/* DATA DESCRIPTION:
Citation:	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
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) (URI: http://www.deepseadrilling.org/)
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 (URI: https://doi.org/10.2973/dsdp.proc.67.1982) * BASIS: Glomar Challenger (URI: https://www-odp.tamu.edu:443/glomar.html) * 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 (URI: https://doi.org/10.2973/dsdp.proc.67.1982) * BASIS: Glomar Challenger (URI: https://www-odp.tamu.edu:443/glomar.html) * 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 (URI: https://doi.org/10.2973/dsdp.proc.67.1982) * BASIS: Glomar Challenger (URI: https://www-odp.tamu.edu:443/glomar.html) * METHOD/DEVICE: Drilling/drill rig (DRILL) * COMMENT: 15 cores; 137.5 m cored; 5 m drilled; 32.6 % recovery
	67-499 * LATITUDE: 12.671000 * LONGITUDE: -90.944800 * DATE/TIME: 1979-06-12T00:00:00 * ELEVATION: -6105.0 m * Penetration: 229 m * Recovery: 118.9 m * LOCATION: North Pacific/TRENCH * CAMPAIGN: Leg67 (URI: https://doi.org/10.2973/dsdp.proc.67.1982) * BASIS: Glomar Challenger (URI: https://www-odp.tamu.edu:443/glomar.html) * METHOD/DEVICE: Drilling/drill rig (DRILL) * COMMENT: 22 cores; 200.5 m cored; 28.5 m drilled; 59.3 % recovery
	67-500 * LATITUDE: 12.689200 * LONGITUDE: -90.941500 * DATE/TIME: 1979-06-18T00:00:00 * ELEVATION: -6094.0 m * Penetration: 165.5 m * Recovery: 73.3 m * LOCATION: North Pacific/TRENCH * CAMPAIGN: Leg67 (URI: https://doi.org/10.2973/dsdp.proc.67.1982) * BASIS: Glomar Challenger (URI: https://www-odp.tamu.edu:443/glomar.html) * METHOD/DEVICE: Drilling/drill rig (DRILL) * COMMENT: 18 cores; 156 m cored; 9.5 m drilled; 47 % recovery
License:	Creative Commons Attribution 3.0 Unported (CC-BY-3.0) (URI: https://creativecommons.org/licenses/by/3.0/)
Size:	3 datasets
*/
/* TABULAR SUMMARY OF DATASETS LISTED IN THIS COLLECTION: */
Filename	Citation of child dataset
Leg67_heavy-minerals_em.tab	Prasad, Sachindra; Hesse, Reinhard (1982): (Table 1) Heavy-mineral analyses for DSDP Leg 67 Holes from electron microprobe. https://doi.org/10.1594/PANGAEA.817250
Leg67_heavy-minerals-pm.tab	Prasad, Sachindra; Hesse, Reinhard (1982): (Table 2) Heavy-minerals for DSDP Leg 67 Holes from petrographic microscope. https://doi.org/10.1594/PANGAEA.817251
Leg67_light-mierals.tab	Prasad, Sachindra; Hesse, Reinhard (1982): (Table 3) Light-minerals for DSDP Leg 67 Holes. https://doi.org/10.1594/PANGAEA.817252
