Knowledge Resource Center for Ecological Environment in Arid Area
delta D and delta O-18 Values of Halloysite-Kaolinite and Goethite-Hematite in the Fe Deposit of Tamra (N-W Tunisia): New Insights for Mixing Fluids during Ore Formation | |
Dekoninck, Augustin1; Yans, Johan1; Vennemann, Torsten2; Moussi, Bechir3; Jamoussi, Fakher3; Hatira, Nouri4; Chaftar, Hedi-Ridha4 | |
通讯作者 | Dekoninck, Augustin |
会议名称 | 13th SGA Biennial Meeting on Mineral Resources in a Sustainable World |
会议日期 | AUG 24-27, 2015 |
会议地点 | Nancy, FRANCE |
英文摘要 | The iron mine of Tamra (Nefza District, NW Tunisia) is located within the approximately 50 m thick Zanclean sedimentary series. This sequence contains Fe-Mn oxide impregnation associated with halloysite-kaolinite occurrences. Fluid evaporation during weathering and pedogenesis, and/or mixing of surface water and regional hydrothermal fluids are considered to be related to the concentration of iron in those sediments. The stable isotope geochemistry of oxygen and hydrogen of goethite-hematite, and halloysite-kaolinite, was examined in order to provide new insights to the ore formation. The main outcomes of this study indicate that halloysite-kaolinite and goethite did not equilibrate with the same fluid during supergene conditions. In a delta D and delta O-18 diagram, kaolinite from the Tamra deposit plots to the right side of the kaolinite line, which would correspond to unlikely formation temperatures of below 0 degrees C. delta D and delta O-18 values of goethite allow for the same conclusion. The origin of these unusual compositions could be due to two main factors: 1) the arid Zanclean climate with mineral formation from evaporative brines and/or 2) fluid-mineral fractionations with relatively high delta O-18 hydrothermal fluids. |
英文关键词 | delta O-18 delta D stable isotope Tamra mine iron deposit Nefza district Tunisia |
来源出版物 | MINERAL RESOURCES IN A SUSTAINABLE WORLD, VOLS 1-5 |
出版年 | 2015 |
页码 | 441-444 |
ISBN | 978-2-85555-066-4 |
出版者 | ASGA-ASSOC SCIENTIFIQUE GEOLOGIE & APPLICATIONS |
类型 | Proceedings Paper |
语种 | 英语 |
国家 | Belgium;Switzerland;Tunisia |
收录类别 | CPCI-S |
WOS记录号 | WOS:000374801300097 |
WOS关键词 | NEFZA MINING DISTRICT ; CLAY-MINERALS ; ISOTOPE GEOCHEMISTRY ; IRON-MINE ; OXYGEN ; HYDROGEN ; PLIOCENE ; OXIDES ; RATIOS ; LASER |
WOS类目 | Geosciences, Multidisciplinary ; Mineralogy |
WOS研究方向 | Geology ; Mineralogy |
资源类型 | 会议论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/303490 |
作者单位 | 1.Univ Namur, Namur, Belgium; 2.Univ Lausanne, CH-1015 Lausanne, Switzerland; 3.CNRSM, Tunis, Tunisia; 4.Off Natl Mines, Tunis, Tunisia |
推荐引用方式 GB/T 7714 | Dekoninck, Augustin,Yans, Johan,Vennemann, Torsten,et al. delta D and delta O-18 Values of Halloysite-Kaolinite and Goethite-Hematite in the Fe Deposit of Tamra (N-W Tunisia): New Insights for Mixing Fluids during Ore Formation[C]:ASGA-ASSOC SCIENTIFIQUE GEOLOGIE & APPLICATIONS,2015:441-444. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。