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
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):
Deep Sea Drilling Project (DSDP)
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):
# | 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 | Pouclet, André | DSDP/ODP/IODP sample designation | ||
6 | Epoch | Epoch | Pouclet, André | |||
7 | Petrography description | Petrogr descr | Pouclet, André | |||
8 | Group | Group | Pouclet, André | Magmatic | ||
9 | Identification | ID | Pouclet, André | |||
10 | Silicon dioxide | SiO2 | % | Pouclet, André | Microprobe | |
11 | Titanium dioxide | TiO2 | % | Pouclet, André | Microprobe | |
12 | Aluminium oxide | Al2O3 | % | Pouclet, André | Microprobe | |
13 | Iron oxide, FeO | FeO | % | Pouclet, André | Microprobe | Total iron |
14 | Manganese oxide | MnO | % | Pouclet, André | Microprobe | |
15 | Magnesium oxide | MgO | % | Pouclet, André | Microprobe | |
16 | Calcium oxide | CaO | % | Pouclet, André | Microprobe | |
17 | Sodium oxide | Na2O | % | Pouclet, André | Microprobe | |
18 | Potassium oxide | K2O | % | Pouclet, André | Microprobe | |
19 | Nickel oxide | NiO | % | Pouclet, André | Microprobe | <1 = trace |
20 | Chromium(III) oxide | Cr2O3 | % | Pouclet, André | Microprobe | |
21 | Total | Total | % | Pouclet, André | Microprobe |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
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Datasets with similar metadata
- Hesse, R; Lebel, J; Gieskes, JM (1985): (Table 1) Interstitial water geochemistry at DSDP Leg 84 Holes. https://doi.org/10.1594/PANGAEA.804382
- Helm, R (1985): (Table 4) Refractive indices of colorless glass shards at DSDP Leg 84 holes. https://doi.org/10.1594/PANGAEA.803839
- Bloomer, SH (1985): (Table 5) Geochemistry of orthopyroxene at DSDP Leg 84 Holes. https://doi.org/10.1594/PANGAEA.804002