2-D Density and Directional Analysis of Fault Systems in the Zagros Region (Iran) on a Regional Scale

2018 ◽  
Vol 175 (8) ◽  
pp. 2753-2768 ◽  
Author(s):  
Seyed Naser Hashemi ◽  
Chavare Baizidi
Keyword(s):  
Regional Scale ◽  
Fault Systems ◽  
Directional Analysis ◽  
Zagros Region

Directional Analysis of Urban Expansion Based on Sub-pixel and Regional Scale: A Case Study of Main Districts in Guangzhou, China

2019 ◽  
Vol 29 (4) ◽  
pp. 652-666
Author(s):  
Yi Zhao ◽  
Kaiwen Zhong ◽  
Jianhui Xu ◽  
Caige Sun ◽  
Yunpeng Wang
Keyword(s):  
Urban Expansion ◽  
Regional Scale ◽  
Directional Analysis

scholarly journals Submarine Active Faults and Morpho-Tectonics Around the Iberian Margins: Seismic and Tsunamis Hazards

2021 ◽  
Vol 9 ◽  
Author(s):  
Luis Somoza ◽  
Teresa Medialdea ◽  
Pedro Terrinha ◽  
Adrià Ramos ◽  
Juan-Tomás Vázquez
Keyword(s):  
High Resolution ◽  
Pure Shear ◽  
Regional Scale ◽  
Active Faults ◽  
Plate Boundary ◽  
Active Tectonics ◽  
Shear Zones ◽  
Strain Partitioning ◽  
Fault Systems ◽  
Iberian Margin

The aim of this work is to make a synthesis at regional scale focused on the geophysical characterization of submarine faults around the Iberian margin to identify active structures and analyze their development in the framework of the present plate organization. Most of these submarine faults show seabed morphological expressions mapped with high-resolution swath bathymetry data, high-resolution parametric sub-bottom profiles and multichannel seismic profiles. Present active tectonics, deformation, seismicity, and tsunami-affected coastal areas is mainly focused on south Iberia at the Eurasian and Nubia plate boundary. Submarine active faults in these areas are represented by long strike-slip fault systems and arcuate fold-thrust systems. Their development takes place in response to present NW-SE convergence between the Eurasian and Nubia plates. We propose a strain partitioning model of the plate boundary into simple and pure shear zones to explain the distribution and mechanisms of active submarine faults along the Gulf of Cádiz, Gibraltar Arc and Alborán Sea in response to the present-day shear stress orientation. Nevertheless, deformation is also focused in the NW Iberian margin. Thus, along the Galician and Portuguese margin, several submarine faults mapped as thrust fault systems with high-seismic activity along the Iberian ocean-continent transition reflect the re-activation of former structures. We suggest that submarine active faults in the NW and W Iberia are also the response to the eastwards transfer of short-offset transform faults of the Mid Atlantic Ridge into the oceanic Iberian along a weakness as the former plate boundary between the oceanic Iberia and Eurasia domains. The distribution and activity of submarine faults mapped in this work from geophysical and bathymetric data are in good agreement with geodetic data and focal mechanisms.

Hypogeal geological survey in the “Grotta del Re Tiberio” natural cave (Apennines, Italy): a valid tool for reconstructing the structural setting

2011 ◽  
Vol 3 (2) ◽  
Author(s):  
Alice Ghiselli ◽  
Marzio Merazzi ◽  
Andrea Strini ◽  
Roberto Margutti ◽  
Michele Mercuriali
Keyword(s):  
Regional Scale ◽  
Geological Survey ◽  
Open Pit ◽  
Karst Area ◽  
Fracture System ◽  
Three Dimensional Model ◽  
Structural Setting ◽  
Fault Systems ◽  
Surface Data ◽  
Karst Areas

AbstractAs karst systems are natural windows to the underground, speleology, combined with geological surveys, can be useful tools for helping understand the geological evolution of karst areas.In order to enhance the reconstruction of the structural setting in a gypsum karst area (Vena del Gesso, Romagna Apennines), a detailed analysis has been carried out on hypogeal data. Structural features (faults, fractures, tectonic foliations, bedding) have been mapped in the ”Grotta del Re Tiberio” cave, in the nearby gypsum quarry tunnels and open pit benches. Five fracture systems and six fault systems have been identified. The fault systems have been further analyzed through stereographic projections and geometric-kinematic evaluations in order to reconstruct the relative chronology of these structures. This analysis led to the detection of two deformation phases.The results permitted linking of the hypogeal data with the surface data both at a local and regional scale. At the local scale, fracture data collected in the underground have been compared with previous authors’ surface data coming from the quarry area. The two data sets show a very good correspondence, as every underground fracture system matches with one of the surface fracture system. Moreover, in the cave, a larger number of fractures belonging to each system could be mapped. At the regional scale, the two deformation phases detected can be integrated in the structural setting of the study area, thereby enhancing the tectonic interpretation of the area (e.g., structures belonging to a new deformation phase, not reported before, have been identified underground). The structural detailed hypogeal survey has, thus, provided very useful data, both by integrating the existing information and revealing new data not detected at the surface. In particular, some small structures (e.g., displacement markers and short fractures) are better preserved in the hypogeal environment than on the surface where the outcropping gypsum is more exposed to dissolution and recrystallization.The hypogeal geological survey, therefore, can be considered a powerful tool for integrating the surface and log data in order to enhance the reconstruction of the deformational history and to get a three-dimensional model of the bedrock in karst areas.

