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Table 5 Results of carbon and oxygen isotope analyses

From: Authigenic carbonate precipitation at the end-Guadalupian (Middle Permian) in China: Implications for the carbon cycle in ancient anoxic oceans

Unit/Fm Sample ID Type Thickness (m) δ13CVPDB δ18OVPDB
Mudstone Unit of the Maokou Fm E83-41 bundled calcite 10.54 −2.5 −9.2
Mudstone Unit of the Maokou Fm E83-40 bundled calcite 10.54 −2.4 −4.5
Mudstone Unit of the Maokou Fm E83-39 bundled calcite 10.54 −3.0 −8.9
Mudstone Unit of the Maokou Fm E83-38 bundled calcite 10.54 −2.1 −4.6
Mudstone Unit of the Maokou Fm E83-37 bundled calcite 10.53 −1.7 −9.3
Mudstone Unit of the Maokou Fm E83-36 bundled calcite 10.53 −2.4 −5.7
Mudstone Unit of the Maokou Fm E83-35 bundled calcite 10.53 −1.6 −10.7
Mudstone Unit of the Maokou Fm E83-34 bundled calcite 10.53 −2.1 −10.6
Mudstone Unit of the Maokou Fm E83-33 bundled calcite 10.53 −2.0 −7.8
Mudstone Unit of the Maokou Fm E83-32 bundled calcite 10.52 −2.1 −4.1
Mudstone Unit of the Maokou Fm E83-31 bundled calcite 10.52 −1.8 −9.3
Mudstone Unit of the Maokou Fm E83-30 bundled calcite 10.52 −1.8 −10.3
Mudstone Unit of the Maokou Fm E83-29 bundled calcite 10.52 −0.8 −5.4
Mudstone Unit of the Maokou Fm E83-28 bundled calcite 10.52 −0.4 −7.9
Mudstone Unit of the Maokou Fm E83-27 bundled calcite 10.51 0.0 −5.5
Mudstone Unit of the Maokou Fm E83-26 bundled calcite 10.51 −0.5 −7.2
Mudstone Unit of the Maokou Fm E83-25 bundled calcite 10.51 −0.6 −8.1
Mudstone Unit of the Maokou Fm E83-24 bundled calcite 10.51 −0.3 −4.4
Mudstone Unit of the Maokou Fm E83-23 bundled calcite 10.51 −0.6 −5.9
Mudstone Unit of the Maokou Fm E83-22 bundled calcite 10.50 −0.6 −6.2
Mudstone Unit of the Maokou Fm E83-21 bundled calcite 10.50 −0.9 −5.3
Mudstone Unit of the Maokou Fm E83-20 bundled calcite 10.50 −0.7 −10.0
Mudstone Unit of the Maokou Fm E83-19 bundled calcite 10.50 −0.9 −10.3
Mudstone Unit of the Maokou Fm E83-18 bundled calcite 10.50 −0.7 −5.9
Mudstone Unit of the Maokou Fm E83-17 bundled calcite 10.49 −0.7 −5.4
Mudstone Unit of the Maokou Fm E83-16 packed calcite 10.49 −8.7 −8.4
Mudstone Unit of the Maokou Fm E83-15 packed calcite 10.49 −9.5 −7.9
Mudstone Unit of the Maokou Fm E83-14 packed calcite 10.49 −9.1 −6.9
Mudstone Unit of the Maokou Fm E83-13 packed calcite 10.49 −10.6 −8.3
Mudstone Unit of the Maokou Fm E83-12 packed calcite 10.48 −7.5 −8.5
Mudstone Unit of the Maokou Fm E83-11 packed calcite 10.48 −11.7 −10.4
Mudstone Unit of the Maokou Fm E83-10 packed calcite 10.48 −10.2 −9.4
Mudstone Unit of the Maokou Fm E83-9 bundled calcite 10.48 −0.1 −6.8
Mudstone Unit of the Maokou Fm E83-8 bundled calcite 10.48 −0.7 −5.7
Mudstone Unit of the Maokou Fm E83-7 bundled calcite 10.47 −0.4 −4.4
Mudstone Unit of the Maokou Fm E83-6 bundled calcite 10.47 −0.1 −4.5
Mudstone Unit of the Maokou Fm E83-5 bundled calcite 10.47 −0.1 −7.0
Mudstone Unit of the Maokou Fm E83-4 bundled calcite 10.47 −0.4 −4.1
Mudstone Unit of the Maokou Fm E83-3 bundled calcite 10.47 −0.3 −4.2
