Abstract
New GLORIA imagery over the complex backarc area of the northern New Hebrides Arc clearly outlines the deeply faulted Jean Charcot Troughs. The troughs are 2400–3000 m deep and are not magmatically active. They appear to be fragmented older crust and are not backarc basins in the usual sense.
Horst and graben structures on the Hazel Holme Fracture Zone (HHFZ) cut obliquely across the trend of the Zone, which therefore is not a simple transform. The enechelon ridges may form a relay, but Y-shaped grabens could be remnant spreading zones, formed earlier in the history of the western part of the North Fiji Basin.
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Johnson, D.P., Maillet, P.C. & Price, R. Regional setting of a complex backarc: New Hebrides Arc, northern Vanatu-eastern Solomon Islands. Geo-Marine Letters 13, 82–89 (1993). https://doi.org/10.1007/BF01204549
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DOI: https://doi.org/10.1007/BF01204549