Upper ocean redox reconstructions of the Late Ordovician (Hirnantian) positive carbon isotope excursion: potential linkages to glaciation and mass extinction

Wanyi Lu1, Maya Elrick2, Menghan Li3, Dongping Hu3, Ruliang He1, André Desrochers4, Yanan Shen3 and Zunli Lu1, (1)Syracuse University, Syracuse, NY, United States, (2)University of New Mexico Main Campus, Albuquerque, NM, United States, (3)University of Science and Technology of China, Hefei, China, (4)University of Ottawa, Ottawa, ON, Canada