Anomali Geomagnet; Kaitannya dengan Zone Mineralisasi di Daerah Malingping, Bayah dan Sekitarnya, Kabupaten Lebak, Propinsi Banten

Authors

  • W.H Simamora

DOI:

https://doi.org/10.33332/jgsm.geologi.v16i5.371

Abstract

Magnetic anomaly in the Malingping - Bayah and surrounding areas, ranging from -650 nT to +270 nT, can be divided into three groups. The first group is the low anomaly with a value range from -650 nT to -250 nT, the second group is middle anomaly with a value range from -250 nT to + 50 nT, and the third group is high anomaly with a value range from + 50 nT to +270 nT. Low anomaly zone is thought to be the effect of intrution of acid rocks which is located in 500 to 2000 m depth. This is supported by the existing of granodiorite intrusion of Cihara (Tomg) that also coincides with low anomaly zone. The granodiorite intrusion is thougt to have played an important role in sulfide, gold (Au), and silver (Ag) mineralization which is found in the Cikotok and Cirotan areas.

 

Keywords : Geomagnetic anomalies, Malingping, granodiorite of Cihara

 

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References

Djamal, B., Hasan, R.S., Sumanang, Hartono,U., 2005, Laporan Geologi Daerah Bayah dan Sekitarnya, Kabupaten Lebak Propinsi Banten. Laporan Teknis tidak diterbitkan, Pusat Penelitian dan Pengembangan Geologi.

Golden Software, 2002, Surfer Mapping System, Golden, Colorado.

Hamilton, W., 1979, Tectonics of the Indonesian Region, US Government Printing Office, Washington, 69.p

Hunt, C.P., Moskowitz, B.M., Benerjee, 1995, Magnetic properties of rocks andmineral. In: Ahrens, T (ed), Rock Physics and Phase Relation, Handbook of Physical Constant. American Geophysical Union, pp 189-203.

Katili, J.A., 1989, Evolution of the Southeast Asian Arc Complex, Geol. Indon., Vol. 12, No. 1, Jakarta, p. 119.

Sujatmiko dan Santosa, S., 1992, Peta Geologi Lembar Leuwidamar, Jawa, skala 1 ; 100.000, Pusat Penelitian dan Pengembangan Geologi, Bandung.

Suparka, S., 1980, Batuan Intrusi Cihara dalam hubunganya dengan Mineralisasi Sulfida di Daerah Banten Selatan Jawa Barat, Proyek Penelitian dan Pengembangan Sumber Daya mineral dan Air. Sub Proyek Sumber Daya Mineral Logam Dasar. NO. 08/LGPN/80.

Tatis, R., Badri. A. S., Sangadji, H. G., 1968, Ekplorasi, Penambangan dan Pengolahan Biidjih Emas pada PN. Aneka Tambang Unit Pertambangan Emas Tjikotok Banten Selatan Djawa Barat. Laporan Kerdja Praktek AGP.

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