Revision 1 1 2 Authigenic anatase nanoparticles as a proxy for sedimentary environment and 3 porewater pH 4 5

1 2 Authigenic anatase nanoparticles as a proxy for sedimentary environment and 3 porewater pH 4 5 Hanlie Hong1*, Kaipeng Ji1, Chen Liu1, Thomas J. Algeo2,3,4, Ke Yin1, Lulu Zhao1, Michael F. 6 Hochella Jr.5, Qian Fang1, Chaowen Wang6 7 8 1 School of Earth Sciences, China University of Geosciences, Wuhan 430074, China 9 2 State Key Laboratory of Biogeology and Environmental Geology, China University of 10 Geosciences, Wuhan 430074, China 11 3 State Key Laboratory of Geological Processes and Mineral Resources, China University of 12 Geosciences, Wuhan 430074, China 13 4 Department of Geology, University of Cincinnati, Cincinnati, OH 45221-0013, USA 14 5 Department of Geosciences, Virginia Tech, Blacksburg, VA 24061, USA 15 6 Gemological Institute, China University of Geosciences (Wuhan), Wuhan 430074, Hubei, China 16 17 *Corresponding author. Email: honghanlie@cug.edu.cn 18 19