scholarly journals FAULT PATTERN AND ACTIVE DEFORMATION OF OUTER ARC RIDGE OF NORTHWEST OF SIMEULUE ISLAND, ACEH, INDONESIA

2016 ◽  
Vol 26 (1) ◽  
pp. 41 ◽  
Author(s):  
Haryadi Permana ◽  
K. Hirata
Keyword(s):  
Thrust Fault ◽  
Active Deformation ◽  
Area 3A ◽  
Deformation Processes ◽  
Dip Angle ◽  
Marine Seismic ◽  
Bathymetric Map ◽  
High Degree ◽  
Near Future ◽  
Morphological Image

New bathymetric map of northwest Simeuleu Island area (3° 01’N-4°57’N and 93°16’E-94°08’E) has evidently illustrated fine morphological image of Outer Arc ridge and Aceh Fore Arc. The structural lineament pattern, inferred from the bathymetric map, could define in general elongated major NW-SE thrust fault complex, thrust fold, or bedding trace and N-S, NNE-SSW, WNW-ESE or ENE-WSW and E-W structural lineament trend. High intensity deformation processes related to high degree obliquity subducted plate was represented by rough and sigmoidal morphological shape, landward and steep to very steep dip angle of bedding plan. Rough morphology, V to U shape valley, dissected ridge and circular shape of landslide trace are common morphology features of active deformation zone. In the near future, high resolution marine seismic will be planned across this area to capture and confirm the subsurface structure configuration and fault movement. Keyword: bathymetric map, Outer Arc ridge, thrust fault, thrust fold, bedding trace, sigmoidal morphological, V to U shape valley,and landslide. Peta batimetri baru di sebelah barat laut Pulau Simelue (3° 01’LU - 4°57’LU and 93°16’BT-94°08’BT), memperlihatkan citra morfologi yang halus pada punggungan busur luar dan busur depan Aceh. Pola kelurusan struktur mengacu pada peta batimetri, dibagi dalam komplek sesar naik yang berarah umum baratlaut - tenggara, lipatan, atau jejak perlapisan dengan kecendrungan arah struktur utara-selatan, utara timur laut – selatan barat daya, barat - barat daya, timur tenggara atau timur laut - barat daya dan timur - barat. Proses deformasi intensitas tinggi berkaitan dengan derajat kemiringan penunjaman yang tinggi, diwakili oleh bentuk morfologi sigmoid dan kasar, ke arah darat dicirikan oleh kemiringan bidang lapisan terjal hingga sangat terjal. Bentuk morfologi kasar seperti bentuk lembah V hingga U, punggungan yang terpotong dan bentuk melingkar dari jejak longsoran merupakan gambaran morfologi umum dari zona deformasi aktif. Dalam waktu dekat, seismik laut resolusi tinggi akan direncanakan memotong daerah ini untuk menggambarkan dan mengkonfirmasi konfigurasi struktur bawah permukaan dan pergerakan sesar. Kata kunci : peta batimetri, punggungan busur luar, sesar naik, lipatan, jejak bidang perlapisan, morfologi sigmoid, bentuk lembah V hingga U,dan longsoran.

scholarly journals Planning and Analysis of Sedimentation Countermeasures in Hydropower Dams Considering Properties of Reservoir Sedimentation

2018 ◽  
Vol 13 (4) ◽  
pp. 702-708 ◽  
Author(s):  
Chihaya Onda ◽  
Tetsuya Sumi ◽  
Tsuyoshi Asahi ◽  
◽  
◽  
...  
Keyword(s):  
River Flow ◽  
Reservoir Sedimentation ◽  
Sediment Properties ◽  
Sediment Removal ◽  
Postwar Reconstruction ◽  
Sediment Routing ◽  
Routing Methods ◽  
Reconstruction Period ◽  
High Degree ◽  
Near Future

