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ALTERASI DAN MINERALISASI ENDAPAN EMAS TIPE EPITHERMAL DAERAH POLONGGO-HULUBALANG KABUPATEN BUOL PROPINSI SULAWESI TENGAH Hamad, Harly
Geotadulako Vol 1, No 2 (2013): Juli-Desember
Publisher : Geotadulako

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Daerah Polonggo-Hulubalang secara administratif termasuk dalam wilayah Kecamatan Paleleh dan Paleleh Barat, merupakan daerah prospek penambangan emas yang telah ditambang oleh masyarakat setempat dengan cara penambangan tradisional. Tulisan ini bertujuan untuk menjelaskan tentang mineralisasi endapan emas dari segi cara terbentuk dan proses terbentuknya. Proses pembentukan mineralisasi endapan emas sangat tergantung dari alterasi mineral dan tipe mineralisasinya. Berdasarkan atas hasil pengamatan mikroskopis batuan dan kandungan unsur-unsur dalam batuan (Metode AAS) diperoleh kumpulan mineral berupa kuarsa, lempung, silika, klorit, epidot, pyrite, sedikit karbonat, zeolit, serisit dan feldspar. menunjukkan jenis alterasi yang berkembang terutama dalam bentuk argilitisasi, silisifikasi, propilitisasi serta sebagian lainnya dalam bentuk serisitisasi. Cebakan mineralisasi logam sulfida pada daerah Polonggo-Hulubalang dijumpai dalam bentuk urat-urat silika (quartz veins), urat-urat silika berukuran halus hingga sangat halus (veinlet-microveinlet) yang kadang memperlihatkan struktur menganyam (veinlet stocwork), setempat dalam bentuk hamburan (disseminated) dan terbreksikan (hydrothermal breccia). Berdasarkan pada kumpulan mineralisasi dan bentuk-bentuk cebakan tersebut, maka tipe endapan mineralisasi logam sulfida pada lokasi Prospek Polonggo-Hulubalang dapat dikategorikan sebagai endapan Epithermal Low Sulphidation, dimana kehadiran zona stockwork dan zona hydrothermal breccia merupakan bagian dari sistem epithermal ini

Pemodelan Struktur Perlapisan Bawah Permukaan Untuk Penentuan Bidang Gelincir Pada Daerah Rawan Longsor. (Studi Kasus Ruas Jalan Nasional 005 Lakuan â€“ Laulalang Dan Ruas 006 Laulalang-Lingadan) Hamad, Harly; Yunus, Ruslan Moh
JOURNAL TEKNIK SIPIL DAN INFRASTRUKTUR Vol 7, No 1 (2017)
Publisher : Jurusan Teknik Sipil Universitas Tadulako

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Characteristics of roads in Central Sulawesi at some point are an area of frequent landslides. The road segment in question, including the section 005 and section 006 which is a national road linking the province of Central Sulawesi and Gorontalo province. The link conditions that have often suffered landslides have disrupted access to transport and causing high transportation costs. This study aims to determine the geometry of the sliding plane at KM 509 and KM 513 using the method of geoelectric resistivity Wenner configuration with a path length measurement of 300 m and 5 m electrode spacing. The results of the study at two locations and modeling shows the layering structure resistivity value of which is at 100 â„¦m - 300 â„¦m and modeling results ofÂ 2-D geoelectric cross-section shows the sliding plane ground motion varies between 5 to 15 m. Value of resistance and sectional sliding obtained indicate that the location is vulnerable to landslides, and requires a comprehensive treatment to prevent landslides.

