Index Catalog // ScholarsArchive@OSU

Creator:: Ray, Jyotiranjan S., Mahoney, John J., Duncan, Robert A., Ray, Jyotisankar, Wessel, Paul, and Naar, David F.
Abstract:: The Easter Seamount Chain and Nazca Ridge are two of the most conspicuous volcanic features on the Nazca plate. Many questions about their nature and origin have remained unresolved because of a lack of geochronological and geochemical data for large portions of both chains. New ⁴⁰Ar⁻³⁹Ar incremental heating age determinations...
Resource Type:: Article
Full Text:: Nazca Ridge and Easter Seamount Chain: an �30 Myr Hotspot Record JYOTIRANJAN S. RAY1,2*, JOHN J

Creator:: Konrad, Kevin, Graham, David W., Thornber, Carl R., Duncan, Robert A., Kent, Adam J.R., and Al-Amri, Abdullah M.
Abstract:: Extensive volcanic fields on the western Arabian Plate have erupted intermittently over the last 30 Ma following emplacement of the Afar flood basalts in Ethiopia. In an effort to better understand the origin of this volcanism in western Saudi Arabia, we analyzed ³He/⁴He, and He, CO₂ and trace element concentrations...
Full Text:: Contents lists available at ScienceDirect Lithos j ourna l homepage: www.e lsev ie r .com/ locate / l i

Creator:: VanLaningham, Sam, Duncan, Robert A., and Pisias, Nicklas G.
Abstract:: We use Ar-40-Ar-39 incremental heating to fingerprint bulk fluvial sediment entering the northeast Pacific Ocean, with the long-term intent of tracking sediment source and transport changes from the terrestrial system to the marine environment through time. We show reproducible age spectra from individual rivers accounting for the majority of sediment...
Resource Type:: Article
Full Text:: provenance tool using 40Ar-39Ar incremental heating on fine-grained sediment, J. Geophys. Res., 111, F04014

Creator:: Tegner, Christian and Duncan, Robert A.
Abstract:: Results of ⁴⁰Ar–³⁹Ar Ar dating constrain the age of the submerged volcanic succession, part of the seaward-dip ping reflector sequence of the Southeast Greenland volcanic rifted margin, recovered during Leg 163. At the 3°Ne 6 drilling transect, the fully normally magnetized volcanic units at Holes 989B (Unit 1) and 990A...
Resource Type:: Article
Full Text:: ., Kelemen, P.B., Tegner, C., Kurz, M.D., Blusztajn, J., and Brooks, C.K., 1998. Plume-related, post-breakup

Creator:: Larsen, Lotte M., Pedersen, Asger K., Sorensen, Erik Vest, Watt, W. Stuart, and Duncan, Robert A.
Abstract:: A NE–SW-trending graben at Kap Dalton on the Blosseville Kyst contains an at least 600 m thick succession of Eocene basalt lavas and sediments. The succession has been investigated by new field work, geochemical analysis and radiometric dating by the ⁴⁰Ar-³⁹Ar incremental heating method. The results show that the volcanic...
Resource Type:: Article
Full Text:: , M.D., Blusztajn, J. & Brooks, C.K. 1998: Post-breakup basaltic magmatism along the East Greenland

ScholarsArchive@OSU