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The Significance of the Banda Sea: Tectonic Deformation Review in Eastern Sulawesi Titu-Eki, Adept; Hall, Robert
Indonesian Journal on Geoscience Vol 7, No 3 (2020)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.7.3.291-303

Abstract

DOI:10.17014/ijog.7.3.291-303The geology of eastern Sulawesi is widely known for its complexity due to multiple deformation stages.The geology on land has been studied excessively, but little assessment has been made on the offshore geology, thus the geological evolution of the area remains a subject of controversy. A thorough observation of high multibeam bathymetry dataset offshore and SRTM dataset onshore provides an understanding on the geological features relating to the tectonic deformation. Exquisite morphological features include carbonate buildups and gravitational collapse dominating the shelf areas whereas distinct form of ridges and seamount exists in the offshore. Structural features in this area including the major Tolo Thrust and South Sula Fault varied structural lineations on land with several polygonal extensional faulting and accretionary wedge on the west of the North Banda Sea. The existence of these features may indicate that the area was majorly deformed during Neogene, specifically relating to the opening of the Banda Sea due to the subduction rollback of Banda.
The Significance of the Banda Sea: Tectonic Deformation Review in Eastern Sulawesi Titu-Eki, Adept; Hall, Robert
Indonesian Journal on Geoscience Vol 7, No 3 (2020)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (8208.226 KB) | DOI: 10.17014/ijog.7.3.291-303

Abstract

DOI:10.17014/ijog.7.3.291-303The geology of eastern Sulawesi is widely known for its complexity due to multiple deformation stages.The geology on land has been studied excessively, but little assessment has been made on the offshore geology, thus the geological evolution of the area remains a subject of controversy. A thorough observation of high multibeam bathymetry dataset offshore and SRTM dataset onshore provides an understanding on the geological features relating to the tectonic deformation. Exquisite morphological features include carbonate buildups and gravitational collapse dominating the shelf areas whereas distinct form of ridges and seamount exists in the offshore. Structural features in this area including the major Tolo Thrust and South Sula Fault varied structural lineations on land with several polygonal extensional faulting and accretionary wedge on the west of the North Banda Sea. The existence of these features may indicate that the area was majorly deformed during Neogene, specifically relating to the opening of the Banda Sea due to the subduction rollback of Banda.
The Significance of the Banda Sea: Tectonic Deformation Review in Eastern Sulawesi Adept Titu-Eki; Robert Hall
Indonesian Journal on Geoscience Vol 7, No 3 (2020)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.7.3.291-303

Abstract

DOI:10.17014/ijog.7.3.291-303The geology of eastern Sulawesi is widely known for its complexity due to multiple deformation stages.The geology on land has been studied excessively, but little assessment has been made on the offshore geology, thus the geological evolution of the area remains a subject of controversy. A thorough observation of high multibeam bathymetry dataset offshore and SRTM dataset onshore provides an understanding on the geological features relating to the tectonic deformation. Exquisite morphological features include carbonate buildups and gravitational collapse dominating the shelf areas whereas distinct form of ridges and seamount exists in the offshore. Structural features in this area including the major Tolo Thrust and South Sula Fault varied structural lineations on land with several polygonal extensional faulting and accretionary wedge on the west of the North Banda Sea. The existence of these features may indicate that the area was majorly deformed during Neogene, specifically relating to the opening of the Banda Sea due to the subduction rollback of Banda.
HIDROGEOLOGI DESA FATUMONAS DAN SEKITARNYA, AMFOANG TENGAH, KABUPATEN KUPANG Noni Banunaek; Adept Titueki
Jurnal Teknologi Vol 15 No 2 (2021): Nopember 2021
Publisher : Universitas Nusa Cendana

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (112.039 KB)

