Specimen Number39-1-030Alternate Number82-11-2CommentsTuff marker bed (TMB), sharp base/gradational top, cherty with minor pyrite, typically associated with Pb-rich but not Cu-rich beds, similar but thinner to tuff beds seen at McArthur River, zircon U/Pb age date of 1660 +/- 10 my.In Teaching CollectionNoMineral(s)quartzfeldsparpyriteRock NametuffDistrictMt. Isa, AustraliaMineMt. IsaExternal LinkMindatDeposit TypeSedexGeo-Coords[1] Donated ByUniversity of Wisconsin-Madison Department of GeoscienceReference MaterialACL-169: Mathias, B.V. and Clark, G.J., 1976, Mount Isa Copper and Silver-Lead-Zinc Orebodies – Isa and Hilton mines, A.I.M.M. Mon. No. 5, p. 351-372.
ACL-170: Russell, R.E., and Cox, J.L., 1973, Mount Isa Mines Limited Geological Map of Mount Isa District, 1:50,000, Edition 2; Hobart, Australia.
ACL-231: Turner, R.J.W., and Einaudi, M.T., eds, 1986, The Genesis of Stratiform Sediment-Hosted Lead and Zinc Deposits: Conference Proceeding; Stanford Univ. Pub. v. XX, School of Earth Sciences, Stanford, California, 227 p.
39-1-030: tuff - Mt. Isa, Australia District - Mt. Isa Mine. Franklin College Collections, accessed 11/11/2025, https://digitalcollections.franklin.uga.edu/nodes/view/57335