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  5.     <title>UTas ePrints - Timing of orogenic gold mineralisation in northeastern Tasmania: implications for the tectonic and metallogenetic evolution of Palaeozoic SE Australia</title>
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  13.     <meta content="Bierlein, F.P." name="eprints.creators_name" />
  14. <meta content="Foster, D.A." name="eprints.creators_name" />
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  16. <meta content="Davidson, G.J." name="eprints.creators_name" />
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  25. <meta content="Timing of orogenic gold mineralisation in northeastern Tasmania: implications for the tectonic and metallogenetic evolution of Palaeozoic SE Australia" name="eprints.title" />
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  29. <meta content="orogenic gold, Mathina Group, Tasmania, geochronology
  30. ore genesis, slate belt gold, Beaconsfield, Mangana,
  31. Golden Ridge, Lyell field, Ar-Ar dating" name="eprints.keywords" />
  32. <meta content="The original publication is available at www.springerlink.com" name="eprints.note" />
  33. <meta content="New 40Ar/39Ar data from sedimentary rockhosted orogenic gold deposits in northeastern Tasmania constrain most ore formation to between 395 Ma and 385 Ma. These 385-395 Ma ages for the formation of orogenic gold agree well with an inferred Early to Middle Devonian timing for peak deformation and folding across much of northeastern Tasmania. Data from micas within alteration halos in some deposits give dates of ~420-430 Ma; these dates confirm the occurrence of an earlier Silurian phase of deformation and suggest that at least some of the mineralisation was possibly generated during this event. Gold mineralisation hosted by Middle Devonian post-tectonic granites may be genetically related to magmatism following orogeny, but these deposits formed virtually synchronously with peak deformation-related systems. Early to Middle Devonian
  34. deformation in northeastern Tasmania also reactivated
  35. older structures in western Tasmania, and the formation
  36. of quartz vein-hosted gold mineralisation there. Based on
  37. geological, structural, tectonic and metallogenetic similarities, northeastern Tasmania is interpreted as a lateral equivalent of the turbidite-dominated fold-thrust belt of the western Lachlan Orogen. However, unlike Victoria, where the sedimentary rock sequence developed on oceanic crust, northeastern Tasmania was probably underlain
  38. by thinned Proterozoic crust, either as part of a
  39. promontory along the Gondwana margin or as a microcontinental fragment. This may have protected the
  40. Palaeozoic succession from large-scale, pre-Devonian
  41. orogeny, with collision not beginning until the Middle
  42. Devonian. These variations in the structural and tectonic
  43. evolution, and the timing of deformation and ore formation
  44. can explain the difference in contained gold, and
  45. the distribution and number of major orogenic gold
  46. deposits within the Palaeozoic of northeastern Tasmania." name="eprints.abstract" />
  47. <meta content="2005-03" name="eprints.date" />
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  58. <meta content="Baillie PW (1985) A Palaeozoic suture in eastern Gondwanaland. Tectonics 4:653-660.
  59. Banks MR, Smith A (1968) A graptolite from the Mathinna Beds, northeastern Tasmania. Aust J Sci 31:118-119
  60. Berry RF, Crawford AJ (1988) The tectonic significance of Cambrian allochthonous mafic-utramafic complexes in Tasmania. Aust J Earth Sci 35:523-534
  61. Bierlein FP, Crowe DE (2000) Phanerozoic orogenic lode gold
  62. deposits. In: Hagemann SG, Brown PE (eds), Gold in 2000,
  63. Society of Economic Geologists Reviews in Economic Geology
  64. 13. pp 103-139 
  65. Bierlein FP, Arne DC, Keay SM, McNaughton NJ (2001a) Timing
  66. relationships between felsic magmatism and mineralisation in
  67. the central Victorian Gold Province, SE Australia. Aust J Earth Sci 48:883-899
