40Ar/39Ar ages of boulders drilled at DSDP Hole 57-439

Autoria(s): Yanagisawa, Masahisa; Takigami, Yutaka; Ozima, Minoru; Kaneoka, Ichiro
Cobertura

LATITUDE: 40.626800 * LONGITUDE: 143.310500 * DATE/TIME START: 1977-11-03T00:00:00 * DATE/TIME END: 1977-11-03T00:00:00
Data(s)

19/11/1980
Resumo

The 40Ar/39Ar stepheating dating method was applied to parts of three boulders recovered at Site 439, DSDP Leg 57. All the samples gave a well-defined isochron. The isochron ages agree with each other within the experimental uncertainties and give a mean value of 21.4 ± 1.0 Ma.
Formato

application/zip, 2 datasets
Identificador

https://doi.pangaea.de/10.1594/PANGAEA.823070

doi:10.1594/PANGAEA.823070
Idioma(s)

en
Publicador

PANGAEA
Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted
Fonte

Supplement to: Yanagisawa, Masahisa; Takigami, Yutaka; Ozima, Minoru; Kaneoka, Ichiro (1980): 40Ar/39Ar ages of boulders drilled at Site 439, Leg 57, Deep Sea Drilling Project. In: Scientific Party, Initial Reports of the Deep Sea Drilling Project, 56/57 (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 56-57, 1281-1284, doi:10.2973/dsdp.proc.5657.160.1980
Palavras-Chave ## = Because of small 36Ar peaks, it was difficult to assign error estimates (at the 900°C, 1000°C fraction of Core 439-33 and the 950°C fraction of Core 439-36). After the correction for Ca-induced 36Ar, 36Ar value became negative (at the 1000°C fraction of Core 439-33). However, these did not affect the apparent ages; 37Ar/36Ar; 39Ar; 39Ar/36Ar; 39Ar/36Ar e rel; 40Ar/36Ar; 40Ar/36Ar e rel; 57-439; Age, 40Ar/39Ar Argon-Argon; Age, dated; Age, dated standard deviation; Age, York's method (York, 1969); Age dated; Age std dev; Argon-37/Argon-36; Argon-39; Argon-39/Argon-36; Argon-39/Argon-36, error, relative; Argon-40/Argon-36; Argon-40/Argon-36, error, relative; Coeff; Coefficient; Comment; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Fraction; Glomar Challenger; Isochron; Label; Leg57; Mineral; Mineral name; North Pacific/TRENCH; ODP sample designation; Plateau; Plateau; # = calculated from the 600°, 700°, 900°, and 1000° C fractions; r; correlation coefficient (York, 1969; doi:10.1016/S0012-821X(68)80059-7); Sample code/label; Suggested geological; SUMS = S in York 1969. Figures in parentheses are cut-off values for the confidence limit of 95 per cent (Brooks et al., 1972; Roddick, 1978); Temperature, technical; Total fusion age = 1/lambda ln [1 + J(40Ar/39Ar)total], (40Ar/39Ar)total = SUM(n; i=1) fi(40Ar/39Ar)i; T tech
Tipo

Dataset
Acesso ao item digital