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Browsing by Author "Koppers, Anthony A. P."

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Browsing by Author "Koppers, Anthony A. P."

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  • Age systematics of two young en echelon Samoan volcanic trails 
    Koppers, Anthony A. P.; Russell, Jamie A.; Roberts, Jed; Jackson, Matthew G.; Konter, Jasper G.; Wright, Dawn J.; Staudigel, Hubert; Hart, Stanley R. (American Geophysical Union, 2011-07-29)
    The volcanic origin of the Samoan archipelago can be explained by one of three models, specifically, by a hot spot forming over a mantle plume, by lithospheric extension resulting from complex subduction tectonics in the ...
  • Defining the word "Seamount" 
    Staudigel, Hubert; Koppers, Anthony A. P.; Lavelle, J. William; Pitcher, Tony J.; Shank, Timothy M. (The Oceanography Society, 2010-03)
    Reading through this issue of Oceanography, it will become apparent that researchers in different disciplines see their seamounts in quite different ways. The term seamount has been defined many times (e.g., Menard, 1 ...
  • Electronic data publication in geochemistry 
    Staudigel, Hubert; Helly, John; Koppers, Anthony A. P.; Shaw, Henry F.; McDonough, William F.; Hofmann, Albrecht W.; Langmuir, Charles H.; Lehnert, Kerstin; Baerbel, Sarbas; Derry, Louis A.; Zindler, Alan (American Geophysical Union, 2003-03-29)
    Many disciplines of geochemistry have no data reporting standards, and their use of metadata is inadequately developed. This presents problems to the quality of the published science, and it limits the utility of compute ...
  • A fluorescein tracer release experiment in the hydrothermally active crater of Vailulu'u volcano, Samoa 
    Hart, Stanley R.; Staudigel, H.; Koppers, Anthony A. P.; Girard, A. P. (American Geophysical Union, 2003-08-14)
    On 3 April 2001, a 20 kg point source of fluorescein dye was released 30 m above the bottom of the active summit caldera of Vailulu’u submarine volcano, Samoa. Vailulu’u crater is 2000 m wide and at water depths of 600 ...
  • High-resolution ⁴⁰Ar/³⁹Ar dating of the oldest oceanic basement basalts in the western Pacific basin 
    Koppers, Anthony A. P.; Staudigel, Hubert; Duncan, Robert A. (American Geophysical Union, 2003-11-25)
    We report new ⁴⁰Ar/³⁹Ar ages for the oldest Pacific oceanic floor at Ocean Drilling Program Site 801C in the Pigafetta basin and Site 1149D close to the Izu-Bonin subduction zone in the Nadezhda basin. These ages were ...
  • Hydrothermal venting at Vailulu'u Seamount: The smoking end of the Samoan chain 
    Staudigel, H.; Hart, Stanley R.; Koppers, Anthony A. P.; Constable, C.; Workman, R.; Kurz, M.; Baker, E. T. (American Geophysical Union, 2004-02-10)
    The summit crater of Vailulu’u Seamount, the youngest volcano in the Samoan chain, hosts an active hydrothermal system with profound impact on the ocean water column inside and around its crater (2 km wide and 407 m de ...
  • Implications of a nonlinear ⁴⁰Ar/³⁹Ar age progression along the Louisville seamount trail for models of fixed and moving hot spots 
    Koppers, Anthony A. P.; Duncan, Robert A.; Steinberger, Bernhard (American Geophysical Union, 2004-06-19)
    The Louisville seamount trail has been recognized as one of the key examples of hot spot volcanism, comparable to the classic volcanic Hawaiian-Emperor lineaments. The published total fusion ⁴⁰Ar/³⁹Ar data of Watts et al ...
  • Intraplate seamounts as a window into deep earth processes 
    Koppers, Anthony A. P.; Watts, Anthony B. (The Oceanography Society, 2010-03)
    Seamounts are windows into the deep Earth that are helping to elucidate various deep Earth processes. For example, thermal and mechanical properties of oceanic lithosphere can be determined from the flexing of oceanic ...
  • Lō'ihi Seamount 
    Staudigel, Hubert; Moyer, Craig L.; Garcia, Michael O.; Malahoff, Alex; Clague, David A.; Koppers, Anthony A. P. (The Oceanography Society, 2010-03)
    Lō`ihi Seamount defines the volcanically active, leading edge in the Hawaiian hotspot chain. It is located on the submarine flank of Mauna Loa, 30 km south of the island of Hawai`i. Lō`ihi’s summit is at 975-m water ...
  • New 40Ar/39Ar age progression for the Louisville hot spot trail and implications for inter–hot spot motion 
    Koppers, Anthony A. P.; Gowen, Molly D.; Colwell, Lauren E.; Gee, Jeffrey S.; Lonsdale, Peter F.; Mahoney, John J.; Duncan, Robert A. (2011-12-30)
