Identification of Mengkarang Isoclinal Folds Against the Effect of Sumatran Fault Force in Air Batu Village and Surrounding Merangin Jambi Geopark

Magdalena Ritonga, Tobi Prayoga

Abstract


The Merangin area, in particular, has experienced several tectonic phases and stages of change in the direction of the regional structure. In addition, on this island found, rocks of the Paleozoic age, their unique tectonic, geological system and constituent rocks will produce fascinating geological reconstructions. The unique tectonic design and constituent stones will have an absorbing geological reconstruction. The research methods include literature review, field observations, measurements, and studio analysis. Based on the literature and the research location approach, the research area is located in the physiographic zone of the Sumatera fault. Based on field observations, it is known that the constituent rocks are sedimentary, pyroclastic materials and intrusive granite rocks. The formations that arrange these rocks are the Mengkarang formation (Permian), the Tantan granite formation (Jurassic-Cretaceous), and the Kasai Formation (Tertiary). The fault data that passes through the building is the Sumatran fault with the position of Strike/Dip N322°E/76°, Bearing N135°E, and Rake 36°. This regional fault resulted in ductile rocks being repeatedly folded with an orientation approaching West-East; this can be observed in one of the fold data with the general direction of flank 1 N2850E/440 and the general rule of side 2 N136°E/42°. The result of the analysis is an anticline; this anticline occurs repeatedly and is referred to as an isoclinal fold perpendicular to the orientation direction of the Sumatran Fault. The pattern and movement of those folds and faults are by following under the concept of the wrench fault, which states that the fault strongly influences the formation of folds. Those folds will be perpendicular to the fault pattern.

Keywords


Tectonics; Paleozoic; Fault; Fold; Intrusive; Mengkarang

References


Twiss and More, Structural Geology Newyork, W.H. Freeman & Company, 1992.

Matysoya et al., “Burial and preservation of a fossil forest on an early Permian (Asselian) volcano (Merangin River, Sumatra, Indonesia)”. Geological J, Vol 53. P. 2352. Dec.2017, doi.org/10.1002/gj.3072. 2352-2370.

M.J. Crow et al., The geochemistry, tectonic and palaeogeographic setting of the Karing Volcanic Complex and the Dusunbaru pluton, an Early Permian volcanic plutonic centre in Sumatera, Indonesia,” J. Asian Earth Sci, vol.169. p.257, Jan. 2019, doi.org/10.1016/j.jseaes.2018.08.003 2019. 257-283.

Bemmelem. Van, R.W., The Geology Of Indonesia.MartinusNyhoff. Netherland: The Haque. 1949.

Natawidjaja, D.H. (2018), “Updating active fault maps and slip rates along the Sumatran Fault Zone, Indonesia. Proc. Global Colloqium on GeoSciences and Engineering, Bandung 2017, IOP conf. Series, Earth Environm. Science 118, 012001, p. 1-11. DOI:10.1088/1755-1315/118/1/012001.

Metcalfe, L. “Tectonic Framework and Phanerozoic Evolution Of Sundaland”, Gondwana Res, vol.19. p.3, Jan.2011. doi:10.1016/jgr.2010.02.016

Swarna, N et al.. Geological Map Og The Sarolangun Quadrangle (0913), Sumatera Scale 1 : 250.000. 1994.

Crippa, G et al., Brachiopods, fusiliers and palynomorphs of the Mengkarang Formation (Early Permian, Sumata) and their Paleobiogeographical significance,”. J. Asian Earth Sci. Vol.79, p. 206. Jan. 2014.doi.10.1016/j.jseaes.201309.030.206-223

Pullonggono et al, C.G. 1992. Pre-tertiary And Tertiary Fault System As A Framework Of The Sumatera Basin: A Study Of Sar-Maps, Indonesia: Proceeding Of 21Th IPA Annual Convention.

Moody, J. D, Hill, M.J. “Wrench Fault Tectonics”, America: Bulletin Of The Geological Society, v.67. no.9, p.1207.Sep. 1956. 1207




DOI: https://doi.org/10.31284/j.iptek.2022.v26i1.2999

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