Noble gas study of a philippinite with an unusually large bubble

Matsuda, Jun‐ichi; Maruoka, Teruyuki; Pinti, Daniele L.; Koeberl, Christian

doi:10.1111/j.1945-5100.1996.tb02023.x

Cited by 16 publications

(13 citation statements)

References 34 publications

(26 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Neon is equally enriched in all forms of tektites as well as impactites ; while in our present Muong Nong tektite samples, we also find excess 4He. Such excess 4He has been found so far in a large bubble of philippinite (Matsuda et al, 1996). In Fig.…”

Section: Noble Gasessupporting

confidence: 67%

Noble gases and nitrogen in Muong Nong tektites

Murty

1997

Meteorit & Planetary Scien

View full text Add to dashboard Cite

Abstract-Three samples of Muong Nong tektites have been studied for N and noble gases. The isotopic composition of noble gases is airlike. The noble gas amounts are much higher in Muong Nong tektites than in splash-form tektites. As compared to air, He and Ne have been enriched, most likely due to inward diffuion from ambient air, subsequent to glass formation. Nitrogen contents range from 0.3 to 1.34 ppm, with a non-atmospheric d15N ranging from 8 to 17%0. The release pattern of d15N clearly shows the presence of two N components. Higher N/36Ar values than those of air, together with positive B15N, show that a major portion of N in Muong Nong tektites is a remnant from the sedimentary source material.

show abstract

Section: Noble Gasessupporting

confidence: 67%

Noble gases and nitrogen in Muong Nong tektites

Murty

1997

Meteorit & Planetary Scien

View full text Add to dashboard Cite

show abstract

“…The details of the crushing apparatus and the procedure of noble gas analyses are given elsewhere (Matsuda et al, 1996;Matsumoto et al, 2001). The hot blank amounts were 4 He = 1.0-1.4 × 10 -9 cm 3 STP and 36 Ar = 0.2-1.3 × 10 -10 cm 3 STP.…”

Section: Samples and Experimentsmentioning

confidence: 99%

“…The samples were crushed or fused at 1600°C in vacuum and the extracted gas was analyzed. The total gas amounts and isotopic ratios of helium (and of argon for some samples) were determined with a VG5400 noble gas mass spectrometer at Osaka Univer- (Matsuda et al, 1996). For other samples, we used the crusher using a piston moving up and down with an external compressed air (Matsumoto et al, 2001).…”

Section: Samples and Experimentsmentioning

confidence: 99%

Helium in old porcelain: The historical variation of the He isotopic composition in air

2010

Self Cite

View full text Add to dashboard Cite

It is still debated whether there is a variation of the atmospheric 3 He/ 4 He ratio, due to the anthropogenic release of radiogenic 4 He contained in fossil fuels, in modern era. In this study, we measured the He isotopic ratios in old Chinese and Japanese porcelains assuming that the old atmosphere might have been preserved in vesicles. The trapped noble gases are elementally but not isotopically fractionated. The 3 He/ 4 He ratios in some old Chinese porcelain are significantly higher than the present air value, indicating that recent human industrial activity might have affected the helium isotopic ratio of the atmosphere. Our result indicates that the rate of change in the atmospheric 3 He/ 4 He ratio was -0.034 ± 0.018 %/year (2σ) in the last 200 years. Results show that porcelain can be used as a time capsule of the paleoatmosphere during historical age.

show abstract

“…Gas contents of tektites are very low, indicating solidification at high atmospheric heights (e.g. 40-50 km for a philippinite from the Australasian strewn field (Matsuda et al, 1996)) and, in some cases, there is evidence of remelting on re-entry into the atmosphere (Koeberl, 1994). Tektites are generally considered to be the product of early-stage shock compression of surface materials and their acceleration after decompression (e.g.…”

Section: Distal Varietiesmentioning

confidence: 99%