👁 Image
| | Journal (article/letter/editorial) | | Ferroaugite Syenite from the
Coldwell Alkaline Complex, Ontario, Canada
6>-ROGER H. MITCHELL and R. GARTH...Department of Geology, Lakehead University, Thunder Bay, Ontario, Canada P7B 5E1
(Received 7 July 1977; in revisedform...ferroactinolite, alkali feldspar, aenigmatite, quartz
and zircon. Extreme differentiation of ferroaugite syenite...E R A L GEOLOGY OF THE COLDWELL
COMPLEX
Tectonic setting
The Coldwell complex located on the north shore...studied alkaline intrusions in North America. The complex is
unusual in that it contains oversaturated, saturated | 👁 Image
| | Journal (article/letter/editorial) | | deadhorse creek volcaniclastic breccia complex,
northwestern Ontario, Canada
Received: 10 January 2005 / Accepted:...Proterozoic Deadhorse Creek volcaniclastic breccia complex was emplaced in Archean
metasedimentary and metavolcanic...adjacent to the Proterozoic Coldwell alkaline complex. The western
sub-complex of the Deadhorse Creek breccia...uraninite; vanadian crichtonite;
xenotime-(Y); zircon and hydrated zircon; and zirconthorite-coffinite solid solutions...of dolomite-ankerite and calcite with accessory
zircon, xenotime, and monazite. Barite, baotite and Barich | 👁 Image
| | Journal (article/letter/editorial) | | of Nepheline Syenites from
the Coldwell Alkaline Complex, Ontario, Canada
by ROGER H. MITCHELL AND R....Department of Geology, Lakehead University, Thunder Bay, Ontario, Canada P7B 5E1
WITH SEVEN PLATES
ABSTRACT...natrolite syenites of Center 2 of the Coldwell alkaline complex exhibit rare wispy
mafic-rich modal layering...alkali basaltic magmas.
INTRODUCTION
The Coldwell complex is located on the north shore of Lake Superior...Superior and is the largest
alkaline complex in North America. Mitchell & Platt (1977, 1978) have summarized | 👁 Image
| | Journal (article/letter/editorial) | | from the Deadhorse Creek diatreme complex, northwestern Ontario, Canada R. GARTHPLATTANDROGERH. MITCHELL...Department of Geology, Lakehead University, Thunder Bay, Ontario, Canada P7B 5El Abstract The main mineralized...subcomplex of the Deadhorse Creek diatreme complex, northwestern Ontario possesses an exotic mineralogy. Mineralization...U), Be, Ba and Sr. Minerals include phenacite, zircon, uraninite, thorite, monazite-(Ce), xenotime-(Y)...the spatially related Coldwell alkaline complex and/or the Prairie Lake complex are both potential sources | 👁 Image
| | Journal (article/letter/editorial) | | magmatism,
North America: evidence from the Coldwell Complex
L . M . H e a m a n and N. M a c h a d o *...Department of Geology, Royal Ontario Museum, 100 Queen's Park, Toronto, Ontario, Canada M5S 2C6
Received January...Accepted September 26, 1991
Abstract. The Coldwell Complex represents the largest
alkaline intrusion...Midcontinent Rift
System in North America. This complex contains a
plethora of rock types that have previously...detailed U-Pb zircon/baddeleyite age study of five samples indicates that
the majority of the complex was emplaced | 👁 Image
| Hollings, Pete, Smyk, Mark, Heaman, Larry M., Halls, Henry (2010) The geochemistry, geochronology and paleomagnetism of dikes and sills associated with the Mesoproterozoic Midcontinent Rift near Thunder Bay, Ontario, Canada. Precambrian Research, 183 (3) 553-571 doi:10.1016/j.precamres.2010.01.012 | Journal (article/letter/editorial) | | Mesoproterozoic Midcontinent Rift near Thunder Bay,
Ontario, Canada
Pete Hollings a,∗ , Mark Smyk b , Larry...Road, Thunder Bay, ON P7B 5E1, Canada
Ontario Geological Survey, 435 James St. South, Thunder Bay, ON P7E...P7E 6S7, Canada
c
Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G...T6G 2E3, Canada
d
Department of Chemical and Physical Sciences, University of Toronto Mississauga, Mississauga...Mississauga, ON L5L 1C6, Canada
b
a r t i c l e
i n f o
Article history:
Received 23 April 2009
Received | 👁 Image
| WU, FU-YUAN, MITCHELL, ROGER H., LI, QIU-LI, ZHANG, CHANG, YANG, YUE-HENG (2017) Emplacement age and isotopic composition of the Prairie Lake carbonatite complex, Northwestern Ontario, Canada. Geological Magazine, 154 (2) 217-236 doi:10.1017/s0016756815001120 | Journal (article/letter/editorial) | | of the Prairie Lake
carbonatite complex, Northwestern Ontario, Canada
F U - Y UA N W U ∗ †, R O G E R...‡Department of Geology, Lakehead University, Ontario, P7B 5E1, Canada
(Received 3 September 2015; accepted...carbonatite complexes, including the Prairie Lake complex (NW
Ontario), are widely distributed in the Canadian...are related to a mantle plume. The Prairie Lake complex is composed of carbonatite, ijolite
and potassic...ages indicate that the various rocks within the complex
were synchronously emplaced at about 1160 Ma. The | 👁 Image
| | Journal (article/letter/editorial) | | include Cu-Ni-PGE and Ti-Fe (V) in the Duluth
Complex, U-REE-Nb in small carbonatites, and breccia pipes...area, and Cu-Ni sulfide deposits in the Duluth
Complex.
