Abstract
The Tanami Region, a poorly exposed, mostly Paleoproterozoic province within the North Australian Craton, hosts a number of significant gold deposits in diverse settings. Rare exposures of 2,520–2,500 Ma amphibolite facies Archean gneiss and metasedimentary rocks form basement to the thick overlying metasedimentary succession of the 1,880–1,830 Ma Tanami Group. The basal unit of the Tanami Group is the Dead Bullock Formation, a fining-upward deep-water succession dominated by siltstone, carbonaceous siltstone, iron-rich siltstone and mafic sills. Carbonaceous- and iron-rich lithologies in the upper Dead Bullock Formation represent important hosts for gold mineralization. The conformably overlying Killi Killi Formation represents turbiditic sedimentary rocks that are correlated with the widespread Lander Rock beds of the Arunta Region. Sedimentation of the Tanami Group was terminated by regional deformation and greenschist to amphibolite facies metamorphism during the Tanami Event (D1/M1), at around 1,830 Ma. The Tanami Group is unconformably overlain by rhyolite, siliciclastic sedimentary rocks, and felsic ignimbrite of the Ware Group that were deposited at about 1,825–1,810 Ma. Subsequent ESE–WNW to SE–NW directed shortening (D2), followed by NE–SW to E–W directed shortening (D3), has resulted in open NE F2- and NW F3-trending folds in both the Tanami and Ware Groups. Voluminous granitoids, dominated by I-type, biotite granodiorite, and monzogranite were intruded in the interval 1,825–1,790 Ma and have been subdivided using geochemical criteria into the Birthday, Frederick, and Grimwade Suites. Basalt and immature sedimentary rocks of the Mount Charles Formation are restricted in extent to the Tanami mine corridor, and are interpreted to reflect a continental rift succession that was deposited around 1,800 Ma, with an early Archean sedimentary provenance. Steep S to SE dipping F4-fold structures of Tanami and Ware Group metasedimentary rocks, many spatially associated with 1,825–1,790 Ma granitoid intrusions, indicate a period of SSE-directed regional shortening (D4) syn-to-post the regional granitoid intrusive phase. A network of N to NW striking faults, several of which are interpreted as oblique thrusts with a component of left lateral movement, indicates a period of D5 convergence during WSW–ENE to E–W directed shortening. The Tanami mine corridor fault system comprises a network of N, NE to ENE striking D5 faults that merge with N to NW striking faults and probably accommodated movement between granite core domains. D5 faulting is associated with the main phase of gold mineralization in suitable structural–lithological traps. The Paleoproterozoic basement of the Tanami Region is unconformably overlain by quartz sandstone, lithic arenite, and conglomerate of the Pargee Sandstone. Pargee Sandstone may represent syn-tectonic sedimentation related to the 1,730 Ma Strangways Orogeny, and is unconformably overlain by the late Paleoproterozoic platform cover succession of the Birrindudu Group. The Paleoproterozoic basement and cover sequences have subsequently undergone several episodes of faulting, collectively termed D6+. The Paleoproterozoic evolution of the Tanami Region is interpreted to have occurred in an intracratonic setting, but was fundamentally influenced by tectonic events in the adjacent Halls Creek Orogen (1,835–1,805 Ma Halls Creek Orogeny) and Arunta Region (1,815–1,800 Ma Stafford Event). The boundaries between the Tanami Region and Kimberley Region to the northwest and the Arunta Region to the southeast are transitional, and are largely defined by the presence or absence of identifiable Dead Bullock Formation.
