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Waiuta Anticline

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Journal Article
Journal: Economic Geology
Published: 01 November 2018
Economic Geology (2018) 113 (7): 1479–1497.
..., brittle-ductile fault that can be traced for 3+ km through the adjacent Greenland Group sandstones and argillites. The reef occupies that part of the fault that is close to parallel with bedding on a relatively gently (~60°) W-dipping segment of the western limb of the Waiuta anticline. The reef pinches...
FIGURES | View All (14)
Image
A. Geologic map of the area surrounding the Birthday reef and the Blackwater mine. Structure contours on the reef illustrate its extent in historic mine workings and deep drill holes. The narrow mineralized fault which hosts the Birthday reef can be traced >3 km along strike from the vicinity of the Homer workings in the south to Blackwater Creek in the north. The reef is developed on the western limb of the Waiuta anticline where bedding and the host fault both strike north-northeast and dip about 75° west-northwest. B. Alternative interpretation of the structure north of the Blackwater mine in which the Prohibition fault has displaced both the hinge of the Waiuta anticline and the mineralized fault that hosts the Birthday reef by 300 to 400 m in an apparent sinistral direction, rather <50 to 100 m as shown in map (A).
Published: 01 November 2018
the vicinity of the Homer workings in the south to Blackwater Creek in the north. The reef is developed on the western limb of the Waiuta anticline where bedding and the host fault both strike north-northeast and dip about 75° west-northwest. B. Alternative interpretation of the structure north
Image
Structural setting of the Birthday reef and more intensely mineralized shoots within the reef. A. Long section of the Birthday reef looking east-southeast, showing the plunge of the both ends of the reef, more intensely mineralized shoots within the reef, and the position and grade of deep drill hole intersections below that part of the reef mined prior to 1951. B. Sketch illustrating the structural setting of the Birthday reef and vein-poor segments of the mineralized fault that hosts the reef, assuming <50- to 100-m displacement across the Prohibition fault. C. The asymmetry of bedding and cleavage change across the discovery outcrop of the reef and its associated shear, implying their position coincides with the hinge of the Waiutu anticline. D. Equal area stereographic projection, showing relationships between the plunge of the Birthday reef and intersections between the reef, bedding in adjacent rocks, and the axial plane of the Waiuta anticline.
Published: 01 November 2018
, bedding in adjacent rocks, and the axial plane of the Waiuta anticline.
Book Chapter

Series: Reviews in Economic Geology
Published: 01 January 2000
DOI: 10.5382/Rev.13.03
EISBN: 9781629490205
..., New Zealand, are host to the Reefton, Lyell, Waiuta, Golden Blocks, and Langdons gold fields. These siliciclastic sediments are inferred to represent lateral equivalents to the turbiditic succession of southeastern Australia and were probably deposited concurrently at the Pacific margin...
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