Mineralogical variability in weathering microsystems of a granitic outcrop of Galicia (Spain)

Calvo, R.; Garcı́a-Rodeja, Eduardo; Macı́as, Felipe

doi:10.1016/0341-8162(83)90033-4

Cited by 13 publications

(3 citation statements)

References 15 publications

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“…Carbonate is supplied from marine sources. Framework silicates, chlorite and muscovite are present within basinal bedrock sources (Calvo et al, 1983;Dallmeyer et al, 1997;Llana-Fúnez and Marcos, 2001). Kaolinite is likely to result from the weathering of basinal bedrock (Deer et al, 1992;Wilson, 1998;Fernández-Caliani et al, 2010).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Sedimentary controls on modern sand grain coat formation

Dowey

Worden

Utley

et al. 2017

Sedimentary Geology

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Section: Accepted Manuscriptmentioning

confidence: 99%

Sedimentary controls on modern sand grain coat formation

Dowey

Worden

Utley

et al. 2017

Sedimentary Geology

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“…This paper evaluated the influence of three different wavelengths (355 nm-third harmonic; 532 nm-second harmonic; and 1064 nm-fundamental radiation), in terms of damage caused to the granite-forming minerals, during laser cleaning by a QS Nd:YAG to extract a SAB. A naturally biocolonized pre-Hercynian Vilachán granite with a certain level of natural weathering, indicated by a crackled coating rich in Al and Si identified as kaolinite [40,41] and Fe-rich segregations on the surface and fissures, was selected. Note that the presence of this Fe-rich segregation is responsible for the yellowish coloration of this granite [26,28].…”

Section: Discussionmentioning

confidence: 99%

Influence of the Laser Wavelength on Harmful Effects on Granite Due to Biofilm Removal

et al. 2020

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The colonization of stone-built monuments by different organisms (algae, fungi, lichens, bacteria, and cyanobacteria) can lead to biodeterioration of the stone, negatively affecting the artistic value of the heritage. To address this issue, laser cleaning has been widely investigated in recent years, due to the advantages it offers over traditional mechanical and chemical methods: it is gradual, selective, contactless, and environmentally friendly. That said, the laser parameters should be optimized in order to avoid any by-effects on the surface as a result of overcleaning. However, as the adjustment of each parameter to clean polymineralic stones is a difficult task, it would be useful to know the effect of overcleaning on the different forming minerals depending on the wavelength used. In this paper, three different wavelengths (355 nm, 532 nm, and 1064 nm) of a Q-Switch neodymium-doped yttrium aluminum garnet (Nd:Y3Al5O12) laser, commonly known as QS Nd:YAG laser were applied to extract a naturally developed sub-aerial biofilm from Vilachán granite, commonly used in monuments in the Northwest (NW)Iberian Peninsula. In addition to the removal rate of the biofilm, the by-effects induced for fluences higher than the damage threshold of the stone were evaluated using stereomicroscopy, color spectrophotometry, and scanning electron microscopy with energy-dispersive x-ray spectroscopy. The results showed that different removal rates were obtained depending on the wavelength used and 532 nm obtained the highest removal level. In terms of by-effects, biotite melting was registered on all surfaces regardless of the wavelength. In addition, 532 nm seemed to be the most aggressive laser system, inducing the greatest change in appearance as a result of extracting the kaolinite crackled coating and the segregations rich in Fe, which are a result of natural weathering. These changes were translated into colorimetric changes visible to the human eye. The surfaces treated with 355 nm and 1064 nm showed lower surface changes.

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“…A series of physicochemical parameters were defined to evaluate the quality of the soil for the correct development of the vine by assigning critical values based on the Soil Fertility Capability Classification (SFCC) model [47] and adapted for Galicia [48][49][50] with some modifications for vineyard soils.…”

Section: Limiting Factors For Vine Developmentmentioning

confidence: 99%

Risk Assessment and Limiting Soil Factors for Vine Production—Cu and Zn Contents in Vineyard Soils in Galicia (Rías Baixas D.O.)

et al. 2023

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Characteristics of vineyard soils and management practices can be assessed to determine the soil trend evolution, risks, and limits of soils for vine production through soil factors and foliar diagnosis. This study was made with soils from a vineyard divided into two plots belonging to the Rías Baixas D.O. The vineyard soils were sampled and characterized for three years. The total and available Cu and Zn contents and the physicochemical characteristics of the soils were determined annually and every four months, respectively. The main objective was to assess edaphic properties, phytosanitary treatments, fertilization, and tillage applied to indicate the quality of the vineyard soils. The soils presented certain limitations associated with mechanization, trafficability, and ease of tillage for cultivation. The soils showed a sandy loam texture, which makes the application of compost necessary to improve water retention and cation exchange capacity. Phytosanitary treatments and fungicides caused phytotoxic contents of Cu and Zn in the soils without being detrimental to the vines. In conclusion, the edaphic factors and foliar analysis were adequate to evaluate the condition of the soils and vines and to establish the necessary measures to improve the edaphic conditions of the vineyard soils to improve plant production.

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Mineralogical variability in weathering microsystems of a granitic outcrop of Galicia (Spain)

Cited by 13 publications

References 15 publications

Sedimentary controls on modern sand grain coat formation

Sedimentary controls on modern sand grain coat formation

Influence of the Laser Wavelength on Harmful Effects on Granite Due to Biofilm Removal

Risk Assessment and Limiting Soil Factors for Vine Production—Cu and Zn Contents in Vineyard Soils in Galicia (Rías Baixas D.O.)

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