 | Li, Chusi, Ripley, Edward M., Oberthür, Thomas, Miller, James D., Joslin, Gregory D. (2008) Textural, mineralogical and stable isotope studies of hydrothermal alteration in the main sulfide zone of the Great Dyke, Zimbabwe and the precious metals zone of the Sonju Lake Intrusion, Minnesota, USA. Mineralium Deposita, 43 (1) 97-110 doi:10.1007/s00126-007-0159-x | Journal (article/letter/editorial) | | the precious metals zone of the Sonju Lake Intrusion, Minnesota, USA Chusi Li & Edward M. Ripley & Thomas...Dyke and the precious metals zone of the Sonju Lake Intrusion have, in part, been attributed to the interaction...component was involved in the alteration of the Sonju Lake Intrusion. The strong spatial association of platinum-...Sciences, Indiana University, Bloomington, IN 47405, USA e-mail: cli@indiana.edu C. Li China University of...Germany J. D. Miller Jr Minnesota Geological Survey, St. Paul, MN 55114, USA J. D. Miller Jr : G. D. |  | Park, Y.-R., Ripley, E. M., Miller, J. D., Li, C., Mariga, J., Shafer, P. (2004) Stable Isotopic Constraints on Fluid-Rock Interaction and Cu-PGE-S Redistribution in the Sonju Lake Intrusion, Minnesota. Economic Geology, 99 (2) 325-338 doi:10.2113/gsecongeo.99.2.325 | Journal (article/letter/editorial) | | and Cu-PGE-S Redistribution in the Sonju Lake Intrusion, Minnesota YOUNG-ROK PARK,* EDWARD M. RIPLEY,†...MILLER, JR., Minnesota Geological Survey, 2646 University Avenue West, St. Paul, Minnesota 55114-1057 ...Abstract The Sonju Lake intrusion, part of the 1.1 Ga Midcontinent rift-related Beaver Bay Complex, is a 1...sequence of mafic cumulates located in northeastern Minnesota. Basal melatroctolite and dunite layers are overlain...apatite diorite. Disseminated sulfides in the intrusion have δ34S values that range from –2.2 to 3 per |  | | Journal (article/letter/editorial) | | Old Main, 1 University Dr., Pembroke, NC 28372, USA; chaumba@uncp.edu Received: 24 May 2017; Accepted:...Great Dyke, Bushveld Complex in South Africa, the Stillwater Complex in Montana, USA, and the Noril’sk Ni-Cu-(PGE)...Bushveld Complex [7] and in the J-M reef of the Stillwater Complex [8–11]. In the Stillwater Complex, researchers...intrusions. It is a layered mafic-ultramafic intrusion that cuts across the Zimbabwe Archean craton (Figure...this process were reported in the Munni Munni intrusion of Western Australia [51,52]. Although the MSZ |  | | Journal (article/letter/editorial) | | AND STRUCTURE OF THE DULUTH COMPLEX PAUL W. WEIBLEN and G. B. MOREY Minnesota Geological Survey, 1633 Eustis...Eustis Street, Saint Paul, Minnesota 55108 ABSTRACT. The Duluth Complex consists of an extensive cap of...Minor peridotite is exposed at the base of the complex near Duluth. Felsic rocks occur as small intrusions...control on the mode of emplacement of the Duluth Complex. Evolution of half-graben structures also provides...the Midcontinent Rift. INTRODUCTION The Duluth Complex, a large body of dominantly mafic igneous rocks |  | Li, C., Ripley, E. M., Merino, E., Maier, W. D. (2004) REPLACEMENT OF BASE METAL SULFIDES BY ACTINOLITE, EPIDOTE,CALCITE, AND MAGNETITE IN THE UG2 AND MERENSKY REEF OF THE BUSHVELDCOMPLEX, SOUTH AFRICA. Economic Geology, 99 (1) 173-184 doi:10.2113/gsecongeo.99.1.0173 | Journal (article/letter/editorial) | | MAGNETITE IN THE UG2 AND MERENSKY REEF OF THE BUSHVELD COMPLEX, SOUTH AFRICA CHUSI LI,† EDWARD M. RIPLEY, ENRIQUE...and the Merensky reef in the western Bushveld Complex has produced four common replacements: (1) replacement...Introduction The UG2 and Merensky reef of the Bushveld Complex are the major sources of platinum group elements...UG2 and Merensky reef of the western Bushveld Complex. Replacement reactions are proposed that are directly...Geologic Background The Bushveld Complex is a layered mafic-ultramafic intrusion with a surface exposure over |  | | Journal (article/letter/editorial) | | Sierra Foothills gold province, central California, USA: A GIS-based reconnaissance prospectivity analysis—F...2007 39 Vol. 247, No. 1–2, 2008 Deposition of talc—kerolite–smectite—smectite at seafloor hydrothermal...skarn and its associated plutonic rocks, Heffley Lake, south-central British Columbia—G.E. Ray and I.C...copper-gold-type polymetallic