Primitive neon from the center of the Galápagos hotspot

Kurz, Mark D.; Curtice, Joshua; Fornari, D.J.; Geist, D.; Moreira, Manuel

doi:10.1016/j.epsl.2009.06.008

Cited by 105 publications

(95 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Galapagos lavas show the most primitive neon signature on Earth Raquin and Moreira, 2009) and Figure 6.11 shows the time evolution of the 21 Ne/ 22 Ne ratio in the mantle. If the source of Galapagos lavas represents a melt residue, the model age of this melting event is >4.3 Ga as demonstrated by Kurz et al (2009). Similarly, Porcelli and Elliott (2008) quantified that, even if U+Th and He could be appropriately fractionated, the most unradiogenic OIB 4 He/ 3 He isotope ratios required isolation for >3 Ga.…”

Section: Figure 69mentioning

confidence: 99%

“…This value is radiogenic compared to the solar value (2,500; R/Ra ~290), but much less radiogenic compared to the MORB ratio (90,000; R/Ra = 8). Hawaii, Iceland and Galapagos hotspots also show primitive helium isotopic ratios, although less primitive (non-radiogenic) than the Baffin samples (Kurz et al, 1983;Kurz et al, 1985;Graham et al, 1998;Hilton et al, 1999;Kurz et al, 2009). The origin of these low 4 He/ 3 He ratios in OIB will be discussed in detail in Section 6, in the context of the noble gas systematics.…”

Section: Oceanic Island Basalts (Oib)mentioning

confidence: 99%

“…An important point repeatedly raised by Anderson is the so-called "helium paradox", which notes that submarine glass samples in low 4 He/ 3 He hotspots and erupted deep enough (or under glaciers) to avoid massive degassing contain significantly less helium than MORB which the opposite is expected from their isotope systematics (Kurz et al, 1983;Honda et al, 1991Honda et al, , 1993Moreira et al, 1995;Harrison et al, 1999;Breddam et al, 2000;Dixon et al, 2000;Moreira and Sarda, 2000;Trieloff et al, 2000;Moreira et al, 2001;Kurz et al, 2009;Mukhopadhyay, 2012). To counter this dilemma it has been suggested that the helium loss is pre-eruptive (Hopp and Trieloff, 2008) or that hotspot lavas contain less helium because they contain more water and CO 2 , favouring more extreme degassing than in a ridge setting (Hilton et al, 2000b;Yamamoto and Burnard, 2005;Gonnermann and Mukhopadhyay, 2007).…”

Section: Anderson's Revoltmentioning

confidence: 99%

“…The objective of these studies on Galapagos and Iceland samples were twofold (Harrisson et al, 1999;Dixon et al, 2000;Trieloff et al, 2000;Moreira et al, 2001;Dixon, 2003;Kurz et al, 2009;Mukhopadhyay, 2012): firstly to verify if OIB source has less nucleogenic neon than the MORB source and secondly to determine the 20 Ne/ 22 Ne ratio of this reservoir. The first objective has been met since the results from these two hotspots confirm those of Hawaii and Samoa (Honda et al, 1991;Poreda and Farley, 1992;Honda et al, 1993;Valbracht et al, 1997;Jackson et al, 2009).…”

Section: Figure 55mentioning

confidence: 99%

See 3 more Smart Citations

Noble gas constraints on the origin and evolution of Earth’s volatiles

Moreira¹

2013

GeochemPersp

Self Cite

115

164

View full text Add to dashboard Cite

Section: Figure 69mentioning

confidence: 99%

Section: Oceanic Island Basalts (Oib)mentioning

confidence: 99%

Section: Anderson's Revoltmentioning

confidence: 99%

Section: Figure 55mentioning

confidence: 99%

See 2 more Smart Citations

Noble gas constraints on the origin and evolution of Earth’s volatiles

Moreira¹

2013

GeochemPersp

Self Cite

115

164

View full text Add to dashboard Cite

“…These OIB samples, AHA-NEMO2-D22A and AHA-NEMO2-D22B, were chosen due to their very primitive He and Ne compositions (Kurz et al, 2009), relatively high gas concentrations and thick glassy rinds (results are in Tables S-2 and S-3).…”

Section: Introductionmentioning

confidence: 99%

Solar wind implantation supplied light volatiles during the frst stage of Earth accretion

Péron¹,

Moreira²,

Putlitz³

et al. 2017

Geochem. Persp. Let.

View full text Add to dashboard Cite

doi: 10.7185/geochemlet.1718The isotopic and elemental compositions of noble gases constitute a powerful tool to study volatile origin and evolution, due to their inertness, and can thus provide crucial information about the early stage of planetary formation. Two models are proposed to explain the light noble gas origin on Earth: the solar wind implantation model and the solar nebula gas dissolution model. However, noble gas measurements often show addition of air to the mantle-derived gas, which complicates the determination of mantle isotopic ratios. We analysed the noble gas isotopic compositions of single vesicles in samples from the Galápagos hotspot with laser ablation, in order to understand and remove this atmospheric component, as well as discriminate between the two scenarios. Based on the new high precision results and a new statistical approach, we show that the solar wind implantation model is more likely to explain the terrestrial He, Ne and Ar composition. This scenario could bring important constraints on the solar system environment during the early stage of planetary formation.

show abstract

Deep plume origin of the Louisville hotspot: Noble gas evidence

Hanyu

2014

Geochem Geophys Geosyst

View full text Add to dashboard Cite

Noble gas compositions have been reported for basaltic core samples from Louisville seamounts recovered during IODP Expedition 330. The in-vacuum crushing techniques were employed to extract noble gases from fresh olivine phenocrysts and submarine glasses with ages between 50 and 74 Ma.Stepwise crushing tests confirmed the extraction of magmatic noble gases from the olivine samples with minimal release of posteruption radiogenic nuclides; however, this was not always the case for the glass samples. The 3 He/ 4 He ratios of the studied samples range from a value similar to those of mid-ocean ridge basalts (MORB) to slightly elevated ratios up to 10.6 Ra. These ratios are not as high as those observed in other ocean island basalts, suggesting that the Louisville mantle plume was weak or the samples represent late-stage magmatic activity of the seamounts. However, two Louisville seamount basalts exhibit a primordial Ne isotopic signature that can be clearly discriminated from MORB Ne ratios. The He and Ne isotopic compositions of the Louisville seamount basalts can be explained by the mixing of less degassed mantle and depleted upper mantle with different He/Ne ratios. The presence of the less degassed mantle component in the source of the Louisville seamounts documents a deep origin of their mantle plume.

show abstract

Primitive neon from the center of the Galápagos hotspot

Cited by 105 publications

References 64 publications

Noble gas constraints on the origin and evolution of Earth’s volatiles

Noble gas constraints on the origin and evolution of Earth’s volatiles

Solar wind implantation supplied light volatiles during the frst stage of Earth accretion

Deep plume origin of the Louisville hotspot: Noble gas evidence

Contact Info

Product

Resources

About