Afany, Miseri Roeslan and Partoyo, Partoyo (2001) PENCIRIAN ABU VULKANIK SEGAR GUNUNG MERAPI YOGYAKARTA. Jurnal TANAH DAN AIR, 2 (2). pp. 88-96. ISSN 1411-5719
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Abstract
This research was aimed to characterize some mineralogical, chemical, and physical properties of fresh volcanic ash from Mt. Merapi eruption in 1999. Discussion was related to its role as soil parent material, soil amendment, and also as an environment annoyance. Volcanic ash was sampled at Srumbung, Magelang, about 5 km from the top of the mount to the Northwest slope direction. Samples were collected from surface of leaf or house roof, which had been deposited for two days since the eruption took place. Samples ere taken from several places and then were composited. The samples were analyzed for mineralogy of clay and sand fraction, texture, particle density, bulk density, water holding capacity, pH H2O, pH KCl, pH NaF, pH abrasive, total and available Al, Fe, Si, Ca, Mg, K, P, Na, Cu, Zn, and Pb. The result showed that clay fraction was dominated by primary mineral feldspar. Sand and silt fraction consist of stone fraction 60%, labradorit 28% and some accessories minerals, i.e. bithownite, anorthit, and augit. pH H2O 4.75 and pH NaF 10.5 The material was dominated by Si (56%), followed respectively by Al, Fe, Ca, Mg, and P. Heavy metal content was trace. Texture consists of 76% sand, 21% silt, and 3% sand fraction. Particle density was 2.62 g/cm3, bulk density was 1.02 g/cm3, and moisture content was 39.7% at pF 2.54 and 19% at pF 4.2 Keywords: volcanc ash, Merapi, Java, Indonesia, mineralogy
| Item Type: | Article |
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| Uncontrolled Keywords: | Merapi, Indonesia, Yogyakarta, volcanic ash, mineralogy, eruption |
| Subjects: | G Geography. Anthropology. Recreation > G Geography (General) G Geography. Anthropology. Recreation > GB Physical geography G Geography. Anthropology. Recreation > GE Environmental Sciences S Agriculture > S Agriculture (General) |
| Depositing User: | PARTOYO . |
| Date Deposited: | 08 Nov 2017 02:17 |
| Last Modified: | 24 May 2019 05:09 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/13700 |
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