Acknowledgements xix pioneering workers on igneous layering in
Greenland xx Wbrkshop participants xxii Henning Sfl!rensen,
University of Copenhagen, Dermark. Latte Melchior Larsen,
Geological SUrvey of Greenland, Copenhagen, Dermark. Abstract 1 1 *
Introduction 1 1. 1 The agpaitic rocks of the Ilimaussaq intrusion
3 2. Igneous layering in the Ilimaussaq intrusion 4 3. Mineralogy
of the layered kakortokite series 15 4. Chemistry of the layered
kakortokite series 19 5. Origin of the kakortokite layering 20 5. 1
Discussion 22 6. Conclusion 25 References 26 2. I. AYERn";r
CCMPl\CTIOO NID PCBJ. "--MN}tATIC ~ IN '!HE KLOKKEN INTRUSIOO 29
Ian Parsons and SUsanne M. Becker, University of Aberdeen, U. K.
Abstract 29 1. Introduction 30 2. Age of the intrusion 31 3.
General structure and mineral variation 31 vi TABLE OF CONTENTS 3.
1 Nomenclature of rock types 31 3. 2 Bulk chemical and modal
variation 36 4. The contacts and wall-rocks 37 4. 1 Guter contact
37 4. 2 The gabbro sheath 37 4. 3 The unlaminated syenite sheath 39
4. 4 The gabbro-syenite transition 41 5. The layered series 43 5. 1
General relationships 43 5. 2 Granular syenites 43 5. 2. 1
Structure and cryptic variation 43 5. 2. 2 Origin of granular
layers 46 5. 2. 3 Trace elements and chamber dlinensions 47 5. 3
Laminated syenites 48 5. 3. 1 General features 48 5. 3. 2 Mineral
layering 51 5. 3.
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