Marsaglia, Kathleen M (2005): Mineralogy and petrographic summary of ODP Leg 198 sites and DSDP Hole 62-463, Shatsky Rise [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.778075, Supplement to: Marsaglia, KM (2005): Sedimentology, petrology, and volcanology of the lower Aptian Oceanic Anoxic Event (OAE1a), Shatsky Rise, north-central Pacific Ocean. In: Bralower, TJ; Premoli Silva, I; Malone, MJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 198, 1-31, https://doi.org/10.2973/odp.proc.sr.198.109.2005
Always quote citation above when using data! You can download the citation in several formats below.
Abstract:
This petrological study of the lower Aptian Oceanic Anoxic Event (OAE1a) focused on the nature of the organic-rich interval as well as the tuffaceous units above and below it. The volcaniclastic debris deposited just prior to the OAE1a is consistent with reactivation of volcanic centers across the Shatsky Rise, concurrent with volcanism on the Ontong Java Plateau. This reactivation may have been responsible for the sub-OAE1a unconformity. Soon after this volcanic pulse, anomalous amounts of organic matter accumulated on the rise, forming a black shale horizon. The complex textures in the organic-rich intervals suggest a history of periodic anoxia, overprinted by bioturbation. Components include pellets, radiolarians, and fish debris. The presence of carbonate-cemented radiolarite under the OAE1a intervals suggests that there has been large-scale remobilization of carbonate in the system, which in turn may explain the absence of calcareous microfossils in the section. The volcanic debris in the overlying tuffaceous interval differs in that it is significantly epiclastic and glauconitic. It was likely derived from an emergent volcanic edifice.
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 31.613562 * Median Longitude: 163.255438 * South-bound Latitude: 21.350200 * West-bound Longitude: 157.297700 * North-bound Latitude: 37.790610 * East-bound Longitude: 174.667800
Date/Time Start: 1978-08-02T00:00:00 * Date/Time End: 2001-10-15T00:30:00
Event(s):
62-463 * Latitude: 21.350200 * Longitude: 174.667800 * Date/Time: 1978-08-02T00:00:00 * Elevation: -2525.0 m * Penetration: 822.5 m * Recovery: 305.5 m * Location: North Pacific/SEAMOUNT * Campaign: Leg62 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 92 cores; 820.5 m cored; 0 m drilled; 37.2 % recovery
198-1207B * Latitude: 37.790610 * Longitude: 162.750880 * Date/Time Start: 2001-09-09T00:15:00 * Date/Time End: 2001-09-13T23:30:00 * Elevation: -3100.7 m * Penetration: 622.8 m * Recovery: 60.22 m * Location: North Pacific Ocean * Campaign: Leg198 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 49 cores; 465.8 m cored; 157 m drilled; 12.9 % recovery
198-1213B * Latitude: 31.577630 * Longitude: 157.297700 * Date/Time Start: 2001-10-04T03:00:00 * Date/Time End: 2001-10-09T19:00:00 * Elevation: -3882.6 m * Penetration: 494.4 m * Recovery: 60.46 m * Location: North Pacific Ocean * Campaign: Leg198 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 33 cores; 304.7 m cored; 189.7 m drilled; 19.8 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
Download Data
Datasets listed in this publication series
- Marsaglia, KM (2005): (Table T2) Bulk and clay fraction mineralogy of ODP holes 198-1207B and 198-1213B. https://doi.org/10.1594/PANGAEA.778074
- Marsaglia, KM (2005): (Table T1) Petrographic summary of thin sections from ODP Leg 198 sites and DSDP Hole 62-463. https://doi.org/10.1594/PANGAEA.778073