Mudstone Unit of the Maokou Fm E83-2 bundled calcite 10.46 −0.2 −5.3
Mudstone Unit of the Maokou Fm E83-1 bundled calcite 10.46 −1.4 −7.4
Mudstone Unit of the Maokou Fm E65-7 bundled calcite 10.11 −0.9 −3.3
Mudstone Unit of the Maokou Fm E65-6 bundled calcite 10.11 −1.0 −3.7
Mudstone Unit of the Maokou Fm E65-5 bundled calcite 10.11 −1.1 −3.9
Mudstone Unit of the Maokou Fm E65-4 packed calcite 10.10 −9.6 −6.1
Mudstone Unit of the Maokou Fm E65-3 packed calcite 10.10 −8.7 −4.9
Mudstone Unit of the Maokou Fm E65-2 packed calcite 10.10 −9.1 −5.6
Mudstone Unit of the Maokou Fm E65-1 packed calcite 10.10 −9.6 −6.1
Mudstone Unit of the Maokou Fm E54 bundled calcite 9.73 -6.7 −8.8
Mudstone Unit of the Maokou Fm E31-7 randomly oriented calcite 9.02 −0.3 −7.7
Mudstone Unit of the Maokou Fm E31-6 randomly oriented calcite 9.01 −0.5 −6.4
Mudstone Unit of the Maokou Fm E31-5 randomly oriented calcite 9.00 −0.6 −4.7
Mudstone Unit of the Maokou Fm E31-4 randomly oriented calcite 8.99 −0.7 −8.1
Mudstone Unit of the Maokou Fm E31-3 randomly oriented calcite 8.98 −0.7 −4.7
Mudstone Unit of the Maokou Fm E31-2 randomly oriented calcite 8.97 −0.7 −4.9
Mudstone Unit of the Maokou Fm E31-1 randomly oriented calcite 8.96 −0.6 −5.4
Mudstone Unit of the Maokou Fm E23R14 bundled calcite 8.75 −1.4 −8.8
Mudstone Unit of the Maokou Fm E23R13 bundled calcite 8.75 −1.2 −8.4
Mudstone Unit of the Maokou Fm E23R12 bundled calcite 8.75 −0.4 −7.7
Mudstone Unit of the Maokou Fm E23R11 bundled calcite 8.74 −0.9 −10.5
Mudstone Unit of the Maokou Fm E23R10 bundled calcite 8.74 −1.3 −11.4
Mudstone Unit of the Maokou Fm E23R9 bundled calcite 8.74 −0.3 −14.2
Mudstone Unit of the Maokou Fm E23R8 bundled calcite 8.74 −0.1 −10.1
Mudstone Unit of the Maokou Fm E23R7 bundled calcite 8.74 −0.6 −12.3
Mudstone Unit of the Maokou Fm E23R6 bundled calcite 8.73 −0.8 −7.3
Mudstone Unit of the Maokou Fm E23R5 randomly oriented calcite 8.73 −1.4 −7.9
Mudstone Unit of the Maokou Fm E23R4 randomly oriented calcite 8.73 −0.7 −5.6
Mudstone Unit of the Maokou Fm E23R3 randomly oriented calcite 8.73 −1.0 −5.7
Mudstone Unit of the Maokou Fm E23R2 randomly oriented calcite 8.73 −0.8 −8.8
Mudstone Unit of the Maokou Fm E23R1 randomly oriented calcite 8.72 −0.7 −7.3
Mudstone Unit of the Maokou Fm E1-10 randomly oriented calcite 8.32 −1.7 −4.5
Mudstone Unit of the Maokou Fm E1-9 randomly oriented calcite 8.31 −1.3 −4.9
Mudstone Unit of the Maokou Fm E1-8 randomly oriented calcite 8.31 −1.4 −9.3
Mudstone Unit of the Maokou Fm E1-7 randomly oriented calcite 8.31 −1.3 −7.7
Mudstone Unit of the Maokou Fm E1-6 randomly oriented calcite 8.31 −0.8 −4.9
Mudstone Unit of the Maokou Fm E1-5 randomly oriented calcite 8.30 −0.6 −13.8
Mudstone Unit of the Maokou Fm E1-4 randomly oriented calcite 8.30 −0.6 −6.1
Mudstone Unit of the Maokou Fm E1-3 randomly oriented calcite 8.30 −0.9 −6.3
Mudstone Unit of the Maokou Fm E1-2 randomly oriented calcite 8.29 −1.2 −8.3
Mudstone Unit of the Maokou Fm E1-1 randomly oriented calcite 8.29 −1.4 −8.3
Mudstone Unit of the Maokou Fm D120-4 packed calcite 8.17 −6.3 −6.4
