10.1594/PANGAEA.792927Wakita, HiroshiHiroshiWakitaSano, YujiYujiSano0000-0002-3305-5644Fujii, NaoyukiNaoyukiFujiiTakeuchi, AkiraAkiraTakeuchiPANGAEA1986Event labelSample, optional label/labor noDEPTH, sediment/rockHelium-3/Helium-4 ratioHelium-3/Helium-4 ratio, standard deviationHelium-4/Neon-20Composite Coresee reference(s)Mass spectrometry (MS)Leg84Leg90Glomar ChallengerDeep Sea Drilling Project (DSDP)1982-02-08T00:00:00/1983-01-03T00:00:00Supplementary Dataset10.2973/dsdp.proc.90.134.198636 data pointstext/tab-separated-valuesCreative Commons Attribution 3.0 UnportedStudies on He isotope ratios of gas and rock samples in various parts of the world have shown a close relation between the 3He/4He ratio and geotectonic features of the sampling area. Emission of primordial He is commonly found in gases and fluid in Cenozoic volcanic areas (mid-ocean ridges, hot spots, and subduction zones), whereas that of radiogenic He is predominant in continental areas. Thus, the 3He/4He ratio is considered a useful tool for evaluating a variety of geotectonic environments.Supplement to: Wakita, Hiroshi; Sano, Yuji; Fujii, Naoyuki; Takeuchi, Akira (1986): 3He/4He ratios of pore gases in deep-sea sediments, Legs 89 and 90. In: Kennett, JP; von der Borch, CC; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 90, 1261-1263-90.8174.948-45.523513.0722North Pacific/SLOPESouth Pacific/CONT RISE