Dr. Alison Leitch

Magma Mingling in the Holyrood Granite

Student: Pat O’Grady           Co-investigator: Greg Dunning

The 620 Ma Holyrood Intrusive Suite, part of a horst on the eastern Avalon Peninsula, Newfoundland, is comprised of rocks ranging from diorite to granite. In a coastal exposure, the granite host was intruded by darker tonalite blobs. In this field, petrographic and geochemical study, the relationship between the magmas and their relative rheologies were examined to determine their dynamic history.

Outcomes:

BSc Hons: Patrick O’Grady (2013) “Magma mingling in the Avalonian Holyrood Granite”

Leitch, A.M., O’Grady, P. and Dunning, G., “Magma mingling in the Avalonian Holyrood Granite”, GAC MAC Annual Meeting, Fredericton, NB, May 21-23, 2014.

O’Grady, P., Leitch, A.M. and Dunning, G., “Magma mingling in the Avalonian Holyrood Granite”, AGS Annual Meeting, Dartmouth NS, 2013.

O’Grady, P., Leitch, A.M. and Dunning, G., “Magma mingling in the Avalonian Holyrood Granite”, NL GAC Annual Spring Meeting, St John’s NL, 2013.

Contact

Earth Sciences

230 Elizabeth Ave, St. John's, NL, CANADA, A1B 3X9

Postal Address: P.O. Box 4200, St. John's, NL, CANADA, A1C 5S7

Tel: (709) 864-8000