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

Olivier Bochet1, Tanguy Le Borgne2, Lorine Bethencourt3, Luc Aquilina4, Alexis Dufresne5, Mathieu Pédrot6, Julien Farasin3, Benjamin W Abbott7, Thierry Labasque8, Eliot Chatton6, Nicolas Lavenant2 and Christophe Petton9, (1)University of Rennes, Rennes Cedex, France, (2)Geosciences Rennes, Rennes Cedex, 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)University of Rennes 1, Géosciences Rennes UMR 6118, Rennes, France, (7)Brigham Young University, Provo, UT, United States, (8)CNRS, Paris Cedex 16, France, (9)UMR CNRS 6118, University of Rennes 1, Géosciences Rennes, Rennes, France