Vol. 196 No. 3 (1973): Meddelelser om Grønland

Introduction. s. 5

Geography of the area. s. 6

Regional geology. s. 6

Present investigation in the Frederikshab area. s. 7

Geology of the basement. s. 8

Local stratigraphy. s. 8

Structures. s. 11

Geological setting and forms of the ultramafic bodies. s. 11

Lithology and petrology. s. 14

Country rocks. s. 14

Ultramafic rocks. s. 16

Subdivision of the ultramafic rocks. s. 16

Primary ultramafics. s. 16

Amphibolized primary ultramafics. s. 20

Ultramafic metamorphites. s. 24

Discussion on the lithology. s. 28

Types of border reaction zoning. s. 30

Border zoning of the ultramafics in the area. s. 30

Geochemistry of the ultramafics. s. 34

Geochemistry of primary ultramafics. s. 34

Geochemistry of amphibolized primary ultramafics. s. 35

Geochemistry of ultramafic metamorphites. s. 36

Ultramafics related to chemical classifications and systems. s. 36

Geochemical aspects of border reaction zones. s. 41

Discussion on the geochemistry of ultramafics. s. 44

Summary and conclusions. s. 48

Acknowledgements. s. 50

Tables 2-4. s. 52

References. s. 58