Miller, D Jay; Kelley, J (2004): Bulk geochemistry, mass change and alteration intensity of basalts from ODP Leg 187 sites and survey dredges [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.780737, Supplement to: Miller, DJ; Kelley, J (2004): Low-temperature alteration of basalt over time: a synthesis of results from Ocean Drilling Program Leg 187. In: Pedersen, RB; Christie, DM; Miller, DJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 187, 1-29, https://doi.org/10.2973/odp.proc.sr.187.206.2004
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Abstract:
Shipboard studies during Ocean Drilling Program Leg 187 (Australian Antarctic Discordance, AAD) suggested that there was no discernible coincidence between the interpreted age of rocks recovered and the intensity of alteration observed. Samples from the oldest sites occupied appeared to exhibit the least overall effects of alteration, and the intensity of alteration varied from site to site. Previous investigations of low-temperature alteration in oceanic basement samples have been restricted by the myopic perspective provided by single drill holes or dredge collections. Combining core samples from Leg 187 and dredge samples from the AAD collection at Oregon State University (USA) offers the unique opportunity to investigate mineral and bulk chemical changes attending alteration of basalt over a range of ages from 0 to 28 Ma. Results of this research indicate that there is a general increase in the intensity of alteration as the basalts age and mosve off axis, but that this relationship is somewhat veiled by the dominating control on alteration intensity dictated by variations in permeability.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -45.467722 * Median Longitude: 129.128388 * South-bound Latitude: -50.200000 * West-bound Longitude: 124.500000 * North-bound Latitude: -41.271510 * East-bound Longitude: 134.998350
Date/Time Start: 1996-01-01T00:00:00 * Date/Time End: 2000-01-06T09:00:00
Event(s):
187-1152A * Latitude: -41.897930 * Longitude: 127.006710 * Date/Time Start: 1999-08-12T23:30:00 * Date/Time End: 1999-11-27T11:15:00 * Elevation: -5055.4 m * Penetration: 11.2 m * Recovery: 0.59 m * Location: Indian Ocean * Campaign: Leg187 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 core; 11.2 m cored; 0 m drilled; 5.3 % recovery
187-1152B * Latitude: -41.897210 * Longitude: 127.007580 * Date/Time Start: 1999-11-27T11:15:00 * Date/Time End: 1999-11-29T00:00:00 * Elevation: -5055.4 m * Penetration: 46.3 m * Recovery: 3.59 m * Location: Indian Ocean * Campaign: Leg187 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 5 cores; 23.7 m cored; 0 m drilled; 15.1 % recovery
187-1153A * Latitude: -41.271510 * Longitude: 129.815130 * Date/Time Start: 1999-11-29T00:00:00 * Date/Time End: 1999-12-01T19:00:00 * Elevation: -5581.4 m * Penetration: 274.9 m * Recovery: 1.77 m * Location: Indian Ocean * Campaign: Leg187 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 1 core; 7.3 m cored; 0 m drilled; 24.2 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets
Download Data
Datasets listed in this publication series
- Miller, DJ; Kelley, J (2004): (Table T2) Bulk rock chemistry of altered basalts from RV Melville and RV Moana Wave survey dredges. https://doi.org/10.1594/PANGAEA.780785
- Miller, DJ; Kelley, J (2004): (Table T2) Bulk rock chemistry of altered basalts from Leg 187 sites. https://doi.org/10.1594/PANGAEA.780732
- Miller, DJ; Kelley, J (2004): (Table T3) Mass change terms, lithology, and alteration intensity of samples from Leg 187 sites. https://doi.org/10.1594/PANGAEA.780736