Geophysical discovery and evaluation of the west peko copper-gold deposit, Tennant Creek

Abstract

A drill hole magnetometer developed to assist exploration for gold and copper bearing magnetite bodies (ironstones) has aided in the discovery of two large mineralised ironstones at depths between 400m to 650m below surface in the Tennant Creek area of the Northern Territory. These bodies are surrounded by a broad zone of sediments containing magnetite, the magnetic response of which dominates the surface anomaly. A 600 metre wildcat hole was drilled and subsequently surveyed using the magnetometer which detected a large magnetic anomaly towards the bottom of the hole. Follow up drilling and interpretation of magnetic surveys successfully guided exploration in the definition of significant bodies of ironstone. © ASEG 1991.