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.