دورية أكاديمية
Brucite-Aragonite Precipitates as Weathering Products of Historic Non-MgO-Based Geomaterials
| العنوان: | Brucite-Aragonite Precipitates as Weathering Products of Historic Non-MgO-Based Geomaterials |
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| المؤلفون: | Martínez Martínez, Javier, Benavente, David, Fusi, Nicoletta, Cañaveras, Juan C. |
| المساهمون: | Universidad de Alicante. Departamento de Ciencias de la Tierra y del Medio Ambiente, Petrología Aplicada |
| بيانات النشر: | MDPI |
| سنة النشر: | 2020 |
| المجموعة: | RUA - Repositorio Institucional de la Universidad de Alicante |
| مصطلحات موضوعية: | Brucite, X-ray computed tomography, Speleothem, Stalactite, Geochemistry, Petrología y Geoquímica |
| الوصف: | This paper analyses the mineralogical composition, texture, and structure of a stalactite sampled from the city-wall storerooms of the Nueva Tabarca fortress (southeast Spain). This speleothem presents an uncommon mineral assemblage: aragonite, brucite, gypsum, silica, and halite. Internally, it shows complex structure: (1) a central soda-straw composed by aragonite; (2) an external puff-pastry cone-crust formed preferentially by aragonite and brucite; and (3) an internal branching of coralloids, showing a subtle layering between brucite and aragonite. Gypsum, halite, and silica locate in the outer coating of the cone-crust. The sequent mineral precipitation sequence has been established: aragonite > brucite > gypsum/silica > halite. Speleothem formation is directly related to the chemical weathering of the rocks and mortars used as building materials of the city-wall. Brucite precipitates has been always linked to the presence of MgO-based geomaterials. However, the lack of these compounds as building materials in Nueva Tabarca fortress makes this investigation a unique example of brucite precipitation. PHREEQC calculations showed that interaction between pore waters and the minerals of mortar aggregates (dolomite, pyroxene, and amphibole) leads to rich-magnesium solutions. Evaporation modelling of lixiviated waters describes the precipitation of the mineral assemblage of the brucite-aragonite speleothems. ; This research was funded by project GRE12-03 (University of Alicante). |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 2075-163X |
| العلاقة: | https://doi.org/10.3390/min10070599Test; Martínez-Martínez J, Benavente D, Fusi N, Cañaveras JC. Brucite-Aragonite Precipitates as Weathering Products of Historic Non-MgO-Based Geomaterials. Minerals. 2020; 10(7):599. doi:10.3390/min10070599; http://hdl.handle.net/10045/107930Test |
| DOI: | 10.3390/min10070599 |
| الإتاحة: | https://doi.org/10.3390/min10070599Test http://hdl.handle.net/10045/107930Test |
| حقوق: | © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0Test/). ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.32B99E12 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 2075163X |
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| DOI: | 10.3390/min10070599 |