Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Shibata, Tsugio; DeLong, Stephen E; Lyman, Peter (1981): Petrographic and chemical characteristics of abyssal tholeiites at DSDP Leg 63 Holes [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.819290, Supplement to: Shibata, T et al. (1981): Petrographic and chemical characteristics of abyssal tholeiites from Deep Sea Drilling Project Leg 63 off Baja California. In: Yeats, RS; Haq, BU; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 63, 687-699, https://doi.org/10.2973/dsdp.proc.63.125.1981

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Tholeiitic basalts were obtained from basaltic basement ranging in age from 6 to 17 m.y. on IPOD/DSDP Leg 63. The main rock types encountered at all sites but 473 are basaltic pillow lavas. Although many of these pillow basalts are highly or moderately altered, fresh glass is usually present. At Site 473, we recovered coarse-grained, massive basalts; no clearly defined pillowed forms were observed. Phenocrysts or microphenocrysts present in the Leg 63 basalts are Plagioclase and clinopyroxene at Site 469; olivine, Plagioclase, and spinel at Site 470; and olivine, Plagioclase, and clinopyroxene at Sites 472 and 473. Olivines of the basalts from Holes 470A and 472 (Fo85-88) are generally more magnesian than those of the Hole 473 basalts (Fo77-81). Also, plagioclases of Holes 470A and 472 basalts (An70-85) are generally more calcic than those of Holes 469 and 473 basalts (An66-72).
Geochemical study of the Leg 63 basalts indicates that in all cases they are large-ion-lithophile (LIL) element depleted tholeiites like typical abyssal tholeiites. In particular, they are very similar in composition to those described from the eastern Pacific, although the degree of iron enrichment found in the Leg 63 basalts is not as extensive as in basalts from the Galapagos spreading center. Hence, the geochemical evidence of the Leg 63 basalts is compatible with their formation at a spreading center. Compositional variations in Leg 63 basalts from any single drill hole is small. Major and trace element data indicate that the samples from Holes 469 and 473 are more fractionated in chemical composition than are the samples from Holes 470A and 472; this compositional variation may be largely ascribed to differences in the extent of shallow-level fractional crystallization of similar parental magma. The Hole 472 samples, however, show a LIL element character distinct from the other Leg 63 samples.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 26.620308 * Median Longitude: -114.426494 * South-bound Latitude: 20.965300 * West-bound Longitude: -120.548300 * North-bound Latitude: 32.616700 * East-bound Longitude: -107.063500
Date/Time Start: 1978-10-27T00:00:00 * Date/Time End: 1978-11-22T00:00:00
Event(s):
63-469 * Latitude: 32.616700 * Longitude: -120.548300 * Date/Time: 1978-10-27T00:00:00 * Elevation: -3790.0 m * Penetration: 453.5 m * Recovery: 170.2 m * Location: North Pacific/ESCARPMENT * Campaign: Leg63 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 49 cores; 436.5 m cored; 9.5 m drilled; 39 % recovery
63-470A * Latitude: 28.907700 * Longitude: -117.518500 * Date/Time: 1978-11-02T00:00:00 * Elevation: -3549.0 m * Penetration: 215.5 m * Recovery: 48.2 m * Location: North Pacific/ABYSSAL FLOOR * Campaign: Leg63 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 13 cores; 101.5 m cored; 0 m drilled; 47.5 % recovery
63-472 * Latitude: 23.005800 * Longitude: -113.995200 * Date/Time: 1978-11-18T00:00:00 * Elevation: -3831.0 m * Penetration: 137.5 m * Recovery: 65.1 m * Location: North Pacific/PLATEAU * Campaign: Leg63 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 137.5 m cored; 0 m drilled; 47.4 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
8 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text — use the following character encoding:

Datasets listed in this publication series

  1. Shibata, T; DeLong, SE; Lyman, P (1981): (Table 2) Geochemistry of spinel at DSDP Hole 63-470A. https://doi.org/10.1594/PANGAEA.819283
  2. Shibata, T; DeLong, SE; Lyman, P (1981): (Table 9) Geochemistry of basalt glasses at DSDP Leg 63 Holes. https://doi.org/10.1594/PANGAEA.819289
  3. Shibata, T; DeLong, SE; Lyman, P (1981): (Table 3) Geochemistry of clinopyroxene at DSDP Leg 63 Holes. https://doi.org/10.1594/PANGAEA.819284
  4. Shibata, T; DeLong, SE; Lyman, P (1981): (Table 1) Geochemistry of olivine at DSDP Leg 63 Holes. https://doi.org/10.1594/PANGAEA.819282
  5. Shibata, T; DeLong, SE; Lyman, P (1981): (Table 4) Geochemistry of plagioclase at DSDP Leg 63 Holes. https://doi.org/10.1594/PANGAEA.819285
  6. Shibata, T; DeLong, SE; Lyman, P (1981): (Table 6) Major element compositions and norms of basalts at DSDP Leg 63 Holes. https://doi.org/10.1594/PANGAEA.819286
  7. Shibata, T; DeLong, SE; Lyman, P (1981): (Table 8) Brief petrographic descriptions of analyzed samples at DSDP Leg 63 Holes. https://doi.org/10.1594/PANGAEA.819288
  8. Shibata, T; DeLong, SE; Lyman, P (1981): (Table 7) Trace element abundances at DSDP Leg 63 Holes basalts. https://doi.org/10.1594/PANGAEA.819287