1987
DOI: 10.1139/e87-004
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LITHOPROBE—southern Vancouver Island: Cenozoic subduction complex imaged by deep seismic reflections

Abstract: The LITHOPROBE seismic reflection project on Vancouver Island was designed to study the large-scale structure of several accreted terranes exposed on the island and to determine the geometry and structural characteristics of the subducting Juan de Fuca plate. In this paper, we interpret two LITHOPROBE profiles from southernmost Vancouver Island that were shot across three important terrane-bounding faults—Leech River, San Juan, and Survey Mountain—to determine their subsurface geometry and relationship to deep… Show more

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Cited by 231 publications
(196 citation statements)
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“…The Cascadia wedge formed outboard of the CRT and has grown by offscraping at the front of the wedge, and possibly underplating beneath the wedge as well [Clowes et al, 1987;Brandon and Calderwood, 1990]. Cascadia wedge sediments underlie most of the offshore continental margin [e.g., Clowes et al, 1987] Brandon and Calderwood [1990] to the presence of a 10-km-high arch in the underlying Juan de Fuca Plate beneath the orogen.…”
Section: Regional Settingmentioning
confidence: 99%
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“…The Cascadia wedge formed outboard of the CRT and has grown by offscraping at the front of the wedge, and possibly underplating beneath the wedge as well [Clowes et al, 1987;Brandon and Calderwood, 1990]. Cascadia wedge sediments underlie most of the offshore continental margin [e.g., Clowes et al, 1987] Brandon and Calderwood [1990] to the presence of a 10-km-high arch in the underlying Juan de Fuca Plate beneath the orogen.…”
Section: Regional Settingmentioning
confidence: 99%
“…Cascadia wedge sediments underlie most of the offshore continental margin [e.g., Clowes et al, 1987] Brandon and Calderwood [1990] to the presence of a 10-km-high arch in the underlying Juan de Fuca Plate beneath the orogen. They argue that the low angle of slab dip beneath the Olympics resulted in a correspondingly early emergence of the region and rapid uplift of the Olympic massif, relative to adjacent regions of the subduction zone (see Pazzaglia and Brandon [2001] for further discussion of this interpretation).…”
Section: Regional Settingmentioning
confidence: 99%
“…The primary and most significant interpreted result from Line 4 and the other lines was the imaging of the top of the Juan de Fuca plate beneath Vancouver Island (event E2) and probably the top of the imbricated sedimentary rocks that were subducted with the plate (event E1). In this interpretation, event F, imaged much more clearly on Line 2 (Clowes et al 1987), is tentatively associated with the oceanic Moho of the subducting plate. Unfortunately, these deep reflections could not be tied directly with any geological feature.…”
Section: Vancouver Island and The Initiation Of Lithoprobementioning
confidence: 84%
“…Much discussion occurred but finally a consensus on interpretation was reached. Subsequently, a series of papers were published (Yorath et al 1985;Green et al 1986;Clowes et al 1987). Figure 2b and 2c, extracted from Clowes et al (1987), show the data and interpretation for Line 4.…”
Section: Vancouver Island and The Initiation Of Lithoprobementioning
confidence: 99%
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