  68. Bierlein FP, Arne DC, Foster DA, Reynolds PR (2001b) A geochronological framework for slate belt-hosted gold mineralisation in central Victoria, Australia. Miner Deposita 36:741-767
  69. Black LP (2001) SHRIMP U-Pb dating. A. Crystallisation ages of Tasmanian granites, and their significance. The geological framework of Tasmania; symposium abstracts AGSO &amp; MRT conference, Hobart, Australia, 13-14 June, pp 14
  70. Black LP, Calver C, SeymourD(2004a) New constraints on age and correlation of Tasmanian Proterozoic successions from
  71. SHRIMP U-Pb detrital zircon dating. Geol Soc Aust Abst 73:55
  72. Black LP, McClenaghan M, Korsch R, Everad J, Calver C, Seymour D, Reed A, Foudoulis C (2004b) Using SHRIMP to
  73. decipher the history of Middle Palaeozoic magmatism in Tasmania. Geol Soc Aust Abst 73:55
  74. Bottrill RS, Huston DL, Taheri J, Zaw K (1992) Gold in Tasmania. Bull Geol Surv Tasmania 70:24-56
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  76. Sutter JF (1986) The fish canyon tuff, a potential standard for the 40Ar39Ar and fission-track dating methods(abstract),
  77. Terra Cognita (sixth international conference on geochronology, cosmochronology and isotope geology) 6:139
  78. Chappell BW, White AJR, Hine R (1988) Granite provinces and
  79. basement terranes in the Lachlan fold belt, southeastern Australia. Aust J Earth Sci 35:505-524
  80. Cocker J (1982) Rb-Sr geochronology and Sr isoope composition of Devonian granitoids, eastern Tasmania. J Geol Soc Aust 29:139-157
  81. Crawford AJ (1988) Cambrian. In: Douglas JG, Ferguson JA (eds), Geology of Victoria. Victorian Divison, Geological Society of Australia, pp. 36-62
  82. Crawford AR, Campbell KS (1973) large-scale horizontal displacement within Australo-Antarctica in the Ordovician. Nature 241:11-14
  83. Crawford AJ, Cameron WE, Keays RR (1984) The association
  84. boninite-low-Ti andesite-tholeiite in the Heathcote Greenstone Belt; ensimatic setting for the early Lachlan Fold Belt. Aust J Earth Sci 31:161-177
  85. Di Vincenzo G, Viti C, Rocchi S (2003) The effect of chlorite interlayering on 40Ar39Ar biotite dating: an 40Ar39Ar laserprobe and TEM investigations of variably chloritised biotites. Contrib Mineral Petr 145: 643-658
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  90. the Tasman-Transantarctic Orogen: evidence for easterly derivation of Tasmania relative to mainland Australia. Geology 20:621-624
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  96. Foster DA, Gray DR, Kwak TAP, Bucher M (1998) Chronology
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  98. Foster DA, Gray DR, Bucher M (1999) Chronology of deformation within the turbidite-dominated Lachlan orogen: Implications for the tectonic evolution of eastern Australia and Gondwana. Tectonics 18:452-485
  99. Foster DA, Gray DR, Spaggiari CV (2004) Timing of subduction
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  101. and the formation of Paleozoic back-arc basins. Bulletin of the Geological Society of America (in press).
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  106. Lachlan Fold Belt: implications for the tectonic evolution of eastern Australia. J Struct Geol 20:1691-1720
  107. Hills PB, MacDonald G, Nero L, Mueller M (2001) Beaconsfield
  108. Gold Mine-Tasmania Reef. In: Reed AR (ed), Structure and
  109. setting of Proterozoic and Palaeozoic rocks in the Tamar region, northern Tasmania, Geological Society of Australia
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  117. for the formation of passive continental margins. Tectonics 10: 1038-1064
  118. MacDonald G, Hills PB, Reed AR, Zengerer M, Morrison KC,
  119. Roach M (2001) Beaconsfield region. In: Reed AR (ed),
  120. Structure and setting of Proterozoic and Palaeozoic rocks in the Tamar region, northern Tasmania, Geological Society of Australia Specialist Group in Tectonics and Structural Geology Field Guide 9, pp. 25-42
  121. McClenaghan MP (2001) The geochemistry of Tasmanian Devonian-Carboniferous granites and implications for the composition of their source rocks. The geological framework of Tasmania; symposium abstracts AGSO &amp; MRT Conference,
  122. Hobart, Australia, 13-14 June, p 17
