Update Artikelilmiah: 11429

ABDUL HAKIM PRIMA YUNIARTO

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Abstrak (Bhs. Indonesia)

Penelitian geofisika dengan metode Time Domain Induced Polarization di blok “X” Gunung Pongkor Kabupaten Bogor Jawa Barat telah dilakukan. Penelitian ini bertujuan untuk mengidentifikasi zona mineralisasi emas di daerah tersebut. Setelah akuisisi data maka dilakukan pengolahan data yang meliputi perhitungan resistivitas dan chargeabilitas hingga diperoleh penampang 2D nilai true resistivitas dan true chargeabilitas daerah penelitian. Pemodelan dilakukan menggunakan software Res2Dinv yang kemudian diinput ke dalam software Surfer 10. Berdasarkan distribusi nilai resistivitas dan chargeabilitas pada penampang 2D menunjukkan bahwa bahwa tidak setiap line terdapat zona mineralisasi emas. Pada line IP-1 tidak terdapat zona mineralisasi emas tetapi hanya terdapat zona alterasi argilik. Zona mineralisasi emas hanya ditemukan pada line IP-2 hingga line IP-5, dimana zona mineralisasi emas berawal dari line IP-2 dan berlanjut hingga line IP-4, kemudian bercabang menjadi 2 pada saat di line IP-5 pada kedalaman rata-rata 50 meter dari permukaan tanah dengan ketebalan 50 meter pada satuan batuan andesit. Keberadaan zona mineralisasi emas ditandai dengan adanya nilai high resistivitas dan high chargeabilitas. Sedangkan pada daerah dengan nilai low resistivitas dan high chargeabilitas merupakan zona alterasi argilik. Satuan batuan yang menyusun bawah permukaan daerah penelitian adalah berupa top soil, tuff dan andesit.

Abtrak (Bhs. Inggris)

Geophysical research with Time Domain Induced Polarization method in block "X" Pongkor Mountain Bogor Regency of West Java has been done. This study aims to interpret the zones of gold mineralization in the area. After data acquisition, then data processing have been carried out which includes the calculation of the resistivity and chargeability to obtain a 2D cross section of true resistivity and true chargeability areas of research. Modeling was performed using the software Res2Dinv which then extracted in the format Surfer 10. Based on the distribution of resistivity and chargeability values on 2D cross section shows that were not every line there are zones of gold mineralization. In line IP-1 there are not zones of gold mineralization but only argillic alteration zone. Zones of gold mineralization was found only in line 2 to line IP-5, where the gold mineralized zone starts from the line of IP-2 and continued until the line IP-4, then branched into two part in line IP-5 at an average depth 50 meters from the ground with a thickness of 50 meters on andesit rock formation. The existence of the gold mineralized zone is characterized by high resistivity and high chargeability. Whereas in areas with low resistivity and high value chargeability is argillic alteration zone. Rock units that make up the bottom surface area of research is in the form of top soil, tuff and andesite.

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