scholarly journals STRUKTUR GEOLOGI DI PERAIRAN PULAU BUTON SELATAN

2016 ◽  
Vol 13 (3) ◽  
pp. 143
Author(s):  
Lukman Arifin ◽  
Tommy Naibaho
Keyword(s):  
Oil And Gas ◽  
Seismic Stratigraphy ◽  
Geological Structure ◽  
Geophysical Research ◽  
Geological Structures ◽  
Sea Floor ◽  
Reflection Seismic ◽  
Tectonic Processes ◽  
Geological Conditions ◽  
Active Tectonic

Penelitian geofisika dengan metode seismik pantul dangkal dilakukan di perairan Pulau Buton bagian selatan. Tujuan dari penelitian adalah untuk mengetahui kondisi geologi di bawah permukaan dasar laut. Dari data rekaman seismik diinterpretasikan bahwa stratigrafi seismik dibagi menjadi dua runtunan yaitu runtunan A dan B. Bila disebandingkan dengan geologi daratnya maka runtunan A termasuk dalam Formasi Wapulaka yang berumur Tersier dan runtunan B termasuk Formasi Sampolakosa yang berumur Kuater. Data rekaman tersebut juga menunjukkan adanya beberapa struktur geologi seperti sesar, lipatan, dan pengangkatan. Diduga struktur geologi tersebut berkembang dengan masih aktifnya proses tektonik hingga sekarang. Implikasi aktifnya tektonik ini dapat memperkaya dan meningkatkan potensi sumberdaya alam yang ada seperti migas dan aspal. Kata kunci seismik pantul dangkal, struktur geologi, tektonik, Perairan Pulau Buton. Geophysical research with shallow reflection seismic method carried out in the waters of the southern part of Buton Island. The aim of research is to determine the geological conditions under the sea floor. Data from seismic recordings interpreted that seismic stratigraphy is divided into two sequences, that are sequence A and B. Ifthe land geology to be compared then the sequence A is Wapulaka Formation which is Tertiary age and sequence B is Sampolakosa Formation which is Kuarter age. The recording data also indicated a number of geological structures such as faults, folds, and uplift. It was alleged that the geological structure is developing with tectonic processes are still active until now. The implications of the active tectonic can enrich and enhance the existing natural resources such as oil and gas, and bitumen. Keywords: shallow seismicreflection, geology structure, tectonic, Buton Island Waters.

scholarly journals The theory and application of the random dislocation directional seismic wave technique in a tunnel environment

2019 ◽  
Vol 16 (5) ◽  
pp. 939-949
Author(s):  
Yonggao Yue ◽  
Tao Jiang ◽  
Jingye Wang ◽  
Yunfeng Chao ◽  
Qi Zhou ◽  
...  
Keyword(s):  
Seismic Wave ◽  
Signal To Noise Ratio ◽  
Random Noise ◽  
Geological Structure ◽  
Detection Accuracy ◽  
Detection Distance ◽  
Geological Structures ◽  
Multiple Wave ◽  
Geological Conditions ◽  
Wave Technique

Abstract Performing exact predictions of geological conditions for tunnel construction is important for ensuring safe and quick tunnel engineering. Weak effective signals and strong random noise are the main factors that affect the distance and precision of tunnel seismic detection. Considering that directional seismic wave (DSW) technology has the ability to enhance target signals and suppress random noise, we attempt to apply this method to solve the problems of low detection accuracy and short detection distance. However, the process of data processing with the DSW technique generates false multiple wave interference (FMWI), which can lead to the misinterpretation of geological structures. This study analyses the origins of FMWI and presents the random dislocation directional seismic wave (RDDSW) method to suppress this interference. The results of a numerical simulation indicate that the FMWI is effectively suppressed and that the signal-to-noise ratio of the data is increased by approximately N times through use of the N-element RDDSW technique. In the ideal case, only spherical diffusion attenuation is considered, and the detection distance increases by approximately $\scriptstyle\sqrt N $ times. In addition, this method is also effective for signals from curved events, thereby improving the precision of the analysis of the geological structure of the tunnel. Furthermore, the field data results further verify that the RDDSW technique can significantly suppress interference and thus improve the quality of the data at little cost. Hence, the RDDSW technique has great significance for accurately predicting the geological structures of tunnels and increasing the detection distance in tunnels.

