Geology of crystalline rocks of northern Fiordland: Details of the granulite facies Western Fiordland Orthogneiss and associated rock units
Geology of crystalline rocks of northern Fiordland: Details of the granulite facies Western Fiordland Orthogneiss and associated rock units
复制标题
峡湾北部结晶岩地质：西峡湾正粒麻岩麻粒岩相及相关岩石单元的详细信息
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发表时间：
1990
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通讯作者：
J. Bradshaw
中科院分区：
文献类型：
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作者：
J. Bradshaw
摘要 A c．描述了峡湾北部（新西兰南岛）700平方公里的区域，其中存在早白垩世高压变质岩和几乎未变质的深成岩。主要岩石是由同变质基性-中级侵入杂岩发育而成的正片麻岩，其中最年轻、分布最广泛的是早白垩世西峡湾正片麻岩（WFO）。后者经历了麻粒岩相变质作用，发生在峡湾西部的大部分地区。在研究区，WFO 原岩侵入角闪岩相变沉积岩和正片麻岩围岩。乡村岩石的碎片在 WFO 内漂流，以乔治湾帕拉片麻岩和漂流花岗岩片麻岩为代表。外部乡村岩石以亚瑟河杂岩和锯齿状片麻岩为代表（可能与 Anita Ultramafites 有关）；它还可能包括犹豫溪综合体和阿瑙山综合体。乔治湾帕拉涅斯 (George Sound Paragneiss) 与中部峡湾 (Central Fiordla) 相关……
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. In the study area, the WFO protolith intruded a country rock of amphibolite facies metasediments and orthogneisses. Fragments of the country rock are rafted within WFO and are represented by George Sound Paragneiss and Rafted Granitoid Gneisses. External country rock is represented by Arthur River Complex and Jagged Gneiss (possibly related to the Anita Ultramafites); it may also include Indecision Creek Complex and Mount Anau Complex. The George Sound Paragneiss is correlated with the Central Fiordla...