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References
Adams GJ (1997) Structural evolution and ore genesis of The Granites gold deposits, Northern Territory. Unpublished PhD thesis, University of Adelaide, Australia
Adams GJ, Both RA, James P (2006) The Granites gold deposits, Northern Territory, Australia: evidence for an early syn-tectonic ore genesis. Miner Deposita (in press). doi: 10.1007/s00126-006-0110-6
Bagas L, Huston DL, Anderson J (2006) Gold deposits in the Paleoproterozoic Tanami Group, Western Australia. Miner Deposita (in press)
Blake DH (1974) Shallow stratigraphic drilling in The Granites-Tanami Region, Northern Territory and Western Australia, 1971–1973. Bureau of Mineral Resources, Australia, Canberra, Record 1974/104
Blake DH, Hodgson IM, Smith PA (1972) Geology of the Birrindudu and Tanami 1:250 000 sheet areas, Northern Territory. Report on the 1971 field season. Bureau of Mineral Resources, Australia, Canberra, Record 1972/92
Blake DH, Hodgson IM, Muhling PC (1973) Geology of The Granites and Precambrian parts of Billiluna, Lucas And Stansmore 1:250 000 sheet areas, Northern Territory and Western Australia. Bureau of Mineral Resources, Australia, Canberra, Record 1973/171
Blake DH, Hodgson IM, Smith PA (1975) Geology of the Birrindudu and Tanami 1:250 0000 Sheet Areas, Northern Territory. Bureau of Mineral Resources, Australia, Canberra, Report 174
Blake DH, Hodgson, IM, Walton DG, Muhling PC (1976) The Granites, Northern Territory (First Edition). Australia 1:250 000 Geological series, SF52-03. Bureau of Mineral Resources, Australia, Canberra
Blake DH, Hodgson IM, Muhling PC (1979) Geology of The Granites-Tanami Region. Bureau of Mineral Resources, Australia, Canberra, Bulletin 197
Blake DH, Tyler IM, Warren RG (2000) Gordon Downs (Second edition) 1:250 000 geological series, explanatory notes. Australian Geological Survey Organisation, Canberra and Geological Survey of Western Australia, Perth (National Geoscience Mapping Accord)
Bodorkos S, Sandiford M, Oliver NHS, Cawood PA (2002) High-T, low-P metamorphism in the Palaeoproterozoic Halls Creek Orogen, northern Australia: the middle crustal response to a mantle-related transient thermal pulse. J Metamorph Geol 20:217–237
Claoué-Long J, Cross AJ, Smith J (2001) NTGS-AGSO Geochronology Project, Report 4. AGSO Record 2001/06
Claoué-Long J, Fraser G, Huston D, Neumann N, Worden K (2005) Towards a correlation of the earliest Proterozoic evolution in central Australia. Annual Geoscience Exploration Seminar (AGES) Record of abstracts, Northern Territory Geological Survey Record 2005-001
Collins WJ, Shaw RD (1995) Geochronological constraints on orogenic events in the Arunta Inlier, a review. Precambrian Res 71:315–346
Cooper JA, Ding PQ (1997) Zircon ages constrain the timing of deformation events in the The Granites-Tanami region, northwest Australia. Aust J Earth Sci 44:777–787
Crispe AJ (2006) The Granites, Northern Territory (Second Edition), 1:250 000 scale geological map, SF52-03. Northern Territory Geological Survey, Darwin (in press)
Crispe AJ, Vandenberg LC (2004) Northern Tanami: findings from reconnaissance mapping 2003. Annual Geoscience Exploration Seminar (AGES) Record of abstracts, Northern Territory Geological Survey Record 2004-001
Cross AJ, Crispe AJ (2006) SHRIMP U-Pb analyses of detrital zircon: a window to understanding the early Palaeoproterozoic development of the Tanami Basin, Northern Australia. Miner Deposita (in press). doi: 10.1007/s00126-102-6
Cross AJ, Fletcher IR, Crispe AJ, Huston DL, Williams N (2005) New constraints on the timing of deposition and mineralization in the Tanami Group. Annual Geoscience Exploration Seminar (AGES) Record of abstracts, Northern Territory Geological Survey Record 2005-001
