Secular gravity changes: measurements and predictions for selected Canadian sites

Secular variations in surface gravity (ġ) over Canada are dominated by the Late Wisconsin deglaciation signal. Theoretical modelling of this deglaciation shows that the maximum values for ġ are to be expected around Hudson Bay. Using the JILA-2 absolute gravity apparatus of the Geological Survey of...

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Bibliographic Details
Published in:Canadian Journal of Earth Sciences
Main Authors: Tushingham, A. M., Lambert, A., Liard, J. O., Peltier, W. R.
Format: Article in Journal/Newspaper
Language:English
Published: Canadian Science Publishing 1991
Subjects:
General Earth and Planetary Sciences
Hudson Bay
Canada
Hudson
Online Access:http://dx.doi.org/10.1139/e91-049
http://www.nrcresearchpress.com/doi/pdf/10.1139/e91-049
Description
Summary:Secular variations in surface gravity (ġ) over Canada are dominated by the Late Wisconsin deglaciation signal. Theoretical modelling of this deglaciation shows that the maximum values for ġ are to be expected around Hudson Bay. Using the JILA-2 absolute gravity apparatus of the Geological Survey of Canada, it should be possible to determine ġ at three sites near Hudson Bay by about 1993 and at more sites soon afterward. Secular rates of the ongoing postglacial-adjustment process will soon be determined at inland sites where no contemporary rates have been available.

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