Models for the tectonic evolution of the MRS
have...Cannon et al.,
1989), and new high-precision U - P b zircon
ages that constrain the temporal evolution of
rift...0
I
50
I
kdometers
1
100
!
~Y~
Au
)ColdweH
Complex
Au
"3
Au
"--~.
J~
~z">-. - .04
/2"~.
~,...group sedimentary rocks
Middle Prolerozoic alkalic complex
Middle Proterozoic elastic sedimentary rocks
Ygd | 👁 Image
| | Journal (article/letter/editorial) | | Hemlo-Heron Bay greenstone belt and Hemlo
AU-MO deposit, Superior Province, Ontario, Canada
1. Sequence...determined
geochronology
by zircon U-Pb
F. CORFU and T.L. MUIR
Ontario Geological Survey, cjo Department...Geology, Royal Ontario Museum, Toronto,
Ontario Geological Stiruey, Toronto, Ont. M7A 1 W4 (Canada)
Ont. M5S...M5S 2C6 (Canada)
(Received December 5,1988; revised and accepted May 3,1989)
Abstract
Corfu, F. and...Hemlo-Heron
Bay greenstone belt and Hemlo AU-MO deposit, Superior Province,
Ontario, Canada, 1. Sequence | 👁 Image
| | Journal (article/letter/editorial) | | Davidson
Geological Survey of Canada, 601 Booth Street, Ottawa, Ontario, Canada K1A 0E8
Received 27 December...displaced eastward over this crust. South of the Canada–USA border, the
western limit of North American...Aston Formation; 6, Ellice and Parry Bay formations; 7, Hornby Bay Group; 8, Wernecke Supergroup; 9, Muskwa... Gardar; 24, Midcontinent rift; 24a, Port Coldwell
complex; 25, Shaler Supergroup; 26, Mackenzie Mountains...occur
in Rae and Hearne provinces west of Hudson Bay and comprise
rift-related clastic sedimentary deposits | 👁 Image
| Drenth, Benjamin J., Souders, A. Kate, Schulz, Klaus J., Feinberg, Joshua M., Anderson, Raymond R., Chandler, Val.W., Cannon, William F., Clark, Ryan J. (2020) Evidence for a concealed Midcontinent Rift-related northeast Iowa intrusive complex. Precambrian Research, 347. 105845pp. doi:10.1016/j.precamres.2020.105845 | Journal (article/letter/editorial) | | Midcontinent Rift-related northeast Iowa intrusive
complex
Benjamin J. Drenth, A. Kate Souders, Klaus J. Schulz...Midcontinent Rift-related northeast Iowa intrusive
complex, Precambrian Research (2020), doi: https://doi...Midcontinent Rift-related northeast Iowa intrusive
complex
3
4
5
Benjamin J. Drentha, A. Kate Soudersb,...
