Here we go with a new article on the origin of methane-rich gases:
Sano, Y., Kinoshita, N., Kagoshima, T., Takahata, N., Sakata, S., Toki, T., Kawagucci, S., Waseda, A., Lan, T., Wen, H., Chen, A., Lee, H., Yang, T. F., Zheng, G., Tomonaga, Y., Roulleau, E., & Pinti, D. L. (2017). Origin of methane-rich natural gas at the West Pacific convergent plate boundary. Sci. Rep., 7, 15646, doi:10.1038/s41598-017-15959-5.
Thanks to Prof. Sano and all the co-authors!