A geochemical appraisal of oil seeps from the East Coast Basin, New Zealand

Identification of a Waipawa Formation equivalent in the upper Te Uri Member of the Whangai Formation ‐ implications for depositional history and age

“…5), suggesting a comparable source input. High C30 sterane values from other locations of Paleocene black shale and oils throughout New Zealand have previously been reported (Rogers 1995(Rogers , 1996Rogers et al 1994Rogers et al ,1999Killops et al 2000). Thermal maturity ratios such as C27 and C29 %a(3(3 steranes indicate that both samples are thermally immature for oil generation.…”

“…This methodology has been followed according to previous source rock studies (Rogers 1995;Rogers et al 1999). (Wilson et al 1989) and estimated from combined stratigraphic information at the Angora Stream section (Leckie et al 1992).…”

Iodine as a tracer of organic material: 129I results from gas hydrate systems and fore arc fluids

“…Mud volcanoes and hydrocarbon seeps have also been observed in this area (e.g. Ridd, 1970;Kvenvolden and Pettinga, 1989;Rogers et al, 1999), both on land and off shore. A potential source of hydrocarbons in this region is the Waipawa Formation, a brownish black mudstone of Late Paleocene age.…”

Palynofacies, organic geochemistry and depositional environment of the Tartan Formation (Late Paleocene), a potential source rock in the Great South Basin, New Zealand

“…The geochemical characteristics of the Tartan and Waipawa Formations have previously been dealt with by Moore (1988), Moore et al (1987), Zumberge (1990), Leckie et al (1992Leckie et al ( , 1995, Killops et al (1996Killops et al ( , 1997Killops et al ( , 2000, Cook et al (1999), Rogers et al (1999Rogers et al ( , 2001, Hollis et al (2000Hollis et al ( , 2005aHollis et al ( ,b, 2006 and Hollis and Manzano-Kareah (2005). TOC contents of the Tartan Formation provided by Killops et al (1996Killops et al ( , 1997Killops et al ( , 2000, Cook et al (1999) and Sutherland et al (2002) are based on data obtained predominantly from bulk ctgs samples from the wells Kawau-1A and Pakaha-1.…”