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| Titel |
Linking rock fabric to fibrous mineralisation: a basic tool for the asbestos hazard |
| VerfasserIn |
G. Vignaroli, F. Rossetti, G. Belardi, A. Billi |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 5 ; Nr. 11, no. 5 (2011-05-09), S.1267-1280 |
| Datensatznummer |
250009409
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| Publikation (Nr.) |
 copernicus.org/nhess-11-1267-2011.pdf |
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| Zusammenfassung |
| In recent years, many studies have addressed the effect on human
health caused by asbestos exposures. As asbestos is a group of
fibrous minerals that mainly occurs in mafic and ultramafic rocks
(ophiolitic sequences), a close relationship between asbestos occurrence and
the geological history of host rocks should be expected. By reviewing the
existing literature and presenting characteristic examples, it is proposed a
direct correspondence exists between the presence of fibrous minerals in
ophiolites and the rock fabric systematics due to the combined activity of
deformation, metamorphism/metasomatism, and rock/fluid interaction.
Understanding the geological factors that may be at the origin of
the nucleation/growth of fibrous minerals constitutes a necessary
requirement for developing a methodological and analytical procedure
to evaluate asbestos hazard (AH) in the
natural prototype (ophiolitic rocks). A parameterisation of the
AH in function of the main geological processes that produce
the rock fabric systematics in different tectonic/geodynamic settings is
discussed. A geological multidisciplinary approach (based on
geological-structural field evidence combined with textural, mineralogical,
petrological, and geochemical investigations) is proposed as the
prerequisite for the evaluation of AH in natural
environments. This approach, in particular, can provide a robust
basis to formulate a procedural protocol finalised to the mitigation of
asbestos effects in environments where these effects are still a
real threat. |
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