Prasad, Sachindra; Hesse, Reinhard (1982): (Table 1) Heavy-mineral analyses for DSDP Leg 67 Holes from electron microprobe [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.817250, In 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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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: 12.701000 * Median Longitude: -90.933520 * 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
Minimum Elevation: -6105.0 m * Maximum Elevation: -5472.0 m
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
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | Latitude of event | Latitude | ||||
| 3 | Longitude of event | Longitude | ||||
| 4 | Elevation of event | Elevation | m | |||
| 5 | Sample code/label | Sample label | Prasad, Sachindra | DSDP/ODP/IODP sample designation | ||
| 6 | Orthopyroxene | Opx | % | Prasad, Sachindra | Electron microprobe (EMP) | Mg>Fe |
| 7 | Orthopyroxene | Opx | % | Prasad, Sachindra | Electron microprobe (EMP) | Mg = Fe |
| 8 | Orthopyroxene | Opx | % | Prasad, Sachindra | Electron microprobe (EMP) | Mg<Fe |
| 9 | Orthopyroxene | Opx | % | Prasad, Sachindra | Electron microprobe (EMP) | Total |
| 10 | Clinopyroxene | Cpx | % | Prasad, Sachindra | Electron microprobe (EMP) | Mg>Fe |
| 11 | Clinopyroxene | Cpx | % | Prasad, Sachindra | Electron microprobe (EMP) | Mg = Fe |
| 12 | Clinopyroxene | Cpx | % | Prasad, Sachindra | Electron microprobe (EMP) | Mg<Fe |
| 13 | Clinopyroxene | Cpx | % | Prasad, Sachindra | Electron microprobe (EMP) | Total |
| 14 | Amphibole | Amp | % | Prasad, Sachindra | Electron microprobe (EMP) | |
| 15 | Olivine | Ol | % | Prasad, Sachindra | Electron microprobe (EMP) | |
| 16 | Epidote | Ep | % | Prasad, Sachindra | Electron microprobe (EMP) | |
| 17 | Sphene | Spn | % | Prasad, Sachindra | Electron microprobe (EMP) | |
| 18 | Rutile | Rt | % | Prasad, Sachindra | Electron microprobe (EMP) | |
| 19 | Apatite | Ap | % | Prasad, Sachindra | Electron microprobe (EMP) | |
| 20 | Heavy mineral grains | HM grains | # | Prasad, Sachindra | Electron microprobe (EMP) | |
| 21 | Epoch | Epoch | Prasad, Sachindra |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
425 data points