Cutovinos A, Beier PR, Kruse PD, Abbott ST, Dunster JN, Brescianini RF (2002) Limbunya, Northern Territory (2nd edn). 1:250 000 geological map series explanatory notes, SE 52-07. Northern Territory Geological Survey, Darwin
Dean AA (2001) Igneous rocks of the Tanami Region. Northern Territory Geological Survey Record 2001-003
Ding PQ, Giles CW (1993) Geological setting of gold mineralization in the Tanami Region, Northern Territory, Australia. In: Proceedings of the International symposium of gold mining technology, Beijing, June 1993, pp 15–17
Donnellan N, Hussey KJ, Morrison RS (2001) Short Range, Northern Territory. 1:100 000 geological map series explanatory notes, 5659. Northern Territory Geological Survey, Darwin
Fraser G (2002) Timing of regional tectonism and Au-mineralization in the Tanami Region: 40Ar/39Ar geochronological constraints. Annual Geoscience Exploration Seminar (AGES) Record of abstracts, Northern Territory Geological Survey Record 2002-003
Fraser G (2003) Geological relationships between the Tanami and Northern Arunta Regions: evidence from 40Ar/39Ar geochronology. Annual Geoscience Exploration Seminar (AGES) Record of abstracts, Northern Territory Geological Survey Record 2003-001
Garnaut K (1995) Geochemical classification of the mafics in The Granites-Tanami Inlier and their implication for the region’s evolution. B.Sc.(Hons) thesis (unpublished), University of Adelaide, Australia
Green MH (2004) Gold Prospectivity in the Northern Arunta Region: extrapolating from the Tanami Deposits. Annual Geoscience Exploration Seminar (AGES 2004) Record of abstracts, Northern Territory Geological Survey Record 2004-001
Griffin TJ, Page RW, Sheppard S, Tyler IM (2000) Tectonic implications of Palaeoproterozoic post-collisional, high-K felsic igneous rocks from the Kimberley region of northwestern Australia. Precambrian Res 101:1–23
Hendrickx MA, Slater KR, Crispe AJ, Dean AA, Vandenberg LC, Smith JB (2000a) Palaeoproterozoic stratigraphy of the Tanami Region: regional correlations and relation to mineralization—preliminary results. Northern Territory Geological Survey Record 2000-13
Hendrickx MA, Vandenberg LC, Crispe AJ, Dean AA (2000b) McFarlane (First Edition) 1:100 000 Surface geology map, 4757. Northern Territory Geological Survey, Darwin, Australia
Hodgson IM (1976) The Granites 1:250 000 Geological series—explanatory notes. Bureau of Mineral Resources, Australia, Canberra
Huston DL, Vandenberg L, Wygralak A, Mernagh T, Bagas L, Crispe A, Lambeck L, Cross A, Fraser G, Williams N, Worden K, Meixner T, Goleby B, Jones L, Lyons P, Maidment D (2006) Lode-gold mineralization in the Tanami Region, northern Australia. Miner Deposita (in press). doi: 10.1007/s00126-006-0106-2
Ireland TJ, Mayer TE (1984) The geology and mineralization of the Granites gold deposits, Northern Territory. In: Darwin Conference, Australasian Institute of Mining and Metallurgy, Darwin pp 397–406
Lally J, Worden K (2004) Geochronology in the Pine Creek Orogen—new results from NTGS. Annual Geoscience Exploration Seminar (AGES 2004) Record of Abstracts, Northern Territory Geological Survey Record 2004-001
Lambeck A (2004) Sequence stratigraphy interpretation at Callie Mine, Tanami Desert, Northern Territory. Geoscience Australia Professional Opinion 2004/03, pp 23
Lovett DR, Giles CW, Edmonds W, Gum JC, Webb RJ (1993) The geology and exploration of the Dead Bullock Soak gold deposits, The Granites-Tanami Goldfield NT. In: Proceedings of AusIMM centenary conference, The Australian Institute of Mining and Metallurgy, Melbourne, 1993, pp 73–80
Mayer TE (1990) The Granites gold field. In: Hughes FE (ed) Geology of the mineral deposits of Australia and Papua New Guinea. The Australasian Institute of Mining and Metallurgy, Melbourne, pp 719–724
