Caratterizzazione petrografica e stato di conservazione delle pietre della facciata principale (N-NE) del Donjon romano di Loches (Turenna, Francia)  [Petrography and state of preservation of the main (N-NE) facade stones of the Roman tower (Donjon) of Loches, Touraine, France]

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Alternate Title:Petrography and state of preservation of the main (N-NE) facade stones of the Roman tower (Donjon) of Loches, Touraine, France
Authors:Antonelli, Fabrizio; Dessandier, David
Author Affiliations:Primary:
Universita di Urbino, Centro di Ricerca e Studio dei Beni Culturali Marchigiani, Urbino, Italy
Other:
Bureau de Recherches Geologique et Minieres, Orléans, France
Volume Title:Mineralogica et Petrographica Acta
Source:Mineralogica et Petrographica Acta, Vol.37, p.417-436. Publisher: Istituto di Mineralogia e Petrografia dell'Universita di Bologna, Bologna, Italy. ISSN: 0540-1437
Publication Date:1994
Note:In Italian with English summary. 17 refs.; illus., incl. 5 tables, sketch map
Summary:A detailed analysis of the state of preservation and the nature of the building material is reported for the Roman tower (donjon) of the city of Loches, France, built during the XI century. The stone of the main front of the tower is a silicified bioclastic calcimicrite referable to the middle Turonian Chalk; spherules of opal-CT are contained in macropores. This material has a high porosity (> 40%), leading to weak mechanical strength. [R.A.H.]
Subjects:Building stone; Calc-silicate composition; Carbonate rocks; Chemical composition; Construction materials; Degradation; Limestone; Mineral composition; Petrography; Physicochemical properties; Preservation; Sedimentary rocks; X-ray diffraction data; Europe; France; Touraine; Western Europe; Bourre Chalk; Loches France
Abstract Numbers:96M/346
Record ID:1997070699
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data supplied by CNR, Comitato Scienze Geologiche e Minerarie
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040 |a ViAlAGI  |c ViAlAGI 
041 |a ita  |b eng 
072 7 |a 06A  |2 georeft 
100 1 |a Antonelli, Fabrizio  |e analytic author  |u Universita di Urbino, Centro di Ricerca e Studio dei Beni Culturali Marchigiani, Urbino 
242 0 0 |a Petrography and state of preservation of the main (N-NE) facade stones of the Roman tower (Donjon) of Loches, Touraine, France 
245 1 0 |a Caratterizzazione petrografica e stato di conservazione delle pietre della facciata principale (N-NE) del Donjon romano di Loches (Turenna, Francia) 
300 |a p. 417-436 
500 |a In Italian with English summary. 17 refs. 
500 |a Abstract number: 96M/346 
500 |a Abstractor: R.A.H. 
500 |a Affiliation: Universita di Urbino, Centro di Ricerca e Studio dei Beni Culturali Marchigiani; Urbino; ITA; Italy 
500 |a Affiliation: Bureau de Recherches Geologique et Minieres; Orléans; FRA; France 
500 |a Key title: Mineralogica et Petrographica Acta 
500 |a Source note: Mineralogica et Petrographica Acta, Vol.37, p.417-436. Publisher: Istituto di Mineralogia e Petrografia dell'Universita di Bologna, Bologna, Italy. ISSN: 0540-1437 
500 |a Publication type: journal article 
504 |b 17 refs. 
510 3 |a GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom, Reference includes data supplied by CNR, Comitato Scienze Geologiche e Minerarie 
520 |a A detailed analysis of the state of preservation and the nature of the building material is reported for the Roman tower (donjon) of the city of Loches, France, built during the XI century. The stone of the main front of the tower is a silicified bioclastic calcimicrite referable to the middle Turonian Chalk; spherules of opal-CT are contained in macropores. This material has a high porosity (#GT 40%), leading to weak mechanical strength. 
650 7 |a Building stone  |2 georeft 
650 7 |a Calc-silicate composition  |2 georeft 
650 7 |a Carbonate rocks  |2 georeft 
650 7 |a Chemical composition  |2 georeft 
650 7 |a Construction materials  |2 georeft 
650 7 |a Degradation  |2 georeft 
650 7 |a Limestone  |2 georeft 
650 7 |a Mineral composition  |2 georeft 
650 7 |a Petrography  |2 georeft 
650 7 |a Physicochemical properties  |2 georeft 
650 7 |a Preservation  |2 georeft 
650 7 |a Sedimentary rocks  |2 georeft 
650 7 |a X-ray diffraction data  |2 georeft 
651 7 |a Europe  |2 georeft 
651 7 |a France  |2 georeft 
651 7 |a Touraine  |2 georeft 
651 7 |a Western Europe  |2 georeft 
653 |a Bourre Chalk 
653 |a Loches France 
700 1 |a Dessandier, David,  |e analytic author  |u Bureau de Recherches Geologique et Minieres, Orléans 
773 0 |t Mineralogica et Petrographica Acta  |d Bologna : Istituto di Mineralogia e Petrografia dell'Universita di Bologna, 1994  |x 0540-1437  |y MPTAAS  |n Mineralogica et Petrographica Acta, Vol.37, p.417-436. Publisher: Istituto di Mineralogia e Petrografia dell'Universita di Bologna, Bologna, Italy. ISSN: 0540-1437 Publication type: journal article  |g Vol. 37  |h illus., incl. 5 tables, sketch map