scholarly journals STRUKTUR GEOLOGI DI PERAIRAN PASANG KAYU, SULAWESI BARAT

2016 ◽  
Vol 8 (3) ◽  
pp. 119
Author(s):  
Mustafa Hanafi ◽  
Lukman Arifin
Keyword(s):  
Geological Structures ◽  
Sea Floor ◽  
Reflection Seismic ◽  
The North ◽  
Seismic Records

Daerah penelitian dicirikan oleh morfologi dasar laut yang terjal dan bergelombang dengan kedalaman bervariasi dari 40 meter di bagian timur hingga 2150 meter di bagian utara. Berdasarkan data rekaman seismik pantul dapat diidentifikasi adanya struktur geologi berupa sesar, lipatan, dan diapir. Kenampakan struktur-struktur tersebut ditandai dengan adanya lapisan yang patah, bergelombang, dan bentuk kubah. Sesar umumnya berarah timurlaut-baratdaya, dimana perkembangannya diduga sangat dipengaruhi tektonik regional terutama sesar utama Palu-Koro yang ada di daratan Pulau Sulawesi dan menerus ke laut sekitar lokasi penelitian. Kata kunci: morfologi, struktur geologi, sesar Palu-Koro, Pasangkayu The study area is characterized by the steep sea floor morphology with the depth from 40 metres in the east to 2150 metres in the north. On the basis of reflection seismic records, the geological structures such as faults, folds, and diapirs can be recognized. The appearance of such structures is signed by the faulted, wavy and domed layers. The faults in general have NE –SW direction, where it development possibly influenced by the regional Palu-Koro Fault present in Sulawesi island that continue to the study area. Keywords: morphology, geological structures, Palu –Koro Fault, Pasangkayu

scholarly journals THE MODERN GEODYNAMICS OF THE MIDDLE AND SOUTHERN PART OF CASPIAN SEA

2016 ◽  
Author(s):  
И.Э. Казымов ◽  
С.Э. Казымова
Keyword(s):  
Caspian Sea ◽  
Large Angle ◽  
Geological Structure ◽  
Geological Structures ◽  
Deep Roots ◽  
Active Tectonic ◽  
Caspian Depression ◽  
Moho Boundary ◽  
Tectonic Movements ◽  
Deep Fault Zone

Статья посвящена изучению геодинамики Азербайджанской части Среднего и Южного Каспия на базе современной изученности о геоструктуре исследуемого региона с обоснованными результатами анализа ее геологического строения, GPS данных, сейсмической активности и механизмов очагов землетрясений. Установлено, что основная масса скопления землетрясений сосредоточена в зоне псевдо-субдукции. Очаги погружаются до глубины 70 км. Большая часть землетрясений располагается ниже границы Мохо, что говорит о глубоких корнях Апшероно-Прибалханской подвижной системы. Результаты определения механизма очагов землетрясений показали, что для территории Центрально-Каспийской впадины для малых значений углов осей растяжения характерны большие углы осей сжатия, что свидетельствует о преобладании там сбросо-сдвиговых подвижек. Таким образом, можно сказать, что сейсмические процессы в зоне Апшероно-Челекенского глубинного разлома вызваны одними и теми же причинами – активными  тектоническими движениями на границе двух крупнейших структур земной коры региона – Скифско-Туранской плиты и Копетдагско-Кавказской складчатой подвижной области. The article dedicated to the study of geodynamics of the Azerbaijan part of the Middle and Southern Caspian Sea on the basis of the modern study of the geological structures of the region studied with reasonable results of the analysis of its geological structure, GPS data, seismic activity and earthquake focal mechanisms. It was found that the majority of the cluster of earthquakes concentrated in the pseudo-subduction zone. The foci of earthquakes are immersed to the depth of 70 km. Most of the earthquakes is below the Moho boundary, which indicates the deep roots of Apsheron-Balkhan moving system. The results of the mechanism of the earthquakes have shown that for the territory of Central Caspian depression for small angles of the axes of stretching values are typical large-angle compression axis, indicating that the prevalence there is strike-slip shifts. Thus, we can say that the seismic processes in the Absheron-Cheleken deep fault zone caused by the same reasons – with active tectonic movements on the border of two of the largest structures of the Earth’s crust in the region – Scyphian-Turan plate and Kopetdag-Caucasian folded movable area.