scholarly journals Long-lived crustal damage zones associated with fault intersections in the high Andes of Central Chile

2019 ◽  
Vol 46 (2) ◽  
pp. 223 ◽  
Author(s):  
José Meulen Piquer Romo ◽  
Gonzalo Yáñez ◽  
Orlando Rivera ◽  
David Cooke
Keyword(s):  
Regional Scale ◽  
Hydrothermal Activity ◽  
Small Scale ◽  
High Angle ◽  
High Permeability ◽  
Stress Regime ◽  
Central Chile ◽  
Magmatic Arc ◽  
Structural Controls ◽  
Fault Systems

Long-lived, high-angle fault systems constitute high-permeability zones that can localize the upward flow of hydrothermal fluids and magma throughout the upper crust. Intersections of these types of structures can develop complex interference patterns, which constitute volumes of damaged rock (networks of small-scale faults and fractures) where permeability may be significantly enhanced. This is relevant for understanding regional-scale structural controls on the emplacement of hydrothermal mineral deposits and volcanic centers, and also on the distribution of areas of active upper-crustal seismicity. In the high Andes of central Chile, regional-scale geophysical (magnetic, gravimetric, seismic) and structural datasets demonstrate that the architecture of this Andean segment is defined by NW- and NE-striking fault systems, oblique to the N-S trend of the magmatic arc. Fault systems with the same orientations are well developed in the basement of the Andes. The intersections of conjugate arc-oblique faults constitute the site of emplacement of Neogene intrusive complexes and giant porphyry Cu-Mo deposits, and define the location of major clusters of upper-crustal earthquakes and active volcanic centers, suggesting that these fault systems are still being reactivated under the current stress regime. A proper identification of one-dimensional, lithospheric-scale high-permeability zones located at the intersections of high-angle, arc-transverse fault systems could be the key to understanding problems such as the structural controls on magmatic and hydrothermal activity and the patterns of upper-crustal seismicity in the high Andes and similar orogenic belts

Koreans across the Sea: Migration of Laborers to the Metropole, 1910–1937

2019 ◽  
pp. 161-200
Author(s):  
Mikwi Cho
Keyword(s):  
Capital Accumulation ◽  
Regional Scale ◽  
Living Conditions ◽  
Colonial Period ◽  
Global City ◽  
Japanese Empire ◽  
Chain Migration ◽  
Free Mobility

This paper is concerned with Korean farmers who were transformed into laborers during the Korean colonial period and migrated to Japan to enhance their living conditions. The author’s research adopts a regional scale to its investigation in which the emergence of Osaka as a global city attracted Koreans seeking economic betterment. The paper shows that, despite an initial claim to permit the free mobility of Koreans, the Japanese empire came to control this mobility depending on political, social, and economic circumstances of Japan and Korea. For Koreans, notwithstanding poverty being a primary trigger for the abandonment of their homes, the paper argues that their migration was facilitated by chain migration and they saw Japan as a resolution to their economic hardships in the process of capital accumulation by the empire.

Zooplankton community responses to regional-scale weather variability: a synoptic climatology approach

2015 ◽  
Vol 62 (3) ◽  
pp. 189-198 ◽  
Author(s):  
AL Primo ◽  
DG Kimmel ◽  
SC Marques ◽  
F Martinho ◽  
UM Azeiteiro ◽  
...  
Keyword(s):  
Regional Scale ◽  
Zooplankton Community ◽  
Synoptic Climatology ◽  
Community Responses ◽  
Weather Variability

IMPLEMENTATION OF RESPONSIVE ARCHITECTURAL CONCEPTS IN THE DESIGN OF THE CIKOLE FOREST RESORT, BANDUNG, WEST JAVA

2019 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Whinda Rofika Arofah ◽  
Asep Yudi Permana ◽  
Riskha Mardiana
Keyword(s):  
Function Analysis ◽  
Regional Scale ◽  
High Demand ◽  
Tourist Destination ◽  
West Java ◽  
Nature Tourism ◽  
Site Analysis ◽  
Site Design ◽  
The City ◽  
Conceptual Relationship

Indonesia has a lot of potential for nature tourism in the form of mountains, sea, and beaches. This is also an attraction for tourists to make Indonesia as the preferred natural tourist destination when on vacation. Especially West Java, West Java is one of the provinces that are in great demand by local and outside tourists.Besides being famous for its local culture and its unique culinary variety, West Java is also known for its cool air, especially in some parts that are still preserved in nature, the natural potential that is still good and is maintained as an attraction for West Java to attract tourists. One of the famous areas in the city of Bandung which is a tourist destination is the Lembang Region.From the last five years the lodging area in Lembang has increased, currently in Lembang sub-district itself has 13 lodging units in the form of resorts. The amount itself is influenced by the high demand for lodging accommodation especially when the holiday season arrives. But of that number, resorts that have complete and well-maintained facilities and conditions are still not completely even. Based on this fact, the purpose of designing this resort is expected to be the best tourist area in the region to be able to adjust to the conditions of the land conditions, be able to use and not damage the existing land on the design land.The study used in this design is based on the description that occurs today with the support of the literature that supports the theory and analysis that is done. Implementation analysis was carried out using macro and microanalysis methods. Macro analysis is an analysis on a regional scale. While microanalysis is an analysis of the design site, which includes activity analysis, function analysis, space analysis, site analysis, shape analysis, and display and structural analysis and utility.The concept of site and building in this design will produce a conceptual relationship that will later become a guideline in making a design. This concept includes the proposed concept of site design, form, structure, and utility.

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