{"refrec":{"BRefID":323183,"RR":"<b>Tzifas, I.T.; Papadopoulos, A.; Misaelides, P.; Godelitsas, A.; Göttlicher, J.; Tsikos, H.; Gamaletsos, P.N.; Luvizotto, G.; Karydas, A.G.; Petrelli, M.; Noli, F.; Kantarelou, V.; Kontofakas, A.; Hatzidimitriou, A.</b> (2019). New insights into mineralogy and geochemistry of allanite-bearing Mediterranean coastal sands from Northern Greece. <i>Chemie der Erde-Geochemistry 79(2)</i>: 247-267. <a href=\"https://dx.doi.org/10.1016/j.chemer.2019.05.002\" target=\"_blank\">https://dx.doi.org/10.1016/j.chemer.2019.05.002</a>","BEntID":316654,"PublicFlag":1,"CheckedFlag":1,"wosflag":1,"vabbflag":0,"RefStringPartII":". <i>Chemie der Erde-Geochemistry 79(2)</i>: 247-267. <a href=\"https://dx.doi.org/10.1016/j.chemer.2019.05.002\" target=\"_blank\">https://dx.doi.org/10.1016/j.chemer.2019.05.002</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":1,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Tzifas, I.T.; Papadopoulos, A.; Misaelides, P.; Godelitsas, A.; Göttlicher, J.; Tsikos, H.; Gamaletsos, P.N.; Luvizotto, G.; Karydas, A.G.; Petrelli, M.; Noli, F.; Kantarelou, V.; Kontofakas, A.; Hatzidimitriou, A.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Tzifas, I.T. <i>et al.</i>","Englishabstract":"Allanite-bearing black coastal sands of Kavala (N. Greece) were studied using a combination of single-crystal XRD, EMPA, μ-XRF, bulk ICP-MS, LA-ICP-MS, μ-XANES and γ-ray spectrometry. The sands are rich in REE (ΣREE + Y: 4010 to 10,810 mg/kg), Th (236–1205 mg/kg) and other critical metals such as Nb, Ta and Co. The main REE- and Th-hosts are allanite and titanite. The allanite unit cell parameters were calculated whereas its formula was found to be (REE<sub>0.470</sub>Ca<sub>1.499</sub>Th<sub>0.031</sub>) (Ti<sub>0.031</sub>Fe<sup>+3</sup><sub>1.089</sub>Al<sub>1.880</sub>) (Si<sub>2.906</sub>Al<sub>0.094</sub>O<sub>12</sub>) (OH). The μ-XANES spectra showed that LREE are present in trivalent oxidation state. Analyses of the non-magnetic sand fractions showed higher LREE (12,470 mg/kg) due to accumulation of allanite. The materials showed elevated radioactivity ranging from 885 ± 13 to 3467 ± 20 Bq/kg. The obtained results provide new insights on the provenance of the sands, the abundance of REE, Th, and other immobile elements, and offer new clues for potential exploration and exploitation.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"New insights into mineralogy and geochemistry of allanite-bearing Mediterranean coastal sands from Northern Greece","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2024-12-10 01:33:17.368041","timezone_type":1,"timezone":"+01:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Kavala; Beach placer; REE; Thorium; Allanite; mu-XRF; SR-XANES","OtherDescriptors":null,"Notes":null,"AnaPub":2019,"MonPub":null,"DateUpdate":"2020-04-15","DateCreate":"2020-04-07","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000494249000004","VABBcode":null,"OpenAcc":0,"DOI":"10.1016/j.chemer.2019.05.002"},"refs":null,"anarec":{"AnaID":323183,"PubliDate":2019,"Pagination":"247-267","XtraPublOfAnaID":null,"ISBN":null,"Volume":"79","Issue":"2","BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":265599,"SerRR":"Chemie der Erde-Geochemistry: Jena.  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