Mechanical Erosion in a Tropical River Basin in Southeastern Brazil: Chemical Characteristics and Annual Fluvial Transport Mechanisms

Table 2

Mobility estimation of the elements during the rock-alteration process in the Sorocaba River basin.

Element	Crust	Sorocaba River Basin
	𝐶𝑡 (%)	𝐶𝑡 (%)	% loss (−) or gain (+)
Al	6.93	11.14	0
Fe	3.59	6.40	11
Mn	0.07	0.31	177
Na	1.42	0.27	−88
Ca	4.50	0.49	−93
Mg	1.64	0.52	−80
K	2.44	1.88	−52
Si	27.50	22.71	−49