The Precambrian, Eocambrian and early Palaeozoic stratigraphy of the Jørgen Brønlund Fjord area, Peary Land, North Greenland

The sedimentary sequence in the platform area (approx. 2500 km2) around Jørgen Brønlund Fjord, North Greenland, has been mapped, and sections through the Precambrian, Eocambrian and Lower Palaeozoic sequence are described. After a summary of the previous geological field work carried out in the area, a lithological description of a composite section through the sequence below the Lower Cambrian Brønlund Fjord Dolomite (Troelsen, 1949) is given. This sequence, which is about 1000 m thick, is divided into four formations – in ascending order: Inuiteq Sø Formation (sandstone), Morænesø Formation (tillite and dolomite), Portfjeld Formation (dolomite) and Buen Formation (sandstone and shale). The first three named formations are separated by two unconformities both representing a long period of erosion. The strata are cut by two dolerite sequences, of which the older (the Midsommersø dolerites) is of Precambrian age and intrudes only the Inuiteq Sø Formation. Intrusions of the younger sequence penetrate all the strata in the Jørgen Brønlund Fjord area and are regarded as post-Palaeozoic. In the last section the chronostratigraphy and the correlation with neighbouring areas are discussed. Special attention is given to the two newly discovered erosional unconformities, which together with the tillite occurrence and the radiometric K/Ar dated Midsommersø dolerites, throw new light on the stratigraphy of North Greenland.

Notes on some Lower Palaeozoic to Tertiary faunas from eastern North Greenland

10.34194/rapggu.v65.7379 ◽

1974 ◽

Vol 65 ◽

pp. 18-23

Author(s):

J.S Peel ◽

P.R Dawes ◽

J.C Troelsen

Keyword(s):

Field Work ◽

The South ◽

Initial Field ◽

North East ◽

The North ◽

Lower Palaeozoic ◽

The north-east 'corner' of Greenland is geologically probably the least known region in North Greenland. Various expeditions have visited the coastal parts but geological detail, particularly faunal information, has remained surprisingly scarce. Initial field work by Koch (1923, 1925) and Troelsen (1949a, b, 1950) showed that a Precambrian to Silurian section - unfolded in the south, folded in the north - was unconformably overlain by a Carboniferous to Tertiary section, now referred to as the Wandel Sea basin (Dawes & Soper, 1973).

A reconnaissance of the Quaternary geology of eastern North Greenland

10.34194/rapggu.v99.7676 ◽

1980 ◽

Vol 99 ◽

pp. 99-105

Author(s):

S Funder ◽

C Hjort

Keyword(s):

Field Work ◽

Ice Cover ◽

Quaternary Geology ◽

Sedimentary Sequence ◽

Photo Interpretation ◽

Outer Limit ◽

Stratigraphic Framework ◽

Present Distribution ◽

Air Photo ◽

The aim of the field work in 1979 was to provide a stratigraphic framework which, together with later air-photo interpretation, will make possibIe the drawing of a 1:500 000 Quaternary map of the area. We concentrated our work on localizing and dating the outer limit of maximum ice cover, and on determining when glaciation started, and at what time the present distribution of ice was achieved. However, much work was also done on the pattern of isostatic readjustment and, in easternmost Peary Land, investigations were made on a c. 100 m thick sedimentary sequence of pre-Holocene age at Kap København. Figure 43 shows the area and place names mentioned in the text below.

Biostratigraphic reconnaissance in the Lower Palaeozoic of western North Greenland

10.34194/rapggu.v121.7872 ◽

1984 ◽

Vol 121 ◽

pp. 19-51

Author(s):

P.R Dawes ◽

J.S Peel

Keyword(s):

Fault Zone ◽

Deep Water ◽

Lower Cambrian ◽

The South ◽

The West ◽

Middle Ordovician ◽

Water Trough ◽

Lower Palaeozoic ◽

North Greenland ◽

Land Region

Sections and fossil collections resulting from activities under Operation Grant Land 1965-66 in the Hall Land - Wulff Land region of western North Greenland are briefly discussed. Strongly tectonised Lower Cambrian to Silurian strata are present in the northern part of the area in association with the Wulff Land anticline and the Nyeboe Land fault zone. To the south, platform and deep-water trough sequences are generally little disturbed and strata range in age from Middle Ordovician to Late Silurian (Pridoli). Most stratigraphic units can be accommodated in stratigraphic schemes established in Washington Land, to the west, or Peary Land, to the east.

