Alluvial-lacustrine sedimentation and volcaniclastic deposition in an intracontinental tectonic graben: paleoenvironmental evolution of the Neogene Sinanpaşa Basin,west-central Turkey

Akıska, Elif; Varol, Baki

doi:10.3906/yer-1907-28

Cited by 4 publications

(4 citation statements)

References 108 publications

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“…Consequently, the formation of the shoal-water delta complex on the southern margin of the basin was ultimately a consequence of the seesawlike subsidence of the basin floor produced by reciprocal movements of the basin margin faults (Figure 11d). A similar mechanism has been invoked by Ilgar and Nemec (2005), and Akıska and Varol (2020) from lacustrine deposits within other Neogene basins elsewhere in Turkey. During episodes of rising lake level, both the Gilbert-type and shoal-water delta deposits were drowned and replaced by lacustrine carbonates (Figure 11e).…”

Section: Discussionsupporting

confidence: 53%

Basin margin tectonics and morphology as controls of delta type and architecture: examples from the Mio-Pliocene Yalvaç Basin (SW Turkey)

Ilgar¹,

Ergen²,

Ercan³

et al. 2021

Turkish J Earth Sci

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This study describes the sedimentary facies and depositional architectures of Gilbert-type and shoal-water delta deposits developed on opposed margins of the extensional fluvio-lacustrine Yalvaç Basin during the late Cenozoic. The roles of syndepositional tectonism, basin dynamics, and hinterland morphology on the development of different delta types are assessed. This asymmetric trough initially opened as an intramontane molasse basin to the southwest of the Sultandağları massif. Its northern and southern margins are bounded by normal faults, which controlled both tectono-sedimentary evolution of the basin and the surrounding palaeomorphology. The lacustrine deposits consist of thin-bedded limestones, marls, and medium to thick-bedded sandstones and conglomerates. The coarse-grained Gilbert-type delta, up to 150 m thick, was deposited just in the front of the steep northern basin margin. The clinoformal architecture of this delta comprises steeply inclined foreset beds, which are overlain by horizontal alluvial topset units and underlain by subhorizontal bottomset deposits. The Yarıkkaya normal fault controls the northern margin of the basin and plays an active role in both local uplift and subsidence, giving rise to new sediment sources and increasing the accommodation space. Abundant coarse-grained sediment supply into this relatively deep basin across the steep scarp of the Yarıkkaya Fault led to creation of a delta with Gilbert-type architecture. Contemporaneously, on the shallow southern margin of the Yalvaç Basin, several small shoal-water deltas up to 3.5 m thick, were deposited on a smooth basin floor. The gently mound-shaped depositional architecture of these shoal-water delta deposits comprise erosive-based mouth-bar and distributary channel deposits. These observations show that, in this case, the river deposited its bedload shortly after entering the basin, generating small shoal-water deltas that, through stacking over time and some lateral offset, built a shoal-water delta complex.

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Section: Discussionsupporting

confidence: 53%

Basin margin tectonics and morphology as controls of delta type and architecture: examples from the Mio-Pliocene Yalvaç Basin (SW Turkey)

Ilgar¹,

Ergen²,

Ercan³

et al. 2021

Turkish J Earth Sci

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“…On the basis of radiogenic, paleontological, and palynological data, many researches accepted that coal-occurrences in the neighboring basins are early Miocene (Uşak-Güre: Karaoğlu et al, 2010;Ersoy et al, 2011) and late early-middle Miocene (Soma: Akyol, 1987, 1999;Kaya et al, 2007;Kayseri and Akgün, 2008;Seyitömer: Nakoman, 1968;Yavuz-Işık, 2007) in age. On the other hand, based on the palynological data in the investigated area, coal-bearing layers are late middle Miocene in age (Akıska, 2017;Akıska and Varol, 2020). The coal-bearing lacustrine deposits were followed upward by volcanics.…”

Section: Discussionmentioning

confidence: 93%

“…The sedimentological features of the middle Miocene units in the study area were examined in detail by Akıska and Varol (2020). Therefore, in this study, only the lithological properties of the studied units and their depositional systems will be discussed.…”

Section: Sedimentary Units Of Middle Miocenementioning

confidence: 99%

“…Even though, the tectonic and magmatic evolution of the Sinanpaşa basin have been investigated so far, studies regarding the sedimentology and mineralogy of the Neogene lacustrine sediments have less studied in detail. There are only a few studies about Akharım clay deposits around Sandıklı, in the southern part of the Figure 1-a) Location map of Sinanpaşa (Afyon) basin, b) generalized tectonic map of Western Anatolia and tectonic zones around Afyon Zone (simplified from Okay et al, 1996), c) geological map of Sinanpaşa basin (from Akıska and Varol (2020), who modified from Metin et al, 1987).…”

