Chemical composition, characteristics and age of glauconites at DSDP Leg 66 Holes

Autoria(s): Odin, G S; Stephan, J F
Cobertura

MEDIAN LATITUDE: 16.201792 * MEDIAN LONGITUDE: -99.007337 * SOUTH-BOUND LATITUDE: 16.078800 * WEST-BOUND LONGITUDE: -99.056500 * NORTH-BOUND LATITUDE: 16.269800 * EAST-BOUND LONGITUDE: -98.945300 * DATE/TIME START: 1979-04-03T00:00:00 * DATE/TIME END: 1979-04-20T00:00:00
Data(s)

02/08/1982
Resumo

During the analysis of "glaucony" recovered during Leg 66, off Mexico, we reviewed the data on previously studied glaucony layers in active margin areas. We found the depth of Leg 66 glaucony sediments to be significantly greater than conventionally assumed appropriate to their genesis (100-500 m). Accordingly, we hypothesize their occurrence at unusual depth to be due to (1) transport of shallow sediments and redeposition at greater depths, (2) margin subsidence, or (3) genesis at greater depth than is generally assumed. For the area off Mexico, we reject (1). (2) has already been verified in Japan and is possible as an explanation for the present phenomenon without excluding (3), which we investigate in this chapter.
Formato

application/zip, 4 datasets
Identificador

https://doi.pangaea.de/10.1594/PANGAEA.817579

doi:10.1594/PANGAEA.817579
Idioma(s)

en
Publicador

PANGAEA
Direitos

CC-BY: Creative Commons Attribution 3.0 Unported

Access constraints: unrestricted
Fonte

Supplement to: Odin, G S; Stephan, J F (1982): The occurrence of deep water glaucony from the Eastern Pacific: The result of in situ genesis or subsidence? In: Watkins, JS; Casey Moore, J; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 66, 419-428, doi:10.2973/dsdp.proc.66.110.1982
Palavras-Chave #- ; at 105 °C; +; <1 = rare; <1 = trace; 40Ar; 40Ar(rad)/40Ar(tot); 66-489; 66-489A; 66-490; 66-492; 66-492A; A = grain size 0.16-0.50 mm (generally the main fraction); H = attractable at 0.45 Å at the magnetic; A = grain size 0.16-0.50 mm (generally the main fraction); H = attractable at 0.45 Å at the magnetic separaton; A = grain size 0.16-0.50 mm (generally the main fraction); H = attractable at 0.45 Å at the magnetic separator; L = nonattractable at 0.45 Å but attractable at 0.5 Å; A = grain size 0.16-0.50 mm (generally the main fraction). B = 0.10-0.16 mm; H = attractable at 0.45 Å at the magnetic separator; L = nonattractable at 0.45 Å but attractable at 0.5 Å; Age, dated; Age, dated standard deviation; Age dated; Age std dev; Al2O3; Aluminium oxide; Analyses were done by M. Lenoble; Argon analyses were done by M. G. Bonhomme, Université de Strasbourg; Argon-40; Argon-40, radiogenic/Argon-40, total; Calcium oxide; CaO; Comment; Deep Sea Drilling Project; Depth; DEPTH, sediment/rock; Description; DRILL; Drilling/drill rig; DSDP; Event; Fe2O3; FeO; Foram; Foraminifera; Glauconite; Glomar Challenger; Glt; H2O; Initial; Iron oxide, Fe2O3; Iron oxide, FeO; K; K2O; Label; Leg66; Magnesium oxide; Manganese oxide; MgO; MnO; Na2O; North Pacific/SLOPE; North Pacific/TRANSITION ZONE; North Pacific/TRENCH; ODP sample designation; P2O5; Phosphorus oxide; Potassium; Potassium oxide; Radiogenic; Sample code/label; Sample method; Samp method; Silicon dioxide; SiO2; Sodium oxide; Substrate; Substrate type; The apparent age of the detrital clay fraction is inherited and is probably similar to that of the initial substrate of glauconitization. The apparent ages of the glauconies demonstrate once more the presence of part of the initial radiogenic argon as it might have been foreseen from their level of evolution. The apparent ages cannot be related to the epoch of genesis.; TiO2; Titanium oxide; Total; Water in rock
Tipo

Dataset
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