scholarly journals STRUKTUR DIAPIR BAWAH PERMUKAAN DASAR LAUT DI KAWASAN PESISIR SELATAN KABUPATEN SAMPANG-PAMEKASAN, JAWA TIMUR

2016 ◽  
Vol 5 (1) ◽  
Author(s):  
Prijantono Astjario ◽  
Lukman Arifin
Keyword(s):  
Single Channel ◽  
Geological Structure ◽  
Depositional Environments ◽  
Southern Coast ◽  
Quaternary Sediment ◽  
Geological Structures ◽  
Sea Floor ◽  
Seismic Profiling ◽  
Tertiary Sediment ◽  
Recorded Data

Penelitian seismik pantul dangkal saluran tunggal (seismic profiling) dilakukan di lepas pantai Kabupaten Sampang dan Pamekasan, pesisir selatan Madura dengan hasil rekaman sepanjang 300 km. Interpretasi data seismik dilakukan dengan cara memisahkan runtunan-runtunan yang diduga mempunyai karakter yang berbeda serta mencirikan urut-urutan pengendapan batuan sedimen. Ciri dari runtunan Kuarter ditandai dengan sedimen yang mempunyai runtunan yang tidak terganggu oleh aktivitas struktur geologi seperti perlipatan maupun pensesaran. Runtunan Tersier dicirikan dengan adanya aktivitas struktur lipatan sangat ketat seperti antiklin, sinklin, dibarengi dengan sesar-sesar, serta intrusi-intrusi diapir. Data interpretasi seismik pantul dangkal saluran tunggal memberikan gambaran tentang struktur geologi bawah dasar laut walaupun dengan penetrasi yang sangat terbatas (dangkal). Data tersebut juga memberikan gambaran serta indikasi adanya jebakan-jebakan gas bumi dan diapir di kawasan pantai Kabupaten Pemekasan dan Sampang. Kata Kunci : seismik, runtunan, diapir, Sampang dan Pamekasan Single channel seismic profiling activity carried out in the southern coast of Pamekasan and Sampang District, southern coast of Madura, has recorded data of more or less 300 kilometres. The interpretation of seismic profiling records have been done by separating the sequence of sediments which have chronologically different character and depositional environments. The characteristic of Quaternary sediment sequence is indicated by the sediment that did not disturbed by geological structures, such as folding and faulting. The Tertiary sediment sequences in the south coast of Pamekasan area have been tightly folded which consist of anticline, sincline shale diapir and faulting phenomena. The interpretation of seismic profiling data showed the indication of the geological structure under the sea floor although by means of the shallow penetration energy. It still can be helpful to indicate diapire and gas closures in the southern coast of Sampang and Pamekasan areas. Key words : seismic, sequence, diapire, Sampang and Pamekasan

scholarly journals Review of Regional Geological Structures on the Appearance of Geothermal Manifestations in the “Neck” Region of Western Sulawesi Island

2020 ◽  
Vol 331 ◽  
pp. 03003
Author(s):  
Ahmad Imam Abdullah ◽  
Riska Puspita ◽  
Harly Hamad
Keyword(s):  
Hot Springs ◽  
Neck Region ◽  
Geological Structure ◽  
Observation Data ◽  
Geological Structures ◽  
Geothermal Fluids ◽  
Geological Conditions ◽  
Close Relationship ◽  
Hydrological System ◽  
To Come

Palu-Koro fault is a major fault in western neck of Sulawesi Island. It is shown by Mw 7. 5 struck the area in 2018. Its trace can be observed by the appearance of surface ruptures. We recorded their geographic coordinates and observed the geological conditions of the surface such as structures form, properties of rocks, and physical properties of local hot springs. Then we conducted a qualitative interpretation by integrating field observation data on several References related regional geological structure of the area. From the results of the review, we suspect that there is a very close relationship between the activities of the geological structure and the appearance of several hot springs in the neck region of western Sulawesi. This is evidenced by the presence of 7 points of manifestation with the same pattern as the direction of orientation of the main fault, which is relatively north-south. However, one of requirements of the manifestation appearance on the surface is the existence of the fractures as up flow channels of geothermal fluids. Heat source is interpreted to come from intrusive igneous rocks as hot rocks conducting heat to the aquifer which heats the hydrological system around the area. We conclude that geothermal manifestations in the western neck of Sulawesi Island are tectonic geothermal related to the geological structures and not to the volcanic activity.