Meixner T, Lane R (2005) 3D inversion of gravity and magnetic data for the Tanami region. Annual Geoscience Exploration Seminar (AGES 2005) Record of abstracts, Northern Territory Geological Survey Record 2005-001
Myers JS, Shaw RD, Tyler IM (1996) Tectonic evolution of Proterozoic Australia. Tectonics 15:1431–1446
Nicholson PM (1990) Tanami gold deposit. In: Hughes FE (ed) Geology of the mineral deposits of Australia and Papua New Guinea. The Australasian Institute of Mining and Metallurgy, Melbourne, pp 719–724
Page R, Sun S-s, Blake DH (1995) Geochronology of an exposed late Archaean basement terrane in The Granite-Tanami Region. AGSO Res Newsl 22:19–20
Scott J (1993) The structural setting of the Proterozoic gold mineralization at Bunkers Hill open cut mine, The Granites, Northern Territory. BSc (Hons) thesis, University of Adelaide
Scrimgeour IR (2003) Developing a revised framework for the Arunta Region. Annual Geoscience Exploration Seminar (AGES 2003) Record of abstracts, Northern Territory Geological Survey Record 2003-001
Scrimgeour IR (2004) A revised province definition and Palaeoproterozoic framework for the Arunta Region, central Australia. Geological Society of Australia, Abstract, 73:185
Scrimgeour IR, Sandiford M (1993) Early Proterozoic metamorphism at The Granites gold mine, Northern Territory: implications for the timing of fluid production in high-temperature, low-pressure terranes. Econ Geol 88:1099–1113
Sheppard S, Griffin TJ, Tyler IM (1997) Compilation of whole-rock geochemical data for the King Leopold and Halls Creek Orogens. Geological Survey of Western Australia Record 1997/4
Sheppard S, Tyler IM, Griffin TJ, Taylor WR (1999) Palaeoproterozoic subduction-related and passive margin basalts in the Halls Creek Orogen, northwest Australia. Aust J Earth Sci 46:679–690
Slater KR (2000a) Tanami SE 52-15 1:250 000 Integrated interpretation of geophysics and geology. Northern Territory Geological Survey, Darwin, Australia
Slater KR (2000b) THE GRANITES SF 52-3 1:250 000 Integrated interpretation of geophysics and geology. Northern Territory Geological Survey, Darwin, Australia
Smith JB (2001) Summary of results. Joint NTGS-AGSO age determination program 1999-2001. Northern Territory Geological Survey Record 2001-007
Smith MEH, Lovett DR, Pring PI, Sando BG (1998) Dead Bullock Soak gold deposits. In: Berkman DA, Mackenzie DH (eds) Geology of Australian and Papua New Guinean mineral deposits. The Australasian Institute of Mining and Metallurgy, Melbourne, pp 449–460
Traves DM (1955) The geology of the Ord-Victoria region, northern Australia. Bureau of Mineral Resources, Australia, Bulletin 27
Tunks AJ (1996) Structure and origin of gold mineralization, Tanami Mine, Northern Territory. PhD thesis, University of Tasmania, Hobart
Tunks AJ, Cooke D (2006) Geology and structural controls on mineralization at the Tanami Gold Mine. Miner Deposita (in press). doi: 10.1007/s00126-006-0097-z
Tunks AJ, Marsh S (1998) Gold deposits of the Tanami corridor. In: Berkman DA, Mackenzie DH (eds) Geology of Australian and Papua New Guinean mineral deposits. The Australasian Institute of Mining and Metallurgy, Melbourne, pp 443–448
Valenta R, Wall V (1996) Controls on gold mineralization at The Granites, Tanami Desert, Northern Territory. Geol Soc Aust 41:451 (abstract)
Vandenberg LC (2002) Tanami Uncovered: structure of gold deposits in the Tanami- North Arunta Region. In: Applied structural geology for mineral exploration and mining international symposium (Kalgoorlie, Western Australia) Abstract volume. Australian Institute of Geoscientists, Bulletin 36:223–225
Vandenberg LC, Meixner T (2003) The Tanami in 3D. Annual Geoscience Exploration Seminar (AGES) Record of abstracts, Northern Territory Geological Survey, Record 2003-001
