Prasad, Sachindra; Hesse, Reinhard (1982): Heavy and light minerals at DSDP Leg 67 Holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.817253, Supplement to: Prasad, S; Hesse, R (1982): Provenance of detrital sediments from the Middle America Trench transect off Guatemala, Deep Sea Drilling Project Leg 67. In: Abouin, J; von Huene, R; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 67, 507-514, https://doi.org/10.2973/dsdp.proc.67.118.1982
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Published: 1982 (exact date unknown) • DOI registered: 2013-08-26
Abstract:
Heavy and light minerals were examined in 29 samples from Sites 494, 498, 499, 500, and 495 on the Deep Sea Drilling Project Leg 67 Middle America Trench transect; these sites represent lower slope, trench, and oceanic crust environments off Guatemala. All samples are Quaternary except those from Hole 494A (Pliocene) and Hole 498A (Miocene). Heavy-mineral assemblages of the Quaternary sediments are characterized by an immature pyroxene-amphibole suite with small quantities of olivine and epidote. The Miocene sediments yielded an assemblage dominated by epidote and pyroxene but lacking olivine; the absence of olivine is attributed to selective removal of the most unstable components by intrastratal solution. Light-mineral assemblages of all samples are predominantly characterized by volcanic glass and plagioclase feldspar. The feldspar compositions are compatible with andesitic source rocks and frequently exhibit oscillatory zoning. The heavy- and light-mineral associations of these sediments suggest a proximal volcanic source, most probably the Neogene highland volcanic province of Guatemala. Sand-sized components from Site 495 are mainly biogenic skeletons and volcanic glass and, in one instance (Section 495-5-3), euhedral crystals of gypsum.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 12.694220 * Median Longitude: -90.934324 * South-bound Latitude: 12.671000 * West-bound Longitude: -90.944800 * North-bound Latitude: 12.716800 * East-bound Longitude: -90.915700
Date/Time Start: 1979-05-17T00:00:00 * Date/Time End: 1979-06-18T00:00:00
Event(s):
67-494 * Latitude: 12.716700 * Longitude: -90.932800 * Date/Time: 1979-05-17T00:00:00 * Elevation: -5472.0 m * Penetration: 37.5 m * Recovery: 31.3 m * Location: North Pacific/TRENCH * Campaign: Leg67 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 4 cores; 37.5 m cored; 0 m drilled; 83.5 % recovery
67-494A * Latitude: 12.716800 * Longitude: -90.932800 * Date/Time: 1979-05-17T00:00:00 * Elevation: -5472.0 m * Penetration: 366.5 m * Recovery: 91.3 m * Location: North Pacific/TRENCH * Campaign: Leg67 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 35 cores; 329 m cored; 0 m drilled; 27.8 % recovery
67-498A * Latitude: 12.711300 * Longitude: -90.915700 * Date/Time: 1979-06-05T00:00:00 * Elevation: -5478.0 m * Penetration: 321.5 m * Recovery: 44.8 m * Location: North Pacific/TRENCH * Campaign: Leg67 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 15 cores; 137.5 m cored; 5 m drilled; 32.6 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
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Datasets listed in this publication series
- Prasad, S; Hesse, R (1982): (Table 1) Heavy-mineral analyses for DSDP Leg 67 Holes from electron microprobe. https://doi.org/10.1594/PANGAEA.817250
- Prasad, S; Hesse, R (1982): (Table 2) Heavy-minerals for DSDP Leg 67 Holes from petrographic microscope. https://doi.org/10.1594/PANGAEA.817251
- Prasad, S; Hesse, R (1982): (Table 3) Light-minerals for DSDP Leg 67 Holes. https://doi.org/10.1594/PANGAEA.817252