K-Ar ages on rocks from the crater at Brent, Ontario
作者： M. Shafiqullah , W.M. Tupper , T.J.S. Cole
DOI: 10.1016/S0012-821X(68)80031-7
关键词:
摘要: The genesis of the fossil crater at Brent is a stimulating contemporary geological debate. Meteorite impact and endogenic models are being considered. Geological evidence suggests formed 475 to 750 m.y. ago. One K/Ar age determination on alnoite from has an 576 ± 40 Dates four rock samples described as microsyenites or “melt rocks” below fall between 310 365 If carliey than ago, these young ages could be result younger hydrothermal alteration, although rocks themselves do not support this interpretation. apparent true ages, have significantly later can by meteorite impact.
harvard.edu
elsevier.com
sci-hub.se 参考文章(12)
K. L. Currie, ANALOGUES OF LUNAR CRATERS ON THE CANADIAN SHIELD Annals of the New York Academy of Sciences. ,vol. 123, pp. 915- 940 ,(1965) , 10.1111/J.1749-6632.1965.TB20410.X
H Baadsgaard, J Lipson, R.E Folinsbee, The leakage of radiogenic argon from sanidine Geochimica et Cosmochimica Acta. ,vol. 25, pp. 147- 157 ,(1961) , 10.1016/0016-7037(61)90129-6
K. L. CURRIE, M. SHAFIQULLAH, Carbonatite and Alkaline Igneous Rocks in the Brent Crater, Ontario Nature. ,vol. 215, pp. 725- 726 ,(1967) , 10.1038/215725A0
J. Gittins, R. M. Macintyre, D. York, THE AGES OF CARBONATITE COMPLEXES IN EASTERN CANADA Canadian Journal of Earth Sciences. ,vol. 4, pp. 651- 655 ,(1967) , 10.1139/E67-042
H. W. Fairbairn, G. Faure, W. H. Pinson, P. M. Hurley, J. L. Powell, Initial ratio of strontium 87 to strontium 86, whole-rock age, and discordant biotite in the Monteregian Igneous Province, Quebec Journal of Geophysical Research. ,vol. 68, pp. 6515- 6522 ,(1963) , 10.1029/JZ068I024P06515
M. R. Dence, THE EXTRATERRESTRIAL ORIGIN OF CANADIAN CRATERS Annals of the New York Academy of Sciences. ,vol. 123, pp. 941- 969 ,(1965) , 10.1111/J.1749-6632.1965.TB20411.X
P. S. Kumarapeli, V. A. Saull, THE ST. LAWRENCE VALLEY SYSTEM: A NORTH AMERICAN EQUIVALENT OF THE EAST AFRICAN RIFT VALLEY SYSTEM Canadian Journal of Earth Sciences. ,vol. 3, pp. 639- 658 ,(1966) , 10.1139/E66-045
J. L. Kulp, Geologic Time Scale: Isotopic age determinations on rocks of known stratigraphic age define an absolute time scale for earth history. Science. ,vol. 133, pp. 1105- 1114 ,(1961) , 10.1126/SCIENCE.133.3459.1105
H. Fechtig, S. Kalbitzer, The Diffusion of Argon in Potassium-Bearing Solids Springer, Berlin, Heidelberg. pp. 68- 107 ,(1966) , 10.1007/978-3-642-87895-4_4
G. M. KAY, Ottawa-Bonnechere graben and Lake Ontario homocline Geological Society of America Bulletin. ,vol. 53, pp. 585- 646 ,(1942) , 10.1130/GSAB-53-585