Mitton, Bruce2023-06-072023-06-071985https://unbscholar.lib.unb.ca/handle/1882/35923The occurrence of cassiterite at the southern end of the Dungarvon Granite is a product of late stage hydrothermal activity. The alteration of the granitoids and country rocks has been studied using thin sections and the x - ray diffractometer. Five alteration products have been recognized: chloritization of biotite , sericitization of plagioclase, illitization of feldspar, carbonitization and epidotization . Use of the alteration products for exploration is limited as alteration is apparent mainly at the microscopic level.ix, 73 pageselectronicen-CAhttp://purl.org/coar/access_right/c_16ecsenior reportBachinski, DonaldEarth Sciences