Sutarto, Sutarto and Kusumayudya, Sari and Murwanto, Helmy and Faranisya, Soraya (2018) Rock types characteristics of Prambanan and Sambisari Temples, Yogyakarta Province, Indonesia. In: International Conference on Earth Science, Mineral and Energy (ICEMINE) 2018, 15-16 October 2018, YOGYAKARTA.
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2018_Sutarto, Bahagiarti, Murwanto and Faranisa_Rock types characteristics of Prambanan and Sambisari Temples,.pdf Download (1MB) | Preview |
Abstract
Many Hindu and Buddhist temples built in the 8th to 10th centuries are found in the Yogyakarta Province, Indonesia, including Prambanan and Sambisari temples. Based on petrographic and geochemical observations, both temples are built using basaltic to andesitic lavas and pumice breccias. The rock types are relatively similar to those the basaltic to andesitic lavas around the Quaternary age Merapi volcano, and the pumice breccia of the Tertiary age Semilir Formation in the Piyungan area situated at the south of the Prambanan temple. Selected rocks samples were analized using petrographic and X-ray fluorescence methods to identify minerals, textures and geochemical characteristics. Petrographic observations show that the rocks used to build Prambanan temple are hornblende-pyroxene andesite and pyroxene basalts, while the rocks of Sambisari temple consist of hornblendepyroxene andesites and pumice breccias. Hornblende-pyroxene andesite is generally gray, showing porphyritic texture, 1-3 mm crystal size; phenocrysts are composed by plagioclase, hornblende, pyroxene, and opaque minerals set in groundmass of plagioclase microcrysts and volcanic glass. Pumice breccia, showing a light gray colour, moderate sorting, fragments, consist of andesite and pumice clasts in size range 2-6 cm, embedded in sandy to clay matrix. Most of the rocks are generally weathered or oxidized, which is reflected by the presence of secondary iron oxide. This is probably most of the basaltic to andesitic lavas used had a high vesicular texture, and that Yogyakarta has a tropical climate. Keywords: rock types, Prambanan Temple, Sambisari Temple
| Item Type: | Conference or Workshop Item (Paper) |
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| Subjects: | Q Science > QE Geology |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Dr.Ir SUTARTO - |
| Date Deposited: | 22 Jan 2019 07:35 |
| Last Modified: | 22 Jan 2019 07:35 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/18098 |
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