A sheared and altered pendant in the Cassiar batholith, headwaters of the Stikine River, B.C. ...

• Main Author: Taplin, Arthur Cyril
• Format: Text
• Language: English
• Published: University of British Columbia 2012
• Subjects: Stikine River
• Online Access: https://dx.doi.org/10.14288/1.0053505; https://doi.library.ubc.ca/10.14288/1.0053505

This thesis represents a field and petrographic study of an elongate, tabular 'roof pendant' within the Cassiar Batholith. The general area lies between the headwaters of the Stikine and Finlay rivers in north-central British Columbia. Since no previous geological mapping had been carried out in this area, some details on the extent, lithology, and structure of the various formations are presented. These consist of the Takla Group of volcanics and marine sediments ranging from upper Triassic to upper Jurassic in age; the Cassiar Intrusions representing one general period of batholithic invasion; and the Sustut Group, composed of conspicuously bedded continental strata of upper Cretaceous and Paleocene age. Minor basic intrusives of probable Tertiary age are also present. The pendant occurs within intrusives of gabbroic composition. A wedge-shaped body along the western border consists of quartz gabbro. Bluish green hornblende, comprising some 25% of the rock, shows a lineation which is also visible in the ...