Characterization of serpentinites to define their appropriate use as dimension stone

Pereira, Dolores; Yenes, Mariano; Blanco, José; Peinado, Mercedes

doi:10.1144/gsl.sp.2007.271.01.06

Cited by 25 publications

(22 citation statements)

References 9 publications

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“…Correct identification and characterization of serpentine minerals is important in many fields such as the Earth and environmental sciences as well as the health sciences. For example, serpentinites (rocks composed dominantly of serpentine minerals) are commonly used for building materials and crushed aggregate . Chrysotile, characterized by rolled TO layers and a cylindrical/fibrous habit, was widely used as asbestos in insulating and fire‐resistant materials.…”

Section: Introductionmentioning

confidence: 99%

Distinguishing the Raman spectrum of polygonal serpentine

Tarling

Rooney

Viti

et al. 2018

J Raman Spectroscopy

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Positively identifying serpentine mineral types is important for a wide range of disciplines in the Earth sciences and health sciences. Although Raman spectroscopy has been widely applied as a tool to distinguish four of the main serpentine minerals (i.e., antigorite, lizardite, chrysotile, and polygonal serpentine), some uncertainty remains as to whether all four varieties have unique Raman spectra. In this paper, submicron Raman spectroscopy mapping was performed directly on electron‐transparent regions of serpentine samples that were unambiguously identified by transmission electron microscopy (TEM). The increased spatial resolution of the Raman mapping technique (~370 nm), combined with the detailed characterization provided by TEM, indicates that polygonal serpentine has the same Raman spectrum as lizardite and therefore cannot be spectrally distinguished from lizardite. Furthermore, the Raman spectral profile that has previously been reported as unique to polygonal serpentine is likely to represent a mixture of chrysotile and polygonal serpentine/lizardite. To positively discriminate between lizardite and polygonal serpentine requires TEM investigation.

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Section: Introductionmentioning

confidence: 99%

Distinguishing the Raman spectrum of polygonal serpentine

Tarling

Rooney

Viti

et al. 2018

J Raman Spectroscopy

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“…Approximately 5 % of Galicia (Spain) is covered by serpentinitic areas; these sites were formerly quarries from which materials for roads, ballast for railway, and ornamental rock were extracted (Pereira et al, 2007). The tailings left behind are often a source of contamination.…”

Section: Introductionmentioning

confidence: 99%

Cobalt, chromium and nickel contents in soils and plants from a serpentinite quarry

et al. 2015

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Abstract. The former serpentinite quarry of Penas Albas (Moeche, Galicia, NW Spain) left behind a large amount of waste material scattered over the surrounding area, as well as tailing areas. In this area several soils were studied together with the vegetation growing spontaneously over them with the aim of identifying the bioavailability of heavy metals. The potential of spontaneous vegetation for phytoremediation and/or phytostabilization was evaluated. The pH of the soils ranges from neutral to basic, with very low organic matter and nitrogen contents. There are imbalances between exchangeable cations like potassium (K) and calcium (Ca), mainly due to high magnesium (Mg) content that can strongly limit plant production. Moreover, in all of the studied soils there are high levels of cobalt (Co), chromium (Cr) and nickel (Ni) ( >70, >1300 and >1300 mg kg −1 , respectively). They exceed the intervention limits indicated by soil guideline values. Different soil extractions were performed in order to evaluate bioavailability. CaCl 2 0.01 M is the most effective extraction reagent, although the reagent that best predicts plant availability is a mixture of low molecular weight organic acids. Festuca rubra, L. is the spontaneous plant growing in the soils that accumulates the highest amount of the metals, both in shoot and roots. Festuca also has the highest translocation factor values, although they are only > 1 for Cr. The bioconcentration factor is > 1 in all of the cases, except in the shoot of Juncus sp. for Co and Ni. The results indicate that Festuca is a phytostabilizer of Co and Ni and an accumulator of Cr, while Juncus sp. is suitable for phytostabilization.

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“…In the 0.10-0.20 m layer, soil Si contents did not fit any mathematical model, presenting a mean of 16.42 mg dm -3 ( Figure 1E). Pereira et al (2007) point out that Si presents low mobility in the soil, which may explain the higher levels in the layer where the serpentinite was added.…”

Section: Soil Chemical Attributesmentioning

confidence: 95%

Chemical Attributes of Soil and Response of Wheat to Serpentinite in Direct Seeding System

Alovisi¹,

Mauad²,

Alovisi³

et al. 2019

JAS

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The serpentinite is an alternative for the correction of soil acidity and is composed of calcium and magnesium silicate. The objective of this study was to evaluate the residual effect of the serpentinite application on soil chemical attributes and the effects on wheat crop productivity in a no-tillage system. The experimental design was a randomized block design, in a subdivided plot scheme, with four replications. The plots were constituted by serpentinite doses (0, 2, 4, 8 and 16 Mg ha-1) and in the subplots the soil collection layers (0.0-0.10 and 0.10-0.20 m). The chemical attributes of the soil evaluated at 41 months after the application of serpentinite, presented favorable results of the residual power of this corrective. The main results observed are related to the increase of pH, decrease of aluminum content and potential acidity, and increase of Ca, Mg and Si contents, cation exchange capacity (CTC) and base saturation. The residual of the serpentinite in the soil contributed with an improvement in the chemical attributes of the soil, which favored the increase of the dry mass, number of spikes and yield of the wheat crop.

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Characterization of serpentinites to define their appropriate use as dimension stone

Cited by 25 publications

References 9 publications

Distinguishing the Raman spectrum of polygonal serpentine

Distinguishing the Raman spectrum of polygonal serpentine

Cobalt, chromium and nickel contents in soils and plants from a serpentinite quarry

Chemical Attributes of Soil and Response of Wheat to Serpentinite in Direct Seeding System

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