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About Us





HolcombeCoughlinOliver is a consortium of three independent international geological consultancies (European and Australian-based) specialising in the application of modern structural geology and hydrothermal fluid geochemistry to the global resource industry [download flyer (280 Kb) ]


Rod Holcombe (PhD) has over 40 years of structural analysis and 3D modelling experience in orogenic systems as both a teaching/research academic and a consultant to the minerals exploration industry. He is a specialist in the structural analysis of complex metamorphic terranes and shear zones with experience in Precambrian and Phanerozoic terranes in Australia, New Zealand, USA, Canada, Brazil, Argentina, Uruguay, Peru, Thailand, Laos, East and West Africa, the Balkans, Caucasus, Finland, and Siberia, and has considerable experience in structural training for geologists.
Computer applications and other products developed by Rod for use by structural and exploration geologists can be found at: http://www.holcombe.net.au/software/

Rod trades under the name HolcombeCoughlinOliver
ABN: 29863107460
66 Tallai Rd, Tallai, Qld 4213, Australia: Ph +61 (0)402 859 610
email: [email protected]


Tim Coughlin (MSc, PhD) is a structural geologist with particular experience in frontier target generation and risk analysis in emerging and developing countries.
Tim has some 25 years of applied research and both mineral and petroleum exploration experience. He has worked on target-generation and deposit-scale problems in the central and northern Andes, thewestern Tethyan of the Balkans and Caucasus regions, the Papuan fold belt, northern China, Siberia and the Russian Far East, and eastern Australia. Tim has consulted to a wide range of resource industry clients, has held senior staff positions with well-known medium and large-scale companies, and has successfully guided an international exploration company from start-up to development.
Tim is now President & CEO of Lydian International and currently unavailable for independent consultation


Nick Oliver (PhD) is a structural and hydrothermal systems geologist, particularly in complex environments. Experience includes IOCG, U and Mo (Mount Isa-Cloncurry region), sediment and volcanic-hosted base metals (Austraia, Scandinavia), greenstone-, BIF- and black slate-hosted vein gold deposits (Western Australia, Brazil, Siberia, Tanzania), giant iron ores (Pilbara, Transvaal), and epithermal/porphyry Au and Cu-Au vein and breccia systems (New Zealand, Colombia, Philippines, Turkey). Nick provides practical approaches to deal with complex alteration systems, restructuring of geochemical datasets and strategies, and identification of fluid pathways in deformed rocks, for improved ore deposit and exploration models. He has 25 years experience in industry contract and collaborative research and focussed short course training with juniors to majors, including 13 years as the Professor of Economic Geology and Director of the Economic Geology Research Unit at James Cook University

Nick trades under the name HCO Associates Pty Ltd
ABN:52 154 666 707
PO Box 3533, Hermit Park, Qld 4812, Australia: Ph +61 417764880
email: [email protected]

Our operation HCO operates as a partnership between the business entities of the three principals. We offer shared services and products where possible, yet can operate independently if necessary.
Service contracts can be drawn up with any one of the Principals, or with any combination of them.

Exploration philosophy The thread that joins us is a common conviction that exploration solutions should flow from a detailed understanding of the observed structural geometry. That is, interpretations should be solidly based on field data, and not be over-reliant on theoretical models. Where exploration risk requires application of theory then that theory should be as solidly bound in observation as possible.

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