Grain-Size Control on the Rare Earth Elements Distribution in the Late Diagenesis of Cretaceous Shales from the Southern Apennines (Italy)

Table 5

Correlation matrix for same elements. LREE = (La-Nd); MREE = (Sm-Tb); HREE = (Dy-Lu). Bold numbers indicate 𝑃>0.001; italic numbers indicate 0.01 < 𝑃<0.001.

(a) Bulk sample

	LREE	MREE	HREE	Nb	Th	Y	Zr	P2O5
LREE	1.0000
MREE	0.9675	1.0000
HREE	0.9319	0.9848	1.0000
Nb	0.9841	0.9624	0.9424	1.0000
Th	0.9177	0.8762	0.8677	0.8792	1.0000
Y	0.8764	0.9681	0.9617	0.8740	0.7702	1.0000
Zr	0.9780	0.9376	0.9270	0.9851	0.9370	0.8263	1.0000
P2O5	−0.1173	−0.2067	−0.3540	−0.1509	−0.3922	−0.2184	−0.2546	1.0000

(b) Fraction >63 𝜇m

	LREE	MREE	HREE	Nb	Th	Y	Zr	P2O5
LREE	1.0000
MREE	0.1925	1.0000
HREE	0.0126	0.9684	1.0000
Nb	0.9244	0.3873	0.2330	1.0000
Th	0.8284	−0.0548	−0.1273	0.8314	1.0000
Y	−0.2724	0.8817	0.9307	−0.0929	−0.4784	1.0000
Zr	0.6876	0.3704	0.3398	0.8569	0.8661	−0.0261	1.0000
P2O5	0.7896	−0.4188	−0.5561	0.5486	0.7451	−0.7425	0.3369	1.0000

(c) Fraction (32–63) 𝜇m

	LREE	MREE	HREE	Nb	Th	Y	Zr	P2O5
LREE	1.0000
MREE	0.9839	1.0000
HREE	0.9895	0.9994	1.0000
Nb	0.9930	0.9981	0.9996	1.0000
Th	0.9336	0.9826	0.9756	0.9694	1.0000
Y	0.9943	0.9592	0.9684	0.9747	0.8901	1.0000
Zr	0.9704	0.9979	0.9951	0.9921	0.9925	0.9391	1.0000
P2O5	0.9803	0.9292	0.9415	0.9501	0.8445	0.9958	0.9036	1.0000

(d) Fraction (0.1–2) 𝜇m

	LREE	MREE	HREE	Nb	Th	Y	Zr	P2O5
LREE	1.0000
MREE	0.9337	1.0000
HREE	0.9620	0.9666	1.0000
Nb	0.9858	0.9272	0.9672	1.0000
Th	0.9375	0.9037	0.9086	0.9667	1.0000
Y	0.9501	0.9848	0.9897	0.9380	0.8780	1.0000
Zr	0.9364	0.8526	0.9447	0.9715	0.9265	0.8899	1.0000
P2O5	−0.0469	−0.1090	−0.2443	−0.1808	−0.1185	−0.1601	−0.3380	1.0000

(e) Finest fraction (<0.1) 𝜇m

	LREE	MREE	HREE	Nb	Th	Y	Zr	P2O5
LREE	1.0000
MREE	0.9931	1.0000
HREE	0.7402	0.7521	1.0000
Nb	0.9308	0.8860	0.7233	1.0000
Th	0.8038	0.8041	0.9788	0.8193	1.0000
Y	0.7535	0.7628	0.9972	0.7483	0.9905	1.0000
Zr	0.6996	0.7172	0.9867	0.6567	0.9349	0.9717	1.0000
P2O5	0.6115	0.6755	0.2555	0.2913	0.2263	0.2350	0.2990	1.0000