Petrology and geochemistry of the archean rocks of the malton gneiss complex,British Columbia |
| |
| Authors: | VE Chamberlain RStJ Lambert JG Holland |
| |
| Institution: | 1. Department of Geology, University of Alberta, Edmonton, Alberta T6G 2E3 Canada;2. Department of Geological Sciences, Science Laboratories, South Road, Durham DH1 3LE England |
| |
| Abstract: | Hornblendic and felsic groups of Archean age and each of broadly similar geochemical composition across the Malton Gneiss Complex southeast of Valemount, Bristish Columbia, show detailed mineralogical and chemical variations from one geographical district to another. The complex appears to be composed of meta-igneous rocks which were originally developed as petrologically discrete units on a roughly 10-km scale, but which all belonged to one similar petrographic province. Overall they are characterized by rather high immobile trace and alkali element abundances. Their nearest geochemical equivalent appear to be found in the grey gneiss complexes of the North Atlantic Craton rather than in the granite-greenstone complexes of the Canadian Shield, but no other Archean complex possesses their overall characteristics. Some similarities in A-F-M and Q-Ab-Or content of these gneisses and those of the Laramie Range, Wyoming, are noted. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
