Geospatial technology and structural analysis for geological mapping and tectonic evolution of Feiran–Solaf metamorphic complex, South Sinai, Egypt

2013 ◽  
Vol 7 (8) ◽  
pp. 3023-3049 ◽  
Author(s):  
Mohamed O. Arnous ◽  
Yasser M. Sultan
Keyword(s):  
Structural Analysis ◽  
Tectonic Evolution ◽  
Geological Mapping ◽  
Metamorphic Complex ◽  
Geospatial Technology ◽  
South Sinai

scholarly journals EVOLUTION OF KARAKORAM SEQUENCE, HUNZA VALLEY NE PAKISTAN: EVIDENCES FROM FIELD MAPPING AND MICRO-ANALYTICAL WORK

2020 ◽  
Vol 5 ◽  
pp. 19
Author(s):  
S. S. Baig ◽  
C. Xue ◽  
Masroor Alam ◽  
Naeem Ullah ◽  
M. Alam ◽  
...  
Keyword(s):  
Geological Mapping ◽  
Central Portion ◽  
High Grade ◽  
Metamorphic Complex ◽  
Field Mapping ◽  
The North ◽  
Analytical Work ◽  
History Of ◽  
Micro Analysis ◽  
East West

The Karakoram metamorphic Complex (KMC) in the southern Karakoram block is one of the best examples of Barrovian type metamorphism that comprises numerous exhumed metapelite units where a series of low to high grade (green schist to sillimanite facie) rocks are exposed. This sequence shows a complex polyphase history of metamorphism and deformation which offer deeper understanding of collision orogeny. Karakoram metamorphic Complex contains metapelites, meta-carbonates, meta-igneous and amphibolite layers, cross-cut by granite sheets in the northern part. This complex is bounded to the north by the Hunza plutonic unit which is the central portion of the massive east-west trending Karakoram axial batholith and to the southwest by the Main Karakoram thrust (MKT). In this contribution, we provide detail geological mapping, petrography, geochemistry and micro-analytical work using Electron Prob-micro analysis in the central Hunza Valley.

scholarly journals Tectonic evolution of the Tianshan Akeyazi metamorphic complex (NW China)

Lithos ◽  
2020 ◽  
Vol 354-355 ◽  
pp. 105273 ◽  
Author(s):  
Léa Bayet ◽  
Philippe Agard ◽  
Timm John ◽  
Martina Menneken ◽  
Zhou Tan ◽  
...  
Keyword(s):  
Tectonic Evolution ◽  
Metamorphic Complex ◽  
Nw China

Structural analysis and 3D geological modelling of the Santerno transect in the Northern Apennines (Italy)

2020 ◽  
Author(s):  
Griso Lorenzo ◽  
Bistacchi Andrea ◽  
Storti Fabrizio
Keyword(s):  
Structural Analysis ◽  
Structural Model ◽  
Regional Scale ◽  
Structural Data ◽  
Northern Apennines ◽  
Geological Mapping ◽  
External Part ◽  
Recent Earthquakes ◽  
3D Framework ◽  
Combine Surface

<p>We present preliminary results of a structural analysis and 3D modelling project carried out along a transect in the Santerno Valley, between Firenzuola (Tuscany) and the outskirts of Imola. The aim of the project is to combine surface geological and structural data (available thanks to the national geological mapping CARG project and original surveys), with the available subsurface data (2D seismics and a few wells), and obtain a comprehensive 3D framework for deformation in this key area of the Northern Apennines. In addition, by combining geodetic, seismicity and interferometric data with the 3D structural model, we are able to obtain a better picture of the active structures in the area.</p><p>Our analysis shows that the studied transect is at the northern periclinal hinge of a regional anticline/window where the Marnoso-Arenacea Formation crops out and is crosscut by several regional-scale thrusts. Subsurface data suggest that these relatively shallow thrusts are rooted at the top of Mesozoic carbonates, that do not crop out in the area. Different balancing algorithms confirm a relevant along-strike variation of slip along these thrusts, that reduce their offset towards the periclinal hinge to the west.</p><p>In the more external part of the transect, towards the lower hills and the plain around Imola, a regional-scale pop-up, evidenced by the late-Messinian unconformity, is the main feature in subsurface datasets. This structure is rooted at the base of Mesozoic carbonates and is characterized by large and continuous ramps that can be considered candidates for recent earthquakes in the area.</p>

