Marsaglia, Kathleen M; Tazaki, Kazue (1992): Composition of ODP Leg 126 sandstones [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.771545, Supplement to: Marsaglia, KM; Tazaki, K (1992): Diagenetic trends in Leg 126 sandstones. In: Taylor, B; Fujioka, K; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 126, 125-138, https://doi.org/10.2973/odp.proc.sr.126.123.1992
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Abstract:
Early diagenesis in Leg 126 forearc and backarc sands/sandstones is characterized by the dissolution of intermediate to mafic brown glass, the alteration of colorless rhyolitic glass to clay minerals, precipitation of thin clay-mineral rim cements, and minor precipitation of clinoptilolite cements. Later, more intense diagenesis is restricted to Oligocene forearc basin sediments at Sites 787,792, and 793. In these sections, the effects of early diagenesis have been intensified and overprinted by later diagenetic effects including (1) large-scale dissolution of feldspar and pyroxene crystals, (2) further dissolution of vitric components, (3) precipitation of minor carbonate cements, and (4) pervasive, multiple-staged zeolite cementation. Zeolite minerals present include analcite, mordenite, natrolite, heulandite, wairakite, chabazite, erionite, herschelite, and phillipsite. The latest diagenetic events appear to be the minor dissolution of zeolite cements and the precipitation of minor carbonate and potassium feldspar(?) cements. Observed porosity types include primary interparticles; primary intraparticles in vesicular glass and foraminifers; primary interparticles reduced by compaction and cementation; secondary intraparticles produced by dissolution of feldspar, nonopaque heavy minerals, volcanic glass, and foraminifer tests; and secondary interparticles produced by the dissolution of zeolite cements. Within forearc Oligocene sections at Sites 787 and 792, diagenetic effects appear to decrease with depth in the Oligocene section; however, at Site 793 the majority of samples are intensely altered.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 31.375426 * Median Longitude: 140.304144 * South-bound Latitude: 30.916500 * West-bound Longitude: 139.870100 * North-bound Latitude: 32.399800 * East-bound Longitude: 140.888100
Date/Time Start: 1989-04-15T03:15:00 * Date/Time End: 1989-06-17T18:55:00
Event(s):
126-787B * Latitude: 32.375700 * Longitude: 140.749400 * Date/Time Start: 1989-04-24T14:55:00 * Date/Time End: 1989-04-27T12:00:00 * Elevation: -3265.0 m * Penetration: 320.1 m * Recovery: 159.88 m * Location: North Pacific Ocean * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 34 cores; 320.1 m cored; 0 m drilled; 49.9 % recovery
126-788C * Latitude: 30.922000 * Longitude: 140.003800 * Date/Time Start: 1989-05-14T01:20:00 * Date/Time End: 1989-05-15T03:15:00 * Elevation: -1113.0 m * Penetration: 262.5 m * Recovery: 146.15 m * Location: Philippine Sea * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 28 cores; 258.5 m cored; 0 m drilled; 56.5 % recovery
126-788D * Latitude: 30.922000 * Longitude: 140.003800 * Date/Time Start: 1989-04-15T03:15:00 * Date/Time End: 1989-05-16T12:45:00 * Elevation: -1113.0 m * Penetration: 374 m * Recovery: 12.28 m * Location: Philippine Sea * Campaign: Leg126 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 154.4 m cored; 0 m drilled; 8 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Marsaglia, KM; Tazaki, K (1992): (Table 1) Mineral composition of ODP Leg 126 sandstones. https://doi.org/10.1594/PANGAEA.771543
- Marsaglia, KM; Tazaki, K (1992): (Table 2) Petrography of ODP Leg 126 sandstones. https://doi.org/10.1594/PANGAEA.771544