Constraints on unconsolidated pyroclastic flow sediments related REE enrichments originated from potassic-alkaline Gölcük stratovolcano: Darıdere-Direkli-Yakaören (DDY) table 4deposits, southwestern Anatolia of Turkey

作     者：Murat Budakoglu Ali Tugcan Unluer Zeynep Doner Huseyin Kocaturk Mustafa Kaya Mustafa Kumral M.Sezai Kirikoglu Murat Budakoglu;Ali Tugcan Unluer;Zeynep Doner;Huseyin Kocaturk;Mustafa Kaya;Mustafa Kumral;M.Sezai Kirikoglu

作者机构：Department of Geological EngineeringFaculty of MinesIstanbul Technical UniversityIstanbulTurkey 

出 版 物：《Acta Geochimica》 (地球化学学报（英文）)

年 卷 期：2021年第40卷第6期

页      面：926-944页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

基　　金：supported by the CAYDAG(1001)from the Scientific and Technological Research Council of Turkey(TUBITAK) 

主　　题：Pyroclastic flows Rare Earth Elements(REE) Apatite Britholite Chevkinite Alkaline-Ultrapotasic magmatism 

摘      要：In the last five decades,Rare Earth Elements(REE)are mostly produced from carbonatite complexes and alkaline magmatic *** this respect,pyroclastic flows produced by the potassic-alkaline Gölcük volcanism in the Isparta(SW,Turkey)angle stand out as an important target area where REE enrichments can be *** study focuses on the REE potential,geochemical and mineralogical characteristics of REE-bearing minerals as well as formation modeling of unconsolidated pyroclastic flows in Darıdere-Direkli-Yakaören(DDY)deposits in ***-bearing minerals of DDY deposits which contain abundant trachytic-trachyandesitic rock fragments were determined as fluorapatite,britholite,and chevkinite by using XRD and SEM–EDX *** to the geochemical analysis,the vast majority of RREE(up to 996 ppm)content is LREE such as La,Ce and ***ıdere is the most REE enriched region followed by Yakaören and Direkli regions in terms of LREE(574.9 ppm),relative to MREE(38.5 ppm)and HREE(5.28 ppm)*** results are also on par with subduction-related Italian extrusive carbonatites such as Polino,Cupaello and San *** DDY deposits can also be comparable with intraplate extrusive REE deposits in terms of LREE enrichments,however,HREE,Nb,Th and Zr values are generally *** RREE concentrations tend to rise with the increasing contents of alkaline elements(Na and K),HFSE(such as Nb and U),as well as LILE(Ba,Sr and Rb)and are negatively affected by sedimentary carbonate *** economic value of the DDY deposits can gain importance due to the increasing global demand for LREE’s.