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Transition metal rutiles and titanates from the Deadhorse Creek diatreme complex, northwestern Ontario, Canada

Published online by Cambridge University Press:  05 July 2018

R. Garth Platt  and
Roger H. Mitchell
R. Garth Platt
Affiliation:
Department of Geology, Lakehead University, Thunder Bay, Ontario, Canada P7B 5El
Roger H. Mitchell
Affiliation:
Department of Geology, Lakehead University, Thunder Bay, Ontario, Canada P7B 5El
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Abstract

The main mineralized zone of the West subcomplex of the Deadhorse Creek diatreme complex, northwestern Ontario possesses an exotic mineralogy. Mineralization involves the first-order transition metals (principally Sc, Ti, V, Cr, Mn, and Fe), the second-order transition metals (principally Zr and Nb), the lanthanides, the actinides (principally Th and U), Be, Ba and Sr. Minerals include phenacite, zircon, uraninite, thorite, monazite-(Ce), xenotime-(Y), barylite, thortveitiite, hollandite, tyuyamunite, a number of unknown and as yet undescribed species, and those minerals more specifically described in this paper. These are Cr-V-Nb rutile, V-rich members of the crichtonite series, and a titanate of general composition (Cr,V3+,Fe3+)2(Ti,V4+,Nb)O5.

Similar to rutiles reported from alkaline rocks in general, the Deadhorse Creek rutiles are enriched in Cr and Nb, with the latter element attaining some of the highest recorded values. V contents are also unusually high and this element is thought to exist in both the tri- and tetravalent states.

The V-rich crichtonites are essentially vanadium analogues of crichtonite and lindsleyite. M-site Nb and V are the highest yet recorded. A-site cations are dominated by Ba and Sr with an inverse relationship together with lesser but significant amounts of Ca and Pb. Although not of upper mantle origin, they plot in the upper mantle LIMA quadrant of TiO2vs. FeO + Fe2O3 + MgO (Haggerty, 1991).

(Cr,V3+,Fe3+)2(Ti,V4+,Nb)O5 is thought to be a member of an homologous series of type (Cr,V3+,Fe3+)2p(Ti,V4+,Nb)2p+qO5p+4q with p = 1 and q = 0 and a V3O5-type structure. Whether this structure is ultimately derived from that of rutile or from α-PbO2 by crystallographic shear is not known.

The rutiles and titanates discussed here are thought to have formed from hydrous alkaline solutions which have scavenged the necessary elements from a mafic/ultramafic source. The origin of the solutions is not specifically known although the magmatic activity associated with the spatially related Coldwell alkaline complex and/or the Prairie Lake complex are both potential sources. Both complexes contain the necessary mafic/ultramafic rocks.

Keywords

rutiletitanatesdiatremeOntario, Canada
Type
Mineralogy
Information
Mineralogical Magazine , Volume 60 , Issue 400 , June 1996 , pp. 403 - 413
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1996