Cambrian–Silurian stratigraphy of Børglum Elv, Peary Land, eastern North Greenland

10.34194/rapggu.v82.7515 ◽

1977 ◽

Vol 82 ◽

pp. 1-48

Author(s):

R.L Christie ◽

J.S Peel

Keyword(s):

Black Shale ◽

Lower Cambrian ◽

Late Ordovician ◽

Dolomitic Limestone ◽

Carbonate Mounds ◽

Middle Ordovician ◽

Clastic Rocks ◽

Shale Formation ◽

Lower Palaeozoic ◽

A sequence of Lower Palaeozoic carbonate and clastic rocks is described from Børglum Elv, Peary Land, eastem North Greenland, and briefly compared to Lower Palaeozoic sections elsewhere in Greenland and in Spitsbergen. Lower Cambrian clastic rocks of the Buen Formation are followed by dolomite of the Lower Cambrian Brønlund Fjord Formation (125 m). Succeeding dolomite and dolomitic limestone of the Wandel Valley Formation (320 m) of Early to Middle Ordovician age are overlain by limestone of the Børglum River Formation (430 m) of Middle to Late Ordovician age. Un-narned Early Silurian dolomite and limestone formations (150 m and 320 m respectively) are followed by an un.narned Middle Silurian black shale formation (c. 100 m) and at least 800 m of a late Middle Silurian and younger un-named flysch formation. Carbonate mounds, originating in the highest beds of the un-named Silurian limestone formation, occupy stratigraphic levels through the overlying black shale formation and into the flysch formation.

Continuation of the palaeomagnetic field work in eastern North Greenland

10.34194/rapggu.v106.7772 ◽

1981 ◽

Vol 106 ◽

pp. 95-98

Author(s):

C Marcussen

Keyword(s):

Field Work ◽

Complete Collection ◽

Rock Samples ◽

Upper Proterozoic ◽

Lower Palaeozoic ◽

The aim of the 1980 fjeld work was to extend the collection of orientated rock samples from North Greenland obtained in 1979 (Abrahamsen & Marcussen, 1980). The material consists of Upper Proterozoic to Lower Palaeozoic sediments as well as the presumed interglacial sediments at Kap København (Table 5). The two years' palaeomagnetic field work has resulted in anearly complete collection of orientated rock samples from all formations older than the Silurian flysch. The collection may be divided into six stratigraphical units (figs 28, 29).

Functional morphology, evolution and systematics of Early Palaeozoic univalved molluscs

Bulletin Grønlands Geologiske Undersøgelse ◽

10.34194/bullggu.v161.6717 ◽

1991 ◽

Vol 161 ◽

pp. 1-116

Author(s):

J.S Peel

Keyword(s):

Functional Morphology ◽

Lower Cambrian ◽

Potential Role ◽

Morphology Evolution ◽

Early Palaeozoic ◽

Molluscan Evolution ◽

This bulletin contains two papers describing aspects of the functional morphology and systematics of Early Palaeozoic untorted molluscs and bellerophontacean gastropods. A brief discussion of the potential role in early molluscan evolution of articulated halkieriids recently discovered from the Lower Cambrian of North Greenland forms an introduction to the volume.

