2003
DOI: 10.1016/s0012-821x(02)01071-3
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Interpretation of helium and neon isotopic heterogeneity in Icelandic basalts

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Cited by 29 publications
(29 citation statements)
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“…The Eldborg basalt flow studied here has a previously reported 3 He/ 4 He = 19±2 R A (Dixon et al, 2003). Published data for Iceland lavas within the neovolcanic zones have 3 He/ 4 He ranging from 8.0 to 21 R A (Breddam et al, 2000;Macpherson et al, 2005, and references therein), with one glass sample having a value as high as 26 R A (Kurz et al,l985) .…”
Section: Resultssupporting
confidence: 49%
“…The Eldborg basalt flow studied here has a previously reported 3 He/ 4 He = 19±2 R A (Dixon et al, 2003). Published data for Iceland lavas within the neovolcanic zones have 3 He/ 4 He ranging from 8.0 to 21 R A (Breddam et al, 2000;Macpherson et al, 2005, and references therein), with one glass sample having a value as high as 26 R A (Kurz et al,l985) .…”
Section: Resultssupporting
confidence: 49%
“…Involvement of DMM is in agreement with the model of Hauri et al (1994) showing the entrainment of material surrounding the plume conduit due to heat diffusion. The contribution of DMM material in the Iceland mantle plume is corroborated by numerous studies (Mertz et al, 1991;Haase et al, 1996;Hanan and Schilling, 1997;Dixon et al, 2000;Hanan et al, 2000;Dixon, 2003;Stracke et al, 2003;BlichertToft et al, 2005) though several authors argued against the presence of DMM material in lavas erupted in Iceland (Fitton et al, 1997;Chauvel and Hémond, 2000;Kempton et al, 2000;Skovgaard et al, 2001;Fitton et al, 2003;Kokfelt et al, 2006;Thirlwall et al, 2006). Skovgaard et al (2001) acknowledged that the near-chondritic 187 Os/ 188 Os values observed in picrites are close to the DMM values, but they attributed the low d 18 O of the same samples to the presence of hydrothermally altered suboceanic lithosphere in their source.…”
Section: Components Existing In the Iceland Mantle Plumementioning
confidence: 61%
“…It is easier to keep such reservoirs isolated over relatively long time periods in a highly viscous lower mantle, especially if primordial He resides in refractory cumulates (Albarède, 2008). The long-term storage of a relatively undegassed source away from the upper mantle melting regions is required to explain the close-tosolar-values neon isotope ratios measured in Icelandic lavas (Dixon et al, 2000;Dixon, 2003). Recycled oceanic crust located at the bottom of the mantle is likely to be negatively buoyant.…”
Section: Components Existing In the Iceland Mantle Plumementioning
confidence: 99%
“…Indeed, Honda et al (1993) noted a strong correlation between He and Ne isotopes for some OIB; steeper trajectories in three-isotope neon space (i.e., low 21 Ne/ 22 Ne ratios for a given 20 Ne/ 22 Ne value) were characterized by samples with high 3 He/ 4 He ratios. However, more recent studies of basalts from Iceland (Harrison et al, 1999;Dixon et al, 2000;Trieloff et al, 2000;Moreira et al, 2001;Dixon, 2003), the East Pacific Rise (Niedermann et al, 1997), and the Manus Basin (Shaw et al, 2001) have challenged the view that the He and Ne isotope systematics are correlated. The apparent decoupling between helium and neon at these locations may bear fundamental information on the nature of mantle source regions, mantle dynamics, and the degassing history of the Earth.…”
Section: Introductionmentioning
confidence: 99%