KONDISI HIDRODINAMIKA DAN OCEANOGRAFI TELUK TOMINI PROPINSI SULAWESI TENGAH Hamad, Harly
MEKTEK Vol 10, No 1 (2008)
Publisher : MEKTEK

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This research aims to predict wave length, velocity, energy and fluks energy of wave, longshore current,tidal wave at shoreline beach of gulf tomini. The wave caused by wind can be predicting by wilson formula.Orientation of wave from north (58%) and from NW (47%) caused by the wind that happen in august todecember with velocity 9,3 â€“ 10,9 m/s. Another parameters of wave i.e : High wave ranging from 1,59 m to2,02 m, wave length between 42 m and 51 m, their period is 5,17 S â€“ 5,71 S. Longshore current = 0,074 m/swith 1,7259 m high of wave at breaker zone in 2,213 m deep. This value contribute to ratio (h/H) is 1,282.According velocity wave give fluks energy 3773 to 6038 Joule/m2. Influks sediment in beach 3,04 to 6,43m3/hour.

Studi Geologi Gunung Colo Menggunakan Digital Elevation Model (DEM) Pulau Una-Una Sulawesi Tengah Muslimin U Botjing; Herry Djainal; Sukardan U Tawil; Harly Hamad Asrafil; Bayu U Firmanto
DINTEK Vol 14 No 1 (2021): Vol. XIV No. 1 Maret 2021
Publisher : Fakultas Teknik UMMU

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Kajian memperoleh gambaran umum kondisi Gunung Colo dengan mengunakan pengindraan jauh, diantaranya dengan menggunakan analisis citra DEM yang menunjukkan kenampakan lokasi penelitian secara 3 dimensi disertai dengan elevasinya, selain itu pula, dengan cara menarik kemungkinan pola kelurusan yang ada sebanyak mungkin, untuk mengetahui arah gaya pembentukan kelurusan akan mempermudah interpretasi struktur geologi Lokasi Pulau Una-Una di tengah Lengan Sulawesi, Teluk Tomini dan keterdapatan dari Gunung Colo yang merupakan gunungapi soliter karena posisi Gunung Colo di luar dari rangkaian Jalur Gunungapi Indonesia. Kenampakan panas bumi merupakan rembesan solfatara/fumarola terdapat di puncak Gunung Colo. Bentuk morfologi, kawahnya terbuka ke arah timurlaut, letaknya hampir di tengah pulau, dengan lingkaran utara-selatan sepanjang 1.350 m dan timur - barat sepanjang 1.750 m. Informasi dari kegiatan ini terkait gunung colo yang relevan dengan kondisi geologi daerah gunungapi colo bagi berbagai pihak yang ingin mengkaji daerah tersebut. Dari penelitian ini juga diharapkan dapat diperoleh bahan referensi yang aktual melaui studi kasus bagi pembelajaran matakuliah geologi terkait geomorfologi, vulkanologi dan geotermal serta bencana geologi.

Karakteristik Batuan Marmer pada Daerah Kelei Kabupaten Poso Sulawesi Tengah Muslimin U. Botjing; Nurhikmah Supardi; Harly Hamad; Irfaldi Ikhsan; Herry Djainal M.Si
DINTEK Vol 15 No 1 (2022): V0l. 15 No. 01 Maret 2022
Publisher : Fakultas Teknik UMMU

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Keterdapatan marmer di Desa Kelei Kecamatan Pamona Utara sangat berpotensi. Namunhingga kini belum ada penelitian yang mengkhususkan pada karateristik dari keberadaan marmer di daerah tersebut. Marmer daerah penelitian berwarna abu abu berwarna abu-abu, struktur nonfoliasi, tekstur crystalline, komposisi mineral yaitu mineral kalsit, kuarsa, muskovit dan mineral opak. Berdasarkan analisis petrografi pada tujuh sayatan tipis marmer menunjukkan tekstur kristaloblastik (berdasarkan ketahanan proses metamorfisme), tekstur granoblastik (berdasarkan bentuk mineral), dan tekstur khusus batuan metamorf yaitu saccharoidal.Sifat keteknikan marmer memberikan nilai yang bervariasi dengan kuat tekan dari suatu batuan marmer serta ketahanan terhadap keausan dari suatu batuan marmer. Terlihat bahwa nilai kuat tekan rata – rata yang dimiliki oleh marmer pada daerah penelitian adalah sebesar 60.64 kg/cm2, dengan nilai keausan agregat 24.13%. Berdasarkan sifat fisik dan karakteristik dari batuan marmer dapat digunakan sebagai bahan bangunan yang dapat dimanfaatkan dalam industri bahan galian

