Analysis of the Distribution and Microscopic Characteristics and Disintegration Characteristics of Carbonaceous Rocks: A Case Study of the Middle Devonian Luofu Formation in Western Guangxi of China

Table 3

Clay mineral composition characteristics of carbonaceous shale in the Luofu formation.

Sample number	Lithology	Kaolinite (%)	Chlorite (%)	Illite (%)	Montmorillonite (%)	Illite/montmorillonite layer	Green/montmorillonite layer	Mixed layer ratio
—	—	K	C	I	S	I/S	C/S	I/S	C/S
D2092-1	Carbonaceous mudstone	—	11	42	—	46	1	5	13
PM08-6-1		—	5	41	—	54	—	5	—
PM08-9-1		—	3	49	—	48	—	5	—
PM08-26-1		—	3	45	—	52	—	5	—
D0269-1		—	—	32	—	68	—	5	—