Groundwater mixing at fracture intersections triggers massive iron-rich microbial mats

Olivier Bochet1, Tanguy Le Borgne2, Lorine Bethencourt3, Luc Aquilina4, Alexis Dufresne5, Mathieu Pédrot2, Julien Farasin2, Benjamin W Abbott6, Thierry Labasque7, Eliot Chatton2, Nicolas Lavenant8 and Christophe Petton9, (1)Indian Institute of Technology Kharagpur, Kharagpur, India, (2)University of Rennes 1, Géosciences Rennes UMR 6118, Rennes, France, (3)University of Rennes 1, OSUR, Rennes, France, (4)Géosciences Rennes, UMR CNRS 6118 - Université Rennes 1, Rennes Cedex, France, (5)CNRS, Ecobio UMR 6553, Rennes, France, (6)Brigham Young University, Department of Plant and Wildlife Sciences, Provo, United States, (7)CNRS, Paris Cedex 16, France, (8)Geosciences Rennes, CNRS, Rennes Cedex, France, (9)Univ Rennes, CNRS, Géosciences Rennes – UMR 6118, Rennes, France