Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1346/CCMN.2016.0640206 |
MINERALOGY, GEOCHEMISTRY, AND GENESIS OF SEPIOLITE AND PALYGORSKITE IN NEOGENE LACUSTRINE SEDIMENTS, ESKISEHIR PROVINCE, WEST CENTRAL ANATOLIA, TURKEY | |
Kadir, Selahattin1; Erkoyun, Hulya1; Eren, Muhsin2; Huggett, Jennifer3; Onalgil, Nergis1 | |
通讯作者 | Kadir, Selahattin |
来源期刊 | CLAYS AND CLAY MINERALS
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ISSN | 0009-8604 |
EISSN | 1552-8367 |
出版年 | 2016 |
卷号 | 64期号:1-2页码:145-166 |
英文摘要 | Sepiolite and palygorskite are ccommon as layers and nodules in the Neogene lacustrine sediments of the Eskisehir area. This study aims to determine their mineralogical and geochemical characteristics, plus the distribution of these economically important sepiolite and palygorskite deposits within the lacustrine environment. Using these data the research goes on to discuss the environmental conditions for their formation. Sepiolite and palygorskite layers are associated with dolomite, marlstone, and argillaceous limestone. The sepiolite nodules (meerschaum), which are former magnesite gravels, are observed in the Upper Miocene reddish-brown fluvial deposits derived from the ophiolite and its fracture-infills at the northern margin of the basin. Sepiolite and palygorskite are only sparsely associated with dolomite and accessory magnesite, quartz, feldspar, and amphibole. Sepiolite and palygorskite fibers formed as oriented platy fan, interwoven, and knitted aggregates in the absence of dolomite indicated precipitation from supersaturated solution. Sepiolite and palygorskite fibers edging dolomite crystals postdate dolomite and formed through precipitation in a vadose environment under semi-arid to arid climatic conditions. High values of Mg+Fe+Ni and enrichment of light rare earth elements (LREE) relative to middle rare earth elements (MREE) and heavy rare earth elements (HREE), Sr content, depletion of Rb+Ba and K, and negligible negative Eu anomalies all reflect the derivation from the Paleozoic metamorphic and Upper Cretaceous ophiolitic rocks. Locally, Upper Miocene to Lower Pliocene volcanic, volcanoclastic, and fluvio-lacustrine sedimentary rocks supplied the required Si, Mg, Al, and Fe for precipitation of Al-sepiolite and Mg-palygorskite with average structural formulae of Si11.91Al0.09O30Mg6.60Al0.78Fe0.13 (OH)(4)Na0.12K0.06(OH2)(4).nH(2)O and Si7.74Al0.26O20Mg2.52Al1.13Fe0.38(OH)(2)(OH2)(4)Na0.32K0.14 Ca-0.12.nH(2)O, respectively. In contrast to the layered sepiolites, the absence of Al and high Ni content in sepiolite nodules suggest formation through replacement of magnesite gravels at shallow burial in an alkaline environment. The calculated meerschaum sepiolite chemical formula is: Si12.02O30Mg7.87Fe0.01(OH)(4)Na0.3K0.03(OH2)(4).nH(2)O. |
英文关键词 | Argillaceous Carbonate Dolomite Eskisehir Meerschaum Sepiolite Neogene Palygorskite Sepiolite Turkey |
类型 | Article ; Proceedings Paper |
语种 | 英语 |
国家 | Turkey ; England |
收录类别 | SCI-E ; CPCI-S |
WOS记录号 | WOS:000381953000008 |
WOS关键词 | CLAY-MINERALS ; HYDROGEN ISOTOPE ; SOUTHERN TURKEY ; METEORIC WATERS ; MADRID BASIN ; MERSIN AREA ; MG-RICH ; OXYGEN ; DEPOSITS ; SPAIN |
WOS类目 | Chemistry, Physical ; Geosciences, Multidisciplinary ; Mineralogy ; Soil Science |
WOS研究方向 | Chemistry ; Geology ; Mineralogy ; Agriculture |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/192071 |
作者单位 | 1.Eskisehir Osmangazi Univ, Dept Geol Engn, TR-26480 Eskisehir, Turkey; 2.Mersin Univ, Dept Geol Engn, TR-33343 Mersin, Turkey; 3.Nat Hist Museum, Dept Earth Sci, Cromwell Rd, London SW7 5BD, England |
推荐引用方式 GB/T 7714 | Kadir, Selahattin,Erkoyun, Hulya,Eren, Muhsin,et al. MINERALOGY, GEOCHEMISTRY, AND GENESIS OF SEPIOLITE AND PALYGORSKITE IN NEOGENE LACUSTRINE SEDIMENTS, ESKISEHIR PROVINCE, WEST CENTRAL ANATOLIA, TURKEY[J],2016,64(1-2):145-166. |
APA | Kadir, Selahattin,Erkoyun, Hulya,Eren, Muhsin,Huggett, Jennifer,&Onalgil, Nergis.(2016).MINERALOGY, GEOCHEMISTRY, AND GENESIS OF SEPIOLITE AND PALYGORSKITE IN NEOGENE LACUSTRINE SEDIMENTS, ESKISEHIR PROVINCE, WEST CENTRAL ANATOLIA, TURKEY.CLAYS AND CLAY MINERALS,64(1-2),145-166. |
MLA | Kadir, Selahattin,et al."MINERALOGY, GEOCHEMISTRY, AND GENESIS OF SEPIOLITE AND PALYGORSKITE IN NEOGENE LACUSTRINE SEDIMENTS, ESKISEHIR PROVINCE, WEST CENTRAL ANATOLIA, TURKEY".CLAYS AND CLAY MINERALS 64.1-2(2016):145-166. |
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