About the Authors

Zhongzhi Han

Affiliations Information College, Qingdao Agricultural University, Qingdao, China, School of Geosciences, China University of Petroleum Huadong, Qingdao, China

Jianhua Wan

wjh66310@163.com.cn

Affiliation School of Geosciences, China University of Petroleum Huadong, Qingdao, China

Limiao Deng

Affiliation Information College, Qingdao Agricultural University, Qingdao, China

Kangwei Liu

Affiliation School of Geosciences, China University of Petroleum Huadong, Qingdao, China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ZH. Performed the experiments: JW KL. Analyzed the data: ZH. Contributed reagents/materials/analysis tools: ZH. Wrote the paper: LD KL.