Geology, Geophysics, Geochemistry, and Deep-Sea Mineral Deposits, FSM: Kordi-Usgs R.V. Farnella Cruise F11-90-cp
Geology, Geophysics, Geochemistry, and Deep-Sea Mineral Deposits, FSM: Kordi-Usgs R.V. Farnella Cruise F11-90-cp (Report). 1992. doi:10.3133/ofr92218. ISSN 0196-1497.
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Abstract: Ifalik Atoll-Tarang Bank and trends east-west. This segment consists of large carbonate(?) banks and atolls and is generally of less than 2500 m water depth. The western third of Caroline Ridge extends from Ifalik Atoll-Tarang Bank to the Yap trench and trends northwestward. This segment consists of a large shallow-water (<2500 m) ridge bounded by, and cut by, narrow troughs that represent strike-slip faults (southern margin; Hamiltonj 1985), normal faults (northern margin; Andrews, 1971), and small spreading basins. Seismic profiles presented here show that both the north and south flanks of Caroline Ridge are block faulted. The origin of the western two-thirds of Caroline Ridge is unknown. West Caroline Ridge was proposed to be a relict island arc by Bracey and Andrews (1974). However, Hamilton (1985) disagreed with their interpretation and speculated that the ridge represents a leaky transform fault that connects the Mussau and Mariana trenches. Perfit and Fornari (1982) called on a combination of leaky transform fault and hot spot volcanism to form the ridge. Hegarty and Weissel (1988) suggested that the western part of Caroline Ridge, as well as Eauripik Rise, formed when a melting anomaly passed beneath the Pacific plate during the late Oligocene. Our work indicates that west Caroline Ridge, Sorol Trough, and associated topographic features may represent an extinct(?)spreading centertransform fault system. Vogt et al. (1976) suggested this possibility in passing, but provided no corroborative evidence. Eauripik Rise may also be an extinct spreading center, one of three in the Caroline Basin, which is located south of Caroline Ridge (Winterer et al., 1971;Erlandson et al., 1976; Mammerickx, 1978). The Yap arc and trench represent an Oligocene(?) and Neogene convergent plate margin, but one that is distinct in many ways from other west anq southwest Pacific arcs (Cole et al., 1960;Johnson et al., 1960;Hawkins and…
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MAG: 202715792 OpenAlex: W202715792
