Couture, Rex A (1977): Composition of palygorskite-rich and montmorillonite-rich zeolite-containing sediments from DSDP Sites 164 and 196 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.704664, Supplement to: Couture, RA (1977): Composition and origin of palygorskite-rich and montmorillonite-rich zeolite-containing sediments from the Pacific Ocean. Chemical Geology, 19(1-4), 113-130, https://doi.org/10.1016/0009-2541(77)90009-2
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Abstract:
Cretaceous, Tertiary, and Quaternary sediments from Deep Sea Drilling Project Sites 164 and 196 (13°12' N, 161°31' W and 30°07' N, 148°34' E, respectively) were analyzed for major chemical elements and mineralogy. Sediments from these sites contain large proportions of authigenic minerals: mainly palygorskite, clinoptilolite and chert in the Cretaceous, and montmorillonite, phillipsite and chert in the Tertiary. The montmorillonite-phillipsite assemblage is thought to be derived from volcanic ash or glass, and the palygorskite-clinoptilolite assemblage is thought to be derived by reaction of biogenic silica with volcanic ash or glass or with montmorillonite and phillipsite. Both assemblages have generally moderate Ti/Al ratios, ranging from 0.026 to 0.047, so most of the palygorskite, clinoptilolite, montmorillonite and phillipsite could not be derived in situ from alteration of basaltic material. Plagioclase compositions suggest that the volcanic precursors were silicic or intermediate, but it is also possible that the sediments have been extensively fractionated by redistribution from nearby seamounts.
Available data on other Late Cretaceous sediments in the Pacific were analyzed. Clinoptilolite and chert are present nearly everywhere where palygorskite is abundant; phillipsite is rare where palygorskite is abundant. It is suggested that increased water temperatures during the Cretaceous increased reaction rates and determined the alteration products.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 21.658950 * Median Longitude: 173.529050 * South-bound Latitude: 13.201700 * West-bound Longitude: 148.574800 * North-bound Latitude: 30.116200 * East-bound Longitude: -161.516700
Date/Time Start: 1971-04-06T00:00:00 * Date/Time End: 1971-09-29T00:00:00
Event(s):
17-164 * Latitude: 13.201700 * Longitude: -161.516700 * Date/Time: 1971-04-06T00:00:00 * Elevation: -5485.0 m * Penetration: 274 m * Recovery: 82.6 m * Location: North Pacific Ocean * Campaign: Leg17 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 28 cores; 260 m cored; 0 m drilled; 31.8 % recovery
20-196 * Latitude: 30.116200 * Longitude: 148.574800 * Date/Time: 1971-09-29T00:00:00 * Elevation: -6194.0 m * Penetration: 377 m * Recovery: 10 m * Location: North Pacific/ABYSSAL FLOOR * Campaign: Leg20 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 32 m cored; 8 m drilled; 31.2 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
6 datasets
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Datasets listed in this publication series
- Couture, RA (1977): (Table 1) Description of sediments from DSDP Site 17-164. https://doi.org/10.1594/PANGAEA.704638
- Couture, RA (1977): (Table 1) Description of sediments from DSDP Site 20-196. https://doi.org/10.1594/PANGAEA.704639
- Couture, RA (1977): (Table 2) Chemical composition of sediments from DSDP Site 17-164. https://doi.org/10.1594/PANGAEA.704640
- Couture, RA (1977): (Table 2) Chemical composition of sediments from DSDP Site 20-196. https://doi.org/10.1594/PANGAEA.704641
- Couture, RA (1977): (Table 3) Atomic ratios of sediments from DSDP Site 17-164. https://doi.org/10.1594/PANGAEA.704644
- Couture, RA (1977): (Table 3) Atomic ratios of sediments from DSDP Site 20-196. https://doi.org/10.1594/PANGAEA.704645