 | Maes, S.M., Tikoff, B., Ferré, E.C., Brown, P.E., Miller Jr., J.D. (2007) The Sonju Lake layered intrusion, northeast Minnesota: Internal structure and emplacement history inferred from magnetic fabrics. Precambrian Research, 157 (1) 269-288 doi:10.1016/j.precamres.2007.02.021 | Journal (article/letter/editorial) | | Research 157 (2007) 269–288 The Sonju Lake layered intrusion, northeast Minnesota: Internal structure and emplacement...University of Wisconsin-Madison, Madison, WI 53706, USA b Department of Geology, Southern Illinois University-Carbondale...62901, USA c Minnesota Geological Survey, University of Minnesota-Duluth, Duluth, MN 55812, USA Received...Abstract The Sonju Lake intrusion (SLI), in northeastern Minnesota, is a layered mafic complex of Keweenawan...paragenesis of the intrusion is recognized as broadly similar to the Skaergaard intrusion, a classic example |  | 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 |  | 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. |  | | Journal (article/letter/editorial) | | Hypabyssal Rocks of the Midcontinent Rift System in Minnesota, and Implications for a Keweenawan Magmatic “Family...Hypabyssal Rocks of the Midcontinent Rift System in Minnesota, and Implications for a Keweenawan Magmatic “Family...Hypabyssal Rocks of the Midcontinent Rift System in Minnesota, and Implications for a Keweenawan Magmatic "Family...Midcontinent Rift along the Min nesota shore of Lake Superior are a distinct suite within the rock associations...deeper (~10 kbar). Resorption features seen in plagioclase phenocrysts are evidence for magmatic evolution |  | | Journal (article/letter/editorial) | | Midcontinent Rift-Related Echo Lake Intrusion in Northern Michigan, USA Alexander James Koerber and Joyashish...University, 1903 W Michigan Ave, Kalamazoo, MI 49008, USA; alexander.j.koerber@wmich.edu * Correspondence:... Abstract: The Echo Lake intrusion in the Upper Peninsula (UP) of Michigan, USA, was formed during the...Troctolite is the predominant rock unit in the intrusion, with interlayered bands of peridotite, mafic...deposits, such as the Sonju Lake deposit in northern Minnesota. Keywords: Echo Lake; Midcontinent; palladium; |  | | Journal (article/letter/editorial) | | differentiation in bimodal suites: application to the Sonju Lake Intrusion–Finland granite system (MN) C. C. Lundstrom...differentiation in bimodal suites: application to the Sonju Lake Intrusion–Finland granite system (MN), International...differentiation in bimodal suites: application to the Sonju Lake Intrusion–Finland granite system (MN) C. C. Lundstrom...Champaign, Champaign, IL, USA ABSTRACT ARTICLE HISTORY The Sonju Lake Intrusion (SLI) is a 1200-meter...1200-meter thick layered mafic intrusion that directly underlies an equally large silicic pluton, the Finland granophyre |  | | Journal (article/letter/editorial) | | Formation of the PGE Reef Horizon in the Sonju Lake Layered Mafic Intrusion by Thermal Migration Zone Refining...intrusions, including the Sonju Lake intrusion (Midcontinent rift, Minnesota). In traditional petrologic...all PGE derived from the upper portion of the intrusion (above the reef) partition into this layer resulting...observed distribution and mass balance in the Sonju Lake intrusion. The higher sulfide-silicate mineral partition...decade (Glazner et al., 2004). New ideas about intrusion formation have the potential to profoundly affect |  | | Journal (article/letter/editorial) | | River and South Kawishiwi intrusions of the Duluth Complex occurs in a variety of rock types, all produced...in the world. The parental magma for the Eagle intrusion was a high-FeO picrite. Isotopic and trace element...mineralization in the sheet-style intrusions of the Duluth Complex are related in part to sequestration of Ni by early...range of 1.3 to 2 × 106 km3 of mafic rocks in the Lake Superior region (Hutchinson et al., 1990; Cannon...disseminated sulfide occurrences of the Duluth Complex have been known for many years (e.g., Johnson, |  | | Journal (article/letter/editorial) | | PGE-enriched layers such as that found in the Sonju Lake intrusion (e.g., Miller, 1999; Park et al., 2004)...disseminated sulfide zones in the Jinbaoshan intrusion in China. Most, but perhaps not all, of the world’s...Merensky Reef in the Bushveld Complex and the JM Reef in the Stillwater Complex (e.g., Campbell et al., 1983;...PGE-rich