 | Taranovic, Valentina, Ripley, Edward M., Li, Chusi, Rossell, Dean (2015) Petrogenesis of the NiāCuāPGE sulfide-bearing Tamarack Intrusive Complex, Midcontinent Rift System, Minnesota. Lithos, 212. 16-31 doi:10.1016/j.lithos.2014.10.012 | Journal (article/letter/editorial) | | sulļ¬de-bearing Tamarack Intrusive Complex, Midcontinent Rift System, Minnesota Valentina Taranovic a,ā, Edward...Rio Tinto Exploration (Kennecott Exploration), Duluth, MN 55810, United States a r t i c l e i n f...Intrusive Complex Midcontinent Rift System a b s t r a c t The Tamarack Intrusive Complex (TIC, 1105...1105.6 Ā± 1.2 Ma) in NE Minnesota, was emplaced during the early stages of the development of the Midcontinent...Intrusion. Both intrusions comprise peridotite, feldspathic peridotite, feldspathic pyroxenite, melatroctolite |  | | Journal (article/letter/editorial) | | Rift-Related Echo Lake Intrusion in Northern Michigan, USA Alexander James Koerber and Joyashish Thakurta *...University, 1903 W Michigan Ave, Kalamazoo, MI 49008, USA; alexander.j.koerber@wmich.edu * Correspondence:...intrusion in the Upper Peninsula (UP) of Michigan, USA, was formed during the 1.1 Ga Midcontinent Rift event...in the intrusion, with interlayered bands of peridotite, mafic pegmatitic rock, olivine gabbro, magnetite-bearing...deposits, such as the Sonju Lake deposit in northern Minnesota. Keywords: Echo Lake; Midcontinent; palladium; |  | | Journal (article/letter/editorial) | | SerpentineāHisingerite Solid Solution in Altered Ferroan Peridotite and Olivine Gabbro Benjamin M. Tutolo 1, * ,...University of Washington, Seattle, WA 98195-1310, USA; bwevans@uw.edu (B.W.E.); kuehner@uw.edu (S.M.K.)...previously observed. In samples from the Duluth Complex (Minnesota, USA) containing igneous olivine Fa36ā44...ferroanāolivine-bearing samples from the Laramie Complex (Wyoming, USA) show a compositional variability of secondary...that the products of serpentinization of ferroan peridotite include phyllosilicate with iron contents proportionally |  | Taranovic, Valentina, Ripley, Edward M., Li, Chusi, Rossell, Dean (2016) Chalcophile element (Ni, Cu, PGE, and Au) variations in the Tamarack magmatic sulfide deposit in the Midcontinent Rift System: implications for dynamic ore-forming processes. Mineralium Deposita, 51 (7) 937-951 doi:10.1007/s00126-016-0643-2 | Journal (article/letter/editorial) | | sulfide deposit is hosted by the Tamarack Intrusive Complex (1105.6 Ā± 1.2 Ma) in the Midcontinent Rift System...The most important sulfide mineralization in the Complex occurs in the northern part, which consists of...intrusive units: an early funnel-shaped layered peridotite body containing relatively fine-grained olivine...Intrusion) at the top, and a late gabbro-troctolite-peridotite dike-like body containing relatively coarse-grained...Bloomington, IN 47405, USA 2 Rio Tinto Exploration (Kennecott Exploration), Duluth, MN 55810, USA platinum-group |  | | Journal (article/letter/editorial) | | mineralization in sheet-like intrusions of the Duluth Complex RI are characterized by elevated bulk rock...River and South Kawishiwi Intrusions of the Duluth Complex, as well as sulfide mineralization in geometrically... MA the Eagle Intrusion and Tamarack Igneous Complex. These intrusions were emplaced during early stages...sulfide mineralization in intrusions of the Duluth Complex range from -0.85 to 0.45 ā° whereas values from...from the Eagle Intrusion and the Tamarack Igneous Complex range from 0.69 to 1.84 ā°. ļ¤65Cu values of the |  | | Journal (article/letter/editorial) | | origin of CuāNi sulfide mineralization in the Duluth Complex, midcontinent rift system Edward M. Ripley...the Partridge River Intrusion of the 1.1 Ga Duluth Complex is restricted primarily to a 100 m thick zone...Sciences, Indiana University, Bloomington, IN 47405, USA e-mail: ripley@indiana.edu Present Address: N. I...the earliest stages in the development of the Duluth Complex at a time when volatile species such as S and...Ga Duluth Complex is composed of a series of mafic intrusions that extend from the city of Duluth, Minnesota |  | | Journal (article/letter/editorial) | | AND STRUCTURE OF THE DULUTH COMPLEX PAUL W. WEIBLEN and G. B. MOREY Minnesota Geological Survey, 1633...1633 Eustis Street, Saint Paul, Minnesota 55108 ABSTRACT. The Duluth Complex consists of an extensive cap...troctolitic rocks. Minor peridotite is exposed at the base of the complex near Duluth. Felsic rocks occur...petrologic data suggests that the anorthositic rocks, peridotite, and the bulk of the felsic rocks may be related...principal control on the mode of emplacement of the Duluth Complex. Evolution of half-graben structures also provides |  | Taranovic, V., Ripley, E. M., Li, C., Shirey, S. B. (2018) S, O, and Re-Os Isotope Studies of the Tamarack Igneous Complex: Melt-Rock Interaction During the Early Stage of Midcontinent Rift Development. Economic Geology, 113 (5) 1161-1179 doi:10.5382/econgeo.2018.4585 | Journal (article/letter/editorial) | | Re-Os Isotope Studies of the Tamarack Igneous Complex: Melt-Rock Interaction During the Early Stage of...Abstract The Tamarack Intrusive Complex (1105 Ā± 1.2 Ma), in northeastern Minnesota, occurs within the Midcontinent...types of mineralization in the Tamarack Intrusive Complex are characterized by Ī“34S values between ā0.2 and...disseminated sulfides in intrusions of the Duluth Complex and Crystal Lake Gabbro, which may be as elevated...Initial 187Os/188Os ratios in the Tamarack Intrusive Complex are between 4 and 44% higher than the same ratio |  | Czamanske, Gerald K., Bennett, Pauline C., Zientek, Michael L., Weiblen, Paul W., Havach, George A., Foose, Michael P. (1986) Comprehensive bibliographies on mineralized and unmineralized layer mafic intrusions in the United States. Open-File Report Vol. 1986 (86-589) US Geological Survey doi:10.3133/ofr86589a | Report (issue) | | California. Department of Geology, University of Minnesota, Minneapolis *U.S. Geological Survey, Res ton...Weiblen, Department of Geology, University of Minnesota These bibliographies have been compiled at the...or mine ultramafic or ultrabasic or dunite or peridotite or harzburgite gabbro or anorthosite or norite...prospector with potential. The Duluth Complex, Minnesota, and the Stillwater Complex, Montana, are given separate...the United States. The bibliography on the Duluth Complex and related Keweenawan intrusions includes |  | | Journal (article/letter/editorial) | | Cu-Ni Sulfidcs in the Water Hen Intrusion,Duluth Complex,Minnesota P. R. MAINWARINGANDA. J. NALDRETT Abstract...into the basal portion of the Duluth Complex, near Hoyt Lakes, Minnesota. Cyclical units of mineral-gradedlayers...xenolithsand associated con- RECENTstudiesin the Duluth Complexof northeasttaminated mafic rocks in the...Kawishiā¢vi,and PartridgeRiver intrusionsare either the complex. Another differencebetweenthe Wa- smallandfunnel-shaped...to have intruded the southernhalf of the Duluth Complex. The body consistsof mineral-gradedrocks varying |  | | Journal (article/letter/editorial) | | China occurs within a 6 kmlong dyke-like body of peridotite. The compositions of olivine within the dyke...in the Duluth complex occurs in troctolitic intrusions along the western margin of the complex as a result...the value of the mineralisation is far greater. Duluth represents a major Ni resource, but the low grade...(1990); those for Noril'sk are an estimate only; for Duluth are from Listerud and Meineke (1977); for Jinchuan...the 1.334 Ga (Amelin et al. 1997) Voisey's Bay complex. This is a member of the Nain Plutonic Suite (1 |  | | Journal (article/letter/editorial) | | Copyright 0 1996Elsevier Science Ltd Printed in the USA. All rights reserved 0016.7037196$15.00 + .OO PI1...from the Partridge River intrusion, Duluth Complex, Minnesota, USA CHRISTOPHERI. CHALOKWU, ā* ALEXH A...Department, Auburn University, Auburn, Alabama 36849, USA 2Vemadsky Institute of Geochemistry and Analytical...Partridge River intrusion of the Keweenawan Duluth Complex is the approximately fivefold to ninefold increase...low-alumina, high Ti-P basalts associated with the Duluth Complex but is different from the leading