| Abstract: | A c. 700 km2 area of northern Fiordland (South Island, New Zealand) is described in which Early Cretaceous high-pressure metamorphic rocks and virtually unmetamorphosed plutonic rocks occur. The dominant rocks are orthogneisses developed from synmetamorphic basic-intermediate intrusive complexes, the youngest and most widespread of which is the Early Cretaceous Western Fiordland Orthogneiss (WFO). The latter has undergone granulite facies metamorphism and occurs throughout much of western Fiordland. WFO was emplaced synkinematically in a subduction-related magmatic arc. A collisional event during or immediately following magma emplacement resulted in crustal thickening equivalent to onloading of a 20 km thick section over rocks already buried at mid-crustal depths. This event was responsible for peak load pressures of c. 12-13 kbar. The steeply dipping Surprise Creek Fault juxtaposes high-pressure metamorphic rocks of western and central Fiordland against virtually unmetamorphosed gabbroic rocks of the Early Cretaceous Darran Complex. -from Author |
| Genre: | Article |
| ProdID: | 70016059 |
| Citation Author: | Bradshaw, J. Y. |
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| Citation End Page: | 484 |
| Citation Issue: | 3 |
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| Citation Language: | English |
| Citation Larger Work Title: | New Zealand Journal of Geology and Geophysics |
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| Citation Number Of Pages: | 20 |
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| Citation Publisher: | Taylor and Francis |
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| Citation Search Results Text: | Geology of crystalline rocks of northern Fiordland: details of the granulite facies Western Fiordland Orthogneiss and associated rock units; 1990; Article; Journal; New Zealand Journal of Geology and Geophysics; Bradshaw, J. Y. |
| Citation Start Page: | 465 |
| Citation Volume: | 33 |
| Citation Year: | 1990 |
| Type: | citation/reference |
| Text: | Geology of crystalline rocks of northern Fiordland: details of the granulite facies Western Fiordland Orthogneiss and associated rock units; 1990; Article; Journal; New Zealand Journal of Geology and Geophysics; Bradshaw, J. Y. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1080/00288306.1990.10425702 |
| Date Other: | Mon, 1 Jan 1990 00:00 -0600 |
| Publisher: | Taylor and Francis |
