Dolomite microstructures between 390° and 700 °C: Indications for deformation mechanisms and grain size evolution

Berger, Alfons; Ebert, Andreas W.; Ramseyer, Karl; Gnos, Edwin; Decrouez, Danielle

doi:10.1016/j.jsg.2016.06.001

Cited by 7 publications

(5 citation statements)

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“…Other researchers have reported similar results on the effects of elevated temperatures on the development and propagation of rocks' micro-cracks thereby reducing the strength of the rock (e.g. Cantisani et al, 2009;Ferrero, Migliazza, Spagnoli, & Zucali, 2014;Berger, Ebert, Ramseyer, Gnos, & Decrouez, 2016;Peng, Rong, Cai, Yao, & Zhou, 2016;Sirdesai, Singh, Ranjith, & Singh, 2017).…”

Section: Introductionmentioning

confidence: 56%

Effects of elevated temperature on physical and mechanical properties of carbonate rocks in South-Southern Nigeria

Idris¹

2018

Min. miner. depos.

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Purpose. Limestone and marble are carbonate rocks with several structural and engineering applications. The physical and mechanical properties of the rocks are fundamental as they determine their suitability for various use. Temperature is one of the critical factors that could affect the properties of the rocks and consequently their engineering application. Therefore, a better understanding of how the temperature, especially when it is higher than ambient, will affect the properties of the rocks is essential. In this work, the effects of the elevated temperature on some physical and mechanical properties of the carbonate rocks have been studied.Methods. Cubic samples of the rocks were prepared and heated in a furnace to different temperatures up to 900°C at an interval of 100°C and then cooled to the room temperature for testing. Porosity, dry density and uniaxial compressive strength (UCS) of the samples were determined under the effect of the elevated temperature. The porosity and dry density were determined using the saturation and buoyancy method while the UCS was estimated from the point load index tests performed on the samples.Findings. The results of this work indicate that the elevated temperature has significant effects on the physical and mechanical properties of the rocks. The porosity of the rocks showed an increasing trend as the temperature was increased while the density steadily decreased especially at the temperature above 300°C. The UCS of the rocks also declines with increased temperature but with an intermittent increase in their strength at a specific heating temperature.Originality. Most of the available studies on Nigerian carbonate rocks are focused on the estimation of physical and mechanical properties of the rocks without considering changes in these properties when the rocks are subjected to high temperatures. This study therefore aims to fill the gap by investigating the effects of the elevated temperatures on the physical and mechanical properties of some of the Nigerian carbonate rocks. Practical implications.The results of this study further increase understanding of the effect of high temperature on carbonate rocks, and also help to identify the critical temperature at which the properties of carbonate rocks undergo significant and irreversible changes. This information is very important for restoration of valuable fire-damaged structures made of carbonate rocks.

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Section: Introductionmentioning

confidence: 56%

Effects of elevated temperature on physical and mechanical properties of carbonate rocks in South-Southern Nigeria

Idris¹

2018

Min. miner. depos.

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“…1.2 andJolivet et al, 2015, 2021). The finer-grained dolomitic layers showing homeoblastic fabric, do not record this event for mechanical reasons, dolomite being stronger than calcite at this temperature (Kushnir et al, 2015;Berger et al, 2016). Anhydrous progressive metamorphic assemblages in marble (calcite, dolomite, diopside, grossular, spinel) and adjacent calcsilicate rocks (diopside-anorthite-calcite quartz) retrograded to hydrous mineral assemblage such as clinochlore, F-phlogopite, humite with decreasing temperature and increasing water activity.…”

Section: Discussionmentioning

confidence: 95%

Marble quarries in Delos Island (Greece): a geological characterization

Vettor

Sautter

Jolivet

et al. 2022

BSGF - Earth Sci. Bull.

