1986
DOI: 10.1139/e86-163
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Black shale heaving at Sainte-Foy, Quebec, Canada

Abstract: Oxidation of pyrite and crystallization of sulphate minerals in rock fractures have locally produced ground heaving in excess of 10 cm in the foundations of a college at Sainte-Foy, near Québec (Quebec). Black shales of the Sainte-Foy Formation are involved; they contain about 2% disseminated framboidal pyrite and 3% calcite. Reaction products identified with a scanning electron microscope (SEM) equipped with an energy-dispersive X-ray chemical analyser (EDXA) are iron hydroxides and numerous sulphate minerals… Show more

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Cited by 48 publications
(7 citation statements)
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“…The presence of pyrite (FeS ) has been observed in Appalachian metasediments (Sassano and Schrijver, 1989; and in the NSF-R7 drilled well of this study) and in the Utica and Lorraine shales (Bérubé et al, 1986), confirming the formation of Fe sulfides in the region during the Paleozoic. Mn nodules from the Ordovician were found in the Appalachians, close to the study area, in the St. Daniel Fm.…”
Section: Origin and Evolution Of Trace Elements In Rocks And Their Resupporting
confidence: 75%
“…The presence of pyrite (FeS ) has been observed in Appalachian metasediments (Sassano and Schrijver, 1989; and in the NSF-R7 drilled well of this study) and in the Utica and Lorraine shales (Bérubé et al, 1986), confirming the formation of Fe sulfides in the region during the Paleozoic. Mn nodules from the Ordovician were found in the Appalachians, close to the study area, in the St. Daniel Fm.…”
Section: Origin and Evolution Of Trace Elements In Rocks And Their Resupporting
confidence: 75%
“…The correlation between minerals composition and porosity evolution is an essential topic for black oxidation process. A series of minerals reactions change the shale porosity, in turn, the evolution of porosity, especially the "active" pores -enable oxygen and uids ow into -determine the uid-rock reactions areas and control the kinetic rate of minerals reactions [3,4,12,[30][31][32][33][34][35][36]. Previous studies have well established the minerals-porosity correlations based on the chemical oxidation mechanism, but as a basic oxidation mechanism, the role of biological effect is seldom to report.…”
Section: Discussionmentioning
confidence: 99%
“…Although this pressure has not yet been measured directly under laboratory conditions, as summarized in Table 1, various workers have back-calculated values from site measurements and other tests. The results presented by Bérubé et al (1986) and Quigley & Vogan (1970) are back-calculated from damage seen on sites in Canada, where the material was pyritic bedrock. The value presented by Maher et al (2011) is from a test carried out with Irish mudrocks re-compacted into a concrete tube, and is the value estimated to be required to cause cracking of the tube as seen during testing.…”
Section: The Pyrite Reaction Processmentioning
confidence: 99%