Abstract

Desa Fatumonas dan sekitarnya terdapat di Kecamatan Amfoang Tengah Kabupaten Kupang, Berdasarkan Peta Geologi Rosidi HMD, dkk 1979, terdiri dari satuan batuan Kompleks Bobonaro dan Formasi Aitutu (Tra). Berdasarkan hasil pengamatan lapangan ternyata di Desa Fatumonas dan sekitarnya pada daerah airtanah langka tidak merupakan Kompleks Bobonaro, banyak dijumpai mataair yang ekonomis. Ini membuktikan adanya kesalahan penarikan batas atau pemetaan geologi yang dilakukan pada 32 tahun lalu Penelitian ini bertujuan untuk mengetahui dan memetakan geologi detail permukaan serta memetakan hidrogeologi dan mataair di Desa Fatumonas dan sekitarnya. Metode penelitian yang digunakan meliputi melakukan kajian hasil pemetaan sebelumnya, pengambilan data citra satellite serta Pegamatan dan pemetaan dan lokasi mataair dan sumur gali. Hasil pengukuran debit mataair dan sumur gali. potensi air di daerah Fatumonas dan sekitarnya dapat hadir dalam bentuk; (1) kontak antara batugamping TRPml dan lempung TRa, dimana air keluar melalui rekahan batugamping (2) jalur sesar/patahan pada batuan gamping (TRPml) (bahkan juga di Formasi Aitutu), (3) tanah hasil pelapukan batuan sedimen TRa, dan (4) alluvium. Pengoptimalan potensi air tanah dapat dilakukan melalui pemboran atau sumur gali dangkal, sedangkan potensi mata air (spring) dapat dioptimalkan dengan membangun tampungan (reservoir) serta penjaringan pipa ke arah pemukiman.
PENERAPAN IPTEK KEPADA KELOMPOK PEMILAH MANGAN DI KABUPATEN KUPANG Yusuf Rumbino; Herry Zadrak Kotta; Fani K. Y. Serangmo; Rizhard Ndolu; Noni Banunaek; Woro Sundari; Aisyah Ahmad; Adept Talan Titu Eki; Ika Fitri Krisnasiwi; Andreas Sinuhaji
Jurnal Pengabdian Kepada Masyarakat Vol 2 No 2 (2022): Desember 2022
Publisher : Universitas Nusa Cendana

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Abstract

Masyarakat di Desa Ekateta Kecamatan Fatuleu Kabupaten Kupang. Ada yang memiliki pekerjaan sebagai pemilah batuan yang mengandung logam mmangan (Mn). Para pekerja merupakan penduduk desa yang dilibatkan oleh suatu perusahaan yang memiliki Ijin Usaha Tambang (IUP) untuk memisahkan mangan dari batuan pengikutnya dengan cara “hand sorting”. Para pekerja ini tidak dilengkapi peralatan K3 maupun fasilitas dalam memilah mangan. Jumlah pekerja tidak menentu tergantung banyaknya tumpukan mangan yang digali oleh alat berat perusahaan. Permasalahan utama dari para pekerja adalah mereka tidak dapat memilah batuan mangan yang berukuran kurang dari 2 cm karena selain lebih mudah mengumpulkan batuan mangan yang berukuran lebih besar dari 5 cm. Metode kegiatan berupa penyampaian materi mengenai teknis penambangan mangan, K3 dalam usaha pertambangan, perhitungan ekonomis yang didapatkan jika bisa mengambil mangan yang berukuran kurang dari 2 cm menggunakan alat bantu mekanis berupa trommel screen dan log washer. Dampak dari kegiatan pengabdian ini adalah menimbulkan motivasi para pemilah untuk bermitra dengan kampus dalam menghasilkan prototipe alat yang bisa digunakan sebagai pemilah mekanis untuk mendapatkan batuanpembawa mangan yang berukuran kurang dari 2 cm.
CORRELATIONS OF PHYSICAL-MECHANICAL PROPERTIES OF THE BOBONARO CLAY IN TIMOR, AND ITS IMPLICATIONS IN GEOTECHNICAL WORK: KORELASI DAN IMPLIKASI GEOTEKNIK TERHADAP SIFAT KUAT GESER LEMPUNG BOBONARO DI TIMOR Adept Titu-Eki; Nugraha K. F. Dethan
INTAN Jurnal Penelitian Tambang Vol. 6 No. 1 (2023): INTAN Jurnal Penelitian Tambang
Publisher : Jurusan Teknik Pertambangan Program Studi S1 Teknik Pertambangan Fakultas Teknik Pertambangan dan Perminyakan Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56139/intan.v6i1.172

Abstract

Many geotechnical problems like slope failures and other infrastructure damage are common in civil and mining projects on the Bobonaro Clay Complex in Timor. Obtaining relevant geotechnical data for a complete engineering analysis is often time-consuming and expensive. Therefore, a study on the relationship between the parameters can be a powerful tool in these situations. Here we used multiple linear regression analysis to determine the correlation between the physical properties (clay content and plasticity index) and mechanical properties (angle of internal friction and cohesion) of the Bobonaro Clay. The data are 53 clay samples from Kupang, East Nusa Tenggara Province. These samples were from geotechnical drilling and Atterberg tests, grain size–hydrometer analysis, and unconsolidated–undrained Triaksial tests. Of all the correlation attempts, we found that only the clay content – plasticity index, and clay content – angle of internal friction exhibited a moderate correlation with a positive trend. The results of the multiple linear regression correlation also failed to express a good model; therefore, it was replaced by simple linear regression analysis. The various factors that need to be considered in a geotechnical correlation study, along with the significance and uniqueness of the Bobonaro clay, are also addressed in this article.