THE SINISTRAL STRIKE SLIP FAULT AS AMPANA BASIN CONTROLLER IN CENTRAL SULAWESI

Rahmat Yantono Saragih, Iyan Haryanto, Emi Sukiyah, Nisa Nurul Ilmi, Edy Sunardi

Abstract


The presence of gas seepage born in Tanjungapi precisely in the southwestern part of the basin.
This remission is supposed to be formed from main rocks of Mesozoic aged. The condition of
Ampana Basin formation cannot be separated from the effect of the relatively northeast-southeast
sinistral strike-slip-fault. Based on the 43 outcrop, the main deformation product was identified as
an extensional/hybrid joint with a relatively west-east fault line structure on average shear strain
(η) = 58
o
(+) to (η) = 60
o
(+) and in form of the relatively northwest-southeast strike-slip-fault
structure line with the range of shear strains value between (η) = 45
o
(+) to (η) = 54
o
(+). The
kinematics movement of relatively vertical main stress gives a subsidence impact on the surface
of Mesozoic-Paleogenic aged rock. The sedimentation process of Neogene-aged clastic, from the
Bongka Formation, Kingtom Formation, and Lonsio Formation ran fast and make the lower
Mesozoic-Paleogene-aged rock being burdened by the upper younger rocks. The tectonic
development in Ampana Basin is recorded in Lonsio Formation, Bongka Formation, and limestone
in the form of structural indication and deformation showing the period of Central Miocene to
Holocene tectonic with the relatively west-east direction of the main regional stress.
Keywords: Ampana basin, deformation, strike slip fault, Sulawesi, Tanjungapi


References


Anderson, E.M. (1951). The dinamics of

faulting. Oliver & Boyd, Edinburgh.

Cottam, M.A., Hall, R., Forster, M.A., and

Boudagher-Fadel, M.K.

(2011).

Basement Character and Basin

Formation in Gorontalo Bay, Sulawesi,

Indonesia: New Observation from The

Togian Islands. The SE Asian Gateway:

History and Tectonics of The AustraliaAsia

Collision. Geological Society,

London, Special Publication, 355, 177202.

DOI:

1144/SP355.9.

Hamilton,

W.R. (1979). Tectonics of The

Indonesia Region. United States

Geological Survey 1078, 345 pp.

Hinschberger, F., Malod, J.-A., Rehault, J.-P.,

Dyment, J., Honthaas, C., Villeneuve,

M., and Burhanuddin, S. (2000).

Origine et Evolution du Bassin NordBanda

(Indonesie): Apport des

donness Magnetiques. Comptes

Rendus de l’Academie des Sciences,

Paris, 331, 507-514.

Jezek, P.A., Whitford, D.J., and Gill, J.B.

(1981). Geochemistry of The Recent

Lavas from The Sangihe-Sulawesi Arc,

Indonesia (Edited by Barber, A.J. and

Wiyosujono, S.), Geol. Res. & Develop.

Centre Spec. Pub. 2, 383-389.

Mcclay, K. (1991). The Mapping of Geological

Structures, The Geological Field Guide

Series. John Wiley & Sons, New York.

Park, R.G. (1988). Geological Structures and

Moving Plates. Blackie, Glasgow.

Priadi, B., Polve, M., Maury, R.C., Bellon, H.,

Soeria-Atmadja, R., Joron, J.L., and

Cotten, J. (1994). Tertiary and

Quaternary Magmatism in Central

Sulawesi:

Chronological

and

Petrological Constraints. Journal of

Southeast Asian Earth Science, Vol.9,

No.1/2, pp. 81-93.

Rickard, M.J. (1972). Classification of

Translational Fault Slip. Geological

Society of America.

Rusmana E., Koswara A., and Simandjuntak T.

O. (1993). Geological Map of Luwuk

Quadrangle, Sulawesi. Geological

Research and Development Centre,

Bandung.

Simandjuntak T.O., Surono, and Supandjono

J.B. (1997). Geological Map of Poso

Quadrangle, Sulawesi. Geological

Research and Development Centre,

Bandung.

Walpersdorf, A., Rangin, C., and Vichy, C.

(1998). GPS Compared to Long-Term

Geologic Motion of The North Arm of

Sulawesi. Earth and Planetary Science

Letters, 159, 47-55.




DOI: https://doi.org/10.24198/gsag.v4i2.18289

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