40Ar-39Ar geochronological studies on rocks drilled at DSDP Holes 61-462 and 61-462A
| Cobertura |
MEDIAN LATITUDE: 7.239600 * MEDIAN LONGITUDE: 165.031100 * SOUTH-BOUND LATITUDE: 7.237500 * WEST-BOUND LONGITUDE: 165.030500 * NORTH-BOUND LATITUDE: 7.241700 * EAST-BOUND LONGITUDE: 165.031700 * DATE/TIME START: 1978-05-28T00:00:00 * DATE/TIME END: 1978-06-09T00:00:00 |
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| Data(s) |
02/10/1981
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| Resumo |
40Ar-39Ar step-heating dating was applied to a basalt from Hole 462 and to basalt and dolerite samples from Hole 462A. Only a basalt sample at Hole 462A yielded a reasonable isochron age, 110 ± 3 million years. The radiometric age is consistent with the fossil record (Cenomanian) in the sediments, into which the basalt sill intruded. However, the age is much less than that of the oceanic basement as deduced from the magnetic anomaly (M-26). |
| Formato |
application/zip, 2 datasets |
| Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.819947 doi:10.1594/PANGAEA.819947 |
| Idioma(s) |
en |
| Publicador |
PANGAEA |
| Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
| Fonte |
Supplement to: Ozima, Minoru; Saito, K; Takigami, Yutaka (1981): 40Ar-39Ar geochronological studies on rocks drilled at Holes 462 and 462A, Deep Sea Drilling Project Leg 61. In: Larson, RL; Schlanger, SO; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 61, 701-703, doi:10.2973/dsdp.proc.61.128.1981 |
| Palavras-Chave | #-; 37Ar/36Ar; 37Ar/36Ar e rel; 39Ar; 39Ar/36Ar; 39Ar/36Ar e rel; 40Ar/36Ar; 40Ar/36Ar e rel; 61-462; 61-462A; Age, dated; Age, dated standard deviation; Age dated; Age std dev; Apparent; # = about; Apparent; # = about; 1 sigma; Argon-37/Argon-36; Argon-37/Argon-36, error, relative; Argon-39; Argon-39/Argon-36; Argon-39/Argon-36, error, relative; Argon-40/Argon-36; Argon-40/Argon-36, error, relative; Comment; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Event; Fusion; Glomar Challenger; Isocrhon age; MSUM = SUMS/N-2. N = number of fractions (Brooks et al., 1972).; J; Label; Leg61; ODP sample designation; Plateau age; Only for the fusion fraction, which constitutes more than 80% of the 39Ar released; Rock; Rock type; Sample code/label; see reference(s); Temperature, technical; Total fusion age = 1/lambda ln [1 + J(40Ar/39Ar)total]* (40Ar/39Ar)total = Sum-fi (40Ar/39Ar)i*fi = 39Ar fraction released; T tech |
| Tipo |
Dataset |