Sedimentation in hydropower reservoirs is one of the most important problems facing power generation. Many of the reservoirs our company’s dams, built in the postwar reconstruction period, have been storing up sedimentation for decades. The percentage of sedimentation is now considerable, about 9%, because of a combination of a high degree of sediment production and the river flow regime. We have been trying to excavate the sedimentation from the reservoirs to avoid aggradations of upstream riverbeds and to eliminate obstacles to intake and outlet functions. Considering sediment properties, we have carried out representative five different ways of managing reservoir sediment. At the Sakuma dam, which is comparatively large, provisional transporting inside the reservoir is the main countermeasure, but radical management will be required in the near future. At the Futatsuno dam and Taki dam, which are medium-sized, the current volume of sedimentation excavation is not sufficient to maintain the size of the reservoir, due to flow sedimentation. Sediment routing methods, such as bypassing, will therefore be urgently planned. At the Setoishi and Yambara dams, the testing of sediment sluicing or hydro-suction sediment removal systems has already started. Regarding sedimentation sluicing, we have studied the feasibility of sediment bypass tunnels and gated outlets in the dam reservoir that is unsuitable for sluicing with the existing spillway. We found that gated outlet will be effective. Although there are no quick remedies that can reduce reservoir sedimentation dramatically, there are some methods that may be suitable, considering the size, life and basin of each reservoir. Not only the technical feasibility, but also the economic advantages and ecological acceptability should be considered. To sustain reservoirs and hydropower, sedimentation should be managed effectively and adaptively, based on the specific conditions of each reservoir.

Assessment of Potential Effect on Travel of Telecommuting in Singapore

1996 ◽  
Vol 1552 (1) ◽  
pp. 154-160
Author(s):  
Piotr Olszewski ◽  
Soi-Hoi Lam
Keyword(s):  
Travel Demand ◽  
Demand Management ◽  
Potential Effect ◽  
Demand Analysis ◽  
Management Tool ◽  
Travel Demand Management ◽  
Potential Reduction ◽  
Telecommunications Infrastructure ◽  
High Degree ◽  
Near Future

Recently, there has been an increased interest in telecommuting in Singapore. A survey of 630 companies indicated that although only 1.7 percent have a formal telecommuting arrangement, 3.6 percent plan to introduce it in the near future and an additional 21.6 percent would like to explore the concept. Singapore has many of the prerequisites for telecommuting to become popular: a high and growing proportion of information workers, an excellent telecommunications infrastructure, and a large installed base of personal computers. To assess the potential effects of telecommuting, a stratified travel demand analysis was performed by using travel characteristics specific to different groups of information workers. The results indicate that a considerable reduction in vehicle trips to work can be achieved if telecommuting becomes more popular. The potential reduction is up to 4.9 percent in the year 2005 and up to 11.2 percent in 2010. The corresponding savings in distance traveled are in the range of 512 000 to 1 309 000 vehicle-km. Although these predictions have a high degree of uncertainty, they indicate that telecommuting has a potential to provide significant travel reduction benefits in Singapore and should be used as a travel demand management tool.

scholarly journals STUDI AWAL POLA STRUKTUR BUSUR MUKA ACEH, SUMATRA BAGIAN UTARA (INDONESIA): Penafsiran dan Analisis Peta Batimetri

2016 ◽  
Vol 8 (3) ◽  
pp. 105
Author(s):  
Haryadi Permana ◽  
L. Handayani
Keyword(s):  
Subduction Zone ◽  
Deformation Zone ◽  
Thrust Fault ◽  
Middle Part ◽  
Strike Slip ◽  
Strike Slip Fault ◽  
Zone Structure ◽  
Structural Pattern ◽  
Active Deformation ◽  
Plate Subduction

