IDENTIFICATION OF VOLCANIC ROCKS IN IMOGIRI YOGYAKARTA BASED ON SUBSURFACE GEOLOGIC DATA

Winarti, . and Hill Gendoet Hartono, . (2015) IDENTIFICATION OF VOLCANIC ROCKS IN IMOGIRI YOGYAKARTA BASED ON SUBSURFACE GEOLOGIC DATA. In: nternational Conference on Engineering of Tarumanagara (ICET 2015), 22-23 Oktober 2015, TarumanagaraUniversity.

Text (nternational Conference on Engineering of Tarumanagara (ICET 2015)) 10_IDENTIFICATION OF VOLCANIC ROCKS IN IMOGIRI YOGYAKARTA BASED ON SUBSURFACE GEOLOGIC DATA.pdf - Published Version Download (765kB)

Abstract

Abstract
Physiographically, the research area is located in the margin of Yogyakarta and the western part of South Mountain Yogyakarta. Morphology and lithologically, through along of Imogiri could be identified that there are ancient volcanoes. Those could be proved by discovered of the volcanic rocks such as lava, breccias, and tuff. The aim of this research is identifying the presence of volcanic rocks in the length of Imogiri based on subsurface geologic data. To find out the sub surface condition, the geoelectric method of mapping used in this research by dipole configuration at four location (lines) namely in the Karang Asem – Dengkeng, Plencing, Siluk – Selopamioro, and Sindet area. The geoelectric measurement by mapping will be resulted of resistivity profile. Based on the price range of resistivity from those profile, it could be interpreted that the lithology through the length of each line. Each location (line) was measured along 500 metres.The result of measuring on line 1, there are volcanic rocks such as basaltic lava (ρ>600 Ωm), distributed in the northwest to southest in depth of > 30 metres. On line 2, the volcanic rocks can be found such as pyroclastic breccia (ρ>1000 Ωm) in depth of > 20 metres. On line 3, it may be intepreted as the volcanic rocks such lava (ρ = 1000 Ωm), which can be found on the centre part in depth of > 20 metres. On line 4, it it may be intepreted as the volcanic rocks such as lava (ρ = 1100 Ωm), which can be found on the centre part in depth of > 20 metres
Keywords : the volcanic rocks, mapping, resistivity, Imogiri

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	the volcanic rocks, mapping, resistivity, Imogiri
Subjects:	Q Science > QE Geology
Depositing User:	suma SR romdani
Date Deposited:	11 Dec 2020 22:36
Last Modified:	11 Dec 2020 22:36
URI:	https://repository.itny.ac.id/id/eprint/2585

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