Determination of Provenance and Tectonic Settings of Niger Delta Clastic Facies Using Well-Y, Onshore Delta State, Nigeria

Table 4

Range of elemental ratios for felsic and mafic igneous rocks and corresponding upper continental crust values. The table of range of mafic and felsic rocks is after Cullers [23, 24]; Cullers and Podkovyrov [25]; Cullers et al. [26]; and the UCC values are after Taylor and McLennan [20].

Elemental ratios	Felsic rocks	Mafic rocks	Upper continental crust
Th/Sc	0.84–20.05	0.05–0.22	0.79
Th/Co	0.27–19.4	0.04–1.4	0.63
Th/Cr	0.13–2.7	0.018–0.046	0.13
Cr/Th	4.00–15.00	25–500	7.76
La/Th	25.0–16.3	0.43–0.86	2.21