Analisis morfostruktur daerah penelitian menunjukan tiga unit struktur geologi yang berbeda, antara lain zona penunjaman, zona deformasi aktif dan busur muka termasuk didalamnya tinggian busur muka dan cekungan busur muka. Struktur geologi zona penunjaman lempeng teramati sepanjang Palung Sunda paralel dengan zona deformasi aktif. Struktur geologi pada Tinggian Busur Muka membentuk sistim prisma akresi yang disusun oleh sesar anjak, sesar geser, perlipatan dan perlipatan naik. Pola kelurusan struktur umumnya berarah berarah utara baratlaut-selatan tenggara di sebelah utara lintang 5°U, arah baratlaut-tenggara pada posisi 3°-5°U, kelurusan kemudian berbelok hampir barat-timur di sekitar 2°-3°U. Perubahan arah pola kelurusan struktur tersebut ditafsirkan sebagai jawaban terhadap naiknya tingkat kemiringan penunjaman lempeng dari daerah Simeulue ke arah Lintang 5°U -7°U atau secara umum dari selatan Sumatra ke arah utara Sumatra. Di bagian tengah daerah telitian berkembang kelurusan patahan berarah utara-selatan yang memotong kelurusan berarah baratlaut-tenggara. Kelurusan tersebut ditafsirkan sebagai patahan geser dekstral dan kemungkinan masih aktif. Kata Kunci: Analisis morfostruktur, zona penunjaman, zona deformasi aktif, busur muka, kelurusan, sesar anjak, sesar geser, perlipatan, perlipatan naik, kemiringan penunjaman lempeng Morphostructure analyses of study area demonstrate three different units of geological structures: subduction zone, active deformation zone and fore-arc region, which include Fore Arc High and Fore Arc Basin. The plate subduction zone observes along Sunda Trench parallel with active deformation zone. Structure geology in Fore Arc High builds an accretionary prism system. It was composed by thrust fault, strike slip fault, folding and thrust fold. General trend of structural pattern is NNE-SSE at the north of 5°N, NW-SE direction at around 3°-5°N and changed in direction relative to E-W at about 2°-3°N. This direction variation of structural pattern trend was interpreted as a response to increase of obliquity degree of subducted plate from Simeulue area to 5° -7°N, or in general, from southern of Sumatra to north of Sumatra. NS trend lineament has developed in the middle part of study area that also sliced the NW-SE main structural direction. These structural lineaments interpreted as dextral strike slip fault and it is possibly still active. Keywords: morphostructure analyses, subduction zone, active deformation zone, fore-arc lineament, thrust fault, strike slip, folding, thrust fold, plat, plate subduction obliquity

Wellbore Stability of Shale below Salt Formation of Faqui Oilfield in Iraq

2014 ◽  
Vol 641-642 ◽  
pp. 451-457
Author(s):  
Fan Zhang ◽  
Yun Long Mu ◽  
Shuang Cheng ◽  
Jin Gen Deng ◽  
Bao Hua Yu ◽  
...  
Keyword(s):  
Strength Criterion ◽  
Wellbore Stability ◽  
Experimental Results ◽  
Salt Formation ◽  
Deviation Angle ◽  
Collapse Pressure ◽  
Stress Orientations ◽  
Dip Angle ◽  
High Degree ◽  
Coulomb Criterion

Serious borehole collapse has occurred in shale below salt formation of Fauqi oilfield in Iraq. The Lots of bedding shale cavings returned to ground. The strength of bedding shale cores with different bedding dip angle are tested, which changes along in a high degree with the dip angle and reach the minimum in 50°-60°. The experimental results are regressed by different strength criterion, which demonstrate that McLamore strength criterion is more accurate. The collapse pressure of shale below salt formation is calculated by Mohr-Coulomb criterion and McLamore criterion respectively. The maximum collapse pressure by Mohr-Coulomb criterion occurs in the maximum in-stress orientations and 90° deviation angle, and that by McLamore criterion occurs in the maximum in-stress orientations and 50°-60° deviation angle. By analyzing the actual drilling situation, McLamore criterion is proved to be more accurate and can be used in Fauqi oilfield.

CONTRIBUTION TO THE STUDY OF ANTHROPOMORPHISM OF HUMANOID ROBOTS

2005 ◽  
Vol 02 (03) ◽  
pp. 361-387 ◽  
Author(s):  
MIOMIR VUKOBRATOVIĆ ◽  
BRANISLAV BOROVAC ◽  
KALMAN BABKOVIĆ
Keyword(s):  
Degrees Of Freedom ◽  
Humanoid Robot ◽  
Rapid Development ◽  
Humanoid Robots ◽  
Reasonable Number ◽  
The Common ◽  
High Degree ◽  
Near Future

The rapid development of robotics has led to the appearance of very complex humanoid robots possessing already about fifty degrees of freedom. Bearing in mind that such robots will be increasingly more engaged in the close environment of humans, it is expected that the problem of "working coexistence" of man and robot sharing the common workspace will become acute in the near future. Since no significant rearrangement of the human's environment because of the presence of robots can be expected, robots will have to further "adapt" to the environment previously dedicated only to humans. This paper raises some new fundamental questions concerning the necessary degree of anthropomorphism of humanoid robots. What is particularly challenging is how to achieve a sufficiently high degree of anthropomorphism with a reasonable number of degrees of freedom. Using the example of a humanoid robot, concrete measures are proposed as to how to attain the desired degree of its anthropomorphism.

scholarly journals Early gold-bearing quartz veins within the Rivière-Héva fault zone, Abitibi subprovince, Quebec, Canada

