| Title | Recent basaltic volcanism in the Iskut-Unuk rivers area, northwestern British Columbia |
| Download | Download (whole publication) |
| Author | Hauksdóttir, S; Enegren, E G; Russell, J K |
| Source | Cordillera and Pacific Margin/Cordillère et marge du Pacifique; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1994-A, 1994 p. 57-67, https://doi.org/10.4095/193622 (Open Access) |
| Year | 1994 |
| Publisher | Natural Resources Canada |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| Related | This publication is contained in Geological Survey of
Canada; (1994). Cordillera and Pacific Margin, Geological Survey of Canada, Current Research no. 1994-A |
| File format | pdf |
| Province | British Columbia |
| NTS | 104B |
| Area | Iskut River; Unuk River; Snippaker Creek; Cone Glacier; Cinder Mountain; King Creek; Lava Fork; Blue River |
| Lat/Long WENS | -132.0000 -130.0000 57.0000 56.0000 |
| Subjects | igneous and metamorphic petrology; Recent; volcanic vents; volcanoes; lava flows; cinder cones; glaciers; radiocarbon dates; potassium argon dates; radiometric dates; volcanic rocks; basalts;
pyroclastics; igneous rocks; Quaternary |
| Illustrations | sketch maps; photographs; analyses |
| Released | 1994 02 01 |
| Abstract | The Iskut-Unuk rivers area contains eight Recent volcanic centres comprising alkali-basalt lava flows, pillow lava, hyaloclastite and cinder cones, including: the Iskut River, Tom MacKay Creek,
Snippaker Creek, Cone Glacier, Cinder Mountain, King Creek, Second Canyon and Lava Fork centres. Lava flows range from 70 000 to ~150 years. The oldest volcanic rocks underlie the Iskut River Lava Flats and the youngest occur at the Lava Fork
centre. The lavas erupted from each centre are similar in mineralogy. Most contain plagioclase and olivine phenocrysts and clinopyroxene occurs as a groundmass phase. Plagioclase megacrysts characterize lavas from a number of volcanic centres, but
are particularly abundant in lavas from Snippaker Creek and Cone Glacier. Crustal xenoliths are abundant in Lava Fork and Cone Glacier lavas but less common elsewhere. Many of the volcanological features are attributable to volcanic eruptions
occurring near and beneath glaciers. |
| GEOSCAN ID | 193622 |
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