Fig. 2
From: Diagenesis and very low grade metamorphism in a 7,012 m-deep well Hongcan 1, eastern Tibetan plateau
Texture variation with depth. a Mudrock, single polar, 100 m, HW-511, no orientation was observed in clay matrix. b Shale, single polar, 358.4 m, HW-446, sedimentary lamination keeps well. c Slate, single polar, 4375.1 m, HW-589, new formed clay minerals grow approximately along bedding layer. d Phyllite, single polar, 7011.2 m, HW-734, phyllitic structure, penetrative schistosity with three deformation phases developed. e Mylonite, single polar, 6073.2 m, HW-732, augen structure. f Back-scattered electron scanning microscopy image, mircotexture of phyllite, 7011.2 m, HW-734, matrix is dominated by chlorite and muscovite; micro crenulation can be observed. Qtz quartz, Fs feldspar, Ms muscovite, Chl chlorite, Ill illite, Rt rutile