Coherent provenance analysis of terra rossa from the northern Adriatic based on heavy mineral assemblages reveals the emerged Adriatic shelf as the main recurring source of siliciclastic material for their formation

Razum, Ivan; Rubinić, Vedran; Miko, Slobodan; Ružičić, Stanko; Durn, Goran

doi:10.1016/j.catena.2023.107083

Cited by 9 publications

(3 citation statements)

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“…MacLeod (1980) analysed the mineral composition of the insoluble residue of carbonates from western Greece and defined a mineralogical suite of quartz, kaolinite and mica (illite). Kantiranis (2001) studied the carbonate rocks of northwestern Greece and found insoluble residue ⁓1 wt.% consisting mainly of micas, quartz, hematite, chlorite, feldspars and amphibole, whereas the insoluble residue of carbonate basement rocks from Crete also resembles ⁓1 wt.% of the whole rock samples and is composed of a sandy loam matrix rich in quartz, plagioclase (albite) and mica (illite) (Kirsten & Heinrich, 2022), in agreement with recent studies in northeast Adriatic coast (Razum et al, 2023). Thus, the dissolution of the local carbonate parent material within the interbedded sediment layers and in the basal layer of PM soil can release very small quantities of bedrock‐derived impurities such as quartz, plagioclase, illite and kaolinite that are incorporated in the solum but cannot explain the ⁓30‐cm‐thick PM soil mantle and ⁓60‐cm thickness of the layers interbedded in the scree slopes.…”

Section: Discussionsupporting

confidence: 90%

Section: Pm Soil Parent Materialssupporting

confidence: 71%

“…Terra rossa soils receive significant aeolian dust additions from the Sahara and Sahel regions (Durn, 2003;Stuut et al, 2009;Yaalon, 1997). Aeolian dust accretion in terra rossa soils can also originate from a wide range of alluvial deposits, such as sand dunes, desiccated alluvial planes and Quaternary loess (Amit et al, 2020;Erel & Torrent, 2010;Lehmkuhl et al, 2020), especially during cold and arid periods of sea level lowstands and subsequent continental shelves' exposure (e.g., Razum et al, 2023). In the Mediterranean alpine hinterland, thin drapes of Sahara dust-rich soils are found on glacial plateaus, moraines and outwash plains (e.g., Rellini et al, 2009), but also on non-glacial karst plateaus (e.g., D'Amico et al, 2023).…”

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confidence: 99%

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Aeolian dust accretion outpaces erosion in the formation of Mediterranean alpine soils. New evidence from the periglacial zone of Mount Olympus, Greece

Styllas,

Pennos,

Persoiu

et al. 2023

Earth Surf Processes Landf

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Soil formation in Mediterranean periglacial karst landscapes remains poorly understood as the interplay between local and allochthonous sources of parent materials, and mineral alteration and pedogenesis, as dominant post‐depositional processes, depends on a variety of climatic and environmental factors. Herein, we investigate the balance between erosion and aeolian dust accretion in the formation of an alpine soil profile in the periglacial zone of Mount Olympus in Greece. We applied a wide range of analytical methods to 23 samples, from a soil profile developed in a glaciokarstic plateau, from colluvial sediment horizons interbedded in postglacial scree slopes of different maturity and formation age and from modern Sahara dust samples deposited on the snowpack. Colluvial sediment horizons exhibit high concentrations of carbonate gravel and calcite‐rich sand and represent the local erosion products. The soil B horizon developed on the glaciokarstic plateau, contains high amounts of fine earth and is rich in quartz, mica, plagioclase, clays and Fe–Ti oxides. Based on physical and textural characteristics, the soil profile is partitioned in a surficial weathered Bw and an illuvial Bt horizon that overlies the local regolith composed of fragmented glacial till and slope wash deposits. Radiogenic isotope systematics, textural and mineralogical analysis show that the contribution of aeolian (Sahara and locally sourced) dust to the development of the soil B horizon ranges between 50% and 65%. Cryoturbation results in fine earth translocation from Bw to the Bt horizon, whereas weak pedogenetic modifications of detrital (aeolian and bedrock‐derived) minerals result in magnetic mineral weathering and secondary clay formation. Our findings reveal that aeolian dust accretion from Saharan and lcal sources is the dominant process in providing alpine soil parent material and that cryoturbation, weak pedogenesis and clay mineral alteration occur within the Mediterranean periglacial zone of Mount Olympus.

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