scholarly journals Geophysical research at the Revda intersection of the Serov-Mauk regional fault

2021 ◽  
Vol 1 ◽  
pp. 64-69
Author(s):  
Vadim A. Davydov ◽  
Keyword(s):  
Middle Urals ◽  
Geophysical Research ◽  
Geological Structures ◽  
Frequency Spectra ◽  
Radiation Fields ◽  
Longitudinal Conductivity ◽  
Geological Conditions ◽  
Characteristic Features ◽  
Tectonic Boundaries ◽  
Electrophysical Parameters

Research aim is to study the characteristic features of geophysical fields over the main geological structures in the zone of influence of the Serov-Mauk regional fault in the Middle Urals. Methodology. Electromagnetic studies included an express version of audiomagnetotelluric sounding (AMT) with a broadband OMAR-2m receiver (Institute of Geophysics UB RAS, Ekaterinburg). Office processing is based on obtaining frequency spectra of impedance using fast Fourier transform, and their transformation into deep sections of electrophysical parameters of the medium. Magnetic prospecting was carried out using GEM GSM-19T proton magnetometer (GEM Systems, Canada). Gamma-field survey was carried out with a survey radiometer SRP-68-01 (Electron, Zhovti Vody). Results. Based on observation processing results, high-quality sections of electrical resistivity and effective longitudinal conductivity were constructed on the parametric profile, as well as graphs of magnetic and radiation fields. The studies revealed features of change in the electrophysical parameters and potential fields over various geological structures of the near-contact fault zone. Summary. The signs of the main geologic features border lines were identified by changes in physical properties. The lithological and tectonic boundaries have been identified of a complex rock assemblage adjacent to the regional fault according to the characteristic anomalies of geophysical parameters. Geophysical survey results comply with the real geological conditions of the study area.

Cryogels as a solution to the issues of environmental management and trunk pipeline operation in Arctic

2020 ◽  
Vol 10 (2) ◽  
pp. 173-185
Author(s):  
Lyubov K. Altunina ◽  
◽  
Vladimir P. Burkov ◽  
Petr V. Burkov ◽  
Vitaly Y. Dudnikov ◽  
...  
Keyword(s):  
Composite Materials ◽  
Field Experiments ◽  
Oil And Gas ◽  
Soil Layer ◽  
Soil Microflora ◽  
Russian Arctic ◽  
Thaw Cycle ◽  
Trunk Pipeline ◽  
Geological Conditions ◽  
Spatial Lattice

In the Russian Arctic, a soil cryostructuring technique (i.e. strengthening of soil horizons with cryogel-based composite materials with no excavation of unstable soils required) seems to be showing promise. Experiments have proven that mechanical and thermal insulation properties attributed to cryogels make them appropriate for use in strengthening and thermally insulating the soil, while their structure makes it possible to form a stable vegetation cover. Field experiments have confirmed that cryostructuring efficiently strengthens the soil layer with cryogels stimulating soil microflora. An experience of using cryotropic compositions in the oil and gas sector was described. Notably, cryogels can be used to strengthen unstable soil foundations of trunk pipelines, as well as to bind soil (e.g. on slopes). In addition, cryogels are advised for use in engineering protection to prevent the uneven settlement of a trench base and its creep: thus, cryogels are pumped into the soil of the trench bottom base to create a support system representing a spatial lattice. After the first freeze and thaw cycle, cryotropic material is formed and then increases its strength and elasticity with each new cycle. More broadly, opportunities have been considered regarding cryogels used in various engineering and geological conditions, while taking into account the outcomes of landscape and territorial analysis. It was concluded that cryogel-based composite materials are a promising innovative scientific field expanding technological capabilities for developing and using spaces and resources in the Russian Arctic.

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