2018 ◽  
Vol 55 (10) ◽  
pp. 1139-1157 ◽  
Author(s):  
Francis Guay ◽  
Pierre Pilote ◽  
Réal Daigneault ◽  
Vicki McNicoll
Keyword(s):  
Fault Zone ◽  
Thrust Fault ◽  
Fault Zones ◽  
Ductile Deformation ◽  
Vein System ◽  
Quartz Veins ◽  
Abitibi Subprovince ◽  
Major Fault ◽  
High Degree ◽  
Gold Bearing

The Malartic Lakeshore showing is a gold-bearing quartz vein system located within the major Rivière-Héva fault zone (RHFZ) of the southern Abitibi greenstone belt. This fault separates the 2702–2700 Ma felsic Héva Formation from the 2708 Ma mafic-ultramafic Dubuisson Formation. A swarm of thin diorite dykes with lamprophyric facies and gold-bearing quartz veins are present only on the Dubuisson side of the fault. The 30–70 cm thick gold quartz veins are boudinaged and folded. Veins are banded and associated with pyrite, chalcopyrite, galena, barite, and gold. The study area is characterized by a high degree of ductile deformation associated with the RHFZ and manifested by the southeast-trending “principal schistosity” (Sp). Stretching lineations plunge moderately to shallowly toward the southeast as a result of shortening followed by late directional shearing during a transpressive deformation. A sample from the Héva Formation yielded a zircon U–Pb age of 2698.2 ± 0.8 Ma, and a diorite dyke produced an age of 2694.3 ± 2.5 Ma. Quartz veins are crosscut by dykes, and both are affected by the Sp fabric, indicating an early emplacement with respect to the deformation. This situation contrasts with the orogenic gold veins found in association with major fault zones. A near-synvolcanic magmatic hydrothermal origin is proposed for this gold vein system. Because all subvertical units in the area are south facing, the presence of the older Dubuisson Formation over the younger Héva Formation is attributed to the RHFZ acting as a significant reverse or thrust fault.

scholarly journals Structural evolution of continental and marine Permian rock salt of the North German Basin: constraints from microfabrics, geochemistry and U–Pb ages

2020 ◽  
Vol 109 (7) ◽  
pp. 2369-2387
Author(s):  
Mareike Henneberg ◽  
Jolien Linckens ◽  
Michael Schramm ◽  
Jörg Hammer ◽  
Axel Gerdes ◽  
...  
Keyword(s):  
Rock Salt ◽  
Boundary Migration ◽  
Structural Evolution ◽  
Active Deformation ◽  
The North ◽  
Subgrain Rotation ◽  
Fabric Evolution ◽  
Deformation Processes ◽  
Intense Deformation ◽  
Permian Salt

Abstract Analyzing the dynamics of microstructural response on natural deformation in rock salt, we present microfabric, EBSD, geochemical and U–Pb data, obtained from Permian salt formations of the Kiel-Honigsee salt wall in Northern Germany. The samples were recovered from deep drillings, which penetrated through an overturned rock salt sequence of both Rotliegend and Zechstein deposits. The bromide concentration in halite indicates a continental and marine origin for the Rotliegend and Zechstein deposits, respectively. Despite intense deformation, relics of early diagenetic fabrics are still preserved. Deformation of the impure Rotliegend rock salt was accommodated by pressure solution and hydrofracturing as is indicated by the microfabrics and bromide concentration in halite. Fractures in siliciclastic domains were filled with fibrous halite and deformed by subgrain rotation recrystallization (SGR). Fluid-rich Zechstein rock salt, on the other hand, was deformed by formation of subgrains and grain boundary migration (GBM). The distribution of mineral phases and fluids had a significant impact on the fabric evolution and on strain localization. U–Pb dating of carbonate phases of the Rotliegend sequence yielded Permian depositional ages and Jurassic to Cretaceous deformation ages, the latter related to diapiric ascent. The combination of results traces a dynamic evolution of the rock fabric inside the diapir structure driven by locally active deformation processes that can be correlated with early stages of halite deposition and diagenesis and syntectonic fabric reorganization related to diapirism in an extensional setting.

scholarly journals Smart Sensors Applications for a New Paradigm of a Production Line

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 650 ◽  
Author(s):  
Marina Indri ◽  
Luca Lachello ◽  
Ivan Lazzero ◽  
Fiorella Sibona ◽  
Stefano Trapani
Keyword(s):  
Production Line ◽  
Automated Guided Vehicles ◽  
Smart Manufacturing ◽  
New Paradigm ◽  
Production Lines ◽  
Industrial Plants ◽  
Multiple Sensors ◽  
High Degree ◽  
Robotic Architecture ◽  
Near Future

