Washington University in St. Louis, Department of Earth and Planetary Sciences Campus Box 1169, EPSc Room 110 1 Brookings Drive, St. Louis, MO 63130-4899, United States
Washington University in St. Louis, Department of Earth and Planetary Sciences Campus Box 1169, EPSc Room 110 1 Brookings Drive, St. Louis, MO 63130-4899, United States
Washington University in St. Louis, Department of Earth and Planetary Sciences Campus Box 1169, EPSc Room 110 1 Brookings Drive, St. Louis, MO 63130-4899, United States
Washington University in St. Louis, Department of Earth and Planetary Sciences Campus Box 1169, EPSc Room 110 1 Brookings Drive, St. Louis, MO 63130-4899, United States
Pennsylvania State University, Department of Geosciences 446 Deike Building, University Park, PA 16802, United States
Pennsylvania State University, Department of Geosciences 446 Deike Building, University Park, PA 16802, United States
University of Yaounde I, Department of Physics Faculty of Science P.O. Box 812, Yaounde, 00000, Cameroon
University of Yaounde I, Department of Physics Faculty of Science P.O. Box 812, Yaounde, 00000, Cameroon
The Institute for Geological and Mining Research (IRGM), P.O. Box 4110, Yaounde, 00000, Cameroon
The Institute for Geological and Mining Research (IRGM), P.O. Box 4110, Yaounde, 00000, Cameroon