/* DATA DESCRIPTION:
Citation:	Melson, William G; O'Hearn, Timothy; Fredriksson, Kurt (1988): Spherules and basement analyses from DSDP Hole 5-32 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.760741, 
	Supplement to: Melson, WG et al. (1988): Composition and origin of basaltic glass spherules in pelagic clay from the eastern Pacific. Marine Geology, 83(1-4), 253-271, https://doi.org/10.1016/0025-3227(88)90061-8
Abstract:	Lower Miocene basaltic glass spherules from DSDP Site 32 pelagic sediments in the eastern Pacific are compositionally diverse, and new analyses and interpretations have been added to those of earlier workers. The spherules are of titanian ferrobasalt which is compositionally similar to highly evolved abyssal basalts and to some oceanic island eruptives, and they were most likely shaped during intense lava fountaining during a number of separate eruptions. These eruptions tapped distinct but related magma batches in terms, for example, of distinctively high TiO2 and FeO* contents. Their age overlaps that of some of the eruptions of the Columbia River Plateau Basalts, but they are compositionally distinct from most of the latter basalts. Although about 15 m.y. old, they show little alteration. The low chlorine and sulfur contents compared to those of abyssal ferrobasalts are consistent with degassing prior to quenching during subaerial eruptions, and rule out production of the spherules by submarine fountaining. Lava fountaining alone is insufficient to account for the distance of about 100 km from even the closest possible seamount source. Instead, large phreatomagmatic eruption columns reaching at least 15 km and including lava fountaining immediately after the initial explosion are required. Alternatively, and deemed less likely, is their deposition by turbidites derived from Pioneer Seamount.
Project(s):	Deep Sea Drilling Project (DSDP) (URI: http://www.deepseadrilling.org/)
Coverage:	LATITUDE: 37.127200 * LONGITUDE: -127.556300
	DATE/TIME START: 1969-04-15T00:00:00 * DATE/TIME END: 1969-04-15T00:00:00
Event(s):	5-32 * LATITUDE: 37.127200 * LONGITUDE: -127.556300 * DATE/TIME: 1969-04-15T00:00:00 * ELEVATION: -4758.0 m * Penetration: 215 m * Recovery: 85.9 m * LOCATION: North Pacific/PLAIN * CAMPAIGN: Leg5 (URI: https://doi.org/10.2973/dsdp.proc.5.1970) * BASIS: Glomar Challenger (URI: https://www-odp.tamu.edu:443/glomar.html) * METHOD/DEVICE: Drilling/drill rig (DRILL) * COMMENT: 13 cores; 104 m cored; 9 m drilled; 82.6 % 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
5-32_basement.tab	Melson, William G; O'Hearn, Timothy; Fredriksson, Kurt (1988): (Table 3) Basement analyses from DSDP Hole 5-32. https://doi.org/10.1594/PANGAEA.760731
5-32_glassy_objects.tab	Melson, William G; O'Hearn, Timothy; Fredriksson, Kurt (1988): (Table 2) Stratigraphic locations for glassy objects in DSDP Hole 5-32. https://doi.org/10.1594/PANGAEA.760718
5-32_spherules.tab	Melson, William G; O'Hearn, Timothy; Fredriksson, Kurt (1988): (Table 3) Spherules analyses from DSDP Hole 5-32. https://doi.org/10.1594/PANGAEA.760721
