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Wood, D A; Marsh, Nicholas G; Tarney, J; Joron, Jean Louis; Fryer, Patricia B; Treuil, M (1982): Geochemistry of igneous rocks recovered from a transect across the Mariana Trough, arc, fore-arc, and trench, at DSDP Leg 60 Holes and DM17 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.820175, Supplement to: Wood, DA et al. (1982): Geochemistry of igneous rocks recovered from a transect across the Mariana Trough, arc, fore-arc, and trench, Sites 453 through 461, Deep Sea Drilling Project Leg 60. In: Hussong, DM; Uyeda, S; et al. (eds.), Initial Reports of the Deep Sea Drilling Project (U.S. Govt. Printing Office), 60, 611-645, https://doi.org/10.2973/dsdp.proc.60.133.1982

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Abstract:
Major and trace element analyses are presented for 110 samples from the DSDP Leg 60 basement cores drilled along a transect across the Mariana Trough, arc, fore-arc, and Trench at about 18°N. The igneous rocks forming breccias at Site 453 in the west Mariana Trough include plutonic cumulates and basalts with calc-alkaline affinities. Basalts recovered from Sites 454 and 456 in the Mariana Trough include types with compositions similar to normal MORB and types with calc-alkaline affinities within a single hole. At Site 454 the basalts show a complete compositional transition between normal MORB and calc-alkaline basalts. These basalts may be the result of mixing of the two magma types in small sub-crustal magma reservoirs or assimilation of calc-alkaline, arc-derived vitric tuffs by normal MORB magmas during eruption or intrusion.
A basaltic andesite clast in the breccia recovered from Site 457 on the active Mariana arc and samples dredged from a seamount in the Mariana arc are calc-alkaline and similar in composition to the basalts recovered from the Mariana Trough and West Mariana Ridge. Primitive island arc tholeiites were recovered from all four sites (Sites 458-461) drilled on the fore-arc and arc-side wall of the trench. These basalts form a coherent compositional group distinct from the Mariana arc, West Mariana arc, and Mariana Trough calc-alkaline lavas, indicating temporal (and perhaps spatial?) chemical variations in the arc magmas erupted along the transect.
Much of the 209 meters of basement cored at Site 458 consists of endiopside- and bronzite-bearing, Mg-rich andesites with compositions related to boninites. These andesites have the very low Ti, Zr, Ti/Zr, P, and rare-earthelement contents characteristic of boninites, although they are slightly light-rare-earth-depleted and have lower MgO, Cr, Ni, and higher CaO and Al2O3 contents than those reported for typical boninites. The large variations in chemistry observed in the lavas recovered from this transect suggest that diverse mantle source compositions and complex petrogenetic process are involved in forming crustal rocks at this intra-oceanic active plate margin.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: 18.691538 * Median Longitude: 145.311781 * South-bound Latitude: 17.667000 * West-bound Longitude: 143.450000 * North-bound Latitude: 21.950000 * East-bound Longitude: 147.687700
Date/Time Start: 1978-03-28T00:00:00 * Date/Time End: 1978-05-09T00:00:00
Event(s):
60-453 * Latitude: 17.907000 * Longitude: 143.682500 * Date/Time: 1978-03-28T00:00:00 * Elevation: -4693.0 m * Penetration: 605 m * Recovery: 235.1 m * Location: North Pacific/SEDIMENT POND * Campaign: Leg60 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 63 cores; 595.5 m cored; 9.5 m drilled; 39.5 % recovery
60-454 * Latitude: 18.013000 * Longitude: 144.532000 * Date/Time: 1978-04-05T00:00:00 * Elevation: -3816.0 m * Penetration: 38.5 m * Recovery: 22.5 m * Location: North Pacific/SEDIMENT POND * Campaign: Leg60 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 4 cores; 29 m cored; 9.5 m drilled; 77.6 % recovery
60-454A * Latitude: 18.013000 * Longitude: 144.532000 * Date/Time: 1978-04-05T00:00:00 * Elevation: -3816.0 m * Penetration: 171.5 m * Recovery: 41 m * Location: North Pacific/SEDIMENT POND * Campaign: Leg60 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 16 cores; 142.5 m cored; 9.5 m drilled; 28.8 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
10 datasets

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Datasets listed in this publication series

  1. Wood, DA; Marsh, NG; Tarney, J et al. (1982): (Table 1) Major and trace element analyses of igneous rocks from DSDP Hole 60-453. https://doi.org/10.1594/PANGAEA.820166
  2. Wood, DA; Marsh, NG; Tarney, J et al. (1982): (Table 3) Major and trace element analyses of igneous rocks from DSDP Hole 60-454A. https://doi.org/10.1594/PANGAEA.820167
  3. Wood, DA; Marsh, NG; Tarney, J et al. (1982): (Table 4) Major and trace element analyses of igneous rocks from DSDP Site 60-456. https://doi.org/10.1594/PANGAEA.820168
  4. Wood, DA; Marsh, NG; Tarney, J et al. (1982): (Table 8) Major and trace element analyses of igneous rocks from DSDP Hole 60-458. https://doi.org/10.1594/PANGAEA.820172
  5. Wood, DA; Marsh, NG; Tarney, J et al. (1982): (Table 10) Major and trace element analyses of igneous rocks from DSDP Hole 60-459B. https://doi.org/10.1594/PANGAEA.820173
  6. Wood, DA; Marsh, NG; Tarney, J et al. (1982): (Table 6) Major and trace element analyses of recent basalts and andesites dredged from a seamount in the northern Mariana arc at DM site 17. https://doi.org/10.1594/PANGAEA.820170
  7. Wood, DA; Marsh, NG; Tarney, J et al. (1982): (Table 7) Trace elements of 15 andesites from the Mariana arc DM site 17. https://doi.org/10.1594/PANGAEA.820171
  8. Wood, DA; Marsh, NG; Tarney, J et al. (1982): (Appendix Table 1) Sample descriptions (hand-specimen), at DSPD Leg 60 Holes. https://doi.org/10.1594/PANGAEA.820165
  9. Wood, DA; Marsh, NG; Tarney, J et al. (1982): (Table 11) Representative major and trace element analyses of basement rocks at DSDP Leg 60 Holes. https://doi.org/10.1594/PANGAEA.820174
  10. Wood, DA; Marsh, NG; Tarney, J et al. (1982): (Table 5) Major and trace element analyses of igneous rocks from DSDP Holes 60-457, 60-460 and 60-461. https://doi.org/10.1594/PANGAEA.820169