IEDA Data Rescue Mini-Award: Fiji, Izu, and Endeavour

Sample metadata and geochemical analyses from over 40 years of research in the Fiji Arc, Izu Arc, and the Endeavour segment of the Juan de Fuca Ridge have been compiled by James B. Gill, at the University of California, Santa Cruz. These data have been critical in studies of intra-oceanic arcs and spreading centers.


Documentation of sample metadata are especially important for samples collected on international cruises, where samples are often shared and split, leading to differing names in the literature for the same physical sample. The Data Rescue project has ensured that the data are correct and will be available to future researchers in an easily accessible and well-documented way.


Fiji sample locations

plotted with GeoMapApp


  • SESAR samples (172 samples) [link]
  • Fiji Tonalites dataset in the EarthChem Library [link]
  • Example PetDB data[link] from A variably enriched mantle wedge and contrasting melt types during arc stages following subduction initiation in Fiji and Tonga, Southwest Pacific 
  • Example EarthChem Portal data with IGSN links: [link] from Geochemistry of Vitu Levu, Fiji, and its evolution as an island arc

Izu Arc sample locations

plotted with GeoMapApp

Izu Arc

  • SESAR samples (317 samples) [link]
  • Example EarthChem Portal data: [link] Across arc geochemical trends in the Izu-Bonin Arc: Contributions from the subducting slab

Full resolution Endeavour

sample location map available at the EarthChem Library



As a result of this project, we will link between SESAR sample metadata and IGSNs (International Geo Sample Numbers), publication DOIs, and PetDB and EarthChem Portal data tables, helping IEDA EarthChem users discover and navigate to all available relevant information. Accompanying detailed descriptions of the analytical methods allow users to better evaluate the geochemical analyses.



Related References



  1. Gill, J.B. (1970), Geochemistry of Vitu Levu, Fiji, and its evolution as an island arc, Contrib. Mineral. Petrol. 27, 179-203. doi: 10.1007/BF00385777
  2. Gill, J.B. and W. Compston, (1973), Strontium isotopes in island arc volcanic rocks: Implications for evolution of an interarc basin and remnant arc, The Western Pacific: Island Arcs, Marginal Seas, Geochemistry (Coleman, P.J.), Univ. Australia Press, 483-496.
  3. Gill, J.B., (1976), Composition and age of Lau Basin and Ridge volcanic rocks: Implications for evolution of an interarc basin and remnant arc, Bull. Geol. Soc. Am., 87, 1384-1395. doi: 10.1130/0016-7606(1978)89<1119:CAAOLB>2.0.CO;2
  4. Gill, J.B.,  (1984), Sr-Pb-Nd isotopic evidence that both MORB and OIB sources contribute to oceanic island arc magmas in Fiji, Earth Planet. Sci. Lett. 68, 443-458. doi: 10.1016/0012-821X(84)90129-8
  5. Gill, J.B. (1987), Early Geochemical evolution of an oceanic island arc and backarc: Fiji and the South Fiji Basin, J. Geol, 95, 589-615.
  6. Gill, J.B., P.M. Whelan, (1989), Early rifting of an oceanic island arc (Fiji) produced shoshonitic to tholeiitic basalts, J. Geophys. Res. B94, 4561-4578. doi: 10.1029/JB094iB04p04561
  7. Gill, J.B., J. Whelan, (1989), Postsubduction ocean island alkali basalts in Fiji, J. Geophys. Res. B94, 4579. doi: 10.1029/JB094iB04p04579
  8. Pearce, J.A., P.D. Kempton, J.B. Gill, (2007), Hf-Nd evidence for the origin and distribution of mantle domains in the SW Pacific, Earth Planet. Sci. Lett. 260, 98-114. doi: 10.1016/j.epsl.2007.05.023
  9. Whelan, P.M., J.B. Gill, E. Kollman, R.A. Duncan, R.E. Drake, (1985), Radiometric dating of magmatic stages in Fiji, Geology and Offshore resources of Pacific Island Arcs - Tonga Region (Scholl, D.W., Vallier, T.L.), 415-440.




  1. A. G. Hochstaedter, J. Gill, R. Peters, P. Broughton, P. Holden, and B. Taylor (2001), Across-arc geochemical trends in the Izu-Bonin arc: contributions from the subducting slab. Geophysics, Geochemistry, Geosystems, doi:10.1029/2000GC000105
  2. D. Tollstrup, J. Gill, A. Kent, D. Prinkey, R. Williams, Y. Tamura, O. Ishizuka. (2010), Across-arc geochemical trends in the Izu-Bonin arc: contributions from the subducted slab, revisited. Geochem. Geophys. Geosyst., 11, Q01X10, doi:10.1029/2009GC002847 
  3. A.G.. Hochstaedter, J. Gill, B. Taylor, O. Ishikuka, M. Yuasa, and S. Morita. (2000), Across-arc geochemical trends in the Izu-Bonin arc: constraints on source composition and mantle melting. J. Geophys. Res. 105, 495-512., doi:10.1029/1999JB900125 
  4. A. Hochstaedter, J. Gill, M. Kusakabe, S. Newman, M. Pringle, B. Taylor and P. Fryer. (1990), Volcanism in the Sumisu Rift I: major element, volatile, and stable isotope geochemistry. Earth Planet. Sci. Lett. 100, 179-194.  
  5. A. Hochstaedter, J. Gill and J. Morris. (1990), Volcanism in the Sumisu Rift II: subduction and non-subduction related components. Earth Planet. Sci. Lett. 100, 195-209. 
  6. O. Ishizuka et al. (2003) Fluid-mantle interaction in an intra-oceanic arcs… Earth and Planetary Science Letters, 211, 221-236. doi:10.1016/S0012-821X(03)00201-2
  7. O. Ishizuka et al. (2006) Variation in the mantle sources of the northern Izu arc… J. Volc. Geothermal Res. 156, 266-290. 
  8. S. Machida and Ishii T. (2003) Backarc volcanism along the en-echelon seamounts: The Enpo seasmount chain in the northern Izu-Ogasawara arc, Geochem. Geophys. Geosyt 4(8), 9006, doi:10.1029/2003GC000554
  9. S. Machida et al. (2008) Petrology and geochemistry of cross-chains in the Izu-Bonin back arc... Geochem. Geophys. Geosyt 9(5), Q05002, doi:10.1029/2007GC001641


In Progress.