The geology and mineralisation of the Mesters Vig area, East Greenland. Part I. General geology. Part II. Blyklippen occurrence, structure and its influence on ore deposition

Bondam, J; Brown, Howard E.

doi:10.34194/bullggu.v11.6543

Cited by 2 publications

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“…The detailed geology of the area was described by Witzig (1954), Bondam & Brown (1955 and Perch- Nielsen et al (1972). Description of the Blyklippen deposit were given by and Gross (1956).…”

Section: Wegener Halv0 Formationmentioning

confidence: 99%

“…The age of the mineralization is generally assumed to be Tertiary and the mineralizing event is correlated with the formation of the alkaline Werner Bjerge complex (Bondam & Brown 1955, Gross 1956). However, it may be noted that the quartz veins have never been observed in Triassic sediments and aeromagnetic measurements (H .C.…”

Section: Veins In the Area Between Mesters Vig And Noretmentioning

confidence: 99%

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The mineral occurrences of central East Greenland

Harpøth,

Pedersen,

Schønwandt

et al. 1986

Meddr Grønland. Geosci.

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The present monograph on the mineral occurrences of central East Greenland is the result of an agreement between Nordisk Mineselskab A/S and the Mineral Resources Administration of Greenland (Råstofforvaltningen for Grønland) on compilation of the mineral-exploration activity carried out in central East Greenland by Nordisk Mineselskab A/S during the period 1952- 1984. The main aim is to present geological descriptions of all known mineral occurrences and to compile most of the existing geochemical data in a manner applicable to future exploration in the area. More than 200 individual mineral occurrences are described and many in great detail. Geochemical data are presented for scheelite and for 16 elements relevant to the evaluation of the mineral potential of the area. The data are presented as single-element anomaly maps for both rock samples and panned heavy-mineral concentrates and include data from a file consisting of more than 10 000 rock samples and close to 4000 panned heavy-mineral samples. Mineralization in central East Greenland occurs in rocks of Archaean to Oligocene age and has tentatively been grouped into several periods when mineralization took place. Mineralization hosted in Archaean-Lower Proterozoic rocks includes magnetite and chromite accumulations and iron-sulphide segregations associated with ultramafic and mafic igneous assemblages, volcanogenic massive-sulphide occurrences, titaniferous magnetite and ilmenite occurrences associated with original plutonic anorthositic massifs, banded iron-formations, gold-bearing quartz veins, a complex copper-skarn occurrence, and uranium and gold-uranium occurrences of unknown origin. Mineralization hosted in Middle and Upper Proterozoic rocks is restricted to lead-zinc and tungsten skarns and stratiform copper occurrences. Mineralization hosted in Lower Palaeozoic rocks is in general believed to be associated with Caledonian orogenic activity. It comprises tungsten skarn occurrences mainly associated with granodiorite intrusions, base-metal and tungsten mineralization associated with late-kinematic probably calc-alkaline granite, tin-tungsten-arsenic quartz veins associated with late-kinematic probably mildly alkaline granites, gold-bearing quartz veins associated with late-kinematic granite, uraniferous veins in probably Devonian alkaline granite, tungsten-antimony-gold and silver-bearing base-metal veins in low-grade metamorphic sediments, uranium-fluorite veins in Devonian felsic volcanic rocks and strata-bound uranium occurrences hosted in Devonian elastic rocks. Mineralization hosted in Upper Palaeozoic sediments (Carboniferous - Permian) includes base-metal quartz-baryte veins locally enriched in precious metals, goldbearing quartz veins. uraniferous veins, carbonate-hosted strata-bound baryte base-metal occurrences, carbonate-hosted strata-bound celestite occurrences, stratiform base-metal showings of Kupferschiefer type and strata-bound red-bed copper occurrences. Mineralization hosted in Mesozoic sediments is represented by Triassic stratiform and strata-bound base-metal occurrences of red-bed type and Jurassic placers rich in zirconium and rare-earth elements. Tertiary mineralization includes a major porphyry-molybdenum occurrence, granite roof-zone molybdenum mineralization, niobium mineralization associated with alkaline intrusive rocks, lead-zinc skarn occurrences, a minor magnetite-skarn showing, lead-zinc-bearing quartz veins and precious-metal, base-metal, molybdenum and fluorite mineralization associated with fumarolic volcanic activity. The location of all mineral occurrences is shown on a separate map: Mineral Occurrences in Central East Greenland.

