Park Volcanics, Murihiku Terrane, New Zealand: Petrology, petrochemistry, and tectonic significance

Coombs, D. S.; Cook, Nick; Kawachi, Yousuke; Johnstone, R. D.; Gibson, Lisa

doi:10.1080/00288306.1996.9514727

Cited by 24 publications

(12 citation statements)

References 38 publications

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“…At Mataura Island, Southland, there is a Late Permian inlier (Kuriwao Group;Waterhouse 1964;Campbell et al 2001), but more generally, exposed sections of Murihiku Supergroup fall in the range Early Triassic to Late Jurassic (and Early Cretaceous in drillhole sections in the far north; Isaac et al 1994). Discrete volcanic horizons, either extrusive or intrusive, are surprisingly restricted (mainly Late Triassic; Gabites 1983;Coombs et al 1992Coombs et al , 1996Graham et al 1993). Paleomagnetic studies of these suggest an original mid-latitude position (Grindley et al 1981), but this conclusion does not have the benefit of a satisfactory fold test.…”

Section: Geological Outlinementioning

confidence: 94%

“…They are all mostly of volcanic origin, comprising some volcanic rocks but mainly volcaniclastic sedimentary rocks (e.g., Takitimu Group, Brook Street Terrane, and Murihiku Supergroup, Murihiku Terrane). These accumulated in a back-arc setting (Coombs et al 1996) rather than the forearc setting originally proposed by Coombs et al (1976). There are Late Permian sandstone, siltstone, and calcareous sequences in Brook Street and Dun Mountain-Maitai Terranes .…”

Section: Geological Outlinementioning

confidence: 97%

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Provenance of Permian‐Triassic volcaniclastic sedimentary terranes in New Zealand: Evidence from their radiogenic isotope characteristics and detrital mineral age patterns

Adams

Barley

Maas

et al. 2002

New Zealand Journal of Geology and Geophysics

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Detrital mineral age patterns, Rb-Sr age, and initial strontium isotope ratio variations are reported for metasediments of the Brook Street, Dun Mountain-Maitai, and Murihiku Terranes (informally grouped as "central arc terranes") of New Zealand. U-Pb SHRIMP detrital zircon age populations in Late Permian Tramway Formation, sandstones of the Dun Mountain-Maitai Terrane in Nelson and Southland, New Zealand, show restricted Late Permian (253-268 Ma) and broader Devonian-Carboniferous (330-373 Ma) age components in about equal proportions, with a minor (<20%) proportion of early Paleozoic and Mesoproterozoic ages. The Permian component is related to contemporaneous volcanic inputs, whereas the older Devonian-Carboniferous component is derived from a mixture of exhumed continental crust of Lachlan Fold Belt, and possibly New England Fold Belt age characteristics. A detrital zircon age population of Jurassic Barretts Formation sandstone of the Brook Street Terrane in Wairaki valley, Southland, carries a major (75%), dominantly Middle Jurassic to Late Triassic (170-230 Ma) component derived from contemporary volcanic inputs of uncertain origin, and a minor (<25%) Middle Triassic to Late Permian (229-254 Ma) component. Rb-Sr isochron ages (t) of Brook Street, DunMountain-Maitai, and Murihiku Terrane metasediments (and their initial 87 Sr/ 86 Sr ratios (i) at the time of metamorphism), reveal cooling age patterns consequent upon low-grade metamorphism in latest Triassic and earliest Jurassic times. The (t)-(i) data define a central arc terranes group consistently less radiogenic than Permian and Triassic time correlatives in the Torlesse Supergroup of the Rakaia Terrane. This feature suggests a provenance that includes sediment detritus dominantly from less radiogenic I-type igneous sources in both Lachlan and New England Fold Belts in similar proportions, and with little contribution from their Precambrian and early Paleozoic hinterlands.

