国家重点基础研究发展计划项目编号:2012CB821900、国家自然科学基金批准号:41572013,41572021和财政部、国土资源部地质遗迹保护项目资助.This work was supported by the Major Basic Research Projects of MST of China No.2012CB821900,the National Natural Science Foundation of China Nos.41572013,41572021 and the Conservation Program of the Geological Heritage Sites of the Ministry of Finance and the Ministry of Land and Resources,People's Republic of China.