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Section: Wegener Halv0 Formationmentioning

confidence: 99%

Section: Veins In the Area Between Mesters Vig And Noretmentioning

confidence: 99%

The mineral occurrences of central East Greenland

Harpøth,

Pedersen,

Schønwandt

et al. 1986

Meddr Grønland. Geosci.

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“…Further, extensive pneumatolytic and hydrothermal activity associated with the complex has given rise to mineralisation of considerable economic interest. This includes a major disseminated molybdenum deposit at Malmbjerg (Bearth 1959, Kirchner 1964 and a now exhausted galena and sphalerite vein-deposit at Mesters Vig (Bondam & Brown 1955).…”

Section: Mineralogy Of the Werner Bjerge Alkaline Complex East Greenlandmentioning

confidence: 99%

Mineralogy of the Werner Bjerge alkaline complex, East Greenland

Brooks,

Engell,

Larsen

et al. 1982

Meddr Grønland. Geosci.

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The Tertiary Werner Bjerge complex is divided into a basic complex, a northern complex and a nepheline syenite complex. The basic complex consists of cumulate rocks (ranging from ultramafic to gabbros) containing plagioclase, clinopyroxene, olivine and titanomagnetite with intercumulus kaersutite or biotite and subsolidus amphiboles and sheet silicates. Similar cumulates but containing cumulus kaersutite occur as inclusions in dykes associated with the nearby Theresabjerg intrusion and have been included in the study. The northern complex includes a wide range of felsic rock types of which two granites have been examined. In the nepheline syenite complex the rock types investigated include foyaites, a tinguaite, and quartz-bearing pegmatite. The main minerals in these rocks are alkali feldspar, nepheline, sodalite, alkali pyroxene, alkali amphibole and biotite together with a wide range of minor and accessory phases. Clinopyroxenes vary from diopsides and salites in the basic rocks to aegirine-augites and acmites in the more evolved types, which are unusually MnO-rich. Titan-aegirines occur in the pegmatite. The amphibole in the basic rocks is kaersutite; in the granite it is manganoan richterite, and in the nepheline syenite complex the amphiboles vary from hastingsitic hornblende through katophorite to manganoan arfvedsonite. The pegmatite contains unique Li-arfvedsonites. Minor late-stage calcic amphiboles occur in the basic rocks. Sheet silicates include micas and secondary mixed layer types, chlorite and talc. Primary micas of the basic complex are titaniferous biotites and in the nepheline syenites are Mn-rich biotites, while the pegmatite contains the rare Li-mica, taeniolite. Feldspars range from bytownite in the basic rocks to mainly alkali feldspar in the nepheline syenites which is often optically homogeneous and strongly potassic. Analyses of feldspathoids and zeolites are also presented. The oxides of the evolved rocks are also MnO-rich and pyrophanite has been encountered in both the granite and the nepheline syenites. Other Mn-rich phases are also present, such as Mn-pectolite and kupletskite (the Mn analogue of astrophyllite). Data have also been acquired for a wide range of accessory phases including (additionally) sulphides (pyrrhotite, pyrite and sphalerite), apatite, sphene, titanian garnets, narsarsukite, pyrochlore, calcite, chevkinite and several unidentified zirconosilicates from the nepheline syenites. It is concluded that the geochemical coherence between the various rock units of the intrusion suggests a comagmatic origin for these, while the close similarities between the mineralogies of the Kangerdlugssuaq and Werner Bjerge alkaline complexes suggest a similar origin.

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The geology and mineralisation of the Mesters Vig area, East Greenland. Part I. General geology. Part II. Blyklippen occurrence, structure and its influence on ore deposition

Cited by 2 publications

References 0 publications

The mineral occurrences of central East Greenland

The mineral occurrences of central East Greenland

Mineralogy of the Werner Bjerge alkaline complex, East Greenland

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