ANALISA KINEMATIK SESAR PALU-KORO SEGMEN PALU DAERAH WISOLO HINGGA WERA KABUPATEN SIGI PROVINSI SULAWESI TENGAH Harly Hamad
Jurnal Sains dan Teknologi Tadulako Vol 7 No 1 (2021): April 2021
Publisher : Universitas Tadulako

The Sulawesi Island is composed of a complex tectonic arrangement, one of the reasons for the complexity of the tectonic arrangement in Central Sulawesi, namely the presence of the Palu-Koro Fault (Bellier, et al. 2001). This research discussed the tectonic evolution and kinematics of the Palu Koro fault in the Palu segment from Wisolo to Wera, Sigi District, Central Sulawesi Province and its surroundings, to describe the succession of paleostress fields, 150 striations in the fault plane were measured in 5 paths of the measurement location. The stress inversion method developed by Delvaux and Sperner (2003) used in analyzing the stress regime to determine the evolution of stresses that developed in the research area using the Win Tensor 5.0.1 application. The results of rock deformation stress inversion analysis shows the order of 4 orientations of the elongation axis, namely in the first phase with the Southwest – Northeast orientation, the second phase with the South – North orientation, the third phase with the North West – South Southeast orientation, and finally the fourth phase with the Northwest – Southeast orientation. Based on the results of the reconstruction, the Palu-Koro Fault in the Palu segment from the Wisolo to Wera area was formed in the first phase with a downward or oblique movement on the Southwest – Northeast elongation axis and the Northwest – Southeast stress orientation with the stress regime type, namely strike slip

STUDI HIDROGEOLOGI TERHADAP KAPASITAS DEBIT AIR TANAH MENGGUNAKAN METODE PUMPING TEST PADA DAERAH BIROMARU KABUPATEN SIGI Harly Hamad
Jurnal Sains dan Teknologi Tadulako Vol 7 No 2 (2021): Agustus 2021
Publisher : Pascasarjana Universitas Tadulako

Groundwater is a natural resource that can be renewed naturally, but the time of renewal is very relative. In meeting the needs of groundwater in the community, it is necessary to strive for groundwater produced can be periodically available. The purpose of this study was to aquifer condition and determine the capacity for groundwater discharge in the Biromaru area, precisely in Lolu Village. The data collection method used is the pumping test long-term test method and the analytical method used is the Neuman curve-fitting method and Theis recovery method. Based on the test and aquifer test results of lithological correlation, value of transmissivity 180,001 m2/day, storativity 3,7 x 10-3, specific yield 2,56 x 10-2, hydraulic conductivity 14,572, permeability 16,488. The potential for groundwater discharge in the study area is between 226,067 cm3/day. The maximum available discharge is 146.88 m3/day, while the groundwater discharge that has been exploited from production wells in the research area is ≥363,461.28 m3 which has been used for ±52 weeks so that the pumping discharge does not exceed the potential groundwater discharge.