occurrences in the Platreef of the Bushveld Complex, respectively. Changes in magma fO2 are related...et al., 2003b), sulfide deposits in the Duluth Complex (e.g., Ripley, 1981; Ripley and Al-Jassar, 036 |  | | 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 |  | | Journal (article/letter/editorial) | | high-Timpact melt sheet that produced the Sudbury Igneous Complex and associated Ni–Cu sulfide ores indicates that...Sciences, Indiana University, Bloomington, IN 47405, USA E-mail: cli@indiana.edu Tel.: +1-812-855-1196 Fax:...element (PGE)enriched layer in the Sonju Lake Intrusion of the Duluth Complex is thought to be due to the attainment...the composition of the parent magma of the Sonju Lake Intrusion the presented equation indicates that sulfide...reasonable parental composition for many Duluth Complex intrusions, can induce sulfide saturation at mixing |  | | Journal (article/letter/editorial) | | Old Main, 1 University Dr., Pembroke, NC 28372, USA; chaumba@uncp.edu Received: 24 May 2017; Accepted:...gabbronorites, a chromitite stringer, plagioclase websterite, plagioclase pyroxenite (pegmatitic in one narrow...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 |  | | Journal (article/letter/editorial) | | mineralization in sheet-like intrusions of the Duluth Complex RI are characterized by elevated bulk rock Cu/Ni...River and South Kawishiwi Intrusions of the Duluth Complex, as well as sulfide mineralization in geometrically...conduit-style deposits in MA the Eagle Intrusion and Tamarack Igneous Complex. These intrusions were emplaced...of the Duluth Complex range from -0.85 to 0.45 ‰ whereas values from the Eagle Intrusion and the Tamarack...Tamarack Igneous Complex range from 0.69 to 1.84 ‰. 65Cu values of the sedimentary rocks range from -0.33 |  | Vervoort, Jeff D., Wirth, Karl, Kennedy, Bryan, Sandland, Travis, Harpp, Karen S. (2007) The magmatic evolution of the Midcontinent rift: New geochronologic and geochemical evidence from felsic magmatism. Precambrian Research, 157 (1) 235-268 doi:10.1016/j.precamres.2007.02.019 | Journal (article/letter/editorial) | | Pullman, WA 99164, USA b Department of Geology, Macalester College, St. Paul, MN 55000, USA c Department of...Geology, Colgate University, Hamilton, NY 13346, USA Received 18 May 2006; received in revised form 26...the NE limb of the rift along the North Shore of Lake Superior where rhyolites comprise a large percentage...Keweenawan Midcontinent rift plateau volcanics, Minnesota: petrographic and field recognition. J. Volcanol...granophyric complexes of the MRS exposed in NE Minnesota. U–Pb zircon ages for the granophyres define two |  | | Journal (article/letter/editorial) | | commonly much more evolved or primitive than bulk intrusion compositions, (b) evolved chilled margins are...Vavukanskii sill, Russia, the Sonju Lake intrusion, USA and the Dovyren intrusion, Russia showing variations...MgO-content in the entire section through the intrusion. Note that the lower chilled margin can be compositionally...sill), more primitive (Sonju Lake intrusion) or more evolved (Dovyren intrusion) than the bulk of the...intrusions. Hereafter in figures and text: Pl — plagioclase, Ol — olivine, Opx — orthopyroxene, Pig — pigeonite |  | | Journal (article/letter/editorial) | | University of Illinois Urbana Champaign, Urbana, IL, USA b Center for Microanalysis of Materials, University...University of Illinois Urbana Champaign, Urbana, IL, USA Version of record first published: 19 Jul 2010. To...University of Illinois Urbana Champaign, Urbana, IL, USA; Center for Microanalysis of Materials, University...University of Illinois Urbana Champaign, Urbana, IL, USA Downloaded by [McGill University Library] at 17:41...compositional interface leads to normally zoned plagioclase having overly anorthitic cores. These observations |  | | Journal (article/letter/editorial) | | 611 North Pleasant St., Amherst, MA 01003-9297, USA Accepted 5 September 2005 Abstract When olivine...components until another phase, for example plagioclase, saturates the liquid. Such cotectic fractionation...course real systems with varying D behave in a more complex fashion. In binary loops, concentrations may start...different bulk compositions, are given for the plagioclase diagram in Figs. 6 and 7 of Morse (1997), which...another phase, say plagioclase. Now the crystal assemblage is bimodal, with