  123. McClenaghan MP, Higgins N (1993) The age and intrusive relationships of granitoids of the Blue Tier Batholith, NE Tasmania. Mineral Resources Tasmania report 1993/33
  124. McDougall I, Harrison TM (1988) Geochronology and thermochronology by the 40Ar/39Ar method. Monograph No 9, Oxford University Press, Oxford, pp. 212
  125. Meffre S, Berry RF, Hall M (2000) Cambrian metamorphic complexes in Tasmania: tectonic implications. Aust J Earth Sci 47:971-985
  126. Mineral Resources Tasmania (2001) Mineral exploration opportunities in Tasmania-a summary of opportunities for mineral exploration and mineral resource development in Tasmania. Department of Infrastructure, Energy and Resources, Rosny Park, Tasmania, pp 24
  127. Offler R, McKnight SW, Morand V (1998) Tectono-thermal history of the western Lachlan Fold Belt-insights from white mica studies. J Metamorph Geol 16:529-535
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  129. Manzi B, Ryba J, Shepherd RE (2001) Regional metamorphism
  130. of the Mathinna Group, northeast Tasmania. Aust J Earth Sci
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  134. mid-Devonian basin development of the Melbourne Zone,
  135. Lachlan Fold Belt, southeastern Australia. Tectonophysics
  136. 375:9-36
  137. Ramsay WHR, Bierlein FP, Arne DC, VandenBerg AHM (1998)
  138. A review of turbidite-hosted gold deposits, Central Victoria: regional setting, styles of mineralisation and genetic constraints. Ore Geol Rev 13:131-151
  139. Reed AR (2001a) Pre-Tabberabberan deformation in eastern
  140. Tasmania: a southern extension of the Benambran Orogeny.
  141. Aust J Earth Sci 48:785-796
  142. Reed AR (2001b) Increasing gold prospectivity in the west Tamar region, northern Tasmania. The geological framework of Tasmania; symposium abstracts AGSO &amp; MRT conference, Hobart, Australia, 13-14 June 2001, p 11
  143. Reed AR (2002) Formation of lode-style gold mineralisation during Tabberabberan wrench faulting at Lefroy, eastern Tasmania. Aust J Earth Sci 49:879-890
  144. Rickards RB, Davidson G, Banks MR (1993) Silurian (Ludlow)
  145. graptolites from Golden Ridge, NE Tasmania. Assoc Australasian Palaeontol Memoir 15:125-135
  146. Rickards RB, Hills PB, Banks MR, MacDonald G (2002) A new
  147. discovery of Monograptusthomasi (Early Devonian) southwest
  148. of Beaconsfield, Tasmania, and its significance. Pap Proc Roy Soc Tasmania 136:7-16
  149. Roach MJ (1992) Geology and geophysics of the Lisle- Golconda goldfield, northeast Tasmania. Bull Geol Surv Tasmania 70:189-198
  150. Russell DW, van Moort JC (1992) Mineralogy and stable isotope geochemistry of the Beaconsfield, Salisbury and Lefroy goldfields. Bull Geol Surv Tasmania 70:208-226
  151. Smith AG, Hallam A (1970) The fit of the southern continents. Nature 225:139-144
  152. Spaggiari CV, Gray DR, Foster DA, McKnight S (2003) Evolution of the boundary between the western and central Lachlan orogen: implication for Tasmanide tectonics. Aust J Earth Sci 50:725-750
  153. Spaggiari CV, Gray DR, Foster DA (2004) Ophiolite accretion in the Lachlan Orogen, southeastern Australia. J Struct Geol
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  155. Taheri J (1992) Northeast goldfields: a summary of the Tower Hill, Mathinna and Dans Rivulet goldfields. Mineral Resources Tasmania report 1992/10
  156. Taheri J, Bottrill R. (1994) A study of the nature and origin of gold mineralisation, Mangana-Forester area, NE Tasmania. Mineral Resources Tasmania report 1994/05
  157. VandenBerg AHM, Willman CE, Maher S, Simons BA, Cayley
  158. RA, Morand VJ, Taylor DH, Moore D, Radojkovic A (2000)
  159. The Tasman Fold Belt System in Victoria. Geol Surv Vic
  160. Special Publication, Melbourne, pp 462
  161. Zurkic N (1998) Fosterville gold deposits. In: Berkman DA,
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  163. Guinean Mineral Deposits. The Australasian Institute of
  164. Mining and Metallurgy Monograph 22, pp 507-510" name="eprints.referencetext" />