Section: Introductionmentioning

confidence: 99%

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Clay Mineralogy and Paleoclimatic Properties of the Neogene Deposits in Sinanpaşa Basin (Afyon-Western Anatolia)

Akıska¹,

Karakaş²

2020

Bulletin of the Mineral Research and Exploration

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The Sinanpaşa basin, one of the Neogene basins formed in the extensional tectonic regime in Western Anatolia, is located on the eastern margin of Western Anatolia basins containing different types of evaporites, lignite, uranium and clay minerals. Miocene sequence was initiated with alluvial fanfluvial units and followed by lacustrine sediments. River floodplains and lakeshore marshes locally contain economic coal levels. Since middle-late Miocene, the products of Afyon volcanism were deposited into a subaerial or a subaqueous environment alternating with lake sediments. Dominant clay minerals are illite and smectite within the sediments coexistence with the volcanics. These minerals were accompanied by chlorite, kaolinite, and zeolite in some samples. Feldspar, dolomite, thenardite, and gypsum are locally observed too. Sepiolite mineral enrichments are also noteworthy in shallow-coastal lacustrine environments where organic matter is abundant. Clay minerals are mostly detritic and developed due to the weathering of volcaniclastics and sedimentary rocks in temperate/humid climatic conditions. In particular, smectite and kaolinite minerals were formed in situ/authigenic under subaqueous conditions due to the acidic/basic character of tuffs. As a result, different clay mineral types have been developed due to the mineralogical composition of source rocks, climatic factors (humid/semi-humid, arid), paleotopography, depositional environment and diagenetic factors.

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Advances in Limnogeology: The lake‐basin‐type model revisited 25 years after…anomalies, conundrums and upgrades

Benavente,

Bohacs

2024

The Depositional Record

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The lake‐basin‐type model classified the stratigraphic record of ancient lake systems according to rates of potential accommodation relative to sediment + water supply. The model convolved all modes and paths of water supply (direct fall, surficial, subsurface) with amounts and types of sediment supply (clastic, biogenic, chemical) into a single basin‐filling volume term (sediment + water); its major strength was its widespread applicability. This was supported by subsequent investigations confirming the utility of this approach, but it also revealed some important limitations due to simplifications in the original model. The model has been expanded here to address all inland waters (lakes, ponds, wetlands, playas) as well as adding two major subdivisions of the sediment + water term: (1) water supply paths and (2) the volume of water supply relative to sediment supply. Water supply flow paths in the subsurface are subdivided into ‘throughflow’, ‘recharge’ and ‘discharge’. Each of these groundwater hydrology states can be defined quite precisely by the ratio of net outflow to inflow, from persistently open to consistently closed. These paths can be deciphered using stable carbonate and oxygen isotope composition of primary lacustrine limestones, detailed sedimentology, stratigraphy, palaeontology and mineralogy. Distinguishing water supply paths provides additional insights into playa systems and the occurrence and character of evaporites and carbonates. The volume ratio of water to sediment supply most directly influences the water depths of lakes, ponds and wetlands, which affect water body hydrodynamics and ecosystem behaviour as well as the details of stratal stacking and depositional sequences. It helps fine‐tune estimates of the distribution of sediment texture, bedding, composition and organic matter content. The aim of this contribution is to address questions about the fundamental types of inland water bodies and to explain the new lake‐basin subtypes and provide examples that illustrate their potential to enable higher‐resolution, robust analysis of inland water systems and their stratigraphic records.

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Alluvial-lacustrine sedimentation and volcaniclastic deposition in an intracontinental tectonic graben: paleoenvironmental evolution of the Neogene Sinanpaşa Basin,west-central Turkey

Cited by 4 publications

References 108 publications

Basin margin tectonics and morphology as controls of delta type and architecture: examples from the Mio-Pliocene Yalvaç Basin (SW Turkey)

Basin margin tectonics and morphology as controls of delta type and architecture: examples from the Mio-Pliocene Yalvaç Basin (SW Turkey)

Clay Mineralogy and Paleoclimatic Properties of the Neogene Deposits in Sinanpaşa Basin (Afyon-Western Anatolia)

Advances in Limnogeology: The lake‐basin‐type model revisited 25 years after…anomalies, conundrums and upgrades

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