Clay mineralogy of carbonate-rich sediments of ODP Leg 101 sites, 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

Hans Füchtbauer
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...
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