Mudstone Unit of the Maokou Fm D120-3 packed calcite 8.17 −5.9 −6.4
Mudstone Unit of the Maokou Fm D120-2 packed calcite 8.16 −5.1 −7.1
Mudstone Unit of the Maokou Fm D120-1 randomly oriented calcite 8.16 −0.6 −4.9
Mudstone Unit of the Maokou Fm D98 randomly oriented calcite 7.41 0.7 −4.8
Mudstone Unit of the Maokou Fm D84.5 randomly oriented calcite 6.95 0.3 −10.0
Mudstone Unit of the Maokou Fm D70.6 bundled calcite 6.39 0.0 −6.6
Mudstone Unit of the Maokou Fm D70.5 randomly oriented calcite 6.38 0.8 −3.5
Mudstone Unit of the Maokou Fm D60-4 randomly oriented calcite 6.14 0.0 −6.0
Mudstone Unit of the Maokou Fm D60-3 randomly oriented calcite 6.13 0.6 −9.9
Mudstone Unit of the Maokou Fm D60-2 randomly oriented calcite 6.13 0.8 −7.7
Mudstone Unit of the Maokou Fm D60-1 randomly oriented calcite 6.12 0.2 −8.0
Mudstone Unit of the Maokou Fm D22-2 randomly oriented calcite 4.50 −6.6 −6.8
Mudstone Unit of the Maokou Fm D22-1 randomly oriented calcite 4.49 −6.6 –5.7
Mudstone Unit of the Maokou Fm C54-4 bundled calcite 2.95 1.7 −10.3
Mudstone Unit of the Maokou Fm C54-3 bundled calcite 2.94 2.3 −4.2
Mudstone Unit of the Maokou Fm C54-2 bundled calcite 2.94 2.4 −4.6
Mudstone Unit of the Maokou Fm C54-1 bundled calcite 2.94 2.6 −3.5
Mudstone Unit of the Maokou Fm C43 bundled calcite 2.62 1.3 −11.6
Mudstone Unit of the Maokou Fm C28-5 bundled calcite 2.09 1.4 −10.5
Mudstone Unit of the Maokou Fm C28-4 bundled calcite 2.09 1.6 −4.8
Mudstone Unit of the Maokou Fm C28-3 bundled calcite 2.09 1.9 −4.8
Mudstone Unit of the Maokou Fm C28-2 bundled calcite 2.09 2.3 −3.5
Mudstone Unit of the Maokou Fm C28-1 bundled calcite 2.09 1.8 −4.2
Mudstone Unit of the Maokou Fm C9-4 randomly oriented calcite 1.64 −5.8 −8.6
Mudstone Unit of the Maokou Fm C9-3 randomly oriented calcite 1.63 −4.3 −6.4
Mudstone Unit of the Maokou Fm C9-2 randomly oriented calcite 1.62 −6.2 −6.2
Mudstone Unit of the Maokou Fm C9-1 randomly oriented calcite 1.61 −6.3 −6.2
Mudstone Unit of the Maokou Fm B27 randomly oriented calcite 1.37 0.3 −4.3
Mudstone Unit of the Maokou Fm B18-5 randomly oriented calcite 1.07 1.6 −4.4
Mudstone Unit of the Maokou Fm B18-4 randomly oriented calcite 1.07 1.5 −9.9
Mudstone Unit of the Maokou Fm B18-3 randomly oriented calcite 1.07 1.6 −9.1
Mudstone Unit of the Maokou Fm B18-2 randomly oriented calcite 1.07 1.3 −6.2
Mudstone Unit of the Maokou Fm B18-1 randomly oriented calcite 1.07 1.4 −6.5
Mudstone Unit of the Maokou Fm B16-8 randomly oriented calcite 1.06 1.0 −4.5
Mudstone Unit of the Maokou Fm B16-7 randomly oriented calcite 1.06 1.0 −4.7
Mudstone Unit of the Maokou Fm B16-6 randomly oriented calcite 1.05 1.0 −4.5
Mudstone Unit of the Maokou Fm B16-5 randomly oriented calcite 1.05 0.8 −4.6
Mudstone Unit of the Maokou Fm B16-4 randomly oriented calcite 1.04 0.7 −4.7
Mudstone Unit of the Maokou Fm B16-3 randomly oriented calcite 1.04 0.7 −8.0
Mudstone Unit of the Maokou Fm B16-2 randomly oriented calcite 1.03 0.6 −9.0
Mudstone Unit of the Maokou Fm B16-1 randomly oriented calcite 1.03 0.6 −8.2