Kenneth J. Billard

B. Sc. Honours Thesis

Geophysical Modelling of the LaHave Clay and Emerald Silt Formations, Lahave Basin

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A seismic reflection profile across part of the LaHave Basin shows 4 continuous, strong reflectors. This study relates the observed seismic reflection data to the measured physical properties (velocity, density, porosity, and grain size) in two piston cores taken along the profile. The products of velocity and density yield acoustic impedance which, combined with the observed seismic wavelet, results in a synthetic seismogram. Reflections in the synthetic seismogram for one piston core correlates with 4 continuous reflectors in the LaHave Basin: A separates silty clay from sand-silt-clay; B demarcates the Transition zone; C corresponds to a sand-silt-clay layer; and D and E coincide with a non-depositional unconformity. Anomalies A through E are missing in the synthetic seismogram for the second piston core as a result of the non-depositional unconformity at DE.

Kwywords:
Pages: 88
Supervisor:  Kate Moran