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Table 3 Cross-correlations between geochemical, microstructural and optical signals in the studied fossil brachiopodCross-correlations are calculated between isotope composition (δ13C and δ18O), minor-element (Mn, Fe, and Mn) concentrations, MCLI, and AFR or ΑF-PCR of the fossil Terebratalia coreanica and Laqueus rubellus shells. Coefficient values in brackets are not statistically significant (p > 0.01)

From: The effects of meteoric diagenesis on the geochemical composition and microstructure of Pliocene fossil Terebratalia coreanica and Laqueus rubellus brachiopod shells from northeastern Japan

  δ13C (‰VPDB) δ18O (‰VPDB) Mn (ppm) Fe (ppm) Sr (ppm) Mean CL intensity (MCLI: 0–255) Altered fiber and puncta-filling cement ratio (AF-PCR: %)
Fossil T. coreanica and L. rubellus (n = 36)
 δ13C (‰VPDB) 1       
 δ18O (‰VPDB) 0.9 1      
 Mn (ppm) −0.71 −0.71 1     
 Fe (ppm) −0.51 −0.43 0.61 1    
 Sr (ppm) [0.21] [0.18] [−0.42] [−0.02] 1   
 Mean CL intensity (MCLI: 0–255) −0.53 −0.54 0.77 [0.34] [−0.23] 1  
 Altered fiber and puncta-filling cement ratio (AF-PCR: %) −0.75 −0.76 0.75 0.6 [−0.15] 0.61 1
Fossil T. coreanica (n = 22)
 δ13C (‰VPDB) 1       
 δ18O (‰VPDB) 0.9 1      
 Mn (ppm) −0.77 −0.72 1     
 Fe (ppm) [−0.48] [− 0.35] 0.54 1    
 Sr (ppm) 0.54 0.55 −0.68 [− 0.19] 1   
 Mean CL intensity (MCLI: 0–255) −0.65 −0.64 0.80 [0.20] −0.47 1  
 Altered fiber and puncta-filling cement ratio (AF-PCR: %) −0.79 −0.81 0.77 0.62 [−0.44] 0.63 1
Fossil L. rubellus (n = 14)
 δ13C (‰VPDB) 1       
 δ18O (‰VPDB) 0.91 1      
 Mn (ppm) [−0.65] − 0.72 1     
 Fe (ppm) [−0.57] [− 0.56] 0.76 1    
 Sr (ppm) [−0.15] [− 0.20] [− 0.16] [0.17] 1   
 Mean CL intensity (MCLI: 0–255) [−0.32] [−0.37] 0.69 [0.62] [0.05] 1  
 Altered fiber and puncta-filling cement ratio (AF-PCR: %) −0.71 − 0.71 0.71 [0.57] [0.31] [0.55] 1