Alkaline Rocks and Carbonatites of the World

Setup during HiTech AlkCarb: an online database of alkaline rock and carbonatite occurrences

Baldface Mountain Volcanic Field

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Occurrence number: 
031-00-198
Country: 
Canada
Region: 
British Columbia
Location: 
Longitude: -124.53, Latitude: 52.76
Carbonatite: 
No

The Baldface Mountain Volcanic Field is located in the Chilcotin Highland of western British Columbia, belonging to the central segment of the E-W oriented Anahim Volcanic Belt. The field covers an area of ~400 km2, consisting of a scattered collection of shield volcanoes, cinder cones, and lava flows in varying degrees of erosional state and exposure. These occurrences are mostly found as mountains and topographic highs within the landscape, such as the eponymous mountain located in the north of the field. Lavas found at these volcanic centres consist of an alkaline, bimodal suite of rocks, ranging from basanites and trachybasalts to trachytes and phonolites. Mafic rocks appear to dominate, and some samples of these rocks are nepheline-normative. Geochemical data, including major and trace elements, and sampling localities can be found in Kuehn (2014).

Age: 
2.52-0.91 Ma Ar-Ar (Kuehn, 2015)
References: 
KUEHN, C., 2014. A Second North American Hot-spot: Pleistocene Volcanism in the Anahim Volcanic Belt, west-central British Columbia. Doctoral Thesis, University of Calgary. KUEHN, C., GUEST, B., RUSSELL, J.K. & BENOWITZ, J.A., 2015. The Satah Mountain and Baldface Mountain volcanic fields: Pleistocene hot spot volcanism in the Anahim Volcanic Belt, west-central British Columbia, Canada. Bulletin of Volcanology 77, 19
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