... chimique, allactite, Mn 7 (AsO 4 ) 2 (OH) 8 , et raadeïte, Mg 7 (PO 4 ) 2 (OH) 8 . Abstract Waterhouseite from the Iron Monarch mine, Iron Knob, South Australia, is a new hydroxy manganese phosphate species that has a unique crystal-structure. The mineral was found in a carbonate-rich zone...

...Peter Elliott; Anthony C. Willis Abstract Whiteite-(MnMnMg), is a new jahnsite-group mineral found at the Iron Monarch Quarry, Iron Knob, South Australia, Australia, where it occurs associated with triploidite, rhodochrosite, and an unidentified Ca,Mn phosphate carbonate mineral. The new mineral...

...]. The strongest lines in the X-ray powder pattern are ( d obs , I obs , hkl ) 5.31 (60) (110); 3.39 (100) (121); 2.866 (80) (130); 2.652 (70) (220); 2.491 (60) (221); 1.695 (35) (242); 1.588 (60) (332). The name is for Glyn Francis of Iron Knob, South Australia. Copyright © 1990 by the Mineralogical Society...

... Ga granites and rhyolites of the St. Francois Mountains terrane ( Day et al., 2016 ). Some deposits, such as the Pilot Knob surface hematite, Pilot Knob underground magnetite, Iron Mountain, and Cedar Hill deposits, crop out or are near the surface and were discovered and then mined in the 19 th...

...-alkali alteration systems. Subsequently, all units were dissected by right-lateral, NE-trending transcurrent faults. Other relatively large IOA deposits in the region include Pilot Knob and Iron Mountain ( Fig. 1 ). Magnetite in the lower Pilot Knob deposit was mined from 1965 to 1980 and produced ca...

... Mountains terrane of southeast Missouri ( Fig. 1 ; Kisvarsanyi and Kisvarsanyi, 1989 ). The seven deposits— Boss, Bourbon, Camels Hump, Iron Mountain, Kratz Spring, Pea Ridge, and Lower Pilot Knob—plus smaller deposits, magnetite-hematite veins, and hematite iron formations that occur in the region...

... ), near Pilot Knob, was processed in 1815 ( Lowell and Noll, 2001 ); mining continued in the Ironton area at the Pilot Knob, Cedar Hill, Shepherd Mountain, Russell Mountain, and Iron Mountain deposits ( Fig. 2 ). Small quantities (~2,000 metric tons (t)) of manganese and manganiferous iron ore were mined...

...Alec Trendall Although I disagree with some of their characterization of the Hamersley Group BIFs of Western Australia, my purpose here is only to comment on their use of IF nomenclature and classification. Their adoption of the simple twofold subdivision of IF, as a rock type, into banded iron...

.... Robinson P. ( 2007 ) Magnetic properties and potential field modeling of the Peculiar Knob metamorphosed iron formation, South Australia: an analog for the source of the intense Martian magnetic anomalies? Journal of Geophysical Research , 112 , B03102 , doi: 10.1029/2006JB004495 . Shive...

.... The different omission features include: 1) planar erosional bedding tops, 2) scalloped erosional surfaces, 3) knobs, ridges, and swales at bedding contacts, and 4) paleoscarps. An interpretation is proposed that relates specific styles of omission surface to different diagenetic–depositional processes...

... , Magnetic properties and potential field modeling of the Peculiar Knob metamorphosed iron formation, South Australia: An analog for the source of the intense Martian magnetic anomalies? : Journal of Geophysical Research , v. 112 , no. B03102 , doi: 10.1029/2006JB004495 . Seeger C.M. , 2001...

...) describe the mineralogy of the greenish “serpentine” at Pilot Knob. They conclude that the greenish material found at Pilot Knob is not serpentine, but a clay mineral largely of the nontronite-saponite series of iron-magnesium smectites. A composite stratigraphic section of the Austin area between...

... of variability in the 0.53 µm band depth parameter rather than crystalline iron oxides; however, certain locations in the sediments and the central ring knobs have absorptions that may indicate a crystalline Fe oxide phase. In image FRT0001187B, there are also several small locations (<250 × 250 m) within...

... and Metallurgical Engineering, Yazd University, Yazd 89195741, Iran 5Research School of Earth Sciences, Australian National University, Canberra, ACT 0200, Australia *E-mail: [email protected] Aftabi and Mohseni (2020) argue that the magnetite deposits studied by Peters et al. (2020) are banded iron...

... and hydrogen as well as boron isotope ratios ( Trumbull et al. 2010 ). F igure 1 Schematic diagram showing tectonic settings of tourmaline-bearing hydrothermal ore deposits. Abbreviations: SEDEX, sedimentary-exhalative; VMS, volcanogenic massive sulfide; IOCG, iron oxide–copper–gold. M odified from...

... , 87 , https://doi.org/10.1180/mgm.2023.76 IMA No. 2023-047 Cloudite BaFe 3+ 3 (PO 4 )(SO 4 )(OH) 6 Cud Iron Monarch quarry (180 level), Iron Knob, Middleback Range, Eyre Peninsula, South Australia, Australia (32°44’40” S, 137°08’21” E) Peter Elliott* and Anthony R. Kampf...

... relatively strong hydration. We only have two measurements of the darker wall material, but the mean is lower in silicon (54–66 wt% SiO 2 ) and higher in iron (6–17 wt% total Fe as FeO); magnesium is consistently low in both materials (≤2.1 wt% MgO), while the alkalies are consistently high (3.3–5.6 wt% Na 2...

... in epithermal and hydrothermal manganese deposits. Furthermore, pyrophanite was found associated with metamorphosed zinc- and manganese-rich deposits. Occasionally it has been encountered in banded iron formation. Pyrophanite may also occur associated with gneisses, granitic rocks, alkaline complexes...

... hematite from the Shepherd Mountain workings near Pilot Knob (Fig. 1 ). Major surface hematite ore, discovered at Pilot Knob and Iron Mountain during 1845–50, initiated production that continues today. Geophysical prospecting in the 1960s revealed large subsurface magnetite deposits at Pea Ridge, Pilot...

... National University, PO Box 4, Canberra, A.C.T. 2600, Australia. J. geol. Soc. London, Vol. 137, 1980, pp. 765-771, 3 figs. Printed in Northern Ireland Petrology of iron- and phosphorus-rich nodules from the E Australian continental shelf J. F. Marshall & P. J. Cook SUMMARY. Phosphatic-glauconitic...