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References

Asbrink, S., Friberg, S., Magneli, A. and Andersson, G. (1959) Notes on the crystal structure of trivanadium pentoxide. Acta Chemica Scandenavica, 13, 603.CrossRefGoogle Scholar
Bowles, J.F.W., (1988) Definition and range of naturally occurring minerals with the pseudobrookite structure. Amer. Mineral., 73, 1377–83.Google Scholar
Grey, I.E. and Mumme, W.G. (1972) The structure of CrFeTi207. J. Solid State Chem.7, 5, 168–73.CrossRefGoogle Scholar
Grey, I.E. and Reid, A.F. (1972) Shear structure compounds (Cr,Fe)2Tin_2O2n-i derrived from a- Pb02 structural type. J. Solid State Chem., 5, 18–94.CrossRefGoogle Scholar
Grey, I.E., Reid, A.F. and Allpress, J.G. (1973) Compounds in the system Cr2O3-Fe2O3-TiO2_ ZrO2 based on intergrowths of the a-PbO2 and V305 structural types. J. Solid State Chem., 7, 86–98.CrossRefGoogle Scholar
Haggerty, S.E., Smyth, J.R., Erlank, A.J., Rickard, R.S. and Danchin, R.V. (1983) Lindsleyite (Ba) and mathiasite (K): two new chromium-titanates in the crichtonite series from the upper mantle. Amer. Mineral., 68, 494–505.Google Scholar
Haggerty, S.B. (1991) Oxide mineralogy of the upper mantle. In Oxide Minerals: petrologic and magnetic significance. Reviews in Mineralogy, 25, Mineral. Soc. Amer., 355—416.Google Scholar
Kwestroo, W. and Roos, A. (1960) Compounds in the system TiO2-Cr2O3-Fe2O3. J. Inorg. and Nucl. Chem., 13, 325–6.CrossRefGoogle Scholar
McLaughlin, R.M. (1990) Accessory rare metal mineralization in the Coldwell complex, northwest Ontario. Unpublished M.Sc. thesis, Lakehead University, Ontario, Canada, 167pp.Google Scholar
McLaughlin, R.M. and Mitchell, R.H. (1989) Rare metal mineralization in the Coldwell alkaline complex, northwestern Ontario. Geol. Can.- Min. A55. Can. Annual Meeting, program with Abstracts, 14: Al.Google Scholar
Mitchell, R.H. and Platt, R.G. (1977) Field guide to aspects of the geology of the Coldwell alkaline complex.Institute on Lake Superior Geology, 23rd. Annual Meeting, Thunder Bay. Guide Book, 35 pp.Google Scholar
Mitchell, R.H. and Platt, R.G. (1978) Mafic mineFalogy of ferroaugite syenites from the Coldwell alkaline complex, Ontario, Canada. J. Pet.y, 19, 627–51.CrossRefGoogle Scholar
Mitchell, R.H. and Platt, R.G. (1982) Mineralogy and petrology of nepheline syenites from the Coldwell alkaline complex, Ontario, Canada. J. Pet., 23, 186–214.CrossRefGoogle Scholar
Mitchell, R.H., Platt, R.G. and Cheadle, S.P., (1983) A gravity study of the Coldwell complex, northwestern Ontario and its petrological significance. Can. J. Earth Sci., 20, 1631–8.CrossRefGoogle Scholar
Mitchell, R.H., Platt, R.G., Lukosius-Sanders, J., Artist- Downey, M. and Moogk-Pickard, S. (1993) Petrology of syenites from Center 111 of the Coldwell alkaline complex, northwestern Ontario, Canada. Can. J. Earth Sci., 30, 145–58.CrossRefGoogle Scholar
Pan, Y. and Fleet, M.E. (1992) Mineral chemistry and geochemistry of vanadian silicates in the Hcmlo gold deposit, Ontario, Canada. Contrib. Mineral. Petrol., 109, 511–25.CrossRefGoogle Scholar
Sage, R. (1982) Mineralization in diatreme structures north of Lake Superior.Ontario Geological Survey Study 27, Ontario Ministry of Natural Resources, Toronto. 79 pp.Google Scholar
Smyk, M.C., Kingston, D.M. and Taylor, R.P. (1989) Geology of the West Dead Horse Creek Diatrcme- hosted rare metal occurrences, Schrcibcr-Hcmlo District, Ontario. Geoi A.V5. Can.- Min. Ass. Can. Annual Meeting, Program with Abstract 14:A2.Google Scholar
Smyk, M.C., Taylor,R.P., Jones, P.C. and Kingston, D.M. (1993) Geology and geochemistry of the West Dead Horse Creek rarc-metal occurrence, northwestern Ontario. Explor. Mining Geol.y, 2, 245–51.Google Scholar
Waychunas, G.A. (1991) Crystal chemistry of oxides and oxyhydroxides. In Oxide Minerals: petrologic and magnetic significance. Reviews in Mineralogy, 25, Mineral. Soc. Amer., 11—68.Google Scholar