The Evolutionary Characteristics of Lower Permian Keziliqiman Reefs in the Southwest Margin of Tarim Basin, Northwest China

Table 1

EPMA of reef limestone.

Sample	Types of reef limestone and luminescence intensity	Na2O	MgO	CaO	BaO	SrO	SiO2	FeO	MnO	TiO2	CO2	FeO/MnO
Figure 12(b)	Tubiphytes, medium orange red	0.015	0.865	54.427	0.053	0.058	0	0.038	0.036	0	43.753	1.06
	Clasts wrapped by Tubiphytes, weak light	0.02	0.731	54.935	0	0.007	0	0.035	0.003	0	43.95	11.67
	Cement which fills pores, whose core is nonluminescent	0.017	0.607	53.742	0	0.048	0.821	0.086	0	0.016	44.144	—
	Cement which fills pores, whose edge gives off bright red	0.035	0.272	56.438	0	0.037	0	0	0.058	0.016	44.681	—
Figure 12(d)	Sea urchin spines, nonluminescent-very weal light	0.042	0.737	54.788	0.015	0.055	0	0.068	0.032	0	43.919	2.13
		0	0.881	53.58	0.063	0.056	0.661	0.166	0.027	0.024	44.165	6.15
	Sea urchin spines, medium luminescent	0.012	1.27	53.899	0.034	0	0	0.019	0.056	0	43.75	0.34
		0.007	1.244	53.718	0	0	0	0.005	0.02	0	43.536	0.25
Figure 12(e)	Micrite which fills the cavities of bryozoans, without being recrystallized	0.049	0.904	53.172	0.185	0.041	0	0.077	0.068	0.023	42.935	1.13
	Spar (recrystallized from micrite) which fill the cavities of bryozoans;	0.012	0.663	52.363	0.047	0.101	0	0.432	0.041	0.023	42.198	10.54
Figure 12(h)	Brachiopods, nonluminescent	0.159	0.358	54.885	0	0.186	0	0.038	0.025	0	43.693	1.52
	Subascosymplegma, whose bones are nonluminescent	0.224	0.464	55.247	0	0.174	0	0.011	0	0.024	44.128	—