Origin of Mg-rich clay minerals in the first member of Maokou Formation in the middle Permian in the Central and Southern Sichuan Basin (China) and their implications on supergene and hypogene fluid regimes

• Wancang Tan ,

  Contributed equally to this work with: Wancang Tan, Xiandong Wang

  Roles Resources

  ¶☯ These authors contributed equally to this work.

  Affiliation Research Institute of Exploration and Development, Petrochina Daqing Oilfield Company, Daqing, Heilongjiang, China

  ⨯
• Xiandong Wang ,

  Contributed equally to this work with: Wancang Tan, Xiandong Wang

  Roles Investigation, Methodology

  ¶☯ These authors contributed equally to this work.

  Affiliation Research Institute of Exploration and Development, Petrochina Daqing Oilfield Company, Daqing, Heilongjiang, China

  ⨯
• Pengfei Niu ,

  Roles Data curation, Formal analysis

  * E-mail: npf2207@163.com

  Affiliation Chengdu Exploration and Development Research Institute of PetroChina Daqing Oilfield Company, Chengdu, Sichuan, China

  https://orcid.org/0000-0002-1623-2338

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• Xueying Jin ,

  Roles Software, Validation

  ¶‡ These authors also contributed equally to this work.

  Affiliation Research Institute of Exploration and Development, Petrochina Daqing Oilfield Company, Daqing, Heilongjiang, China

  ⨯
• Liang Zhao ,

  Roles Validation, Visualization

  ¶‡ These authors also contributed equally to this work.

  Affiliation Research Institute of Exploration and Development, Petrochina Daqing Oilfield Company, Daqing, Heilongjiang, China

  ⨯
• Ying Wang ,

  Roles Project administration, Resources, Visualization

  ¶‡ These authors also contributed equally to this work.

  Affiliation Research Institute of Exploration and Development, Petrochina Daqing Oilfield Company, Daqing, Heilongjiang, China

  ⨯
• Yaguang Li ,

  Roles Formal analysis, Writing – original draft

  ¶‡ These authors also contributed equally to this work.

  Affiliation Research Institute of Exploration and Development, Petrochina Daqing Oilfield Company, Daqing, Heilongjiang, China

  ⨯
• Yu Zhang

  Roles Data curation, Writing – review & editing

  ¶‡ These authors also contributed equally to this work.

  Affiliation Research Institute of Exploration and Development, Petrochina Daqing Oilfield Company, Daqing, Heilongjiang, China

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