Unknown
PANGAEA
In:
Supplement to: Hüggenberg, Holger; Füchtbauer, Hans (1988): Clay minerals and their diagenesis in carbonate-rich sediments (Leg 101, sites 626 and 627). In: Austin, JA Jr.; Schlager, W; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 101, 171-177, https://doi.org/10.2973/odp.proc.sr.101.135.1988
Publication Date:
2024-01-09
Description:
The insoluble residues of samples from ODP Sites 626 and 627 can be subdivided into four groups: (1) illite, 7 A minerals, quartz and feldspar; (2) smectite and zeolite (clinoptilolite); (3) palygorskite and in places sepiolite; and (4) glauconite and pyrite. Whereas group 1 is clearly terrigenous and group 4 authigenic, group 2 is most probably authigenic, as indicated by its abundance in samples with small insoluble residues and its appearance in SEM photographs. Group 3 is authigenic in Albian peritidal dolomite and possibly terrigenous in middle Miocene slumps and debris flows. Smectite crystallinity increases with age. This increase, however, is less pronounced in the Bahamian carbonate-rich samples than in the carbonate-poor silts south of Guatemala (DSDP Leg 84, Sites 569 and 570, the only comparable investigation) as far as can be judged from such a small number of samples.
Keywords:
101-626B; 101-626C; 101-627A; 101-627B; DRILL; Drilling/drill rig; Joides Resolution; Leg101; Ocean Drilling Program; ODP; South Atlantic Ocean
Type:
Dataset
Format:
application/zip, 2 datasets
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