Articles | Volume 26
Workshop report
02 Dec 2019
Workshop report |  | 02 Dec 2019

Workshop report on hard-rock drilling into mid-Cretaceous Pacific oceanic crust on the Hawaiian North Arch

Tomoaki Morishita, Susumu Umino, Jun-Ichi Kimura, Mikiya Yamashita, Shigeaki Ono, Katsuyoshi Michibayashi, Masako Tominaga, Frieder Klein, and Michael O. Garcia

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Cited articles

Alt, J. C., Laverne, C., Vanko, D. A., Tartarotti, P., Teagle, D. A. H., Bach, W., Zuleger, E., Erzinger, J., Honnorez, J., Pezard, P. A., Becker, K., Salisbury, M. H., and Wilkens, R. H.: Hydrothermal alteration of a section of upper oceanic crust in the Eastern Equatorial Pacific: A synthesis of results from site 504 (DSDP Legs 69, 70, and 83, and ODP Legs 111, 137, 140, and 148), in: Proc. ODP, Sci. Results, edited by: Alt, J. C., Kinoshita, H., Stokking, L. B., and Michael, P. J., 148, 417–434, Ocean Drilling Program, College Station, TX, USA, 1996. 
Alt, J. C., Laverne, C., Coggon, R. M., Teagle, D. A. H., Banerjee, N. R., Morgan, S., Smith-Duque, C. E., Harris, M., and Galli, L.: Subsurface structure of a submarine hydrothermal system in ocean crust formed at the East Pacific Rise, ODP/IODP Site 1256, Geochem. Geophy. Geosy., 11,, 2010. 
Ayadi, M., Pezard, P. A., Laverne, C., and Bronner, G.: Multi-scalar structure at DSDP/ODP Site 504, Costa Rica Rift, I: stratigraphy of eruptive products and accretion processes, Geol. Soc. London, Spec. Publ., 136, 297–310,, 1998. 
Ballmer, M. D., Ito, G., Van Hunen, J., and Tackley, P. J.: Spatial and temporal variability in Hawaiian hotspot volcanism induced by small-scale convection, Nat. Geosci., 4, 457–460,, 2011. 
Bianco, T. A., Ito, G., Becker, J. M., and Garcia, M. O.: Secondary Hawaiian volcanism formed by flexural arch decompression, Geochem. Geophy. Geosy., 6,, 2005. 
Short summary
The architecture, formation, and modification of oceanic plates are fundamental to our of understanding key geologic processes of the Earth. Geophysical surveys were conducted around a site near the Hawaiian Islands (northeastern Hawaiian North Arch region). This workshop report describes scientific targets for 2 km deep ocean drilling in the Hawaiian North Arch region in order to provide information about the lower crust from unrecovered age and spreading rate gaps in previous ocean drillings.