Intra-arc transpression in the lower crust and its relationship to magmatism in a Mesozoic magmatic arc

Early Cretaceous dextral transpressional deformation within the Median Batholith, Stewart Island, New Zealand

“…2,3). Ductile deformation and foliation (after Bradshaw 1990;Turnbull & > uruski 1993;Mortimer et al 1999a,b;Allibone & Tulloch 2004;Marcotte et al 2005;Scott et al 2005;Allibone et al 2007;and Allibone, Turnbull and Jongens unpubl. data (Fig.…”

“…Y. Bradshaw 1989J. Y. Bradshaw , 1990Clarke et al 2000;Daczko et al 2001Daczko et al , 2002Klepeis et al 2004;Flowers et al 2005;Marcotte et al 2005). Extension and the development of metamorphic core complexes in NelsonWestland and Fiordland followed between c. 110 and 90 Ma (Gibson et al 1988;Tulloch & Kimbrough 1989;Gibson & Ireland 1995;Hill 1995;Klepeis et al 1999;Spell et al 2000;Scott & Cooper 2006).…”

“…1) (Allibone & Tulloch 1997Walker et al 1998). The nature of this boundary within the Median Batholith has been debated for c. 20+ yr (coombs 1985;Bradshaw 1993;Kimbrough et al 1993Kimbrough et al , 1994Muir et al 1995Muir et al , 1998Mortimer et al 1999a;Hollis et al 2003;Marcotte et al 2005;Wandres & Bradshaw 2005), with autochthonous and allochthonous models being proposed. In Fiordland, structures such as the Grebe and Indecision creek Shear Zones are commonly placed along or near the western side of the Jurassic-cretaceous Darran/Median Suite within the Median Batholith ( Fig.…”

“…In Fiordland, structures such as the Grebe and Indecision creek Shear Zones are commonly placed along or near the western side of the Jurassic-cretaceous Darran/Median Suite within the Median Batholith ( Fig. 1) (e.g., Turner 1937;oliver&coggon 1979;King 1984;Powell 1989Powell ,2006Kimbrough et al 1993Kimbrough et al , 1994Marcotte et al 2005;Scott et al 2005). large-scale transcurrent faulting along this boundary has been inferred to have reduced the width of the Jurassic-cretaceous Darran/ Median Suite on the eastern side of the Median Batholith (Kimbrough et al 1993(Kimbrough et al ,1994.…”

Plutonic rocks of the Median Batholith in eastern and central Fiordland, New Zealand: Field relations, geochemistry, correlation, and nomenclature

“…Early paleozoic metasedimentary rocks and S-type granitoids in the southern part of Fiordland and Stewart island are restricted to the west and south of these structures, respectively. All three structures are part of a regional-scale system of transpressional shear zones active during the Early cretaceous (Marcotte et al 2005;Allibone & Tulloch 2008;Scott 2008). work described here provides new insights into geological relationships across this boundary in the area west of lake Te Anau (Fig.…”