| 词条 | Winnipegosis komatiite belt |
| 释义 |
The Winnipegosis komatiite belt[1] is an approximately 150 x 30 km linear greenstone belt located in Manitoba, Canada. It has no surface exposure, and was identified based on geophysical signatures and drilling during mining exploration by Cominco during the 1990s [2]. The belt has an age of 1870 ± 7 Ma [3], and is predominantly composed of basaltic and komatiitic volcanic rocks, with minor intrusive igneous and sedimentary rocks [1][2][3]. The belt is considered part of the larger Circum-Superior[4] Large Igneous Province, and was likely generated by a mantle plume [3][5]. See also{{Portal|Volcanism of Canada}}
References1. ^1 Hulbert, L., Stern, R., Kyser, T. K., Pearson, J., Lesher, M., & Grinenko, L. 1994. The Winnipegosis Komatiite Belt, central Manitoba. Page 21 of: Manitoba Mining and Minerals Convention 1994, Program and Abstracts. Manitoba Energy and Mines. {{Canada-geology-stub}}2. ^1 McGregor, C. R. 2011. Open File OF2011-1: GIS compilation of relogged sub-Phanerozoic Precambrian exploration drillcore from the Thompson Nickel Belt, eastern Flin Flon Belt and Winnipegosis Komatiite Belt (parts of NTS 63B, C, F, G, J, K). Manitoba Geological Survey. 3. ^1 2 Waterton, P., Pearson, D. G., Kjarsgaard, B., Hulbert, L., Locock, A., Parman, S. W., & Davis, B. 2017. Age, Origin, and Thermal Evolution of the ultra-fresh ~1.9 Ga Winnipegosis Komatiites, Manitoba, Canada. Lithos, 268-271, 114-130. https://doi.org/10.1016/j.lithos.2016.10.033 4. ^Baragar, W. R. A., & Scoates, R. F. J. 1981. The Circum-Superior Belt: A Proterozoic plate margin? Chap. 12, pages 297 { 330 of: Kroner, A. (ed), Developments in Precambrian Geology, vol. 4. Elsevier. https://doi.org/10.1016/S0166-2635(08)70017-3 5. ^Ciborowski, T. J. R., Minifie, M. J., Kerr, A. C., Ernst, R. E., Baragar, B., & Millar, I. L. 2017. A mantle plume origin for the Palaeoproterozoic Circum-Superior Large Igneous Province. Precambrian Research, 294, 189-213. https://doi.org/10.1016/j.precamres.2017.03.001 3 : Volcanism of Manitoba|Volcanic belts|Paleoproterozoic volcanism |
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