Pemodelan Sebaran Sistem Hidrotermal dan Identifikasi Jenis Batuannya dengan Metode CSAMT (Studi Kasus Gunungapi Ungaran)
Abstract: The investigation of
the hydrothermal system distribution and identification of its rock type has
been done by CSAMT method at Ungaran Volcano area. The acquisition data has
been done around 750 m x 100 m area with 4 lines at N750E direction. Sounding
site distanced 250 m, whereas the data was measured by Stratagem model 26716-01
Rev.D. Processing of the data was started by 1-D inversion of Robust method.
The 1-D results were then used as the input of MT2D software. The results
showed that subsurface resistivity were 8.6 to 46.4 Ωm estimated as
hydrothermal system, 55.8 to 102.6 Ωm estimated as aquifer zone or permeable
saturated zone, 145.3 to 495.7 Ωm estimated as pra-caldera rock associated with
vapor dominated zone, and 1420.5 to 15.083 Ωm estimated as lava pile associated
with basaltic and andesitic rock. The most prospective hydrothermal system area
existed at all along line 4 on 30 to 140 mdepth.
Penulis: Arif Ismul Hadi,
Kirbani Sri Brotopuspito dan Wahyudi
Kode Jurnal: jpfisikadd090072