plagioclase and olivine possibly |  | Bai, Zhong-Jie, Zhong, Hong, Zhu, Wei-Guang, Hu, Wen-Jun, Chen, Cai-Jie (2019) The genesis of the newly discovered giant Wuben magmatic Fe–Ti oxide deposit in the Emeishan Large Igneous Province: a product of the late-stage redistribution and sorting of crystal slurries. Mineralium Deposita, 54 (1) 31-46 doi:10.1007/s00126-018-0801-9 | Journal (article/letter/editorial) | | Fe–Ti oxide deposit hosted by the Wuben mafic intrusion has recently been discovered in the Pan–Xi area...Panzhihua intrusion or other ore-bearing intrusions in this area. The rocks from the Wuben intrusion and MZb...MZb of the Panzhihua intrusion contain compositionally similar silicate minerals and have similar ti...correct, then the shape and volume of the Panzhihua intrusion would be far larger than is currently thought...thought and the genetic model of this combined intrusion would also need to be reconsidered. Miner Deposita |  | | Journal (article/letter/editorial) | | 98–110. MINERALS AND MINERAL ASSEMBLAGES Plagioclase Composition in Rocks of PGE-Bearing Layered Series...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...gabbronorite, anorthosite, and norite. Cumulative plagioclase occurs throughout Vurechuaivench massif. According...in the middle part of the section, cumulative plagioclase is represented by labradorite and bytownite with |  | | Journal (article/letter/editorial) | | Urbana–Champaign, 1301 W. Green Street, Urbana, IL 61801, USA Géosciences Environnement Toulouse, CNRS – Université...Geology, Idaho State University, Twin Falls, ID, USA a r t i c l e i n f o Article history: Received...well-characterized magmatic suite from Cedar Butte volcano (ID, USA), as well as a sill with progressive compositional...compositional change within Finland granophyre (Duluth Complex, MN, USA). Both isotopic systems show a significant...Urbana–Champaign, 1301 W. Green Street, Urbana, IL 61801, USA. Tel.: +1 33786272984. E-mail address: zambardi@illinois |  | 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...or tremolite, (2) replacement of sulfides and plagioclase by epidote, (3) replacement of sulfides by calcite...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 |  | Bai, Zhong-Jie, Zhong, Hong, Li, Chusi, Zhu, Wei-Guang, Hu, Wen-Jun (2016) Association of cumulus apatite with compositionally unusual olivine and plagioclase in the Taihe Fe-Ti oxide ore-bearing layered mafic-ultramafic intrusion: Petrogenetic significance and implications for ore genesis. American Mineralogist, 101 (10) 2168-2175 doi:10.2138/am-2016-5577 | Journal (article/letter/editorial) | | olivine and plagioclase in the Taihe Fe-Ti oxide ore-bearing layered mafic-ultramafic intrusion: Petrogenetic...the top of the intrusions and the associated plagioclase and olivine, if present, have An content <50...example is the Taihe intrusion, which is described in this paper. In this intrusion the associated olivine...olivine and plagioclase are significantly more primitive, containing 69 mol% Fo and 59 mol% An, respectively...model include the observed upward decrease in plagioclase An contents coupled by lack of significant change |  | | 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) | | similarities with mineralization in the Stella Intrusion, Navigator is more like Rio Jacaré. 17 18 Jameson...similarities with the upper zone of the Bushveld Complex. 21 Abstract 22 Three mafic-hosted, magnetite-related...layered intrusions belonging to 24 the Giles Complex, Musgrave Province, Western Australia. The hosting...resemble reef-type 46 mineralization in the Stella Intrusion, South Africa, whereas Navigator mineralization...52 Cu/Pd and S/Se ratios indicate that this intrusion experienced an earlier sulfide saturation 53 |  | | Journal (article/letter/editorial) | | of the late Permian Panzhihua layered gabbroic intrusion, SW China Kwan-Nang Pang a,⁎, Chusi Li b, Mei-Fu...Indiana University, Bloomington, Indiana 47405, USA a r t i c l e i n f o Article history: Received...Keywords: Mineral composition Fe–Ti oxide ore Layered intrusion Panzhihua a b s t r a c t A systematic study...stratigraphic sections through the Panzhihua intrusion, a layered gabbroic sill of late Permian age that...Emeishan large igneous province, SW China. The intrusion, which is ∼ 19 km long and ∼ 2 km thick, is divided |
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