Acknowledgements
We thank An Li for his sampling assistance, Martin Van Kranendonk for field logistics advice, and Gary Byerly for insights on igneous textures and petrogenesis. Funding support comes from the American Chemical Society Petroleum Research Fund (PRF-53549-ND8), start-up funds from the University of Hong Kong, and the General Research Fund of the Hong Kong Research Grants Council (#17305718), all to A.A.G.W. Reviewer contributions are gratefully acknowledged. L. A. acknowledges the support of the Czech Science Foundation through the project no. 19-08066S and institutional support RVO67985831 of the Institute of Geology of the Czech Academy of. Reviewer contributions are gratefully acknowledged.