Daerah penelitian “AKS” terletak di Pulau Alor, Provinsi Nusa Tenggara Timur menyimpan potensi panas bumi di Indonesia. Potensi tersebut ditunjukkan oleh keberadaan struktur geologi sebagai pengontrol keberadaan manifestasi air panas dan didukung oleh lingkungan vulkanik. Penelitian terdahulu mengenai nilai resistivitas hasil analisis inversi 2 – D menginterpretasikan zona konduktif hingga kedalaman 1000 m, dimana interpretasi tersebut masih mempertimbangkan arah strike pengukuran. Sementara itu, analisis inversi 3 – D yang memiliki derajat kebebasan tinggi menggambarkan struktur geologi kompleks, menginterpretasikan penebalan zona konduktif hingga kedalaman 500 m. Dalam proses inversi 3 – D, dilakukan variasi nilai initial model dengan initial model 100 Ωm, initial model hasil inversi 1 – D dan initial model hasil inversi 2 – D. Hasil penelitian ini menunjukkan bahwa inversi 3 – D dengan initial model 100 Ωm menghasilkan model yang dan bersesuaian dengan kondisi geologi dan geokimia, serta mampu menggambarkan keseluruhan komponen sistem panas bumi. Zona cap rock dengan resistivitas 1 – 10 Ωm memiliki ketebalan hingga 500 m. Zona reservoar dengan resistivitas 16 – 63 Ωm berada pada kedalaman 500 m – 2.5 km serta heat source dengan resistivitas tinggi > 100 Ωm berada mulai pada kedalaman 1 km di sekitar Kawah Karitemang. Model konseptual hasil integrasi data geosains menunjukkan bahwa dugaan temperatur bawah permukaan sebesar 170 - 200 °C, upflow berupa mata air panas Kura tepat di tengah Kawah Karitemang, outflow berupa mata air hangat Karangle di sebelah selatan Kawah Karitemang dengan zona recharge berasal dari arah utara wilayah penelitian.

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The “AKS” study area, located on Alor Island, East Nusa Tenggara Province, holds significant geothermal potential in Indonesia. This potential is indicated by geological structures that control the presence of hot spring manifestations and are supported by a volcanic environment. Previous 2-D inversion studies of resistivity data interpreted a conductive zone down to 1000 m depth, with interpretations considering the strike direction of the measurements. Meanwhile, 3-D inversion analysis, which offers greater degrees of freedom in imaging complex geological structures, interpreted a thickening of the conductive zone down to 500 m depth. In the 3-D inversion process, three types of initial models were applied: a homogeneous model of 100 Ωm, a 1-D inversion result, and a 2-D inversion result. The results show that the 3-D inversion using the 100 Ωm initial model produced the most geologically and geochemically consistent subsurface model and successfully delineated all geothermal component system. The cap rock zone, with a resistivity of 1–10 Ωm, extends to a thickness of approximately 500 m. The reservoir zone, with resistivity values of 16–63 Ωm, lies between depths of 500 m and 2.5 km. The heat source, characterized by high resistivity (>100 Ωm), is interpreted to occur from depths of around 1 km near the Karitemang Crater. The conceptual model derived from the integration of geoscientific data suggests subsurface temperatures ranging from 170 °C to 200 °C, with an upflow zone represented by the Kura hot spring at the center of Karitemang Crater, an outflow zone marked by the Karangle warm spring to the south, and a recharge zone originating from the northern part of the study area.