Distribution of Trace Elements, Sr-C Isotopes, and Sedimentary Characteristics as Paleoenvironmental Indicator of the Late Permian Linxi Formation in the Linxi Area, Eastern Inner Mongolia

Table 2

Sr isotope values of the limestone from the Linxi area Guandi profile and compared with other parts of the world.

^87Sr/^86Sr (Linxi Formation of Permian in Linxi area, Inner Mongolia)
Number	LG3-7T	LG15-1T	LG51-2T	LG72-1T	LG72-5T	LG72-8T	LG72-13T	LG73-1T	LG73-2CT
Lithology	Limestone	Oomicrite	Stromatolitic limestone	Limestone	Bioclastic limestone	Bioclastic limestone	Stromatolitic limestone	Limestone	Bioclastic limestone
SiO2 (%)	13.61	3.11	14.02	18.76	18.48	12.9	11.05	8.93	13.61
MnO (%)	0.30	0.51	0.30	0.23	0.21	0.42	0.51	0.28	0.30
Sr(ug/g)	1275	1639	1604	930.7	859.5	1123	1225	1498	2762
^87Sr/^86Sr	0.707719	0.707593	0.707684	0.707526	0.707758	0.707953	0.707297	0.707802	0.707285
^87Sr/^86Sr (lacustrine carbonate rocks of Triassic in Linxi area, Inner Mongolia)
Number	BLS-1	BLS-2	BLS-3	BLS-4
^87Sr/^86Sr	0.713605	0.714335	0.711949	0.714164
^87Sr/^86Sr (marine carbonate and conodonts of Permian/Triassic in the other places of the world)
Marine limestone of Permian in South China^1	0.70732	0.70757	0.7076	0.70754	0.70753	0.70757	0.70734	0.70744	0.70744
	0.70741	0.70744	0.70742	0.70745	0.70739	0.70740	0.70749	0.70747	0.70750
	0.70757	0.70758	0.70748	0.70752	0.70755	0.70722	0.70739	0.70767
Conodonts from Permian/Triassic boundary in Abadeh, Iran^2	0.707038	0.707079	0.707092	0.707218	0.707225	0.707219	0.707266	0.707392	0.70739
	0.706923	0.706970	0.707010	0.707006	0.70699	0.706945	0.707050	0.707138	0.707046
Marine carbonate of late Permian in upper Yangtze region^3	0.70743	0.70742	0.70684	0.70697	0.70722	0.70672	0.70755	0.70725	0.70752
Conodonts of Permian/Triassic, United States^4	0.708111	0.708132	0.708878	0.708841	0.707957	0.708011	0.708093	0.708345	0.707605
	0.707453	0.707629	0.707643	0.707561	0.707506	0.707513	0.707416	0.707461	0.707336
	0.707341	0.707333	0.707388	0.707331	0.707229	0.706914	0.707031	0.706948	0.707247
	0.707406	0.707059	0.707027	0.706913	0.70734	0.707404	0.707373	0.707133	0.707208
	0.707406	0.707059	0.707027	0.706913	0.70734	0.707404	0.707373	0.707133	0.707208
Conodonts of Permian/Triassic, Pakistan^5	0.707211	0.707388	0.707117	0.70719	0.707168	0.707200	0.707100	0.707102	0.707117
	0.707186	0.707240	0.707130	0.707399	0.707690	0.707322	0.707427	0.707736	0.707499
	0.707568	0.707458	0.707587	0.707469	0.707440	0.707503	0.707308	0.707626	0.707856

¹Data from Tian and Zheng [8]; ²data come Korte et al. [9, 10]; ³data come Huang et al. [11]; ^4,5data from Martin and Macdougall [12].