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

R.L Christie,J.S Peel

doi:10.34194/rapggu.v82.7515

Abstract

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.

Highlights

The Lower Palaeozoic sequence of the Børglum Elv region of Peary Land consists of some 3000 m of early Cambrian to late Silurian carbonate and clastic sediments
The deposits form part of an extensive shelf zone stretching east-west across North Greenland which occupies an intermediate position between the stable craton to the south, and the North Greenland Geosyneline to the north (Dawes, 1971, 1976a; Dawes & Peel, in press)
The Lower Palaeozoic is known from early work by Koch (1923) and Troelsen (1949a, 1956)

Summary

INTRODUCTION

The Lower Palaeozoic sequence of the Børglum Elv region of Peary Land (figs 1-3) consists of some 3000 m of early Cambrian to late Silurian carbonate and clastic sediments. The aim of the fieldwork during the summer of 1974 was to compile a geological reference section through the Lower Palaeozoic sequence of southern Peary Land, as exposed in the valley of Børglum Elv, in preparation for a future regional mapping programme.The project was designed to complement the work of Jepsen (1971) by continuing section description from the early Cambrian, through Ordovician formations previously described by Troeisen (1949a) and into overlying, undescribed Silurian carbonates and clastics (subsequently partly described by Mayr, 1976).

D Covered

Rapport Dr 82

Findings

C Buen and Brønlund Fjord Formations at Brillesø