Neogene Tectonics And Paleomagnetism Of The Western And Eastern Of Palu Bay, Central Sulawesi, Indonesia

Southeast Asian Conference on Geophysics

Muin, M.R.^1,4 ; Pramumijoyo, S.^2 ; Warmada, I.W.^2 ; Suryanto, W.^3

PhD Candidate, Geological Engineering, Gadjah Mada University, Indonesia^1

Geological Engineering, Gadjah Mada University, Indonesia^2

Geophysics, Gadjah Mada University, Indonesia^3

Geophysics, Tadulako University, Indonesia^4

关键词: Granitic rocks;    In compositions;    Indonesia;    Magnetic studies;    Neogene tectonic;    Peraluminous;    Rotational motion;    Tectonic models;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/62/1/012003/pdf
DOI  :  10.1088/1755-1315/62/1/012003

来源: IOP

【 摘 要 】

Geologic observations and paleo magnetic studies of the western and eastern Palu Bay was undertaken, in order to study the extent of rotated areas and to develop constraints on tectonic models concerning the formation of this bay. Characteristic of remanent magentization (ChRM) results from Palu bay, the western show that; yield a pole at -39.116°N, 119.895°E with R=13.99, α95=0,42, Dm/Im=61.76/-26.7 and the Eastern Palu bay show that; yield a pole at -81.855°N, 52.913°E, R=8.99, α95=0.29, Dm/Im=67.1/-5.42. The granitic rocks in these areas are dominated by granite and Monzonit-Quartz in composition, with high-K calc-alkaline photasik (KAP) and show metaluminous-peraluminous affinity. This suggests that the rotational motion on both sides of the bay are similar during the Neogen.