intrusive complex concealed under Paleozoic cover, the northeast Iowa intrusive complex
22
(NEIIC)...in geophysical data indicate that the intrusive complex
25
26
cuts the dike swarm, meaning the maximum | 👁 Image
| | Journal (article/letter/editorial) | | PROSPECT
IN THE FLIN FLON GREENSTONE BELT, MANITOBA, CANADA
GEMA RIBEIRO OLIVO§
Department of Geological Sciences...Engineering, Queen’s University, Kingston, Ontario K7L 3N6, Canada
PETER THEYER§
Manitoba Geological Survey...Avenue,
Suite 360, Winnipeg, Manitoba R3P 3P2, Canada
ABSTRACT
The McBratney high-grade PGE–Au occurrence...Paleoproterozoic volcanic-rock-hosted massive
sulfide (VMS) district in the world, with production and
reserves exceeding...aggregates of pyrrhotite–pentlandite and locally forms
complex composite grains with temagamite (Figs. 4G,
5) | 👁 Image
| | Journal (article/letter/editorial) | | belt,
Superior Province, Canada
G.P. Beakhouse a,∗ , D.W. Davis b,1
a Ontario Geological Survey, 933 Ramsey...Sudbury, Ont., Canada P3E 6B5
b Royal Ontario Museum, 100 Queens Park Road, Toronto, Ont., Canada M5S 2C6
...The earliest of these plutons contain abundant zircon
inheritance indicating crustal interaction whereas...whereas the latest plutons show no significant zircon inheritance.
This secular evolutionary change in the...University of Toronto, 22 Russell Street, Toronto, Ont., Canada M5S 3B1.
Tel.: +1 416 945 0355; fax: +1 416 978 | 👁 Image
| | Journal (article/letter/editorial) | | Department o/Geology, Lakehead Ulllverslty, Thunder Bay, Ont P7B 5£1 (Canada)
(Received December 19, 1989; accepted...composition of amphiboles may occur in a given complex. A
subtrend found only In oversaturated complexes...variation of amphiboles from the Topsalls-St. Lawrence complex (Strong and Taylor, 1984) illustrated III
(a) the...MITCHELL
(A)
RALLIER - DU - BATY
(8)
FLOWERS BAY
Fig. 2. Compositional variation of amphiboles from...Ralher-du Batty (Glret et al., 1980) and (b) Flowers Bay complexes
(Collerson. 1982).
beekite solid solutions | 👁 Image
| | Journal (article/letter/editorial) | | system recorded by trace elements in quartz:
Krupka district, eastern Krušné hory/Erzgebirge—Tereza Peterková...sulfide
mineralization in the Coldwell Complex, Midcontinent Rift,
Canada—David J. Good and Peter C. Lightfoot...formation of
early gabbros at the Coldwell Complex, Ontario, Canada—
Yong-hua Cao, David J. Good, Robert...the High Arctic large
igneous province, Nunavut, Canada—Derek H.C. Wilton,
Benoit M. Saumur, Adrian Gordon...the Cu-Au geochemical prospects in the Feizabad
district, NW Iran—Reza Ghezelbash, Abbas Maghsoudi,
Mehrdad | 👁 Image
| | Journal (article/letter/editorial) | | 1050-1069
The Geordie Lake Intrusion, Coldwell Complex, Ontario:
A Palladium-
and Tellurium-Rich
Disseminated...Departmentof Geology,LakeheadUniversity,ThunderBay, Ontario, CanadaP7B 5E1
Abstract
The GeordieLakeintrusionis...only recognizedsubsequentto the
elsewherein the complex
The GeordieLakegabbrosandtroctolitesforma small...thispaperis to describethe natureof the basichost
The Coldwell alkaline complexintrudesArchcan
rocks,identify...University, 3450 University Street, Montreal, Quebec, Canada of magmatism,
H2A
2A7.
0361-0128/91/1254/1050-2053 | 👁 Image
| | Journal (article/letter/editorial) | | Department of Geology, Lakehead University, Thunder Bay, Ontario, Canada
ABSTRACT. The mineralogy, including...pyroxene trend associated with each individual
complex is a function of the evolution attained by the...(1965) on Chinduzi, indicate that each body has a
complex pattern of intrusions which often take
A. R....varieties. Alkali feldspar shows a wide range of complex exsolution and
replacement textures. Nepheline... Accessory
phases include apatite, sphene, and zircon. Rosenbuschite, lgtvenite, catapleiite, and sphalerite | 👁 Image
| | Journal (article/letter/editorial) | | intrusion, eastern gabbro,
Coldwell alkaline complex, Northwestern Ontario, Canada:
evidence for multiple...Earth Sciences, Universiry of Western Ontario, London, Ont., Canada N6A 587
Received 9 January
1996; revised...1997: accepted 3 June 1997
Abstract
The Coldwell alkaline complex is a large (> 350 km’) gabbro and syenite...a partial ring dyke on the outer margin of the complex and consists of at least
three discrete intrusions...1997 Elsevier Science B.V.
