SCHEELITE MINERALIZATION IN CENTRAL GREENLAND
Numerous scheelite-mineralized areas have been located in the Caledonian fold belt of Central East Greenland (70 degrees - 74 1/2 degrees N). The fold belt comprises Archaean and Proterozoic metamorphic complexes flanked by Late Proterozoic and Lower Palaeozoic sediments, and intruded by Upper Proterozoic and Caledonian granite rocks. Scheelite mineralization occurs in: marble-skarns in Upper Proterozoic metasediments often spatially associated with Caledonian or older granite intrusives; skarns and quartz veins in Late Proterozoic sediments (Lower EBG quartzite) up to 7 km from outcropping Caledonian granites; veins in fault zones cutting late Proterozoic sediments (Upper EBG limestones). In this paper, the three types are described with emphasis on structural setting, mineralogy and trace element chemistry. It is concluded that most scheelite mineralization is associated with Caledonian igneous activity, either at or near granite contacts or as mineralization distal to granites at depth. Of the various types described, the scheelite veins in Late Proterozoic limestone are considered to be of the best economic potential.
Bibliographic Reference: EUR 8617 EN-FR (1984) FS - REPRINTED FROM MINERALIUM DEPOSITA, SPRINGER-VERLAG PP. 315-333, BFR 400 , EUROFFICE, LUXEMBOURG, POB 1003
Record Number: 1989122032700 / Last updated on: 1987-01-01
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