mineralization in the Contact Lake belt, Great Bear Magmatic zone, Northwest Territories...pathways for arsenic release in a coastal watershed, USA—N.K. Foley and R.A. Ayuso Anthropogenic and natural |  | | Journal (article/letter/editorial) | | Series in the Vurechuaivench Massif, Monchegorsk Complex, Kola Region T. V. Rundqvista, *, P. V. Pripachkina...massif is part of the Paleoproterozoic Monchegorsk Complex, composed of layered rock series: gabbronorite...rocks. Keywords: Monchegorsk Complex, Vurechuaivench massif, layered intrusion, basic rock, plagioclase,...situated in the contact zone of the Monchegorsk Complex and Paleoproterozoic Imandra–Varzuga paleorift...cumulative crystals partly affected by replacement by talc and amphibole along fractures. Single grains of |  | | Journal (article/letter/editorial) | | Twilight, and High Grade Zones of the Lac des Iles Complex, Ontario, Canada Moïse Lionnel N. Djon & Sarah-Jane...Springer-Verlag 2012 Abstract The Lac des Iles Complex hosts Pd deposits with unusually high Pd/Pt and...North American Palladium, 556 Tenth Avenue, Thunder Bay, ON P7B 2R2, Canada e-mail: lionnil2002@yahoo.fr...Introduction The palladium deposits of the Lac des Iles Complex (LDIC) in north-western Ontario (Fig. 1a) differ...Bushveld Complex: Viljoen 1999; Von Gruenewaldt et al. 1986, the JM reef of the Stillwater Complex: Zientek |  | | Book | | tpa/d SIC SUC USGS/USBM Bushveld Igneous Complex Complex Department of Mines and Geology Department...annum/day Sudbury/Stillwater Igneous Complex Sukinda Ultramafic Complex United States Geological Survey/...perfect circular, 8-km diameter Kondyor Massif intrusion in Russia. Platinum is often found in mining of...colored compounds, and an ability to form stable complex ions. The electrons they use to combine with other...sources of iridium are in the Bushveld igneous complex in South Africa, the large copper–nickel deposits |  | Jesus, A.P., Mateus, António, Benoit, Mathieu, Tassinari, C.C.G., Bento dos Santos, Telmo (2020) The timing of sulfide segregation in a Variscan synorogenic gabbroic layered intrusion (Beja, Portugal): Implications for Ni-Cu-PGE exploration in orogenic settings. Ore Geology Reviews, 126. 103767pp. doi:10.1016/j.oregeorev.2020.103767 | Journal (article/letter/editorial) | | segregation in a Variscan synorogenic gabbroic layered intrusion (Beja, Portugal): Implications for Ni-Cu-PGE exploration...ABSTRACT Keywords: Beja gabbro Synorogenic layered intrusion magmatic sulfides, PGE depletion Sr-Nd-Pb-S isotopes...layered suite, the Marginal Sulfides located at a complex domain where the LGS is intruded by late magmatic...late-magmatic systems developed during uplift and intrusion by evolved, lower-crustal contaminated magmas...for Ni-Cu sulfide ores (e.g. Noril’sk, Voisey’s Bay; Naldrett, 2004). On the contrary, orogenic belts |  | | Book | | Elemental Geochemistry of the Xiadong Alaskan-Type Complex in the Southern Central Asian Orogenic Belt Reprinted...Midcontinent Rift-Related Echo Lake Intrusion in Northern Michigan, USA Reprinted from: Minerals 2019...Oxidized Ores into Placers: Case Studies Bushveld Complex, South Africa, and Great Dyke, Zimbabwe Reprinted...ophiolite, stratiform complexes and Ural-Alaskan type intrusion, and sulfides deposits and sulphide deposits in...description of PGM from China, Russia, South Africa, USA, and Zimbabwe are reported. In his contribution, |  | | Report (issue) | | in the lower left include the shaft, the mill complex, and offices. Photograph by Michael L. Zientek...showing the Rustenburg Layered Suite of the Bushveld Complex, South Africa, the surface trace of significant...Karee Mine in the western part of the Bushveld Complex, South Africa....................................Geologic map and cross section of the Stillwater Complex, Montana...........................N19 Photograph...geology along the western margin of the Duluth Complex, Minnesota, with the surface projection of nickel–c |  | | Journal (article/letter/editorial) | | Merensky Reef at Rustenburg (western Bushveld Complex, South Africa) ALEXANDER KAWOHL1,* AND HARTWIG...Reef. K E Y WO R D S : Merensky Reef, Bushveld Complex, platinum-group minerals, troilite, isoferroplatinum...in