Industrial plants are going to face a deep renewing process within the Industry 4.0 scenario. New paradigms of production lines are foreseen in the very near future, characterized by a strict collaboration between humans and robots and by a high degree of flexibility. Such envisaged improvements will require the smart use of proper sensors at very different levels. This paper investigates three different aspects of this industrial renewing process, based on three different ways of exploiting sensors, toward a new paradigm of a production line. The provided contributions, offering various types of innovation and integration, are relative to: (i) a virtual sensor approach for manual guidance, increasing the potentialities of a standard industrial manipulator, (ii) a smart manufacturing solution to assist the operator’s activity in manual assembly stations, through an original exploitation of multiple sensors, and (iii) the development of an advanced robotic architecture for a flexible production line, in which a team of autonomous mobile robots acts as a meta-sensor net supporting traditional automated guided vehicles. Accurate analyses of existing state-of-the-art solutions compared with the proposed ones are offered for the considered issues.

Array length magnification through the use of multiple sources and receiving arrays

Geophysics ◽  
1982 ◽  
Vol 47 (3) ◽  
pp. 311-315 ◽  
Author(s):  
P. Buhl ◽  
J. B. Diebold ◽  
P. L. Stoffa
Keyword(s):  
Multiple Sources ◽  
Wide Aperture ◽  
Total Length ◽  
Common Depth Point ◽  
Marine Seismic ◽  
Near Future

For wide aperture seismic experiments, very long effective arrays can be synthesized by using multiple sources and receiving arrays. In marine seismic work where a source is coincident with the end of each array, the total length of the arrays can be multiplied by a factor between [Formula: see text] and n, where n is the number of sources. Three ships, each with a source and 3.6-km array, can be positioned so that the offset range 0 to 25.2 km can be continuously sampled with duplication only in the 0 to 3.6-km range. With 100-m group spacing these data can be gathered into 252-fold common‐depth‐point (CDP) data with a CDP spacing of 150 m. While it is not likely that we will ever see five or six ships steaming in line, two and three ships will be used in the near future for detailed sedimentary and deep crustal studies.

Magmatic stock emplacement and its constraints on the localization of related skarn orebodies: an example from the Tongguanshan stock, Tongling district, eastern China

2021 ◽  
pp. 1-16
Author(s):  
Hongsheng Liu ◽  
Liangming Liu ◽  
Wei Cao ◽  
Yan Chen ◽  
Michel Faure
Keyword(s):  
Contact Surface ◽  
Eastern China ◽  
Three Dimensional ◽  
Target Area ◽  
Magma Pulses ◽  
Western Side ◽  
Dip Angle ◽  
Magnetic Lineations ◽  
High Degree ◽  
Magnetic Foliation

Abstract Study of constraints of stock emplacement and geometry on associated skarn orebodies is significant for the understanding of the epithermal deposit system. We have chosen the typical Tongguanshan skarn ore deposit (eastern China) as our target area. The Tongguanshan stock was emplaced at the NE–SW-striking Tongguanshan anticline and is characterized by macroscopically homogeneous quartz–monzodiorite. The magnetic parameters show that the stock is dominated by oblate magnetic ellipsoids and a high degree of anisotropy (> 1.1), and this value is higher at the stock margin. The strike of magnetic foliation at the stock margin is parallel to the stock boundary with sub-horizontal magnetic lineations. A vertical NE–SW-striking magnetic foliation, which is parallel to the regional structures, is revealed inside the stock. The three-dimensional geometric modelling shows that the stock has a tongue-like geometry and the contact surface in both eastern and western sides dips to the NW, but the western side is steeper. Nevertheless, the orebodies are almost developed at the eastern side. Accordingly, we propose that the Tongguanshan stock was constructed by multiple magma pulses, initiated at the SW part of the stock, and ascended along inherited NE–SW extended fractures in the Tongguanshan anticline. The successive magma pulses either accreted by a unilateral E-wards trend or by bilateral magma accretion, which resulted in a deformation difference in the contact zone and caused uneven orebody development. Our study also shows that the strike, dip angle and curvature situation of contact surface, which affects the water–rock reaction process and distribution of the dilation zone, are important ore-controlling factors.

Sign in / Sign up

Export Citation Format

Share Document