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A Special Issue Devoted to Proterozoic Iron Oxide Cu-Au-(U) and Gold Mineral Systems of the Gawler Craton: Preface

Roger G. Skirrow^1, and Garry J. Davidson²

¹ Geoscience Australia, GPO Box 378, Canberra, A.C.T., Australia 2601
² ARC Centre of Excellence in Ore Deposits (CODES), University of Tasmania, Hobart, Tasmania, Australia 7001

Corresponding author: e-mail, roger.skirrow@ga.gov.au

The first 20% of the full text of this article appears below.

	Introduction

 
The Gawler craton in South Australia hosts the Olympic Dam Cu-U-Au deposit, the world’s preeminent iron oxide copper-gold (IOCG) deposit and largest uranium resource. With a total resource now standing at 7.7 billion tonnes, Olympic Dam is also one of the world’s largest copper and gold deposits (BHP Billiton, 2007 Annual Report).

The emergence of IOCG deposits as a recognized mineral deposit class (Hitzman et al., 1992) has been followed by increasing interest in these deposits from explorers and researchers. IOCG deposits are attractive exploration targets because of their favorable grade-tonnage characteristics, credits of gold and other metals (e.g., U, Ag), and physical characteristics that are particularly amenable to geophysical exploration techniques. Despite this growing interest and an increasing number of published descriptions of the major deposits, there have been few multidisciplinary integrated studies of the regional geologic settings and metallogeny of major IOCG provinces globally.

As one of the world’s key IOCG provinces, the Gawler craton has experienced rapid growth in exploration expenditure this decade, resulting in discoveries of the Prominent Hill IOCG deposit in 2001 and the Carrapateena deposit in 2005 (Fig. 1). Over the period of these discoveries in the eastern Gawler craton, explorers in the central Gawler craton were defining a number of new gold . . . [Full Text of this Article]