  165. <meta content="Bierlein, F.P. and Foster, D.A. and Gray, D.R. and Davidson, G.J. (2005) Timing of orogenic gold mineralisation in northeastern Tasmania: implications for the tectonic and metallogenetic evolution of Palaeozoic SE Australia. Mineralium Deposita, 39 (8). pp. 890-903. ISSN 0026-4598" name="eprints.citation" />
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  172. <meta content="Davidson, G.J." name="DC.creator" />
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  174. <meta content="New 40Ar/39Ar data from sedimentary rockhosted orogenic gold deposits in northeastern Tasmania constrain most ore formation to between 395 Ma and 385 Ma. These 385-395 Ma ages for the formation of orogenic gold agree well with an inferred Early to Middle Devonian timing for peak deformation and folding across much of northeastern Tasmania. Data from micas within alteration halos in some deposits give dates of ~420-430 Ma; these dates confirm the occurrence of an earlier Silurian phase of deformation and suggest that at least some of the mineralisation was possibly generated during this event. Gold mineralisation hosted by Middle Devonian post-tectonic granites may be genetically related to magmatism following orogeny, but these deposits formed virtually synchronously with peak deformation-related systems. Early to Middle Devonian
  175. deformation in northeastern Tasmania also reactivated
  176. older structures in western Tasmania, and the formation
  177. of quartz vein-hosted gold mineralisation there. Based on
  178. geological, structural, tectonic and metallogenetic similarities, northeastern Tasmania is interpreted as a lateral equivalent of the turbidite-dominated fold-thrust belt of the western Lachlan Orogen. However, unlike Victoria, where the sedimentary rock sequence developed on oceanic crust, northeastern Tasmania was probably underlain
  179. by thinned Proterozoic crust, either as part of a
  180. promontory along the Gondwana margin or as a microcontinental fragment. This may have protected the
  181. Palaeozoic succession from large-scale, pre-Devonian
  182. orogeny, with collision not beginning until the Middle
  183. Devonian. These variations in the structural and tectonic
  184. evolution, and the timing of deformation and ore formation
  185. can explain the difference in contained gold, and
  186. the distribution and number of major orogenic gold
  187. deposits within the Palaeozoic of northeastern Tasmania." name="DC.description" />
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  301.     <h1 class="ep_tm_pagetitle">Timing of orogenic gold mineralisation in northeastern Tasmania: implications for the tectonic and metallogenetic evolution of Palaeozoic SE Australia</h1>
  302.     <p style="margin-bottom: 1em" class="not_ep_block"><span class="person_name">Bierlein, F.P.</span> and <span class="person_name">Foster, D.A.</span> and <span class="person_name">Gray, D.R.</span> and <span class="person_name">Davidson, G.J.</span> (2005) <xhtml:em>Timing of orogenic gold mineralisation in northeastern Tasmania: implications for the tectonic and metallogenetic evolution of Palaeozoic SE Australia.</xhtml:em> Mineralium Deposita, 39 (8). pp. 890-903. ISSN 0026-4598</p><p style="margin-bottom: 1em" class="not_ep_block"></p><table style="margin-bottom: 1em" class="not_ep_block"><tr><td valign="top" style="text-align:center"><a href="http://eprints.utas.edu.au/1903/1/Bierlein%2C_Foster%2C_Gray%2C_Davidson_2005_MINER_DEPOS.pdf"><img alt="[img]" src="http://eprints.utas.edu.au/style/images/fileicons/application_pdf.png" border="0" class="ep_doc_icon" /></a></td><td valign="top"><a href="http://eprints.utas.edu.au/1903/1/Bierlein%2C_Foster%2C_Gray%2C_Davidson_2005_MINER_DEPOS.pdf"><span class="ep_document_citation">PDF</span></a> - Full text restricted - Requires a PDF viewer<br />764Kb</td><td><form method="get" accept-charset="utf-8" action="http://eprints.utas.edu.au/cgi/request_doc"><input value="2398" name="docid" accept-charset="utf-8" type="hidden" /><div class=""><input value="Request a copy" name="_action_null" class="ep_form_action_button" onclick="return EPJS_button_pushed( '_action_null' )" type="submit" /> </div></form></td></tr></table><p style="margin-bottom: 