Vandenberg LC, Meixner T (2004) The Tanami 3D model—2004 update. Annual Geoscience Exploration Seminar (AGES) Record of abstracts, Northern Territory Geological Survey, Record 2004-001
Vandenberg LC, Crispe AJ, Hendrickx MH, Dean AA, Slater KR (2001a) Geology and mineralization of the Tanami Gold Region. Annual Geoscience Exploration Seminar (AGES) Record of abstracts, Northern Territory Geological Survey Record 2001-006
Vandenberg LC, Hendrickx MH, Crispe AJ (2001b) Structural geology of the Tanami Region. Northern Territory Geological Survey Record 2001-004
Vandenberg LC, Hendrickx MA, Crispe AJ, Slater KR, Dean AA (2001c) Unraveling polydeformed Palaeoproterozoic basement structure of the Tanami gold province, NT: 5% outcrop, 100% geophysics. Geological Society of Australia, Conference Abstracts 64:189
Vandenberg LC, Crispe AJ, Green MG, Johnstone A (2002) Mount Solitaire: Establishing Tanami-Tennant Links. Annual Geoscience Exploration Seminar (AGES) Record of abstracts, Northern Territory Geological Survey Record 2002-0003
Vandenberg LC, Johnstone A, Donnellan N, Green MG, Crispe AJ (2004) Northern Arunta Region Geophysical Interpretation, Northern Territory (First edition) 1:500 000-scale map. Northern Territory Geological Survey, Alice Springs
Waddell DP (1999) Quarterly report for the period ending 30 September, 1999. Tanami Gold N.L. Subiaco, Western Australia
White AJR, Allen CM, Beams SD, Carr PF, Champion DC, Chappell BW, Wyborn D, Wyborn LAI (2001) Granite suites and supersuites of eastern Australia. Aust J Earth Sci 48:515–530
Williams NC (2002) Controls on mineralization at the Callie lode gold deposit, Tanami Desert, Northern Territory. Geoscience Australia Professional Opinion 2002/09, p 41
Williams NC (2006) Controls on mineralization at the world-class Callie gold deposit, Tanami desert, Northern Territory, Australia. Miner Deposita (in press)
Wyborn LAI (1988) Petrology, geochemistry and origin of a major Australian 1,880–1,840 Ma felsic volcano-plutonic suite: a model for intracontinental felsic magma generation. Precambrian Res 40/41:37–60
Wygralak AS, Mernagh TP, Huston DL, Ahmad M (2005) Gold mineral system of the Tanami Region. Northern Territory Geological Survey, Report 18
Zen E-A (1986) Aluminium enrichment in silicate melts by fractional crystallisation: some mineralogic and petrographic constraints. J Petrol 27:1095–1117
Acknowledgements
The authors acknowledge the major contributions of Marc Hendrickx, Kerry Slater, and Alison Dean in the development of the stratigraphic framework, geophysical interpretation, and geological models presented in this report. Interpretation of granite geochemistry was undertaken by Mike Green. High-quality geochronology and scientific input was provided by Andrew Cross, Julie Smith, and Jon Claoue-Long of Geoscience Australia. The authors thank David Huston of Geoscience Australia (North Australian Project co-coordinator) for his significant geological input, numerous discussions and reviews. Tony Meixner of Geoscience Australia is also thanked for his significant input into developing our understanding of three-dimensional geological relationships in the Tanami. Constructive reviews by Ian Tyler and David H Blake are gratefully acknowledged, and we also wish to thank past and present geologists from Newmont Australia, Anglogold, and Otter Gold NL for their cooperation and significant geological input during the course of this project.
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Crispe, A.J., Vandenberg, L.C. & Scrimgeour, I.R. Geological framework of the Archean and Paleoproterozoic Tanami Region, Northern Territory. Miner Deposita 42, 3–26 (2007). https://doi.org/10.1007/s00126-006-0107-1
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DOI: https://doi.org/10.1007/s00126-006-0107-1