Subsurface S-type Granitoid Identification Based on Gravity and Seismic Tomography Models in Pacitan, East Java
Granitoid outcrop has been observed in Montongan, Tulakan Subdistrict, Pacitan District, East Java. Geochemically, granitoid shows peralluminous S-type granitoid which consists of comparable plagioclase and potassium feldspar leading to adamelite and granodiorite variety with andalusite, fine size c...
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| Format: | Article |
| Language: | English |
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Center for Nuclear Minerals Technology
2018-11-01
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| Series: | Eksplorium: Buletin Pusat Pengembangan Bahan Galian Nuklir |
| Subjects: | |
| Online Access: | http://jurnal.batan.go.id/index.php/eksplorium/article/view/4954 |
| _version_ | 1818725442291499008 |
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| author | Joko Soesilo Indriati Retno Palupi Wiji Raharjo Sutanto Faris Ahad Sulistyohariyanto Kevin Gardo Bangkit Ekaristi Fandi Budi Stiawan |
| author_facet | Joko Soesilo Indriati Retno Palupi Wiji Raharjo Sutanto Faris Ahad Sulistyohariyanto Kevin Gardo Bangkit Ekaristi Fandi Budi Stiawan |
| author_sort | Joko Soesilo |
| collection | DOAJ |
| description | Granitoid outcrop has been observed in Montongan, Tulakan Subdistrict, Pacitan District, East Java. Geochemically, granitoid shows peralluminous S-type granitoid which consists of comparable plagioclase and potassium feldspar leading to adamelite and granodiorite variety with andalusite, fine size corundum and cordierite inside. These modal minerals are consistent with its bulk chemical analysis result that shows alumina rich rock. Highly weathered spotted pinkish soil with remaining quartz gravels characterizes its surface. Lateritic pink soil up to more than 25 meters thick covers the granitoid body and this feature is indicative to locate its surface distribution, while its subsurface distribution is remain uncertain. The research aimed to identify granitoid subsurface distribution. To identify the subsurface body, gravity and seismic tomography models were used. According gravity model, the pluton body is 5 km wide which is rootless downward and seems extends eastward. Meanwhile, the north-south seismic tomographic model across Pacitan Region indicates dense solid body override the recent Java subduction zone. The body is assumed to have correlation with surface granitic rock. It supports an idea that there is a micro continent trapped beneath Southern Mountain of East Java. |
| first_indexed | 2024-12-17T21:42:22Z |
| format | Article |
| id | doaj.art-84ecb1230f4847b79defcc26a21ac129 |
| institution | Directory Open Access Journal |
| issn | 0854-1418 2503-426X |
| language | English |
| last_indexed | 2024-12-17T21:42:22Z |
| publishDate | 2018-11-01 |
| publisher | Center for Nuclear Minerals Technology |
| record_format | Article |
| series | Eksplorium: Buletin Pusat Pengembangan Bahan Galian Nuklir |
| spelling | doaj.art-84ecb1230f4847b79defcc26a21ac1292022-12-21T21:31:35ZengCenter for Nuclear Minerals TechnologyEksplorium: Buletin Pusat Pengembangan Bahan Galian Nuklir0854-14182503-426X2018-11-013927584http://dx.doi.org/10.17146/eksplorium.2018.39.2.4954Subsurface S-type Granitoid Identification Based on Gravity and Seismic Tomography Models in Pacitan, East JavaJoko Soesilo0Indriati Retno Palupi1Wiji Raharjo2Sutanto3Faris Ahad Sulistyohariyanto4Kevin Gardo Bangkit Ekaristi5Fandi Budi Stiawan6Teknik Geologi, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional “Veteran” YogyakartaTeknik Geofisika, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional “Veteran” YogyakartaTeknik Geofisika, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional “Veteran” YogyakartaTeknik Geologi, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional “Veteran” YogyakartaTeknik Geologi, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional “Veteran” YogyakartaTeknik Geofisika, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional “Veteran” YogyakartaTeknik Geofisika, Fakultas Teknologi Mineral, Universitas Pembangunan Nasional “Veteran” YogyakartaGranitoid outcrop has been observed in Montongan, Tulakan Subdistrict, Pacitan District, East Java. Geochemically, granitoid shows peralluminous S-type granitoid which consists of comparable plagioclase and potassium feldspar leading to adamelite and granodiorite variety with andalusite, fine size corundum and cordierite inside. These modal minerals are consistent with its bulk chemical analysis result that shows alumina rich rock. Highly weathered spotted pinkish soil with remaining quartz gravels characterizes its surface. Lateritic pink soil up to more than 25 meters thick covers the granitoid body and this feature is indicative to locate its surface distribution, while its subsurface distribution is remain uncertain. The research aimed to identify granitoid subsurface distribution. To identify the subsurface body, gravity and seismic tomography models were used. According gravity model, the pluton body is 5 km wide which is rootless downward and seems extends eastward. Meanwhile, the north-south seismic tomographic model across Pacitan Region indicates dense solid body override the recent Java subduction zone. The body is assumed to have correlation with surface granitic rock. It supports an idea that there is a micro continent trapped beneath Southern Mountain of East Java.http://jurnal.batan.go.id/index.php/eksplorium/article/view/4954granitoidpacitans-type granitetomographygravity |
| spellingShingle | Joko Soesilo Indriati Retno Palupi Wiji Raharjo Sutanto Faris Ahad Sulistyohariyanto Kevin Gardo Bangkit Ekaristi Fandi Budi Stiawan Subsurface S-type Granitoid Identification Based on Gravity and Seismic Tomography Models in Pacitan, East Java Eksplorium: Buletin Pusat Pengembangan Bahan Galian Nuklir granitoid pacitan s-type granite tomography gravity |
| title | Subsurface S-type Granitoid Identification Based on Gravity and Seismic Tomography Models in Pacitan, East Java |
| title_full | Subsurface S-type Granitoid Identification Based on Gravity and Seismic Tomography Models in Pacitan, East Java |
| title_fullStr | Subsurface S-type Granitoid Identification Based on Gravity and Seismic Tomography Models in Pacitan, East Java |
| title_full_unstemmed | Subsurface S-type Granitoid Identification Based on Gravity and Seismic Tomography Models in Pacitan, East Java |
| title_short | Subsurface S-type Granitoid Identification Based on Gravity and Seismic Tomography Models in Pacitan, East Java |
| title_sort | subsurface s type granitoid identification based on gravity and seismic tomography models in pacitan east java |
| topic | granitoid pacitan s-type granite tomography gravity |
| url | http://jurnal.batan.go.id/index.php/eksplorium/article/view/4954 |
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