Geology, Meager Creek geothermal area, British Columbia

Read, P B

doi:10.4095/129507

Cited by 23 publications

(22 citation statements)

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“…Excluding the basalt lava flow (site 1), all volcanic deposits originate from the 2360 BP eruption of Mount Meager (Nasmith et al 1967;Read 1977;Clague et al 1995). Further details concerning the nature and distribution of the deposits derived from the 2360 BP eruption are described in detail by Stasiuk and Russell (1990).…”

Section: Field Surveysmentioning

confidence: 99%

Characterization of volcanic deposits with ground-penetrating radar

Russell

Stasiuk

1997

Bulletin of Volcanology

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Field-based studies of surficial volcanic deposits are commonly complicated by a combination of poor exposure and rapid lateral variations controlled by unknown paleotopography. The potential of ground-penetrating radar (GPR) as an aid to volcanological studies is shown using data collected from traverses over four well-exposed, Recent volcanic deposits in western Canada. The deposits comprise a pumice airfall deposit (3-4 m thick), a basalt lava flow (3-6 m thick), a pyroclastic flow deposit (15 m thick), and an internally stratified pumice talus deposit (60 m thick). Results show that GPR is effective in delineating major stratigraphic contacts and hence can be used to map unexposed deposits. Different volcanic deposits also exhibit different radar stratigraphic character, suggesting that deposit type may be determined from radar images. In addition, large blocks within the pyroclastic deposits are detected as distinctive point diffractor patterns in the profiles, showing that the technique has potential for providing important grain-size information in coarse poorly sorted deposits. Laboratory measurements of dielectric constant (K') are reported for samples of the main rock types and are compared with values of K' for the bulk deposit as inferred from the field data. The laboratory values differ significantly from the "field" values of K'; these results suggest that the effectiveness of GPR at any site can be substantially improved by initial calibration of well-exposed locations.

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Section: Field Surveysmentioning

confidence: 99%

Characterization of volcanic deposits with ground-penetrating radar

Russell

Stasiuk

1997

Bulletin of Volcanology

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“…Large parts of the Mount Meager volcanic complex are hydrothermally altered (Read, 1979). The alteration, together with the steep slopes, result in high rates of mass wasting and landslides.…”

Section: Settingmentioning

confidence: 99%

Impact of a Quaternary volcano on Holocene sedimentation in Lillooet River valley, British Columbia

Friele

Clague

Simpson

et al. 2005

Sedimentary Geology

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“…1). It is part of the MMVC, which consists of about 20 km 3 of volcanic rocks, ranging in age from Pliocene to Holocene (Read, 1978(Read, , 1990. The MMVC lies at the northern limit of the Cascade magmatic arc, which includes other prominent volcanoes in the Pacific Northwest such as Mounts Baker, Rainier, and St. Helens in Washington State, Mount Hood in Oregon, and Mount Shasta in California.…”

Section: Geology and Geomorphologymentioning

confidence: 99%

“…The MMVC consists of highly fractured, weak, and hydrothermally altered volcanic rocks (Read, 1990), the lowermost of which were assigned by Read (1978) to the Capricorn Formation, which comprises 200 m of porphyritic rhyodacite breccia and tuff, and 200 m of porphyritic rhyodacite flows. Above the Capricorn Formation and forming the steep summit flank is a porphyritic dacite plug of the Plinth Formation.…”

Section: Geology and Geomorphologymentioning

confidence: 99%