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Department of Geological Hazards/Laboratory of Geodynamics and Hazardous Geological Processes/Maps and Graphics
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Active tectonics north of the Arabian plate (from Avagyan et al. 2005). 1: Major strike–slip faults. 2: Major thrust faults. 3: Relative motion of blocks with respect to Eurasia. 4: Focal mechanisms of Mw . 4.8 earthquake (CMT Harvard). 5: Instrumental seismicity of 3 , Mb , 4.9 (USGS-NEIC). Ar, Armenia; D, Dagestan; T, Talish; E.A.F., East Anatolian fault; N.A.F., North Anatolian fault; P.S.S.F., Pambak - Sevan-Sunik fault, Z.F., Zagros fault; N.T.F., North Tebriz fault; G.S.F, Geltarechka-Sarikhamish fault.


Summary structural map adapted from Karakhanian et al. (2013).

Cross-section of the Lesser Caucasus (Sosson et al., 2010).

Geologic cross section of the Lesser Caucasus in Armenia and Azerbaijan (Avagyan et al., 2010).

Paleotectonic reconstruction of the 83-46Ma period in frame of MEBE program (Sosson et al., 2010, after Barrier & Vrielynck 2008).

 

Collision Structures

 

Collision Structures

 

Geopetrological map of Armenian (Tsaghkunyats) crystalline massif. 


The Lanjanist and Vank anticlines and associated faults (LF, VF) (view looking north from the Urts anticline). (a) Field photograph; (b) interpretation; (c) photograph of the church of St Karapet (Avagyan et al. 2018).

 a: Map of active faults within Amasia region (Arpi fault system): 1: inferred faults, 2: normal faults, 3: strike-slip faults, 4: reverse faults, 5: depressions. ANF (ANF1 and ANF2): Amasia North Fault, ASF: Amasia South Fault, ACF: Amasia Central Fault, JSF: Jeltarechka-Sarighamish Fault, VS: Vanazor segment (PSSF). b: 3D diagram showing our interpretation of the pop-up structure (black and white arrows point out the main fault scarps and the abandoned Hovtun River, respectively), c: Geological map of the Amasia region, 6-recent sediments, 7-andesites and basaltic andesites, 8-doleritic basalts, 9-andesites, dacites and rhyodacites, 10-tuff-sandstones, marls and limestones, 11-diorites and granodiorites, 12-marls, limestones and clays, 13 e conglomerates, sandstones, limestones and siltstone, 14 e ophiolites. d: Topographic profile (AB) across the Amasia Plateau showing the vertical displacements along the bounding faults (Ritz et al., 2016).

Schematic scenario for the two last earthquakes having ruptured the western fault within the Gailahovit Valley: 1- first seismic event, 2- accumulation of S1 sedimentary unit, 3- erosion, 4- second seismic event, 5- accumulation of S0 sedimentary unit.

The colossi of Amenhotep III (the Memnon Colossi) in front of the first pylon of the temple (Karakhanyan et al., 2010).

The northern wall maps (a, b) and wall photo (c) near the Stella. A-sludge, B- silt, contains sandstone fragments C- "destruction layer", containing circular blocks probably of the slanted part of the temple tilted toward the center, D-dark sand, contains sandstone fragments, E- lower horizon (Karakhanyan et al., 2010). 

Cross-section about 16 km NW from Khoy city (cross-section 4, Fig. 2) (Avagyan et al., 2017). Key: 1, Qom limestones; 2, conglomerates; 3, Permian limestones; 4, metasediments; 5, thermal alteration zone; 6, granites; 7, diabases; 8, fault. (b) Simplified N-S cross-section of the Palaeozoic outcrop to the west of Khoy city (cross-section 5, Fig. 2). Key: 1, Permian limestones; 2, metasediments, carbonate - siliceous rocks (phthanites); 3, diabase dyke; 4, greenschists; 5, faults. (c) Cross-section of about 3.5 km length 1.5 km SW of Arab-Dizaj village (cross-section 1, Fig. 2). Key: 1, basalts; 2, siltstones; 3, limestones, brecciated limestones; 4, conglomerate, principally composed of limestone

Part of the Noratus-Kanagegh fault segment 1- lower block of normal fault, 2- upper block of normal fault. Arrows are showing dislocated two horizons of scoria (black arrows are on lower block).

a) Tectonic map of the Lesser Caucasus and the area to the south including the Ararat depression (Avagyan et al., 2018).

 (b) Geological map of the northern margin of the Ararat depression in SE Armenia (modified from Avanesyan, 2004; Arakelyan, 1949). Key: TIGR. TB, Tigranashen tilted block; ARM. TB, Armash tilted block; KV-SPF, Khor Virap - Sari Pap fault; LF, Lanjanist fault; UF, Urzaberd fault; VF, Vank fault; UAF, Urts-Aghbyur fault; TF, Tigranashen fault. Key for stratigraphic ages: 1. Recent - Late Quaternary; 2. Late Quaternary; 3. Late Pliocene - Early Quaternary; 4. Late Oligocene - Early Miocene; 5. Late Oligocene - Early Miocene; 6. Early Oligocene; 7. Late Eocene; 8. Middle Eocene; 9. Early Eocene; 10. Paleocene; 11. Santonian; 12. Late Coniacian - Early Santonian; 13. Cenomanian - Turonian; 14. Middle Jurassic - Early Cretaceous; 15. Early Triassic; 16. Early - Late Permian; 17. Early Carboniferous; 18. Late Devonian; 19. Late Oligocene - Early Pliocene.

(A). Approximately north-south cross-section through the Lanjanist and Urts anticlines and the northern margin of the Ararat depression (section a-a', Fig. 1B).

The anticlines are interpreted as fault-propagation folds located in the hangingwalls of major north-dipping thrust faults. LF, Lanjanist fault; UF, Urzaberd fault; VF, Vank fault; UAF, Urts-Aghbyur fault; TF, Tigranashen fault. B. Field photograph of the Urts anticline and Tigranashen tilted block. C, D. 3D Digital Globe satellite images of the fore-limb of the Urts anticline and the Tigranashen tilted block.

(a) Schematic north-south oriented cross-section through a splay of the Khor Virap - Sari Pap thrust in
a Quaternary succession at a location about 4km to the SW of Ararat city (location 2, Fig. 1B). See text for details. (b) Field photograph showing slickensides indicating a right-lateral component of movement. (c) Field photograph of the southern portion of the outcrop

(a) Outcrop photograph showing a low angle thrust fault within Permian limestones at a location to the
east of the Urts anticline (location 1, Fig. 1B); the thrust plane dips 19o to the north.

(b) Outcrop photograph showing strike-slip faults in Permian limestones. A structural component of NNESSW compression is identified on the Schmidt lower hemisphere projection (red lines are faults; green, anticlinal and synclinal folds; arrows indicate the axes of compression and extension), which indicate a NNESSW oriented compressional axis.