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Traces of extraction in Delian marble quarries attest their exploitation during Antiquity. A preliminary non-destructive provenance study confirmed the presence of indigenous marble in Delos constructions. In contrast, Delos marble quarries have not been geochemically described so far. Therefore, a detailed (1/5000 scale) geological mapping and cross-sections were performed in the four Delian marble quarries in order to better determine their dimension and to estimate the volume of extracted marble. The surface of the quarries was revised into up to six times larger areas, increasing the extracted volume estimations. Quarries were sampled and studied with mineralo-petrographic (optical and electronic microscopy, X-Ray Diffraction) and isotopic (δ13C and δ18O) characterization. Three categories were observed, i.e., a coarse whitish to bluish marble, a fine yellowish dolomitic marble and marble with giant white and blue calcite crystals. The Maximum Grain Size associated with oxygen and carbon isotopic ratios showed a good potential to distinguish Delian marbles from most of the main Mediterranean marbles used during Antiquity. However, geochemical elemental analyses such as trace elements analysis could supplement Delian marble characterization which will benefit future provenance studies.

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“…Carrara marble bulk oxygen isotope value plot in the field of ‘normal’ marine values (Ferry et al ., ; Ritter et al ., ). The most likely interpretation is that of low porosity rock units with fluid to solid ratios being essentially that of a rock buffered system (Pingitore, ; Ritter et al ., ; Berger et al ., ). Temperature‐dependent oxygen isotope fractionation decays as 1/ T ‐squared rather than 1/ T at increasingly higher temperatures and approaches nil at around 300°C.…”

Section: Interpretation and Discussionmentioning

confidence: 97%

A lost Tethyan evaporitic basin: Evidence from a Cretaceous hemipelagic meta‐selenite – red chert association in the Eastern Mediterranean realm

et al. 2019

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Ancient evaporite deposits are geological archives of depositional environments characterized by a long-term negative precipitation balance and bear evidence for global ocean element mass balance calculations. Here, Cretaceous selenite pseudomorphs from western Anatolia ('Rosetta Marble')characterized by their exceptional morphological preservationand their 'marine' geochemical signatures are described and interpreted in a process-oriented context. These rocks recorded Late Cretaceous high-pressure/low-temperature, subductionrelated metamorphism with peak conditions of 1Á0 to 1Á2 GPa and 300 to 400°C. Metre-scale, rock-forming radiating rods, now present as fibrous calcite marble, clearly point to selenitic gypsum as the precursor mineral. Stratigraphic successions are recorded along a reconstructed proximal to distal transect. The cyclical alternation of selenite beds and radiolarian ribbon-bedded cherts in the distal portions are interpreted as a two type of seawater system. During arid intervals, shallow marine brines cascaded downward into basinal settings and induced precipitation. During more humid times, upwelling-induced radiolarian blooms caused the deposition of radiolarite facies. Interestingly, there is no comparable depositional setting known from the Cenozoic world. Meta-selenite geochemical data (d 13 C, d 18 O and 87 Sr/ 86 Sr) plot within the range of reconstructed middle Cretaceous seawater signatures. Possible sources for the 13 C-enriched (mean 2Á2&) values include methanogenesis, gas hydrates and cold seep fluid exhalation. Spatially resolved component-specific analysis of a rock slab displays isotopic variances between meta-selenite crystals (mean d 13 C 2Á2&) and host matrix (mean d 13 C 1Á3&). The Cretaceous evaporite-pseudomorphs of Anatolia represent a basin wide event coeval with the Aptian evaporites of the Proto-Atlantic and the pseudomorphs share many attributes, including lateral distribution of 600 km and stratigraphic thickness of 1Á5 to 2Á0 km, with the evaporites formed during the younger Messinian salinity crisis. The Rosetta Marble of Anatolia may represent the best-preserved selenite pseudomorphs worldwide and have a clear potential to act as a template for the study of meta-selenite in deep time. 2627

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Dolomite microstructures between 390° and 700 °C: Indications for deformation mechanisms and grain size evolution

Cited by 7 publications

References 53 publications

Effects of elevated temperature on physical and mechanical properties of carbonate rocks in South-Southern Nigeria

Effects of elevated temperature on physical and mechanical properties of carbonate rocks in South-Southern Nigeria

Marble quarries in Delos Island (Greece): a geological characterization

A lost Tethyan evaporitic basin: Evidence from a Cretaceous hemipelagic meta‐selenite – red chert association in the Eastern Mediterranean realm

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