1em" class="not_ep_block">Official URL: <a href="http://dx.doi.org/10.1007/s00126-004-0458-4">http://dx.doi.org/10.1007/s00126-004-0458-4</a></p><div class="not_ep_block"><h2>Abstract</h2><p style="padding-bottom: 16px; text-align: left; margin: 1em auto 0em auto">New 40Ar/39Ar data from sedimentary rockhosted orogenic gold deposits in northeastern Tasmania constrain most ore formation to between 395 Ma and 385 Ma. These 385-395 Ma ages for the formation of orogenic gold agree well with an inferred Early to Middle Devonian timing for peak deformation and folding across much of northeastern Tasmania. Data from micas within alteration halos in some deposits give dates of ~420-430 Ma; these dates confirm the occurrence of an earlier Silurian phase of deformation and suggest that at least some of the mineralisation was possibly generated during this event. Gold mineralisation hosted by Middle Devonian post-tectonic granites may be genetically related to magmatism following orogeny, but these deposits formed virtually synchronously with peak deformation-related systems. Early to Middle Devonian&#13;
  303. deformation in northeastern Tasmania also reactivated&#13;
  304. older structures in western Tasmania, and the formation&#13;
  305. of quartz vein-hosted gold mineralisation there. Based on&#13;
  306. geological, structural, tectonic and metallogenetic similarities, northeastern Tasmania is interpreted as a lateral equivalent of the turbidite-dominated fold-thrust belt of the western Lachlan Orogen. However, unlike Victoria, where the sedimentary rock sequence developed on oceanic crust, northeastern Tasmania was probably underlain&#13;
  307. by thinned Proterozoic crust, either as part of a&#13;
  308. promontory along the Gondwana margin or as a microcontinental fragment. This may have protected the&#13;
  309. Palaeozoic succession from large-scale, pre-Devonian&#13;
  310. orogeny, with collision not beginning until the Middle&#13;
  311. Devonian. These variations in the structural and tectonic&#13;
  312. evolution, and the timing of deformation and ore formation&#13;
  313. can explain the difference in contained gold, and&#13;
  314. the distribution and number of major orogenic gold&#13;
  315. deposits within the Palaeozoic of northeastern Tasmania.</p></div><table style="margin-bottom: 1em" border="0" cellpadding="3" class="not_ep_block"><tr><th valign="top" class="ep_row">Item Type:</th><td valign="top" class="ep_row">Article</td></tr><tr><th valign="top" class="ep_row">Additional Information:</th><td valign="top" class="ep_row">The original publication is available at www.springerlink.com</td></tr><tr><th valign="top" class="ep_row">Keywords:</th><td valign="top" class="ep_row">orogenic gold, Mathina Group, Tasmania, geochronology&#13;
  316. ore genesis, slate belt gold, Beaconsfield, Mangana,&#13;
  317. Golden Ridge, Lyell field, Ar-Ar dating</td></tr><tr><th valign="top" class="ep_row">Subjects:</th><td valign="top" class="ep_row"><a href="http://eprints.utas.edu.au/view/subjects/260100.html">260000 Earth Sciences &gt; 260100 Geology</a></td></tr><tr><th valign="top" class="ep_row">Collections:</th><td valign="top" class="ep_row">UNSPECIFIED</td></tr><tr><th valign="top" class="ep_row">ID Code:</th><td valign="top" class="ep_row">1903</td></tr><tr><th valign="top" class="ep_row">Deposited By:</th><td valign="top" class="ep_row"><span class="ep_name_citation"><span class="person_name">Mrs Katrina Keep</span></span></td></tr><tr><th valign="top" class="ep_row">Deposited On:</th><td valign="top" class="ep_row">12 Sep 2007</td></tr><tr><th valign="top" class="ep_row">Last Modified:</th><td valign="top" class="ep_row">23 Jan 2008 15:46</td></tr><tr><th valign="top" class="ep_row">ePrint Statistics:</th><td valign="top" class="ep_row"><a target="ePrintStats" href="/es/index.php?action=show_detail_eprint;id=1903;">View statistics for this ePrint</a></td></tr></table><p align="right">Repository Staff Only: <a href="http://eprints.utas.edu.au/cgi/users/home?screen=EPrint::View&amp;eprintid=1903">item control page</a></p>
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