South Africa’s world famous Bushveld Igneous Complex averages at normal mining thickness (∼90 cm) 5...reef are nearly constant along the whole Bushveld Complex, the PGM assemblages are, even at a local scale...chamber beneath the Bushveld Complex or in feeders, followed by the intrusion of a PGEenriched crystal mush |  | | Book | | Open Magma Chamber: The Newark Island Layered Intrusion, Labrador, Canada a MGTePOry A. SHYOCr and Ey...Baltic Shield: Evidence from the Mafic Drusite Complex, Belomorian Mobile Belt, Russia — Evgenii V. Sharkov...Hypabyssal Rocks of the Midcontinent Rift System in Minnesota, and Implications for a Keweenawan Magmatic “Family...cabin on a lake outside Knoxville. He also might occasionally sneak his boat out onto the lake to fish for...Fe/Si relations for Kaapvaal peridotites are more complex (Fig. 5B). There is wide overall scatter in this |  | | Journal (article/letter/editorial) | | Abstract In the Great Dyke mafic/ultramafic layered intrusion of Zimbabwe, economic concentrations of platinum-group...2,575.4±0.7-Ma-old mafic/ ultramafic layered intrusion that strikes NNE over 550 km with a width of 4–11...oxide ores at the Zimplats concession (Hartley Complex) are given as 138 Mt at 3.4 g/t 4E (Pt + Pd + Rh...amphibole, anthophyllite, magnetite, serpentine, talc, and chlorite). Fig. 3 Relative gains and losses...forming an assemblage of hydrosilicates, mainly talc, chlorite (pycnochlorite and diabanite), amphibole |  | | Book | | whom I have explored and experienced the Bushveld Complex, and the many associates elsewhere who have shown...River in the Upper Critical Zone of the Bushveld Complex. Chromitite layers in anorthosite frequently bifurcate...critical topics and types of layered igneous intrusion, for which in 1993 he provided a stimulus through...Deer's classic 1939 memoir on the Skaergaard Intrusion, was thereafter recognized as a major influence...differences from a study of the Rum layered ultrabasic intrusion in the 1950s. There, an "open system" was proposed |  | Ciborowski, T. Jake R., Kerr, Andrew C., McDonald, Iain, Ernst, Richard E., Minifie, Matthew J. (2013) The geochemistry and petrogenesis of the Blue Draw Metagabbro. Lithos, 174. 271-290 doi:10.1016/j.lithos.2012.06.035 | Journal (article/letter/editorial) | | western South Dakota, is an 800 m thick, layered intrusion, which is interpreted to have been intruded as...BDM are similar to those recorded by the East Bull Lake Suite of layered intrusions in Southern Ontario...sets of intrusions are cogenetic. The East Bull Lake Suite intrusions are relatively well studied and...Chemostratigraphic profiles through the BDM show that the intrusion is the product of at least two magma pulses which...which grade from peridotitic at the base of the intrusion to gabbronoritic at the upper margin. Closed-system |  | Beinlich, Andreas, von Heydebrand, Adrian, Klemd, Reiner, Martin, Laure, Hicks, John (2020) Desulphurisation, chromite alteration, and bulk rock PGE redistribution in massive chromitite due to hydrothermal overprint of the Panton Intrusion, east Kimberley, Western Australia. Ore Geology Reviews, 118. 103288 doi:10.1016/j.oregeorev.2019.103288 | Journal (article/letter/editorial) | | chromitite due to hydrothermal overprint of the Panton Intrusion, east Kimberley, Western Australia Andreas Beinlich...chromitite due to hydrothermal overprint of the Panton Intrusion, east Kimberley, Western Australia, Ore Geology...chromitite due to hydrothermal overprint of the Panton Intrusion, east Kimberley, Western Australia Andreas Beinlich1...The 1856±2 Ma layered mafic–ultramafic Panton Intrusion of the Central Zone contains a reef-type platinum-group...plasma mass spectrometry (LA-ICP-MS) data reveal complex chemical zoning of the chromite reflecting post-magmatic |  | | Journal (article/letter/editorial) | | (GNPA) member, south of Mokopane, northern Bushveld Complex, South Africa J. W. Smith*1, D. A. Holwell1 and...package located in the northern limb of the Bushveld Complex, south of the town of Mokopane. On the farm Rooipoort...Grasvally it overlies Lower Zone rocks of the Bushveld Complex. The GNPA member is divided into three units; the...secondary sulphide assemblages. Keywords: Bushveld Complex, Northern limb, GNPA member, Platinum-group elements...06 Ga Bushveld Complex in South Africa is the world’s largest layered igneous intrusion covering an area |  | Maier, W.D., Määttää, S., Yang, S., Oberthür, T., Lahaye, Y., Huhma, H., Barnes, S.