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Pouclet, André; Cadet, Jean-Paul; Fujioka, Kantaro; Bourgois, Jacques (1985): (Table 1) Geochemistry of glass shards at DSDP Leg 84 Holes [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.803890, Supplement to: Pouclet, A et al. (1985): Ash layers from Deep Sea Drilling Project Leg 84: Middle America Trench transect. In: von Heune, R; Aubouin, J; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 84, 609-618, https://doi.org/10.2973/dsdp.proc.84.117.1985

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Published: 1985 (exact date unknown)DOI registered: 2013-01-10

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Abstract:
Three Leg 84 sites provided a good record of explosive volcanism onshore (in Central America). Ash layers and many ashy pods are interbedded in Recent to Oligocene strata. Evidence of the main periods of activity was noted in Recent to upper Pleistocene, Pliocene-Pleistocene, lower Pliocene to upper Miocene, lower Miocene, and upper Oligocene. Noticeable traces of older volcanism were found in upper Eocene strata.
The chemical analyses of glass shards show a dacitic to rhyolitic composition with a low to moderate calc-alkalinity. A preliminary distinction of samples in three geochemical groups according to their K2O/SiO2 contents is done to test a magmatic evolution. Comparisons are made with Leg 67 and on-land data.
Project(s):
Coverage:
Median Latitude: 13.098667 * Median Longitude: -91.010667 * South-bound Latitude: 12.938500 * West-bound Longitude: -91.392800 * North-bound Latitude: 13.285300 * East-bound Longitude: -90.800000
Date/Time Start: 1982-02-08T00:00:00 * Date/Time End: 1982-02-17T00:00:00
Minimum Elevation: -2744.0 m * Maximum Elevation: -1698.0 m
Event(s):
84-568 * Latitude: 13.072200 * Longitude: -90.800000 * Date/Time: 1982-02-08T00:00:00 * Elevation: -2010.0 m * Penetration: 417.7 m * Recovery: 307.6 m * Location: North Pacific/SLOPE * Campaign: Leg84 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 43 cores; 408 m cored; 9.7 m drilled; 75.4 % recovery
84-569 * Latitude: 12.938500 * Longitude: -90.839200 * Date/Time: 1982-02-12T00:00:00 * Elevation: -2744.0 m * Penetration: 250.7 m * Recovery: 134 m * Location: North Pacific/SLOPE * Campaign: Leg84 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 27 cores; 250.7 m cored; 0 m drilled; 53.5 % recovery
84-570 * Latitude: 13.285300 * Longitude: -91.392800 * Date/Time: 1982-02-17T00:00:00 * Elevation: -1698.0 m * Penetration: 401.9 m * Recovery: 164.5 m * Location: North Pacific/SLOPE * Campaign: Leg84 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 40 cores; 382.6 m cored; 19.3 m drilled; 43 % recovery
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEvent
2Latitude of eventLatitude
3Longitude of eventLongitude
4Elevation of eventElevationm
5Sample code/labelSample labelPouclet, AndréDSDP/ODP/IODP sample designation
6EpochEpochPouclet, André
7Petrography descriptionPetrogr descrPouclet, André
8GroupGroupPouclet, AndréMagmatic
9IdentificationIDPouclet, André
10Silicon dioxideSiO2%Pouclet, AndréMicroprobe
11Titanium dioxideTiO2%Pouclet, AndréMicroprobe
12Aluminium oxideAl2O3%Pouclet, AndréMicroprobe
13Iron oxide, FeOFeO%Pouclet, AndréMicroprobeTotal iron
14Manganese oxideMnO%Pouclet, AndréMicroprobe
15Magnesium oxideMgO%Pouclet, AndréMicroprobe
16Calcium oxideCaO%Pouclet, AndréMicroprobe
17Sodium oxideNa2O%Pouclet, AndréMicroprobe
18Potassium oxideK2O%Pouclet, AndréMicroprobe
19Nickel oxideNiO%Pouclet, AndréMicroprobe<1 = trace
20Chromium(III) oxideCr2O3%Pouclet, AndréMicroprobe
21TotalTotal%Pouclet, AndréMicroprobe
Size:
521 data points

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