CORVALLIS OR 97331
Titolo Testata:
Science
fascicolo: 5264, volume: 272, anno: 1996,
pagine: 991 - 995
SICI:
0036-8075(1996)272:5264<991:LAHIEF>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPREADING CENTER SYSTEM; MID-ATLANTIC RIDGE; SOUTH-ATLANTIC; VOLCANIC-ROCKS; LOIHI SEAMOUNT; EARTHS MANTLE; EVOLUTION; PB; ISLAND; ORIGIN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
61
Recensione:
Indirizzi per estratti:
Citazione:
B.B. Hanan e D.W. Graham, "LEAD AND HELIUM ISOTOPE EVIDENCE FROM OCEANIC BASALTS FOR A COMMON DEEP SOURCE OF MANTLE PLUMES", Science, 272(5264), 1996, pp. 991-995

Abstract

Linear arrays in lead isotope space for mid-ocean ridge basalts (MORBs) converge on a single end-member component that has intermediate lead, strontium, and neodymium isotope ratios compared with the total database for oceanic island basalts (OIBs) and MORBs. The MORE data are consistent With the presence of a common mantle source region for OIBs that is sampled by mantle plumes. He-3/He-4 ratios for MORBs show bothpositive and negative correlation with the Pb-206/Pb-204 ratios, depending on the MORE suite. These data suggest that the common mantle source is located in the transition zone region. This region contains recycled, oceanic crustal protoliths that incorporated some continental lead before their subduction during the past 300 to 2000 million years.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 02:54:06