Geofluids

Research Article

Biomarkers and C and S Isotopes of the Permian to Triassic Solid Bitumen and Its Potential Source Rocks in NE Sichuan Basin

Table 1

Potential source rock TOC and aryl isoprenoids (AI), its kerogen vitrinite reflectance , and S/C atomic ratio and δ¹³C and δ³⁴S values.


Area	Sample number	Age	Depth (m)	Lithology	(%)	(%)	AI

Tongjiang	TJ7-60	Cam.	Otc	Black shale	2.17	4.2/3.0	X	—	—	—
Tongjiang	TJ7-153	Cam.	Otc	Black shale	2.35	4.3/3.1	X	−31.9	3.5	—
Wanyuan	ZB19	Cam.	Otc	Black shale	5.26	—	X	−30.7	14.5	13.5
Huayinshan	HYS-3	O₃w	Otc	Siliceous shale	2.63	2.0/1.6	X	−30.0	7.5	−3.2
	HYS-6	S₁l	Otc	Black shale	8.72	2.1/1.7		−28.7	15.9	—
	HYS-8	S₁l	Otc	Black shale	1.96	—		−29.1	−0.4	—
	HYS-11	S₁l	Otc	Black shale	1.99	—		−29.5	5.3	—
Guanba	Guanba	S₁	Otc	Black shale	—	—	X	—	7.2	—
Shiniulan	Shiniulan	S₁	Otc	Black shale	—	—	X	—	6.8	−4.3
Chengkou	ZB21	S₁l	Otc	Black shale	—	2.9/2.2	X	−29.7	−4.4	−3.9
Tongjiang	TJ7-104	S₁l	Otc	Black shale	—	2.8/2.1		−30.8	1.9	—
HB	HB1	P₃l	5662~5713	Black mudstone	1.5	—	—	−27.8	−26.7	—
PG	PG5	P₃l	5586~5747	Mudstone	—	—	—		—	—
PG	PG5	P₃l	4891~5157	Cal. mudstone	—	—	—		—	—
JX	JX1	P₃l	4727~4763	Cal. mudstone	—	—	—		—	—
YB	YB3	P₃l	7123~7203	Cal. mudstone	—	—	—	−26.8	—	—
Zhenba	ZB-09-01	P₃l	Otc	Black limestone	1.21	—	—	−27.6	0.1	—
Huayinshan	10-VI-4	P₃l	333.5	Black mudstone	3.11	/1.7	X	−24.2	—	—
	10-VI-16	P₃l	363.5	Black mudstone	1.26	—	X	−28.1	4.1	—
	10-VI-30	P₃l	413.8	Black mudstone	1.96	/1.7	X	−23.2	—	—
	10-VI-40	P₃l	446.3	Black mudstone	2.46	—	X	−23.0	0.6	—
	10-VI-56	P₃l	482.6	Black mudstone	4.33	/1.7	X	−22.7	−6.6	−14.8
Ludu	LDI-7	P₃d	Otc	Black mudstone	4.83	—		−27.1	—	—
Zhenba	ZB14-1	P₃d	Otc	Black chert	7.20	2.2/1.8	X	−26.5	−1.7	−21.3
Wangyuan	ZB17-3	P₃d	Otc	Black shale	3.59	/1.8	X	−26.4	5.5	−21.4
Guanzi	GZ17	P₃d	Otc	Black shale	—	—		−27.2	−27.1	−32.6
Guanzi	GZ18	P₃d	Otc	Black shale	—	—		−26.5	−30.6	−34.5
CJG	CJ43	P₃d	Otc	Black shale	0.33	0.7/0.8		−27.2	—	—

—: no data available; Cai et al. [12]; Borjigen et al. [4]; X: no; : yes. and : kerogen and pyrite δ³⁴S; cal.: calcareous; CJG: Changjianggou; equivalent vitrinite reflectance [17].