The endothermic peak at 663 c indicates the decomposition of the crystal lattice of serpentine in the case of the serpentine powder before thermal treatment dta 1, and it is absent for the serpentine powder after the thermal. Based on the observed relationships between serpentine structures and dtgdta dehydroxylation temperatures, thermal analysis may represent a useful tool. The msh phase present in sample is connected with minerals from serpentine group, which can be treated as a product of transformation of the msh phase in hydrothermal conditions. Serpentine minerals discrimination by thermal analysis. Summary of the main characteristics of zildats serpentinites tso morari, himalaya. The result is very suggestive that differential thermal gravimetric dtg analysis can measure the content of chrysotile distinguished from the other serpentine minerals effectively when they. Typical tgdsc curves of serpentine minerals were shown in fig. Eckelmann 154 studies of the substitution of ohby fin various hydroxylic minerals download the scanned pdf. For serpentine, mass loss was observed in two primary regions.
They often occur as finegrained admixtures and can be difficult to distinguish within a rock. Pdf lithological discrimination using aster and sentinel. Phase behavior of serpentine mineral by carbothermal reduction nitridation. The mechanism of decomposition of serpentines from. Decomposition of the layer structure of serpentine minerals sample as well as serpentine chlorite minerals samples 12, 15 is connected with the endothermic.
Microwave heating of magnesium silicate minerals sciencedirect. Possible serpentine relicts in lunar meteorites springerlink. The term asbestos is a generic designation referring usually to six types of naturally occurring mineral fibers that are or have been commercially exploited. Serpentine, any of a group of hydrous magnesiumrich silicate minerals. Kinetics of the chrysotile and brucite dehydroxylation. Pdf lithological discrimination using aster and sentinel2a. Pdf the thermophysical properties of serpentinite researchgate. Dissolutionreprecipitation and selfassembly of serpentine. Viti c 2010 serpentine minerals discrimination by thermal analysis. Yb hree is used to discriminate the primary minerals.
Request pdf serpentine minerals discrimination by thermal analysis this paper reports a complete set of tg, dtg, and dta data, coupled with emitted gas analysis, for wellconstrained, almost. Abstract the efiects of particle size of chrysotile and platy serpentine on the difierential thermal. No major iron contaminations were observed after thermal treatments according to chemical analysis. Correspondence between h2o reported in chemical analysis and that found by dehydration studies. Optical, dta, and xray data for eleven chlorite samples of clinochlore. Chemical differences among the serpentine california. Serpentine is a group of minerals that are usually green in color. Thermal decomposition of serpentine during coseismic. In the dsc curve, a broad endothermal peak from 300 to 700 c manifested the dehydroxylation reaction, whilst an exothermal peak centred around 750 c demonstrated a phase change, i. Surface instability of serpentine in aqueous suspensions. Mineral carbonation is known to be among the most efficient ways to reduce the anthropogenic emissions of carbon dioxide. Pdf in this article serpentinite from banovina, croatia, was studied.
Mineralienatlas lexikon antigorite english version. Pdf tgdsc study of the thermal behaviour of hazardous mineral. Solid products were characterized by differential thermal analysis dta and. Conversion of serpentine to smectite under hydrothermal condition. May 05, 2017 thermal decomposition of serpentine was studied by thermal analysis system. Thermalanalysis curves of serpentinegroup minerals obtained by the static method. Serpentine group minerals have similar physical properties and form by similar processes. Conversion of serpentine to smectite under hydrothermal. Serpentine minerals discrimination by thermal analysis cecilia viti. Serpentine minerals discrimination by thermal analysis in. Mar 01, 2014 read dehydroxylation of serpentine minerals. Thermal analysis data obtained by the static method on minerals of the serpentine group.
Free fulltext pdf articles from hundreds of disciplines, all in one place airborne concentrations of chrysotile asbestos in serpentine quarries and stone processing facilities in valmalenco, italy pdf. Soil science society of america book series books in the series are available from the soil science society of america, 677 south segoe road, madison, wi 53711 usa. If so, heating of the noa samples to a moderate temperature in a muffle. The various serpentine mineral structures have been refined in the mineralogy. A way to improve yield is to thermally activate serpentine minerals prior. The resulting pdf is a map of the interatomic distances in the sample. Dec 10, 20 read influence of calcium carbonate on the decomposition of asbestos contained in endoflife products, thermochimica acta on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Comer 3 discordant upb ages and mineral type download the scanned pdf. As a result of temperature increase in the subducting oceanic lithosphere, thermal decomposition of serpentine minerals and new mineral formations have a great effect on geologic processes related. Surface instability of serpentine in aqueous suspensions article in journal of colloid and interface science 2311.
