Index of Active Tectonic Assessment: Quantitative-based Geomorphometric and Morphotectonic Analysis at Way Belu Drainage Basin, Lampung Province, Indonesia
| Autor: | Dewi Gentana, Nana Sulaksana, Euis Tintin Yuningsih, Emi Sukiyah |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
geography
geography.geographical_feature_category General Computer Science Subduction General Engineering Drainage basin 020206 networking & telecommunications Fracture zone 02 engineering and technology Structural basin Fault (geology) 010502 geochemistry & geophysics 01 natural sciences Tectonics 0202 electrical engineering electronic engineering information engineering General Agricultural and Biological Sciences Joint (geology) Geomorphology Drainage density Geology 0105 earth and related environmental sciences |
| Zdroj: | International Journal on Advanced Science, Engineering and Information Technology. 8:2460 |
| ISSN: | 2460-6952 2088-5334 |
| Popis: | The occurrence of subduction zones caused by the collision between the Eurasian-Western Indonesia Plate due to an increase tectonic, volcanic and magmatic activities along Sumatra Island. This study covers the area of Way Belu Drainage Basin, located near Bandar Lampung City, Lampung Province, southern part of Sumatra, Indonesia. The area composes of a complex geological structure as the result of tectonic activities. In this study, geomorphic indices assessment such as morphometric and morphotectonic quantitative analysis are undertaken to identify the Index of Active Tectonics ( IAT ). The morphometric analysis uses Drainage density ( D d ) and Ratio of bifurcation ( R b ). The value of D d respectively from 1.45 to 4.05, R b from 2 to 10. While the morphotectonic analysis uses basin shape index ( Bs ), valley floor width-valley height ratio ( V f ), and asymmetry factor ( AF ). The value of Bs from 1.27 to 6.25, V f from 0.16 to 3.30, and AF from 22.73 to 83.77 in ranges which is derived average IAT value is 2.20. It may considered that at the Way Belu Drainage Basin has moderate to high tectonic activity. From the joint measurement results on the fracture zone express that the main pattern of faults has trend NWW-SSE, NE-SW, NNE-SSW, NW-SE, and W-E directions. Furthermore, based on the combination of the quantitative geomorphology indices assessment which is supported by remote sensing and field assessment shows that those features closely related to the Semangko Fault System with the NNW-SSE fault trend parallel to its fault. |
| Databáze: | OpenAIRE |
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