Pember Diorite-an Early Jurassic intrusion in the Rakaia Terrane, Puketeraki Range, Canterbury, New Zealand

被引：3

作者：

Jongens, Richard ^{[1
]}

Tulloch, Andrew J. ^{[1
]}

Spell, Terry L. ^{[2
]}

Rattenbury, Mark S. ^{[3
]}

Begg, John G. ^{[3
]}

Lyttle, Belinda Smith ^{[1
]}

机构：

[1] GNS Sci, Dunedin 9054, New Zealand

[2] Univ Nevada, Dept Geosci, Las Vegas, NV 89154 USA

[3] GNS Sci, Lower Hutt 5040, New Zealand

来源：

NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS | 2009年 / 52卷 / 01期

关键词：

Jurassic; Puketeraki Range; Canterbury; Rakaia Terrane; Pember Diorite; geochemistry; geochronology; metamorphism; new stratigraphic name; MEDIAN TECTONIC ZONE; SOUTH-ISLAND; TORLESSE SUPERGROUP; ROCKS; VOLCANICS; BATHOLITH;

D O I：

10.1080/00288300909509876

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

Biotite-homblende-augite microdiorite within the Puketeraki Range and Lees Valley of inland North Canterbury forms small stocks and dikes intruding Rakaia Terrane rocks and is here named the Pember Diorite. Geochemically the Pember Diorite has medium to high-K tholeiitic characteristics. Ar-Ar dating of amphibole gives a crystallisation age of 185.6 +/- 3.3 Ma (2 sigma) (Early Jurassic), some c. 25 m.y. younger than the Late Triassic Rakaia Terrane rocks it intrudes. The Pember Diorite has undergone prehnite-pumpellyite facies metamorphism, indicating that at least some of the regional low-grade metamorphism in the Rakaia Terrane is younger than c. 186 Ma.

引用

页码：37 / 42

页数：6

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