/* DATA DESCRIPTION:
Citation:	Sano, Yuji; Sakamoto, Minoru; Ishibashi, Jun-ichiro; Wakita, Hiroshi; Matsumoto, Ryo (1992): Helium isotope ratios and pore gases in deep-sea sediments of the Japan Sea [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.777329, 
	Supplement to: Sano, Y et al. (1992): Helium isotope ratios of pore gases in deep-sea sediments, Leg 128. In: Pisciotto, KA; Ingle, JCJr.; von Breymann, MT; Barron, J; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 127/128(1), 747-751, https://doi.org/10.2973/odp.proc.sr.127128-1.182.1992
Abstract:	We have measured the 3He/4He and 4He/20Ne ratios and chemical compositions of gases exsolved from deep-sea sediments at two sites (798 and 799) in the Japan Sea. The 3He/4He and 4He/20Ne ratios vary from 0.642 Ratm (where Ratm is the atmospheric 3He/4He ratio of 1.393*10**-6) to 0.840 Ratm, and from 0.41 to 4.5, respectively. Helium in the samples can be explained by the mixing between atmospheric helium dissolved in bottom water of the Japan Sea and crustal helium in the sediment. The sedimentary helium is enriched in mantle-derived 3He compared with those from the Japan Trench and the Nankai Trough. This suggests that the basement of the Japan Sea has relatively large remnants of mantle-derived helium compared with that of the Pacific. Major chemical compositions of the samples are methane and nitrogen. There is a positive correlation between methane content and helium content corrected for air component. Based on the 3He/4He-Sum C/3He diagram, the major part of methane can be attributed to crustal and/or organic origin.
Project(s):	Ocean Drilling Program (ODP) (URI: https://www-odp.tamu.edu:443/)
Coverage:	MEDIAN LATITUDE: 38.493100 * MEDIAN LONGITUDE: 134.177867 * SOUTH-BOUND LATITUDE: 37.038300 * WEST-BOUND LONGITUDE: 133.866900 * NORTH-BOUND LATITUDE: 39.220500 * EAST-BOUND LONGITUDE: 134.799800
	DATE/TIME START: 1989-08-27T07:15:00 * DATE/TIME END: 1989-09-18T19:45:00
Event(s):	128-798A * LATITUDE: 37.038300 * LONGITUDE: 134.799800 * DATE/TIME START: 1989-08-27T07:15:00 * DATE/TIME END: 1989-08-28T10:24:00 * ELEVATION: -914.0 m * Penetration: 143.3 m * Recovery: 148.27 m * LOCATION: Japan Sea * CAMPAIGN: Leg128 (URI: https://doi.org/10.2973/odp.proc.ir.128.1990) * BASIS: Joides Resolution (URI: https://www-odp.tamu.edu:443/resolutn.html) * METHOD/DEVICE: Drilling/drill rig (DRILL) * COMMENT: 17 cores; 143.3 m cored; 0 m drilled; 103.5 % recovery
	128-799A * LATITUDE: 39.220500 * LONGITUDE: 133.866900 * DATE/TIME START: 1989-09-14T16:30:00 * DATE/TIME END: 1989-09-18T19:45:00 * ELEVATION: -2085.0 m * Penetration: 468.7 m * Recovery: 440.04 m * LOCATION: Japan Sea * CAMPAIGN: Leg128 (URI: https://doi.org/10.2973/odp.proc.ir.128.1990) * BASIS: Joides Resolution (URI: https://www-odp.tamu.edu:443/resolutn.html) * METHOD/DEVICE: Drilling/drill rig (DRILL) * COMMENT: 52 cores; 468.7 m cored; 0 m drilled; 93.9 % recovery
License:	Creative Commons Attribution 3.0 Unported (CC-BY-3.0) (URI: https://creativecommons.org/licenses/by/3.0/)
Size:	3 datasets
*/
/* TABULAR SUMMARY OF DATASETS LISTED IN THIS COLLECTION: */
Filename	Citation of child dataset
128-798_799_gas.tab	Sano, Yuji; Sakamoto, Minoru; Ishibashi, Jun-ichiro; Wakita, Hiroshi; Matsumoto, Ryo (1992): (Table 2) Chemical composition of gases exolved from deep-sea sediments of the Japan Sea. https://doi.org/10.1594/PANGAEA.777325
128-798_799_Helium.tab	Sano, Yuji; Sakamoto, Minoru; Ishibashi, Jun-ichiro; Wakita, Hiroshi; Matsumoto, Ryo (1992): (Table 1) 3He/4He and 4He/20Ne ratios of gases exolved from deep-sea sediments of the Japan Sea. https://doi.org/10.1594/PANGAEA.777324
128-798_799_Helium_corrected.tab	Sano, Yuji; Sakamoto, Minoru; Ishibashi, Jun-ichiro; Wakita, Hiroshi; Matsumoto, Ryo (1992): (Table 3) Corrected 3He/4He ratios of gases exolved from deep-sea sediments of the Japan Sea. https://doi.org/10.1594/PANGAEA.777328
