KONDISI GEOLOGI DAERAH RUTENG DITAFSIR PADA DATA GAYA BERAT

Authors

  • Tatang Padmawidjaja Pusat Survei Geologi

DOI:

https://doi.org/10.33332/jgsm.geologi.v20i5.177

Abstract

Ruteng Area was occupied by the gravity anomaly values between 60 to 160 mgal, showing high anomaly between 100 to 160 mgal and basin anomaly indicated by gravity values between 60 to 100 mgal. The high anomalies are associated with a shallow or exposed basement consisting of Kiro Formation. Wuas Basin is interpreted as intermountain basin, meanwhile basins from Ruteng to the southern part are controlled by faults, and the high anomalies at the southern part is presumed to be granodiorite (Tmg). The sedimentary rocks filling the basins are Nangapanda and Bari Formations. Based on the lineament, there are some faults involving Ruteng, Ulumbu, Pocodedeng and Bajawa Faults. AB geological model of the gravity anomaly cross section shows two layer, consisting of lower layer (basement) with density of 2.71 gr/cm3, the second layer is sedimentary rocks with density of 2.6 gr/cm3. Ruteng, Ulumbu, and Pocodedeng faults controlled the swallowing magma of which can function as a heat source of the geothermal system at the studied area.


Keywords : gravity anomaly, lithology, faults, geothermal, Ruteng area.

Downloads

Download data is not yet available.

References

Bakrum Sundhoro H., Dirasutisna, S., Suryakusuma, D., Mustang, A., Situmorang T., 2003. Penyelidikan Terpadu daerah panas bumi Oka, Kab Flores Timur NTT, Subdit Panas Bumi, DIM.

Katili, J.A., and Sudradjat, A., 1989. A Short Note on the Birth of a Volcano in Flores Island, Geologi Indonesia, Majalah Ikatan Ahli Geologi Indonesai, Volume Khusus 60 Tahun Prof. DR. J.A. Katili, Hal 397 – 411.

Koesoemadinata, S., Noya, Y., Kadarisman D., 1994. Peta Geologi Lembar Ruteng, Nusa Tenggara, skala 1:250.00, Pusat Penelitian dan Pengembangan Geologi Bandung

Nasution, A., Muraoka, H., Rani, M.,Takhasima, I., Takahashi, M., Akasako, H., Matsuda K., and Badrudin, M., 2002. Geothermal prospects of Flores Island in Indonesia Viewed from their volcanism and hot water geochemistry, Bulletin of Geological Survey of Japan, vol 53 (2/3).

Padmawidjaja, T. dan. Simamora, W. H., 1993. Laporan Pemetaan Gaya berat Lembar Ruteng, Flores, Pusat Penelitian dan Pengembangan Geologi, Bandung.

Simanjuntak, J., 1985. Laporan - Studi Geofisika Tahanan Jenis Lapangan Panas bumi Ulumbu dan sekitarnya - Ruteng Kabupaten Manggarai - Flores Barat. V.S.I. Report.

Downloads

Published

2010-10-15

Issue

Vol. 20 No. 5 (2010): Jurnal Sumber Daya Geologi

Section

Article

License

Authors who publish articles in Jurnal Geologi dan Sumberdaya Mineral (JGSM.Geologi) agree to the following terms:

  1. Authors retain copyright of the article and grant the journal right of first publication with the work simultaneously licensed under a CC-BY-NC or The Creative Commons Attribution–ShareAlike License.
  2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this journal.
  3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access)