Geophysical field work in relation to mineral exploration programmes in South Greenland

Abstract

Geophysical field work in connection with mineral exploration programmes was carried out in two areas in South Greenland: on the Narssaq peninsula south-west of Qagssiarssuk in co-operation with P. Nyegaard and A. Armour-Brown (Sydex project), and north of Motzfeldt Sø in co-operation with T. Tukiainen (Niobium project). This note briefly describes the objectives of the field work and gives examples of the data acquired from one area. The field activities were supported logistically from GGU's facilities in Narssarssuaq (J. Lau), and were carried out from tent camps in the two areas. Camps were moved by S-61 helicopter. Besides the authors, Egon Hansen (electronics technician) and Jette Halskov (assistant) participated in the field work which took place from June 27th to August 27th. The summer was characterized by frequent bad weather including storms and snow and, consequently, data coverage is not as complete as had been hoped. The main objectives of the field work, however, were achieved. There were several innovations in this summer's instrumentation (see later) and equipment. The use of two new tents (Hansen Weatherport, insulated) for the mess and 'geophysicaI' huts made it possibie to endure the hardships of long periods of bad weather and to make the geophysical equipment usable in sub-zero temperatures, fog and other types of adverse weather. These gains easily outbalance the slightly added total weight of the camp.