Superimposed deformation of the Solonker Belt and nearby regions in western Inner Mongolia, China

2018 ◽  
Vol 156 (5) ◽  
pp. 811-832 ◽  
Author(s):  
GUANZHONG SHI ◽  
CHAO LIANG ◽  
HUA WANG ◽  
CHUANYAN HUANG
Keyword(s):  
Structural Analysis ◽  
Tectonic Evolution ◽  
Inner Mongolia ◽  
Late Jurassic ◽  
Middle Triassic ◽  
Orogenic Belt ◽  
Far Field ◽  
Quartz Veins ◽  
Central Asian ◽  
Two Stages

AbstractThe deformation of the Solonker Belt and nearby regions is helpful for understanding the tectonic evolution of the Central Asian Orogenic Belt. This study carried out structural analysis in the Mandula and Ganqi areas of western Inner Mongolia, including the Solonker Belt, the Southern Orogenic Belt and the northern Yinshan Belt (Langshan range). Our results reveal that the Solonker Belt, the Southern Orogenic Belt and the northern Yinshan Belt underwent two stages (D1 and D2) of deformation during the Mesozoic period. The D1 stage produced the NNE-directed thrusts and asymmetric folds, indicating a NNE–SSW contraction. The northern Yinshan Belt, the Southern Orogenic Belt and the Solonker Belt formed as a series of NNE-verging tectonic nappes. The D2 stage developed the NE-trending folds and the SE- or NW-directed thrusts that cross-cut the D1 structures. The two events of nearly orthogonal or oblique shortening gave rise to the superimposed structures (e.g. fold interference patterns). The quartz veins that filled the fractures of the D1 deformation contain zircons of Middle Triassic U–Pb ages. The new dating data, along with the regional sedimentary hiatus, led us to infer that the D1 stage of deformation occurred in Middle Triassic time and the D2 stage occurred in Late Jurassic time. We consider that the D1 stage of deformation resulted from a convergent event, which might be related to the closure of the Palaeo-Asian Ocean or limited, narrow ocean basins; and the D2 stage of deformation was the far-field result of subduction of the Palaeo-Pacific Ocean and the closure of the Mongol-Okhotsk Ocean.

scholarly journals The Piúma lineament, southern Espirito Santo: structural expression and tectonic significance

2016 ◽  
Vol 46 (4) ◽  
pp. 531-546 ◽  
Author(s):  
Fernanda Silva Lourenço ◽  
◽  
Fernando Flecha de Alkmim ◽  
Mário Neto Cavalcanti de Araújo ◽  
Marco Antonio Thoaldo Romeiro ◽  
...  
Keyword(s):  
Structural Analysis ◽  
Continental Margin ◽  
Tectonic Evolution ◽  
Satellite Images ◽  
Topographic Maps ◽  
Espírito Santo ◽  
Detailed Structural Analysis ◽  
Campos Basin ◽  
Tectonic Significance ◽  
Espirito Santo

ABSTRACT: The Piúma lineament, located in the Southern Espírito Santo State, Brazil, is one of the most prominent linear morphostructural features of the northern Mantiqueira Province. The lineament stands out in satellite images and topographic maps, extending for about 70 km in a N50°W direction, between the towns of Iconha and Conceição do Castelo (Espírito Santo). In order to investigate the nature and role played by the Piúma lineament in the tectonic evolution of the Mantiqueira Province and adjacent Campos Basin, we carried out a detailed structural analysis based on fieldwork, as well as geophysical data processing and interpretation. The results we obtained indicate that the Piúma lineament is a brittle shear zone characterized by N50W-trending and SW-dipping shear fractures, faults and joints. These structures record two distinct and incompatible motions, thereby recording the operation of two tectonic regimes: NNE-SSW extension and E-W transtension. Comparing our results with the literature on the Southeastern Brazilian Continental Margin, we conclude that the Piúma lineament more likely developed after the Ediacaran Brasiliano orogenic event in response to an NNE-SSW extension, experiencing later a reactivation as normal dextral to dextral transtensional zone, probably in connection with the South Atlantic rifting in the Lower Cretaceous.

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