 | | Journal (article/letter/editorial) | | Oxidesfromthe GrooteEylandtDeposit, NorthernTerritory,Australia D. DAMMER*, A. R. CI-nVAS**, ANDI. McDougall Research...Australian NationalUniversity, Canberra, A.C.T.0200,Australia Abstract A totalof 51 conventional K-Ardateson22...thisway,the timesof formation of cryptomelane, Ba todorokite, andromanechite (andprobablyalsovernadire) wereestimated...Corrected K-Ar agesshowthatcryptomelane andBa todorokite (thelatterpreviously thoughtto be of diagenetic...Theseages,together ;viththecryptomelane andBa todorokite ages,appearto defineseveral episodes of intensechemical |  | | Journal (article/letter/editorial) | | SupergeneManganeseOxideDeposits, GrooteEylandt,Australia BERNHARDPRACEJUS Rohstofforientierte undUmweltgeologie...stratigraphy-controlled abundance.Cryptomelane,todorokite,romaneehite,and gibbsitcusuallyconcentrate in...depositat Groote Eylandt (Northern 1988a)were the subjectof a detailedsamplingproTerritory of Australia;Fig... $3.00 13 10 SUPERGENEMn DEPOSITS,GROOTE EYLANDT, AUSTRALIA I rock samplesfor trace elements(As...preheatedmould and re- 10 20 I '•'F3( I km ß i Groote Eylandt • F2 Manganiferous calcareous siltstone |  | | Report (Issue volume) | | + 4, Mineral Fe # — of Australia and™ Papua New Guinea ...O02unse Geology of the Mineral Deposits of Australia and Papua New Guinea The COVER PHOTOGRAPH shows...the remnant ovoid Pleistocene Luise Volcano on the east coast of Lihir Island, New Ireland Province, Papua...Economic Geology of Australia Guinea — 1. Metals 6.* Economic Geology of Australia Guinea — 2. Coal 7...Economic Geology of Australia Guinea — 3. Petroleum 8.* Economic Geology of Australia Guinea — 4. Industrial |  | | Book | | come not merely from one district but from a single mine. Thus the physical properties of many rocks and...eclipsing the mineral magnesite in some areas; the trona mine rather than the Solvay plant is now the main source...Mexico to Canada, South Africa to Jordan, and Australia to Sri Lanka. Industrial Minerals also sponsors...part of the Lower Paleozoic ophiolites of the northern Appalachians. The serpentinized ultramafic bodies...chrysotile. One of these bodies is worked at the Advocate Mine near Baie Verte. The canoe-shaped body is contained |  | | Book | | Nostrand Reinhold Australia Pty. Ltd. 17 Queen Street Mitcham, Victoria 3132, Australia Van Nostrand Reinhold...composition between acidic and basic rocks. drift mine Adit(s) driven into gravel. euhedral Characterized...the state (See Map 1-1). The Sierra Nevada gold region is sometimes described as the Mother Lode, a term...five of the more southern counties of the Sierra region - Mariposa, Tuolurnne, Calaveras, Amador, and El...much smaller area covering four counties at the northern end of the Sierra gold belt - Placer, Nevada, | | | Book | | Queen Street 2E7, Canada Australia Pty. Ltd. Mitcham, Victoria 3132, Australia Van Nostrand Reinhold...composition between acidic and basic rocks. drift mine Adit(s) driven into gravel. Characterized by the...side of the state (See J. much more R. Browne region — 1-1). Mother Lode, a The Mother Lode label...part of Map restricted meaning. Nevada gold region is five sometimes described as the of the...much smaller area covering four counties at the northern gold belt — Placer, Nevada, Sierra, the source |  | | Journal (issue) | | ......44 Another New Mlneral from the Big Chief Mine by Martha Llnde .........................66 8 111...our shop. Fire Obsidian Is from a remote mountain region In California. Cutting and polishing Instructions...MATERIALS ARE PRE-SIZED AND TUMBLE-READYI Amethyst, Australia, light color ....................................................... $3.05 per lb. Sapphire, Australia, blue and black mixed, some star included.......Sculptures DUNCAN, Bob-Black Rock Desert Geodes EAST BAY MINERAL SOCIETY METAL BENDERSHandcrafted Jewelry--beglnners |
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