Fig. 6
The energy dispersive X-ray spectra (EDX) and elemental atomic concentrations of the typical fresh and weathered rock particles (the Al peaks in EDX mainly originated from the collecting foils). a SiO2 (particle #4 in Fig. 5a), b “SiO2+CaCO3” (particle #12 in Fig. 5a), c CaCO3 (particle #8 in Fig. 5a), d CaSO4 (particle #26 in Fig. 5b)
