Three-dimensional control of alluvial fans by rock uplift in an extensional regime: Aydın Range, Aegean extensional province

Özpolat, Emrah; Yıldırım, Cengiz; Görüm, Tolga; Gosse, John C.; Şahi̇ner, Eren; Sarıkaya, Mehmet Akif; Owen, Lewis A.

doi:10.1038/s41598-022-19795-0

Cited by 13 publications

(5 citation statements)

References 71 publications

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“…Geologically, the Pergamon micro-region is located in the western Extensional Province of Anatolia, which is regarded as one of the most rapidly extending regions on Earth (Özpolat et al, 2022). The NE-striking Miocene Zeytindağ and Örenli–Eğiller Grabens and the Plio-Pleistocene Bergama Graben formed under tectonic stress (Bozkurt, 2003; Yang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Mid- to Late Holocene geomorphodynamics in a long-term settled mountain catchment in the Pergamon micro-region, western Turkey

et al. 2023

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From 300 BC to AD 300, the city of Pergamon underwent a profound transformation that impacted the rural settlement patterns and the concomitant geomorphodynamics. We present a geoarchaeological study in a long-term settled catchment in the Pergamon micro-region to disentangle the Holocene geomorphodynamics and triggering factors, for example, climate change and human activity. The analyses of eight radiocarbon-dated sediment profiles from the Tekkedere alluvial fan and its catchment indicate four principal sedimentation phases. Phase 1 (ca. 6.2 to 5–4 ka) is dominated by the floodplain aggradation of the receiving Bakırçay River, which is followed by the formation of floodplain soils (phase 2). Substantial geomorphodynamic changes occurred around 4 ka (phase 3), when the edge of the floodplain was buried by fan sediments of the tributary Tekkedere creek. This is attributed to supraregional aridization and rapid climate change events, superimposed by the onset of local human activities. Repeated cycles of coarse- and fine-textured fan sediments with age inversions after ca. 3.8 ka and valley infills younger than 1300 yr BP indicate the strong erosion and redeposition of sediments in phase 4. These increased geomorphodynamics may coincide with the changing settlement pattern and thus reflect human–environment interactions.

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Section: Introductionmentioning

confidence: 99%

Mid- to Late Holocene geomorphodynamics in a long-term settled mountain catchment in the Pergamon micro-region, western Turkey

et al. 2023

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“…For example, Özpolat et al. (2022) suggest that rock uplift rates along the BMGF are larger in the easternmost segment, whereas we model the highest slip rates in the center of the faults. The actual slip rates for the studied period are difficult to estimate.…”

Section: Discussion and Interpretationmentioning

confidence: 92%

Constraining Historical Earthquake Sequences With Coulomb Stress Models: An Example From Western Türkiye

Diercks,

Mildon,

Boulton

et al. 2023

JGR Solid Earth

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Knowledge of earthquake source faults is crucial for the calculation of robust Coulomb stress models. However, source faults are often poorly constrained, especially for pre‐instrumental events, and these historical earthquakes are commonly studied with little or no consideration of other nearby events. We introduce an approach using Coulomb Stress Transfer (CST) modeling to investigate historical earthquake sequences and constrain possible source faults. Using historical and instrumental records from the Büyük Menderes Graben, western Türkiye, we create an ensemble of earthquake sequences featuring multiple rupture scenarios for individual earthquakes, and model both coseismic and interseismic CST. We filter and evaluate the models based on criteria to gain knowledge on historical earthquakes and their source faults and assess the current stress state and related seismic hazard of the investigated fault network. For our study area, the results provide further constraints on the source faults of several historical earthquakes, including the destructive MW 7.0 earthquake in 1899. The approach presented herein is applicable to other tectonically active areas where the causative faults of historical earthquakes are poorly constrained from existing data sets (e.g., paleoseismology, damage records), providing a new tool to help decipher historical earthquake sequences and improve modeling studies.

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“…The height/erosion depth of each landslide was calculated using the DOD value was used to calculate. The total volume of a landslide body is the sum of the DOD values of all grid cells multiplied by the unit grid cell area 48 , 49 . Thus, we calculated the volume of each landslide individually as: where is the volume of the landslide numbered , with = 1–22; is the total number of grid cells for that particular landslide; is the elevation difference of each grid cell in the landslide area, that is, the DOD value of each grid cell; represents the area of the unit grid cell (i.e., 30 m × 30 m).…”

Section: Methodsmentioning

confidence: 99%

Quantitative assessment of the erosion and deposition effects of landslide-dam outburst flood, Eastern Himalaya

Dong,

Wang,

Yang

et al. 2024

Sci Rep

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Both regular flow and infrequent outburst floods shape the mountain landscape, but their relative contributions have been widely debated, in part due to the paucity of quantitative data on historical outburst floods. In June 2000, an outburst flood was triggered by a landslide-dam failure in a rapidly exhumed region of the Eastern Himalaya. To investigate the role of this kind outburst flood on landscape evolution, we employ topographic differencing, satellite imagery, and 2D hydraulic simulations to quantify the equivalent erosion and deposition within ~ 80 km flood route downstream of the breach. The flood lasted for ~ 10 h, with a peak discharge of 105 m3/s, leading to average erosion of 10 m, and contributed ~ 1–2 × 103 times more sediment than over long-term mean fluvial processes. The flood produced extensive lateral erosion, which triggered a threefold widening of the valley floor and abundant subsequent landslides. The ubiquitous boulder bars deposited in the channel inhibited incision, and facilitated lateral erosion after the flood. The resulting channel configuration and extensive bank erosion continue to affect fluvial dynamics until the next catastrophic flood that remobilizes the boulders. Our quantitative findings highlight the profound importance of recurrent outburst floods for gorge development and landscape evolution in Eastern Himalaya.

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Three-dimensional control of alluvial fans by rock uplift in an extensional regime: Aydın Range, Aegean extensional province

Cited by 13 publications

References 71 publications

Mid- to Late Holocene geomorphodynamics in a long-term settled mountain catchment in the Pergamon micro-region, western Turkey

Mid- to Late Holocene geomorphodynamics in a long-term settled mountain catchment in the Pergamon micro-region, western Turkey

Constraining Historical Earthquake Sequences With Coulomb Stress Models: An Example From Western Türkiye

Quantitative assessment of the erosion and deposition effects of landslide-dam outburst flood, Eastern Himalaya

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