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Section: Geological Outlinementioning

confidence: 94%

Section: Geological Outlinementioning

confidence: 97%

Provenance of Permian‐Triassic volcaniclastic sedimentary terranes in New Zealand: Evidence from their radiogenic isotope characteristics and detrital mineral age patterns

Adams

Barley

Maas

et al. 2002

New Zealand Journal of Geology and Geophysics

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“…The Brook Street Terrane is dominated by basaltic-andesitic volcanic and volcaniclastic rocks, but plutonic rocks locally intrude them (Wood 1966;Mossman 1973;Houghton 1986; in press a; Landis et al 1999). The thick volcanogenic sequences of the Murihiku Terrane represent near-arc basin deposits (Blake et al 1974;Ballance & Campbell 1993), possibly associated with igneous activity represented by the rocks which dominate the MTZ (Kimbrough et al 1994;Coombs et al 1976Coombs et al , 1996.…”

Section: Introductionmentioning

confidence: 99%

Relationships between the brook street Terrane and Median Tectonic Zone (Median Batholith): Evidence from Jurassic conglomerates

Tulloch

Kimbrough

Landis

et al. 1999

New Zealand Journal of Geology and Geophysics

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“…1). An alternative possibility has been suggested by Coombs et al (1996) that the Murihiku Terrane was deposited in a backarc setting above an eastwarddipping subduction zone, based on minor coeval high-K volcanic suites (the Park Volcanics Group; Coombs et al 1992) that crop out in the Southland and Nelson segments, but not in the North Island. High-K suites are typically found in backarc environments and hence are unlikely to be the source of sediments in a forearc basin.…”

Section: Discussionmentioning

confidence: 99%

“…High-K suites are typically found in backarc environments and hence are unlikely to be the source of sediments in a forearc basin. Coombs et al (1996) also pointed out that the broad open synclinal folding of the thick pile of Murihiku sediments in Southland and Kawhia is remarkably intact and little deformed for a long-lived (at least 80 m.y.) forearc basin, which would have been expected to have undergone complex folding, thrusting, and imbrication during active plate convergence.…”

Section: Discussionmentioning

confidence: 99%

Provenance history of a Late Triassic‐Jurassic Gondwana margin forearc basin, Murihiku Terrane, North Island, New Zealand: Petrographic and geochemical constraints

Briggs

Middleton

Nelson

2004

New Zealand Journal of Geology and Geophysics

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The Murihiku Terrane in the North Island was a forearc basin adjacent to a volcanic arc along the eastern margin of Gondwana during the Mesozoic. The rocks that infill the basin are mainly volcaniclastic sandstones and mudstones, often turbiditic, with sparse shellbeds, rhyolitic tuffs, carbonaceous sandstones, plant beds, concretionary horizons, and rare thick granitoid-rich conglomerates. Petrographic studies of the rock fragments in the sandstones show that andesites are the dominant lithic type, but there is a wide range of other lithologies, including dacites, rhyolites, ignimbrites, granitoids, quartzofeldspathic mica schists, rare amphibolites, and reworked mudstones and sandstones. The sandstones are texturally and mineralogically immature and suggest deposition relatively close to a source of high relief, undergoing physical rather than chemical weathering in cool-to cold-temperate conditions. Geochemical analyses of 67 whole-rock volcaniclastic sandstones and siltstones indicate that they were derived from an active and dissected volcanic arc in a convergent margin setting built upon relatively thin continental crust. Modal petrographic data and whole-rock geochemistry both confirm that there were systematic variations with time in the composition of clastic material being supplied to the basin. From the Late Triassic to Middle Jurassic, there was a decrease in silicic volcanic material, plutonics, and metamorphics, and an increase in the supply of andesitic detritus. This was followed in the Late Jurassic by a broader range of volcanic detritus, varying from basaltic andesite to rhyolite, which may have been caused by progressive extension of the volcanic arc and thinning of the crust, a precursor to the breakup of Gondwana in the Early-Middle Cretaceous. Comparison with the Southland segment of the Murihiku Terrane in the South Island suggests that there were significant along-arc source variations, with relatively less silicic but greater andesitic and continental crust contributions in the North Island than in Southland. This may be analogous to the modern Taupo-Kermadec arc where there is a south-north along-arc transition from a continental to an oceanic arc.

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Park Volcanics, Murihiku Terrane, New Zealand: Petrology, petrochemistry, and tectonic significance

Cited by 24 publications

References 38 publications

Provenance of Permian‐Triassic volcaniclastic sedimentary terranes in New Zealand: Evidence from their radiogenic isotope characteristics and detrital mineral age patterns

Provenance of Permian‐Triassic volcaniclastic sedimentary terranes in New Zealand: Evidence from their radiogenic isotope characteristics and detrital mineral age patterns

Relationships between the brook street Terrane and Median Tectonic Zone (Median Batholith): Evidence from Jurassic conglomerates

Provenance history of a Late Triassic‐Jurassic Gondwana margin forearc basin, Murihiku Terrane, North Island, New Zealand: Petrographic and geochemical constraints

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