Soesilo, Joko and SUPARKA, Emmy and Abdullah, C. Idham and Schenk, Volker (2010) Petrology and Geochemistry of the Quartz-White Mica Schists in the Luk Ulo Melange Complex, Central Java. Buletin Geologi, 40 (3). pp. 123-138. ISSN 0126-3498
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2010_Buletin Geologi_Petrology and Geochemistry of the Quartz-White Mica Schists in the Luk Ulo Melange Complex, Central Java.pdf Download (12MB) | Preview |
Abstract
The quartz-white mica schist cropped excellently out in Sadang Area, north Kebumen and in Kaliwiro area, south Wonosobo Central Java. It contains bulk of quartz; white mica, albite, garnet, chlorite, epidote with or without subordinate rutile, titanite, calcite, graphite, opaque, and sometime biotite. Its appearance shows medium-coarse grained, foliated, North-northwest gently inclined rock. Rutile and garnet in the assemblage indicated high pressure minerals present in the rock. High Mg, Fe, Si together with Al content of white mica represent phengitic mica while garnet shows average xAlm: xPrp: xSps: xGrs = 0.59:0.05:0.03:0.33 with average xFe = 1.14, of almandine garnet. Geo-thermometry calculation using Fe-Mg exchange on garnet and biotite and geo-barometry calculation using garnet-biotite-white mica-albite yield temperature 3800 C, pressure 15-16 Kbar, and gradient geothermal was about 7,30 C km-1 during metamorphism. It was occurred in about 50 km depth. This gradient geothermal is consistent with prevailing gradient geothermal on eclogite of this complex.
| Item Type: | Article |
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| Subjects: | Q Science > QD Chemistry Q Science > QE Geology |
| Divisions: | Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | JOKO SOESILO - |
| Date Deposited: | 18 Sep 2017 08:31 |
| Last Modified: | 18 Sep 2017 08:31 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/12890 |
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