Trace and Rare Earth Elements chemistry of detrital garnets in the SE Alps and Outer Dinarides flysch basins: An important tool to better define the source areas of sandstones

OH-Defects in Detrital Quartz Grains from the Julian Basin (NE Italy and Slovenia): A Fourier Transform Infrared Study

“…Recently, trace and rare earth (RE) elements in garnets have been studied from the region [14]. The authors analyzed about 250 garnets from different basins in the SE Alps, including in the Julian Basin, where the most common types are, according to Mange and Morton [37] classification, Bi, Bii, and Ci, with very low amounts of A and D. Almost 90% of garnets from JB1 belong to the Bii and Ci types, almost 85% of garnets from JB23 are in the B typology, JB26 shows a wider spread distribution (including D type), while JB17 present contributions that are equally distributed between the Bi, Bii and Ci types (Figure 2d).…”

“…According to the previous interpretations [13,14,36], it is possible that the main volcanic detrital quartz could be supplied from the Drina-Ivanica microcontinent or the intraophiolitic Jurassic granitoids, while the metamorphic quartz is related to the metamorphic soles of ophiolitic emplacement related to the closure of the Vardar (JB1 and JB17) and Pindos oceans (JB23 and JB26), respectively.…”

“…Previous mineralogical (Cr-spinel, garnet, zircon, and rutile), petrological (study of clasts in basal conglomerate and thin section analyses), and geochemical (bulk rock) studies [4,[11][12][13][14][15][16][17] were compared with the results of this study. The results of those studies show a substantial change in source rocks during the activity of the basin.…”

“…Four samples from the Julian Basin were selected according to their stratigraphic age: JB1 (sampled in Bovec, Slovenia) is Maastrichtian, JB17 is Upper Paleocene (from Monteaperta, Friuli Venezia Giulia region), and JB23 and JB26 are Early Eocene (from Nimis and Monte Candia, Friuli Venezia Giulia region) (Figure 2a). The rocks were crushed in a mortar; then, heavy minerals were concentrated by sieving, magnetic separation, and heavy liquids (1,1,2,2 Tetrabromoethane), for to other studies [12][13][14][15][16]. The residual part (mainly quartz, calcite, and feldspar) was treated with hydrochloric acid (HCl 10%) to dissolve calcite, rinsed with distilled water to remove acid traces, and dried at a temperature of 90 • C. For each sample, 20 quartz grains were prepared for IR spectroscopy, according to the protocol described by Stalder and Konzett [27], adding up to a total of 80 crystals.…”

Congresso SIMP-SGI-SOGEI 2019 - Il tempo del pianeta Terra e il tempo dell'uomo: Le geoscienze fra passato e futuro

“…The mixed carbonatic and siliciclastic sediments supplies are supposed to belong to the Adriatic Carbonatic platform that are well represented in all the north eastern part of the Adria Plate and the ophiolitic-crystalline rocks outcropping mainly in the Dinarides (i.e. Lenaz et al, 2000Lenaz et al, , 2018Tunis & Venturini, 1997). The rock samples have been crushed with a jaw grinder and mechanically sieved to obtain a grain size between 63 and 250 μm.…”