Page 206 - Caldera Volcanism Analysis, Modelling and Response

CHA P T E R 5

Characterisation of Archean

Subaqueous Calderas in Canada:
Physical Volcanology, Carbonate-Rich

Hydrothermal Alteration and a New

Exploration Model

1, 2 3 4 5
W.U. Mueller , J.B. Stix , J.D.L. White , P.L. Corcoran , B. Lafrance and
R. Daigneault 1

Contents

1. Introduction 183
2. Abitibi Greenstone Belt Geology 183
2.1. Abitibi greenstone belt divisions 185
3. Notion of Calderas 186
4. Hunter Mine Caldera 187
4.1. Lower formational stage (first caldera event) 187
4.2. Middle formational stage (intrusive event) 197
4.3. Upper formational stage (second caldera event) 198
4.4. Evolution of hunter mine caldera 199
5. Normetal Caldera 202
5.1. Normetal caldera phases 1 and 2 202
5.2. Normetal caldera phases 3 and 4 208
5.3. Normetal volcaniclastic deposits (normetal marker horizon) 210
5.4. Normetal caldera mine sequence phase 5 210
5.5. Normetal caldera evolution 211
6. Sturgeon Lake Caldera, Wabigoon Subprovince 211
6.1. Sturgeon lake caldera volcanic succession 211

Corresponding author. Tel.: 1-418-545-5013; Fax: 1-418-545-5012
E-mail address: Wulf_Mueller@uqac.ca
1
Sciences de la terre, Universite ´ du Que ´bec a ` Chicoutimi, Canada, G7H 2B1
2
Department of Earth & Planetary Sciences, McGill University, Canada
3
Geology Department, University of Otago, Dunedin, New Zealand
4
Department of Earth Sciences, University of Western Ontario, London, Ontario, Canada, N6A 5B7
5
Cogitore, 1300 Saguenay, Suite 200 Rouyn-Noranda, Que ´bec Canada J9X 7C3
Developments in Volcanology, Volume 10 r 2008 Elsevier B.V.
ISSN 1871-644X, DOI 10.1016/S1871-644X(07)00005-8 All rights reserved.
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