Keywords: Coldwell alkaline complex; Ontario; Ring-dyke; Gabbro
1. Introduction | 👁 Image
| | Journal (article/letter/editorial) | | Mulanje complex, Malawi
R. GARTH PLATY
Department of Geology, Lakehead University, Thunder Bay, Ontario...Ontario, Canada
AND
ALAN R. WOOLLEY
Department of Mineralogy, British Museum (Natural History), London, England...distinct
complexes the Main complex and the Chambe complex.
Each complex is associated with its own trend...trend ofpyroxene
evolution. The Main complex pyroxenes exhibit initial
enrichment in hedenbergite before...to those of the Main
complex.
The general evolutionary trend of the Main complex
amphiboles is katophorite | 👁 Image
| | Journal (article/letter/editorial) | | rocks of
the Il’menskie Gory (Ilmeny Mountains) Complex and
its framework in the southern Urals.
Despite...Ba-biotites from gabbro of the
Il’menskie Gory Complex were calculated using the
data presented in Table...n
Urals
Vanadium
muscovite
Vanadium biotite
Canada
Urals
Spain
Urals
1
2
3
4
5
6
7
35.20...Lake Greater Ishkul, Ilmeny reserve, Chelyabinsk district: (1) sample
IK-194-5, moderately Ba-rich biotite...4) micas from subalkaline gabbro, Coldwell Complex, Ontario,
Canada [10]: (3) moderately Ba-rich biotite | 👁 Image
| | Journal (article/letter/editorial) | | been
reported in the cumulate sequence of the complex.
Elsewhere on Unst PGE mineralization more typical...red-bed basins and underlying reduced strata.
Complex Au–Pt–Pd grains and discrete PGM are widespread...stream draining the
northern part of the Lizard Complex in Cornwall. Modern
accounts of PGE in Britain... lenticular sulphide bodies in a
structurally complex contact zone. The sulphide zone, up to
20 m thick...to define drilling targets in the past.75 The
complex, tectonized nature of the eastern part of the Knock | 👁 Image
| | Journal (article/letter/editorial) | | Province, Canada: A U-Pb Geochronological Study
DONALD W. DAVIS†
Earth Sciences Dept., Royal Ontario Museum...Museum, 100 Queen’s Park, Toronto, ON, Canada M5S 2C6
AND SHOUFA LIN
Department of Earth Sciences, University...University of Waterloo, Waterloo, ON, Canada N2L 3G1
Abstract
The Hemlo deposit is one of Canada’s largest...events and their relationship to mineralization. Zircon populations
are commonly affected by both inheritance...information can only be determined by precise single zircon dating on rocks from a well constrained, structural | 👁 Image
| | Journal (article/letter/editorial) | | large muscovite flakes. These muscovites show complex zoning in a manner that compares with that seen...and muscovite with accessory tourmaline, apatite, zircon and rare topaz (Brindley, 1954; BrOck, 1974; BrOck...zones restore the euhedral mica shape (Fig. 1j). Zircon inclusions, often aligned parallel to zone boundaries...Concentric zones in muscovite. The haloes surround small zircon inclusions (magnification x10). (b) Zoned muscovite...Lithium-Aluminium Mica Crystals from the Pala Pegmatite District. Am. Mineral. 59, 1242-8. BrOck, P. M. (1974) | 👁 Image
| | Journal (article/letter/editorial) | | Edmonton,
Alberta, Canada T6G 2E3
b
Geological Survey of Canada, Ottawa, Canada K1A 0E8
Received 21...kimberlites
in the Lake Superior and James Bay Lowlands region of Ontario to Eocene kimberlites in the Lac de...Mesoproterozoic kimberlite province in central Ontario, (2) an Eocambrian/Cambrian Labrador Sea Province...location of several kimberlite fields and clusters in Ontario and Québec lie along a continental
extension of...more than 4000 km from Somerset
Island in northern Canada through the Fort à la Corne field in Saskatchewan | 👁 Image
| | Journal (article/letter/editorial) | | Royal Ontario Museum, I00 Queen's Park, Toronto, Ont. MSS 2C6, Canada
bGeological Survey of Canada, 601...601 Booth St., Ottawa, Ont. K1A OE8, Canada
(Received July 13, 1992; revised and accepted January 4, 1993...mafic magmas together
with apatite, ilmenite, + zircon, + zirconolite. In terrestrial mafic rocks these...dissociation
product of zircon during meteorite impact and as rims on mantle zircon megacrysts recovered...r / H f ( > 50). The
baddeleyite rims on mantle zircon xenocrysts have a unique chemical composition with |
|
