Bohrmann, Gerhard; Stein, Ruediger; Faugeres, Jean-Claude (1989): Chemical composition of clinoptilolite crystals from ODP Hole 108-661A (Table 2) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.667198, Supplement to: Bohrmann, G et al. (1989): Authigenic zeolites and their relation to silica diagenesis in ODP Site 661sediments (Leg 108, Eastern Equatorial Atlantic). Geologische Rundschau, 78(3), 779-792, https://doi.org/10.1007/BF01829322
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Abstract:
At ODP Site 661 from the continental margin of Northwest Africa, authigenic clinoptilolites were investigated in detail. Based on chemical data, crystal size and shape and their intergrowth with associated mineral phases, two types of clinoptilolite (type A and B) occur representing different diagenetic conditions under which the formation of zeolites took place. Clinoptilolite type A was found in a sediment section comprises numerous hiatuses and stratigraphically condensed sediments and could have been formed during early diagenesis. In contrast, clinoptilolite type B was precipitated in Campanian sediments during later diagenesis, after the transformation from opal-A to opal-CT had taken place. At Site 661, the silica source for the authigenesis of both clinoptilolite types is biogenic opal. Volcanic ash material occurs, but in low amounts and thus is not a prerequisite for the formation of clinoptilolite at Site 661.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Latitude: 9.446800 * Longitude: -19.386100
Date/Time Start: 1986-03-17T19:15:00 * Date/Time End: 1986-03-20T19:15:00
Minimum DEPTH, sediment/rock: 94.56 m * Maximum DEPTH, sediment/rock: 206.15 m
Event(s):
108-661A * Latitude: 9.446800 * Longitude: -19.386100 * Date/Time Start: 1986-03-17T19:15:00 * Date/Time End: 1986-03-20T19:15:00 * Elevation: -4023.0 m * Penetration: 296.1 m * Recovery: 234.93 m * Location: South Atlantic Ocean * Campaign: Leg108 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 32 cores; 296.1 m cored; 0 m drilled; 79.3 % recovery
Parameter(s):
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
108 data points