Abstract
abstract Travel-time data are given at 25 km. intervals between 50 and 500 km. for traverses west, south, east, and north of Johannesburg. These derive from numerous seismograms of Witwatersrand earth tremors taken by means of a triggering technique. The only phases considered to be consistent are those mentioned below, and few signs of a change of velocity with depth were discovered. There were no great differences in the results for the various directions, and the mean results were: P 1 = + 0.24 + Δ / 6.18 sec . S 1 = + 0.37 + Δ / 3.66 sec . P n = + 7.61 + Δ / 8.27 sec . S n = + 11.4 + Δ / 4.73 sec . which give crustal depths of 35.1 and 33.3 km. from P and S data respectively. These depths include about 1.3 km. of superficial material of lower velocity.
References
6
Referenced
51
10.1785/BSSA0390020117
/ Bull. Seism. Soc. Am. / Triggered Telerecording Seismic Equipment by Gane (1949){'key': '2021052617011061700_BIB2', 'first-page': '183', 'article-title': 'The Vredefort Structures as Revealed by a Gravimetric Survey', 'volume': '47', 'author': 'Maree', 'year': '1945', 'journal-title': 'Trans. Geol. Soc. So. Africa'}
/ Trans. Geol. Soc. So. Africa / The Vredefort Structures as Revealed by a Gravimetric Survey by Maree (1945){'key': '2021052617011061700_BIB3', 'first-page': '658', 'article-title': "Studies of the Earth's Crust Using Waves from Explosions", 'volume': '97', 'author': 'Tatel', 'year': '1953', 'journal-title': 'Proc. Am. Philos. Soc.'}
/ Proc. Am. Philos. Soc. / Studies of the Earth's Crust Using Waves from Explosions by Tatel (1953)10.1029/JZ059i003p00415
/ Jour. Geophys. Research / Crustal Structure from Seismic Exploration by Tuve (1954){'key': '2021052617011061700_BIB5', 'first-page': '532', 'article-title': 'Seismic Crustal Exploration, Colorado Plateau, and Wasatch-Uinta Mountains', 'volume': '36', 'author': 'Tuve', 'year': '1955', 'journal-title': 'Trans. Am. Geophys. Union'}
/ Trans. Am. Geophys. Union / Seismic Crustal Exploration, Colorado Plateau, and Wasatch-Uinta Mountains by Tuve (1955)10.1785/BSSA0420010053
/ Bull. Seism. Soc. Am. / A Seismic Investigation of Crustal Structure in the Western Transvaal by Willmore (1952)
Dates
Type | When |
---|---|
Created | 4 years, 3 months ago (May 26, 2021, 1:26 p.m.) |
Deposited | 4 years, 3 months ago (May 26, 2021, 1:26 p.m.) |
Indexed | 2 months ago (July 4, 2025, 8:47 a.m.) |
Issued | 68 years, 11 months ago (Oct. 1, 1956) |
Published | 68 years, 11 months ago (Oct. 1, 1956) |
Published Online | 68 years, 11 months ago (Oct. 1, 1956) |
Published Print | 68 years, 11 months ago (Oct. 1, 1956) |
@article{Gane_1956, title={Crustal structure in the Transvaal*}, volume={46}, ISSN={0037-1106}, url={http://dx.doi.org/10.1785/bssa0460040293}, DOI={10.1785/bssa0460040293}, number={4}, journal={Bulletin of the Seismological Society of America}, publisher={Seismological Society of America (SSA)}, author={Gane, P. G. and Atkins, A. R. and Sellschop, J. P. F. and Seligman, P.}, year={1956}, month=oct, pages={293–316} }