Provenance of quartz grains from soils over Quaternary terraces along the Guadalquivir River, Spain
نویسندگان
چکیده
The characterisation of quartz grains’ chemical and mineralogical properties in sediments sedimentary rocks is widely used provenance studies. This paper analyses grains from the coarse sand fraction soils Quaternary fluvial terraces (Guadalquivir River, southern Spain). tentative soil ages are 0.3 ka (Haplic Fluvisol), 7 Calcisol), 70 (Cutanic Luvisol), 300 (Lixic Calcisol) 600 Luvisol). shed light on sedimentological history these terraces. Scanning electron microscope cathodoluminescence (SEM-CL) characteristics, micro inclusion inventory established by Energy-dispersive X-ray spectroscopy (SEM-EDX) trace element contents determined with laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) permitted distinguishing six types studied: metamorphic (type 1), undeformed granitic 2), strongly altered 3), recrystallised (deformed) 4), sandstone-derived 5) hydrothermal 6). Metamorphic 1) come Sierra Morena (Iberian Massif) Nevada (Internal Betic Zone). Granitic (types 2 to 4) Los Pedroches batholith its associated plutons (Santa Elena Linares). type 5 comes numerous sandstone outcrops scattered central catchment area Guadalquivir River. Finally, 6) originate veins subvolcanic batholith. Variations were noted proportions different ages, attributed spatial temporal changes area. most remarkable change occurred between 500 240 ago when extended into Nevadás rocks, well reflected 1 content (lower P2, P4, P5 PM) their characteristics (quartz less healed fractures, Al content, bigger mica microinclusions, smaller Al/Ti ratio) post-500–240 soils. Our study shows that combined SEM-CL inclusions (SEM-EDX), an efficient approach for characterising
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ژورنال
عنوان ژورنال: Geoderma
سال: 2022
ISSN: ['0016-7061', '1872-6259']
DOI: https://doi.org/10.1016/j.geoderma.2022.115769