    In this study we present 42 new ⁴⁰Ar/³⁹Ar incremental heating age determinations that contribute to an updated age progression for the Louisville seamount trail. Louisville is the South Pacific counterpart to the Hawai ...
  • Paleomagnetism of the southwestern U.S.A. recorded by 0-5 Ma igneous rocks 
    Tauxe, Lisa; Constable, Catherine; Johnson, Catherine L.; Koppers, Anthony A. P.; Miller, Winter R.; Staudigel, Hubert (American Geophysical Union, 2003-04-11)
    The issue of permanent nondipole contributions to the time-averaged field lies at the very heart of paleomagnetism and the study of the ancient geomagnetic field. In this paper we focus on paleomagnetic directional res ...
  • Scalable models of data sharing in Earth sciences 
    Helly, John; Staudigel, Hubert; Koppers, Anthony A. P. (American Geophysical Union, 2003-01-25)
    Many Earth science disciplines are currently experiencing the emergence of new ways of data publication and the establishment of an information technology infrastructure for data archiving and exchange. Building on eff ...
  • Seamount Catalong: Seamount Morphology, Maps, and Data Files 
    Koppers, Anthony A. P.; Staudigel, Hubert; Minnett, Rupert (The Oceanography Society, 2010-03)
    Seamount research, more often than not, is carried out by highly specialized science teams with narrowly focused science objectives. As a result, different seamount science disciplines often do not collaborate or are ...
  • Seamount subduction and earthquakes 
    Watts, Anthony B.; Koppers, Anthony A. P.; Robinson, David P. (The Oceanography Society, 2010-03)
    Seamounts are ubiquitous features of the seafloor that form part of the fabric of oceanic crust. When a seamount enters a subduction zone, it has a major affect on forearc morphology, the uplift history of the island a ...
  • Short-lived and discontinuous intraplate volcanism in the South Pacific: Hot spots or extensional volcanism? 
    Koppers, Anthony A. P.; Staudigel, Hubert; Pringle, Malcom S.; Wijbrans, Jan R. (American Geophysical Union, 2003-10-28)
    South Pacific intraplate volcanoes have been active since the Early Cretaceous. Their HIMU-EMI-EMII mantle sources can be traced back into the West Pacific Seamount Province (WPSP) using plate tectonic reconstructions, i ...
  • Sr-Nd-Pb isotope geochemistry of leg 144 West Pacific guyouts: Implications for the geochemical evolution of the "SOPITA" mantle anomaly 
    Koppers, Anthony A. P.; Staudigel, Hubert; Christie, David M.; Dieu, Julie J.; Pringle, Malcolm S. (Ocean Drilling Program, 1995)
    The Sr, Nd, and Pb isotopic compositions of five Cretaceous guyots (Limalok, Lo-En, Wodejebato, MIT, and Takuyo-Daisan) within the West Pacific Seamount Province (WPSP) indicate that they originated from geochemically en ...
  • Vailulu'u Seamount 
    Koppers, Anthony A. P.; Staudigel, Hubert; Hart, Stanley R.; Young, Craig; Konter, Jasper G. (The Oceanography Society, 2010-03)
    Vailulu’u seamount is an active underwater volcano that marks the end of the Samoan hotspot trail (Hart et al., 2000). Vailulu’u has a simple conical morphology (Figure 1) with a largely enclosed volcanic crater at ...
  • Vailulu'u undersea volcano: The New Samoa 
    Hart, Stanley R.; Staudigel, H.; Koppers, Anthony A. P.; Blusztajn, J.; Baker, E. T.; Workman, R.; Jackson, M.; Hauri, E.; Kurz, M.; Sims, K.; Fornari, D.; Saal, A.; Lyons, S. (American Geophysical Union, 2000-12-08)
    Vailulu'u Seamount is identified as an active volcano marking the current location of the Samoan hotspot. This seamount is located 45 km east of Ta'u Island, Samoa, at 169°03.5′W, 14°12.9′S. Vailulu'u defines the eastern ...
  • Vailulu’u Seamount, Samoa: Life and death on an active submarine volcano 
    Staudigel, Hubert; Hart, Stanley R.; Pile, Adele; Bailey, Bradley E.; Baker, Edward T.; Brooke, Sandra; Connelly, Douglas P.; Haucke, Lisa; German, Christopher R.; Hudson, Ian; Daniel Jones; Koppers, Anthony A. P.; Konter, Jasper; Lee, Ray; Pietsch, Theodore W.; Tebo, Bradley M.; Templeton, Alexis S.; Zierenberg, Robert; Young, Craig M. (The National Academy of Sciences of the USA, 2006-04-25)
    Submersible exploration of the Samoan hotspot revealed a new, 300-m-tall, volcanic cone, named Nafanua, in the summit crater of Vailulu’u seamount. Nafanua grew from the 1,000-m-deep crater floor in <4 years and could ...

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