Analysis of Palaeomagnetic Data from the New Hebrides

David A. Falvey

doi:10.1071/EG978117

ISSN: 0812-3985
E-ISSN: 1834-7533

Analysis of Palaeomagnetic Data from the New Hebrides
Authors David A. Falvey^a
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^a Department of Geology and Geophysics, University of Sydney, , Sydney, , N.S.W., 2006
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 9, Issue 3, Sep 1978, p. 117 - 123
DOI: https://doi.org/10.1071/EG978117
- Published online: 01 Sep 1978

Abstract

Palaeomagnetic samples have been collected on eight islands of the New Hebrides island arc. Data are presented for 31 stable sites out of 46 with ages ranging from Pleistocene to early Late Miocene. These data show 30° clockwise rotation of the arc commencing 6 m.y. BP. Synthetic polar wander paths corresponding to microplate rotation may be computed from known major plate polar wander paths. Thus a physiographically reasonable reconstruction of the New Hebrides plate is shown to have a polar wander path which compares well with the observed data. A reconstruction of a pre-Late Miocene double arc, consisting of the Solomons, New Hebrides- Vityaz, Fiji and Lau-Tonga island arcs, is possible which supports interarc geological correlations and which suggests Plio-Pleistocene growth of the North Fiji Basin byr-r-rtriple junction development concomitant with the development of the Lau Basin.

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1978-09-01

2026-01-25

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References

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CARNEY, J.N., and MACFARLANE, A., 1978. Lower-Middle Miocene sediments on Maewo, New Hebrides, and the significance of their correlation with Eocene-Middle Miocene rocks on Viti Levu, Fiji. This issue
CHASE, C.G., 1971. Tectonic history of the Fiji Plateau. Geol. Soc. Am. Bull. 82: 3087-3110
COLLEY, H., and WARDEN, A.J., 1974. Petrology of the New Hebrides. Geol. Soc. Am. Bull. 85: 1635-1646
FALVE Y, D.A., 1975. Arc reversals, and a tectonic model for the North Fiji Basin. Aust. Soc. Explor. Geophys. Bull. 6: 47-49
GILL, J.B., and GORTON, M.P., 1975. A proposed geological and geochemical history of Eastern Melanesia. In Coleman, P.J. (Ed.). The Western Pacific: Island Arcs, Marginal Seas and Geochemistry. Univ. of W. Aust. Press, Perth: 543-566
GILL, J.B., and McDOUGA LL, I., 1973. Biostratigraphic and geological significance of the Miocene-Pliocene volcanism in Fiji. Nature 241: 176-180
GORTON, M.P., 1974. The Geochemistry and Geochronology of the New Hebrides. Ph.D. Thesis, Australian National University, 300 pp. (unpubl.)
JAMES, A., and FALVEY, D., 1978. Analysis of palaeomagnetic data from Viti Levu, Fiji. This issue
MCELHINNY, M.W., 1964. Statistical significance of the fold test in palaeomagnetism. Geophys. J. Roy. astron. Soc. 8: 338-340
MCELHINNY, M.W.,EMBLETON, B.J.J., and WELLMAN, P., 1974. A synthesis of Australian Cenozoic palaeomagnetic results. Geophys. J. Roy. astron. Soc. 36: 141-151
PACKHAM, G.H., and FALVEY, D.A., 1976. Palaeogene Pacific-India plate interaction (Abstr.l. 25th Int. Geol. Congr. 3: 876
WEISSEL, J.K., 1977. Evolution of the Lau Basin by the growth of small plates. In Talwani, M., and Pitman III, W.C. (Eds.), Island Arcs Deep Sea Trenches and Back-Arc Basins, Am. Geophys. Un., Maurice Ewing Ser. 1: 429-436

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Article Type: Research Article

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Analysis of Palaeomagnetic Data from the New Hebrides

Abstract

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