Stagpoole, V.M.; Bland, K.J. (eds) 2010 Pre-conference field trip East Coast reservoirs and tectonics, 9 May 2010, Wellington, New Zealand. Lower Hutt: GNS Science. GNS Science miscellaneous series 31 27 p.
Abstract: The offshore East Coast region is New Zealand’s largest and most prospective gas hydrates province. This field trip offers an amazing transect through part of an uplifted oblique subduction margin and includes Miocene and younger deep-water sedimentary rocks that are similar to offshore strata that host gas hydrates. The tour starts in Wellington, travels northeast through the Wairarapa fore-arc to the coastal township of Castlepoint before returning to Wellington in the afternoon. During the tour the tectonic development of the region is discussed in relation to petroleum systems and reservoir facies development. At Castlepoint we examine deepwater reservoir facies – turbidites and mass flow deposits – that are likely to have hosted gas hydrates in the past. The East Coast region also has a working thermogenic petroleum system. Highlights of the return trip are stops at thermogenic source rock outcrops and a winery visit. If time permits, the tour will also stop at the Wellington Fault crush zone in the Hutt Valley. (auth)