edge ferrodioritic |  | | Report (issue) | | 17.89 25.75 [100.0] 100.00 (1) Hibbing, Minnesota, USA; by electron microprobe, average of eight analyses...In serpentinized troctolite and peridotite (Hibbing, Minnesota, USA); in fractures in chlorine-rich portions...serpentine, olivine, plagioclase, biotite (Hibbing, Minnesota, USA); chalcopyrite, pentlandite (Sudbury, Canada)...From drill cores in the Duluth complex, near Hibbing, St. Louis Co., Minnesota, USA. In the Strathcona mine...western Siberia, Russia. Name: For Hibbing, Minnesota, USA, from near where the mineral was first characterized |  | Ding, Xin, Ripley, Edward M., Shirey, Steven B., Li, Chusi (2012) Os, Nd, O and S isotope constraints on country rock contamination in the conduit-related Eagle CuāNiā(PGE) deposit, Midcontinent Rift System, Upper Michigan. Geochimica et Cosmochimica Acta, 89. 10-30 doi:10.1016/j.gca.2012.04.029 | Journal (article/letter/editorial) | | 1001 East Tenth Street, Bloomington, IN 47405, USA Carnegie Institution of Washington, Department of...5241 Broad Branch Road, NW, Washington, DC 20015, USA Received 19 December 2011; accepted in revised form...determined. Three major rock types, feldspathic peridotite, melatroctolite and olivine melagabbro, are recognized...dike-like bodies within the intrusion. Feldspathic peridotite, the most olivine-rich unit in the intrusion...visible igneous layering or foliation. Feldspathic peridotite contains 30ā60% olivine, 5ā15% clinopyroxene |  | | Journal (article/letter/editorial) | | 1001 East Tenth Street, Bloomington, IN 47405, USA e-mail: ripley@indiana.edu those of the disseminated...zones of large layered mafic intrusions such as the Duluth and Mellen complexes (Klewin 1990; Seifert et al...Eagle deposit is variable and indicates that more complex processes operated from the early stages of sulfide...mineralization in the sheet-like intrusions of the Duluth Complex to better understand the role of magma composition...recognized in the Eagle intrusion: feldspathic peridotite, melatroctolite, and olivine melagabbro (Fig |  | | Journal (article/letter/editorial) | | troctolitic rocks of the Bathtub intrusion, Duluth Complex, U.S.A Sara RaiÄ, Kurt Krenn, Aberra Mogessie...troctolitic rocks of the Bathtub intrusion, Duluth Complex, U.S.A, Precambrian Research (2019), doi: https://...troctolitic rocks of the Bathtub intrusion, Duluth Complex, U.S.A. Sara RaiÄa, Kurt Krennb & Aberra Mogessiec...deposit in the troctolitic Bathtub intrusion (Duluth Complex) contains abundant CH4-rich fluid inclusions...active rifting environment in which magma of the Duluth Complex (1.1 Ga) has intruded as repeated pulses, fluid |  | | Journal (article/letter/editorial) | | Geochemistry of Layered Sills in the Deer Lake Complex, Minnesota E.M. Ripley Depa~ment of Geology, Indiana...Bloomington, Indiana, USA The Deer Lake Complex, located in north-central Minnesota, consists of a series...series of layered peridotite-pyroxenite-gabbro sills. Sulfide minerals occur as fine disseminations throughout...gabbro units, and occur more sporadically in peridotite and basal chilled margin units. Sulfide volume...pentlandite is the dominant sulfide mineral in peridotite (pd) units, with Ni-enrichment most likely linked |  | | Report (issue) | | GEOLOGY OF THE DULUTH GABBRO COMPLEX NEAR DULUTH, MINNESOTA UNIVERSITY OF MINNESOTA MINNESOTA GEOLOGICAL...BULLETIN 44 Geology of the Duluth Gabbro Con1plex near Duluth, Minnesota BY RICHARD B. TAYLOR THE...THE MINNEAPOLISĀ· 1964 UNIVERSITY OF MINNESOTA PRESS PRINTED IN THE UNITED STATES OF AMERICA AT THE LUND...Group ............................... 6 Duluth Gabbro Complex .................................. 6 Pleistocene..................................... 