{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,4]],"date-time":"2025-11-04T10:38:59Z","timestamp":1762252739802,"version":"3.40.5"},"reference-count":36,"publisher":"Geological Society of London","issue":"1","license":[{"start":{"date-parts":[[2018,5,8]],"date-time":"2018-05-08T00:00:00Z","timestamp":1525737600000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-002"}],"content-domain":{"domain":["www.lyellcollection.org"],"crossmark-restriction":true},"short-container-title":["SP"],"published-print":{"date-parts":[[2019,7,9]]},"abstract":"<jats:title>Abstract<\/jats:title>\n          <jats:p>This research aims to quantify the geophysical signature of the laminated layer, one of the main layers constituting the weathering profile of hard rocks. This laminated layer acts as a marker for locating the underlying groundwater productive stratiform fractured layer (SFL). The study is based at two sites on the interpretation of 50 km of electrical resistivity tomography (ERT) profiles, compared with outcrops and boreholes by geophysical modelling. For the first time, the geophysical signature of the laminated layer, located at the base of the saprolite, is characterized within granite formations. Where the stratiform weathered layer is detected by pole-dipole ERT profiles, the laminated layer is identified as a resistant layer on 90% of the SFL length using an appropriate inversion method. In addition, this layer is also revealed for the first time in certain types of metamorphic formations; here it is revealed in micaschists (62% of the SFL length). The location of the laminated layer in the weathering profile is important (1) for water well siting by determining if an underlying SFL exists in the weathering profile and (2) for assessing the residual thickness of the saprolite, and then evaluating water storage and the protection of the SFL aquifer.<\/jats:p>","DOI":"10.1144\/sp479.7","type":"journal-article","created":{"date-parts":[[2018,5,8]],"date-time":"2018-05-08T11:05:42Z","timestamp":1525777542000},"page":"187-205","update-policy":"https:\/\/doi.org\/10.1144\/crossmark-policy","source":"Crossref","is-referenced-by-count":21,"title":["Characterization and location of the laminated layer within hard rock weathering profiles from electrical resistivity tomography: implications for water well siting"],"prefix":"10.1144","volume":"479","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4773-3987","authenticated-orcid":false,"given":"Pierre","family":"Belle","sequence":"first","affiliation":[{"name":"Water Institute by Evian, Danone Waters, Evian-Volvic World, 11, Avenue du G\u00e9n\u00e9ral Dupas, BP87 \u2013 74503, Evian-les-Bains Cedex, France"}]},{"given":"Patrick","family":"Lachassagne","sequence":"additional","affiliation":[{"name":"Water Institute by Evian, Danone Waters, Water Resources and Sustainability Team, 11, Avenue du G\u00e9n\u00e9ral Dupas, BP87 \u2013 74503, Evian-les-Bains Cedex, France"}]},{"given":"Francis","family":"Mathieu","sequence":"additional","affiliation":[{"name":"BRGM, Risk and Prevention Division, 3 Avenue Claude Guillemin, Orl\u00e9ans, France"}]},{"given":"Christine","family":"Barbet","sequence":"additional","affiliation":[{"name":"Water Institute by Evian, Danone Waters, Evian-Volvic World, 11, Avenue du G\u00e9n\u00e9ral Dupas, BP87 \u2013 74503, Evian-les-Bains Cedex, France"}]},{"given":"Nicolas","family":"Brisset","sequence":"additional","affiliation":[{"name":"BRGM, Direction R\u00e9gionale Guyane, Domaine de Suzini \u2013 Route de Montabo, 97333 Cayenne, France"}]},{"given":"Jean-Christophe","family":"Gourry","sequence":"additional","affiliation":[{"name":"BRGM, Risk and Prevention Division, 3 Avenue Claude Guillemin, Orl\u00e9ans, France"}]}],"member":"1881","published-online":{"date-parts":[[2018,5,8]]},"reference":[{"key":"e_1_3_2_2_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.jafrearsci.2017.12.007"},{"key":"e_1_3_2_3_1","first-page":"13","article-title":"Recent progress in the geological and hydrogeological interpretation of ERT profiles in granitic and metamorphic crystalline rocks \u2013 Nouvelles avanc\u00e9es dans l'interpr\u00e9tation g\u00e9ologique et hydrog\u00e9ologique des profils de tomographie \u00e9lectrique en contexte de socle granitique et m\u00e9tamorphique (in French)","volume":"191","author":"Belle P.","year":"2016","unstructured":"BelleP., LachassagneP., MathieuF., BarbetC. & BonnevalF. 2016. 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