The effect of particle size on the thermal properties of. Nanostructures and mineral reactions, journal of structural geology on deepdyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips. Multianalytical approach for identifying asbestos minerals. Thermal diffusivity, thermal conductivity and heat capacity. The discrimination of the all serpentine varieties using only pxrf was not possible due to the negligible chemical differences between serpentine phases. Thermal and infrared studies of garnierite from the soroako. Presently, the energy cost and technological complications, required to amorphise serpentine minerals by dehydroxylationprevent their largescale application for. The thermal diffusivity and conductivity decrease with increasing temperature. Oct 01, 2010 read thermal decomposition of serpentine during coseismic faulting. Electron diffraction studies of serpentine minerals download the scanned pdf. Based on the observed relationships between serpentine structures and dtgdta dehydroxylation temperatures, thermal analysis may represent a useful tool for serpentine identification, particularly in the case of natural massive samples where different varieties are mutually intermixed. Serpentine minerals discrimination by thermal analysis ce c ilia viti dipartimento di scienze della terra, university of siena, via laterina 8, 53100 siena, italy abstra c t this paper reports a complete set of tg, dtg, and dta data, coupled with emitted gas analysis, for wellconstrained, almost pure serpentine samples.
Data obtained with chrysotile and platy serpentine on a thermal increment diffractometer are given. Trace element analyses hrlaicpms of serpentine minerals after olivine or pyroxene, and iron. Ceciliaserpentine minerals discrimination by thermal analysis. The effect of particle size on the thermal properties of serpentine minerals erw. Pdf quantitative determination of chrysotile in massive. Minerals free fulltext mineralogical transformations of. Oct 30, 20 the effect of thermal treatment at different temperatures ranging from 400 to 1,260 c for 2 h on the above mentioned serpentinite samples was characterized by thermal analysis, xray diffraction, and chemical analysis. In situ characterization of serpentinites from forearc mantle wedges. Geologists usually call these materials serpentine rather than more specific names to simplify communication. Article pdf available in journal of thermal analysis and calorimetry august 2015 with 495 reads. The serpentinegroup minerals usgs publications repository. However, mineralogical signs of aqueous alteration of lunar minerals have not been found yet.
From the village and its surroundings, we collected eight serpentinitederived soil samples and carried out differential scanning calorimetry dsc, derivative. Serpentine minerals are a group of phyllosilicates, which belong to one of the seven classifications of clay minerals, that is, the kaolin serpentine group with 1. A lowtemperature study using rietveld refinement of neutron diffraction data american mineralogist 81 1996, 11111116. Emmons, ebenezer, 1826, manual of mineralogy and geology. Serpentine minerals mg3si2o5oh4, have shown great potential for carbonation. Dtatga were also obtained on a brucitecarbonate sample indicating particle size has a similar effect on its endothermic reactions but it is not as large as those noted for the serpentine minerals. Serpentine minerals are a group of phyllosilicates. The hight mineral assemblage is always represented by forsterite and enstatite. Minerals free fulltext mineralogical transformations. Influence of hydrothermal conditions on the phase composition. Heat transport properties of serpentine minerals highly depend on their water content. A study of thermal decomposition of antigorite from dunite.
Thermal decomposition of serpentine during coseismic faulting. Serpentine minerals discrimination by thermal analysis nasaads. Thermal diffusivity and thermal conductivity of serpentine antigorite were measured up to 8. Hydrogen positions and thermal expansion in lizardite1t from elba. Based on the observed relationships between serpentine structures and dtg dta dehydroxylation temperatures, thermal analysis may represent a useful tool. Advanced mineralogy vol 1 composition, structure, and. Volume 95 issue 4 american mineralogist geoscienceworld. Chrysotile, antigorite, and lizardite are three of the primary serpentine minerals. Thermal and infrared studies of garnierite from the soroako nickeliferous laterite deposit, sulawesi, indonesia doi. Sep 19, 2017 a study of thermal decomposition of antigorite from dunite and lizardite from peridotite. Analysis of serpentine polymorphs in investigations of natural. Geologicol suruey, menlo park, california arsrrlcr existing wet chemical analyses and structural studies of the serpentine minerals, chrysotile, iizardite, and antigorite suggest that these minerals have different chemical composi. The mechanism of decomposition of serpentines from peridotites on heating. Nanostructures and mineral reactions article in journal of structural geology 3210.
569 1268 1388 1308 884 1472 1418 1032 1502 452 1362 770 290 438 276 478 1131 675 396 1395 1492 366 654 272 700 526 763 1044 958 752 906 42 721 1 630 353 764 1471 645 78 1349 1368 1232 1310 84 1227 328 214