7 DULUTH GABBRO COMPLEX . . . . . . . . . . . . . . . . . . . . |  | | Journal (article/letter/editorial) | | Copyright Ā© 2001 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/01 $20.00 ā«¹ .00 Pergamon...variations in carbonaceous pelites hosting the Duluth Complex: Implications for metamorphic and metasomatic...Sciences, Indiana University, Bloomington IN 47405, USA Department of Earth Sciences, PO Box 28E, Monash...studies of sulfide mineralization in the 1.1 Ga Duluth Complex have suggested that sulfur, and possibly metals...the Virginia Formation (country rock to the Duluth Complex), ranging from unmetamorphosed through strongly |  | | Journal (article/letter/editorial) | | that the compositions of the host rocks in the Duluth Complex vary widely in proximity to country-rock inclusions...al. (1999a) noted that the xenoliths in the Duluth Complex had undergone partial melting, but that no...systems Natural systems are considerably more complex than any of these mathematical models. The analyzed...Pb ā S (Hanski 1992, Walker et al. 1997), and at Duluth it seems to be C > S > Nd > Pb ā Os (Ripley et...the contact aureole of the Duluth Complex, Dunka Road CuāNi deposit, Minnesota. Can. Mineral. 27, 293-310 |  | | Report (issue) | | MINNESOTA GEOLOGICAL SURVEY PRISCILLA C. GREW, DIRECTOR BULLETIN 47 BIBLIOGRAPHY OF MINNESOTA GEOLOGY...UNIVERSITY OF MINNESOTA ST. PAULĀ· 1987 ISSN 0076-9169Ā· ISBN 0-934938-02-04 The University of Minnesota is committed...references to the geologic literature on the State of Minnesota issued from 1981 through 1985, as well as omissions...omissions from the previous two bibliographies of Minnesota geology: Bulletin 34 (published in 1951), with...sources; usage in the index reflects current Minnesota Geological Survey style. The last bibliography |  | Benson, E.K., Ripley, E.M., Li, C., Underwood, B.W., Mahin, R. (2020) Multiple S Isotopes and S Isotope Heterogeneity at the East Eagle Ni-Cu-Platinum Group Element Deposit, Northern Michigan. Economic Geology, 115 (3). 527-541 doi:10.5382/econgeo.4707 | Journal (article/letter/editorial) | | 47405, USA 2Eagle Mine, Lundin Mining, 4547 County Road 601, Champion, Michigan 49814, USA Abstract...been shown in plutonic magmatic systems (e.g., Duluth Complex; Ripley et al., 2007), it can commonly be correlated... Duke University, Durham, North Carolina 27708, USA. ISSN 0361-0128; doi:10.5382/econgeo.4707; 16 p....1107 Duluth Complex 1099 Volcanic rocks CC 1108 LS 1109 Crystal Lake Tamarack Igneous Complex N R...1109 Ontario CCD Sibley Group Lake Nipigon Minnesota Oronto Group MBD Wisconsin 0 50 100 MPF |  | | Journal (article/letter/editorial) | | contact zone of the Duluth Complex and the Biwabik Iron Formation, northeastern Minnesota Edward M. Ripley...Resources Research Institute, University of Minnesota Duluth, Duluth, MN 55811-1442, United States Received...the South Kawishiwi Intrusion (SKI) of the Duluth Complex and country rocks of the Biwabik Iron Formation...Elsevier B.V. All rights reserved. Keywords: Duluth Complex; Biwabik Iron formation; ReāOs isotopes; OāH...intrusions that comprise the ~ 1.1 Ga Duluth Complex of Minnesota are in contact with Proterozoic metasedimentary |  | | Journal (article/letter/editorial) | | River and South Kawishiwi intrusions of the Duluth Complex occurs in a variety of rock types, all produced...mineralization in the sheet-style intrusions of the Duluth Complex are related in part to sequestration of Ni...The disseminated sulfide occurrences of the Duluth Complex have been known for many years (e.g., Johnson...Ni-Cu-PGE mineralization found in the Duluth Complex of Minnesota and the Eagle deposit of Michigan (Fig...of the Marathon deposit found in the Coldwell Complex is described by Good and Crockett (1994). Bakheit |  | 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) | | Cu-PGE-S Redistribution in the Sonju Lake Intrusion, Minnesota YOUNG-ROK PARK,* EDWARD M. RIPLEY,ā Indiana University...MILLER, JR., Minnesota Geological Survey, 2646 University Avenue West, St. Paul, Minnesota 55114-1057 ...the 1.1 Ga Midcontinent rift-related Beaver Bay Complex, is a 1,200-mthick, strongly differentiated, layered...sequence of mafic cumulates located in northeastern Minnesota. Basal melatroctolite and dunite layers are overlain...as the Bushveld (Merensky reef) and Stillwater Complex (J-M reef) mostly occur near the transition between |
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