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المؤلفBrauchli, Marisa
المؤلفMcKenzie, Judith
المؤلفStrohmenger, Christian
المؤلفSadooni, Fadhil
المؤلفVasconcelos, Crisógono
تاريخ الإتاحة2018-04-03T08:27:53Z
تاريخ النشر2015-09-24
اسم المنشورCarbonates and Evaporites
الاقتباسBrauchli, M., McKenzie, J.A., Strohmenger, C.J. et al. Carbonates Evaporites (2016) 31: 339. https://doi.org/10.1007/s13146-015-0275-0
الرقم المعياري الدولي للكتاب0891-2556
معرّف المصادر الموحدhttp://hdl.handle.net/10576/6506
الملخصThe Dohat Faishakh sabkha in Qatar is one of the rare modern environments where it is possible to study the formation of dolomite, a mineral whose origin has been long debated. In previous studies, dolomite formation in this area was considered to be the result of a penecontemporaneous replacement of aragonite, occurring in the presence of Mg-rich evaporated pore-waters. However, a re-investigation of the sabkha revealed that dolomite is not forming exclusively under the evaporitic conditions that characterize the supratidal zone, but also in microbial mats that colonize the lower intertidal zone, indicating that evaporated pore-waters are not a strict requirement for the mineralization process. Moreover, in the supratidal zone, portions of the sediment that are rich in dolomite are also relatively richer in organic material, which derives from partially degraded microbial mats buried in the sediments. Extracellular polymeric substances (EPS) that constitute microbial mats are recognized as an important component for the formation of Mg-rich carbonates. The presence of living and decaying microbial mats comprising EPS, rather than a replacement process, may be the key factor for dolomite formation in the Dohat Faishakh sabkha.
راعي المشروعSwiss National Science Foundation
اللغةen
الناشرSpringer Verlag
الموضوعDolomite
Microbial mat
Exopolymeric substances
Biomineral
Evaporites
Sabkha
العنوانThe importance of microbial mats for dolomite formation in the Dohat Faishakh sabkha, Qatar
النوعArticle
الصفحات339–345
رقم العدد3
رقم المجلد31
ESSN1878-5212
dc.accessType Open Access


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