-J. (2015) Composition of the ultramafic–mafic contact interval of the Great Dyke of Zimbabwe at Ngezi mine: Comparisons to the Bushveld Complex and implications for the origin of the PGE reefs. Lithos, 238. 207-222 doi:10.1016/j.lithos.2015.09.007 | Journal (article/letter/editorial) | | Zimbabwe at Ngezi mine: Comparisons to the Bushveld Complex and implications for the origin of the PGE reefs...Zimbabwe at Ngezi mine: Comparisons to the Bushveld Complex and implications for the origin of the PGE reefs...at Ngezi T mine: Comparisons to the Bushveld Complex and implications for the origin of the PGE reefs...second largest platinum resource after the Bushveld Complex. Isotopic and trace element data from the interval...less enriched composition than in the Bushveld Complex (Great Dyke: Sri 0.7024-0.7028, εNd mostly -1 to |  | | Book | | CASE HISTORIES 15. Fedorov-Pana layered mafic intrusion, (Kola Peninsula, Russia): approaches, methods...369-390 18. Discovery of the J-M Reef, Stillwater Complex, Montana: the role of soil and silt platinum and...409-429 20. The Platinova Reef of the Skaergaard intrusion T.F.D. Nielsen, J.C.O. Andersen, C.K. Brooks ...BUSHVELD COMPLEX UG2 Chromitite Merensky Reef STILLWATER COMPLEX GREAT DYKE MUNNI MUNNI INTRUSION SKAERGAARD...SKAERGAARD INTRUSION CONTRASTS AND COMPARISONS Stratigraphic Association Mineral Compositions Within-Reef |  | Piña, R., Gervilla, F., Barnes, S.-J., Oberthür, T., Lunar, R. (2016) Platinum-group element concentrations in pyrite from the Main Sulfide Zone of the Great Dyke of Zimbabwe. Mineralium Deposita, 51 (7) 853-872 doi:10.1007/s00126-016-0642-3 | Journal (article/letter/editorial) | | platinum-group elements (PGE) after the Bushveld Complex in South Africa. The sulfide assemblage of the...second largest resource of PGE after the Bushveld Complex in South Africa (Naldrett 2011; Zientek 2012),...11-km wide linear, mafic, and ultramafic layered intrusion that was emplaced into Archean granites and greenstone...are very minor (<5 wt%) and include actinolite, talc, chlorite, epidote, and carbonates. In the disseminated...et al. (2009) in the UG-2 reef of the Bushveld Complex, South Africa. Py2 forms small individual euhedral |  | | Report (issue) | | Front cover (clockwise starting at top left). Dry Lake Wind Power Project. This 63-megawatt-capacity facility...solubility of fluorite as a function of temperature for complex Na-Ca-Mg-Cl brines from ambient temperatures to...subsurface geology of the Saint-Honoré carbonatite complex in southern Quebec, Canada, and a schematic north-south...Schematic cross-section of the Lovozero alkaline intrusion, Kola Peninsula, Russia, showing the relation...showing the Rustenburg Layered Suite of the Bushveld Complex, South Africa, the surface trace of significant |  | | Book (edition) | | OX5 1 GB, UK 225 Wyman Street, Waltham, MA 02451, USA Copyright © 2015, 2008 Elsevier B.V. All rights reserved...phases (medium grey). Twinning Simple to very complex twinning occurs in numerous minerals, with 4 major...and complex twinning can be observed in adjacent grains. Left: Simple (upper right) and complex (lower...(1991) states, “Ore deposits belong to the most complex inorganic features of our planet. If this complexity...occur in titanomagnetite. In other cases, more complex shapes develop. Right: Finely lamellated and spindle-like |  | | Report (issue) | | Africa Leoben, Austria Sudbury, Ontario Duluth, Minnesota Apatiti, Russia Toronto, Ontario Perth, Australia...and offset environments of the Sudbury Igneous Complex have made PGE the focus of new exploration in this...(Ontario), the Marathon deposit in the Coldwell Complex (Ontario), and the formerly producing Salt Chuck...gabbros, cover another aspect of the Coldwell Complex mineralization. The mineralization they describe...several intrusions. These include the East Bull Lake, Agnew Lake, and River Valley intrusions, as well as the |
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