Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
MANTLE PLUME HELIUM IN SUBMARINE BASALTS FROM THE GALAPAGOS PLATFORM
Autore:
GRAHAM DW; CHRISTIE DM; HARPP KS; LUPTON JE;
Indirizzi:
OREGON STATE UNIV,COLL OCEAN & ATMOSPHER SCI CORVALLIS OR 97331 NOAA,PACIFIC MARINE ENVIRONM LAB,HATFIELD MARINE SCI CTR NEWPORT OR 97365 CORNELL UNIV,DEPT GEOL SCI ITHACA NY 14853
Titolo Testata:
Science
fascicolo: 5142, volume: 262, anno: 1993,
pagine: 2023 - 2026
SICI:
0036-8075(1993)262:5142<2023:MPHISB>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPREADING CENTER SYSTEM; ISOTOPE GEOCHEMISTRY; LOIHI SEAMOUNT; OCEANIC ISLANDS; VOLCANIC-ROCKS; TRACE-ELEMENT; HOTSPOT; HAWAII; PB; ND;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
48
Recensione:
Indirizzi per estratti:
Citazione:
D.W. Graham et al., "MANTLE PLUME HELIUM IN SUBMARINE BASALTS FROM THE GALAPAGOS PLATFORM", Science, 262(5142), 1993, pp. 2023-2026

Abstract

Helium-3/helium-4 ratios in submarine basalt glasses from the Galapagos Archipelago range up to 23 times the atmospheric ratio in the west and southwest. These results indicate the presence of a relatively undegassed mantle plume at the Galapagos hot spot and place Galapagos alongside Hawaii, Iceland, and Samoa as the only localities known to havesuch high helium-3/helium-4 ratios. Lower ratios across the rest of the Galapagos Archipelago reflect systematic variations in the degree of dilution of the plume by entrainment of depleted material from the asthenosphere. These spatial variations reveal the dynamics of the underlying mantle plume and its interaction with the nearby Galapagos Spreading Center.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 12:54:00