Uppermost Ordovician and Silurian geology of north-west Peary Land, North Greenland

10.34194/rapggu.v88.7554 ◽

1979 ◽

Vol 88 ◽

pp. 41-49

Author(s):

J.M Hurst

Keyword(s):

North West ◽

Precambrian Rocks ◽

Comprehensive Account ◽

Composite Section ◽

Lower Palaeozoic ◽

North Greenland ◽

Carbonate Buildup

In 1978 mapping was concentrated in the area of Peary Land, between J. P. Koch Fjord and Odins Fjord, south of a line connecting Nordpasset with Harebugt and the western end of Frederick E. Hyde Fjord (fig. 11 and map l). Prior to this season the Silurian geology of the area was largely unknown. Previous investigations of the platform sediments of Peary Land (Koch, 1923; Troelsen, 1949, 1956; Jepsen, 1971) had mainly concentrated on the older Lower Palaeozoic and Precambrian rocks of southern Peary Land. The only comprehensive account of the Lower Palaeozoic rocks of the platform (including Silurian) of Peary Land, by Peel & Christie (1975) and Christie & Peel (1977) was based on a single composite section in the Børglum Elv district, north of Jørgen Brønlund Fjord (fig. 11). A localised detailed study of a Silurian carbonate buildup in the Børglum Elv region (Mayr, 1976) is the only other aspect of Silurian geology studied in the whole area.

A Revision of the Lower Hecla Hoek Succession in Central North Spitsbergen and Correlation Elsewhere

Geological Magazine ◽

10.1017/s0016756800050433 ◽

1966 ◽

Vol 103 (1) ◽

pp. 70-97 ◽

Cited By ~ 53

Author(s):

W. B. Harland ◽

R. H. Wallis ◽

R. A. Gayer

Keyword(s):

Lower Cambrian ◽

Field Work ◽

Lower Ordovician ◽

Lower Palaeozoic

AbstractArising from detailed reassessment of field work in the area of Ny Friesland and Olav V Land from 1938 to 1965, a revised stratigraphical scheme is proposed for the Hecla Hoek succession which is known to range downward from Lower Ordovician and Lower Cambrian (1 km.) into a relatively unbroken sequence of Pre-Cambrian rocks about 19 km. thick. The metamorphosed older rocks, previously grouped as Lower Hecla Hoek, are reinterpreted as a succession 12 km. thick with a large volcanic component and a distinctive tillite horizon. Correlation is attempted anew with rocks elsewhere in Spitsbergen and overseas. The Hecla Hoek suite contributes to an interpretation of the development of the Caledonian tectonic province in late Pre-Cambrian and Lower Palaeozoic time.

Hadimopanella from the Lower Cambrian of North Greenland: structure and affinities

Bulletin of the Geological Society of Denmark ◽

10.37570/bgsd-1988-37-08 ◽

1988 ◽

Vol 37 ◽

pp. 83-103

Author(s):

S. E. Bendix Almgreen ◽

John S. Peel

Keyword(s):

Lower Cambrian ◽

New Records ◽

Early Cambrian ◽

Close Relationship ◽

New Material ◽

Early Palaeozoic ◽

New records of minute phosphatic sclerites of Hadimopanella are described from the Aftenstjernesø and Henson Gletscher Formations of western and central North Greenland in strata of Early Cambrian age. The new material illustrates the occurrence of mineralisation in the wall between individual sclerites and confirms earlier suggestions of the close relationship between Hadimopanella and Utahphospha. Both forms are compared with spicules produced by living and fossil compound ascidians of the genus Cystodytes and it is concluded that they may have been Early Palaeozoic representatives of the chordate Class Urochordata.

Lithostratigraphy and structure of the North Greenland fold belt in Nansen Land

10.34194/rapggu.v133.7979 ◽

1987 ◽

Vol 133 ◽

pp. 99-106

Author(s):

H.-J Bengaard ◽

N.C Davis ◽

J.D Friderichsen ◽

A.K Higgins

Keyword(s):

Deep Water ◽

Lower Cambrian ◽

Field Work ◽

Fold Belt ◽

The North ◽

Dyke Intrusion ◽

Thickness Variations ◽

Field work in Nansen Land and adjacent areas in 1985 has largely confirmed the provisional lithostratigraphy of the Paradisfjeld Group and Polkorridoren Group previously established; both are Lower Cambrian deep-water sequences. Some units of the Polkorridoren Group show marked thickness variations. Two major phases of Ellesmerian (Devonian-Carboniferous) deformation are recognised, whereas Eurekan (CretaceousTertiary) events are limited to relatively minor structures, and several phases of dyke intrusion.