STUDI HIDROGEOLOGI TERHADAP KAPASITAS DEBIT AIR TANAH MENGGUNAKAN METODE PUMPING TEST PADA DAERAH BIROMARU KABUPATEN SIGI Harly Hamad
Jurnal Sains dan Teknologi Tadulako Vol 7 No 2 (2021): Agustus 2021
Publisher : Universitas Tadulako

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Groundwater is a natural resource that can be renewed naturally, but the time of renewal is very relative. In meeting the needs of groundwater in the community, it is necessary to strive for groundwater produced can be periodically available. The purpose of this study was to aquifer condition and determine the capacity for groundwater discharge in the Biromaru area, precisely in Lolu Village. The data collection method used is the pumping test long-term test method and the analytical method used is the Neuman curve-fitting method and Theis recovery method. Based on the test and aquifer test results of lithological correlation, value of transmissivity 180,001 m2/day, storativity 3,7 x 10-3, specific yield 2,56 x 10-2, hydraulic conductivity 14,572, permeability 16,488. The potential for groundwater discharge in the study area is between 226,067 cm3/day. The maximum available discharge is 146.88 m3/day, while the groundwater discharge that has been exploited from production wells in the research area is ≥363,461.28 m3 which has been used for ±52 weeks so that the pumping discharge does not exceed the potential groundwater discharge.

Optimization of Groundwater Well Discharge Capacity Using Step Drawdown Test Post-Earthquake in Biromaru, Sigi District, Central Sulawesi Hamad, Harly; Aswadi, Muhammad; Lapalani, Cindy Ziqni Noviar
Jambura Geoscience Review Vol 7, No 2 (2025): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v7i2.27807

The effectiveness of groundwater wells in tectonically active regions remains insufficiently understood due to the lack of integrative hydrogeological evaluations. This study aims to characterize the hydraulic performance of five groundwater wells in Biromaru District, Sigi Regency, an area affected by the 2018 Central Sulawesi earthquake. A combination of the Neuman method and the Hantush-Bierschenk approach was employed to evaluate key aquifer parameters, including transmissivity, storativity, specific yield, and well loss coefficients. Step drawdown tests and time-drawdown data were analyzed to determine aquifer responses under controlled pumping conditions. The results show a clear variation in transmissivity and storativity among wells, indicating heterogeneous subsurface characteristics possibly influenced by post-seismic compaction. Wells 1 and 3 demonstrated high transmissivity and efficiency, supported by C values below 0.5, signifying well integrity and optimal construction. Conversely, well 2 exhibited low hydraulic performance, suggesting lithological constraints or structural deficiencies. The combination of analytical methods provided a robust framework for interpreting aquifer-well interactions in a post-disturbance setting. This study contributes to a deeper understanding of groundwater behavior in seismically disturbed regions and emphasizes the importance of incorporating multi-method approaches in hydrogeological assessments. The findings can serve as a reference for groundwater resource planning, well rehabilitation, and adaptive water management in vulnerable areas like Sigi Regency.

Provenance Determination Of Sandstone Based On Petrographic Analysis In Bambaira And Ako Areas, Pasangkayu District, West Sulawesi Province Noviar Lapalani, Cindy Ziqni; Hamad, Harly; Fitriana, Tati
Jambura Geoscience Review Vol 7, No 1 (2025): Jambura Geoscience Review (JGEOSREV)
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jgeosrev.v7i1.27244

West Sulawesi has a very connections with the tectonic process of the Makassar Strait, where the Makassar Strait is influenced by the process of plate expansion, as a result of the process formed a sedimentary basin composed of sedimentary rocks with rocks of diverse origin, the determination of rock origin (provenance) can help to reveal the tectonic setting and rock origin in the, to see the mineral content of existing sandstone constituents in the research area microscopically, the parameters used in determining the origin of rocks are quartz, feldspar and lithic fragments, the calculation of rock constituent minerals using the point counting method and then normalized for plotting on the provenance diagram and tectonic setting. The results of petrographic analysis on sandstone obtained the name of the Rock is lithic graywacke and quartz wacke. Rocks of origin in the research area are from Plutonic igneous rocks, volcanic igneous rocks, metamorphic rocks and sedimentary rocks, which are known based on the presence of monocrystalline quartz and polycstaline Quartz minerals, orthoclase minerals, sanidine minerals, volcanic lithic and sedimentary lithic,while the tectonic setting in the research area is magmatic arc and recycle orogen.

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