Geochemical reactivity of rocks of the Czech Republic

Figures & data

Figure 1. Location of samples contained in the lithogeochemical database.

Table 1. Categories of geochemical reactivity based on carbonate content and the coefficient of alkalinity and susceptibility to weathering.

Map legend id	Geochemical reactivity	Susceptibility to weathering	Carbonate content or coefficient of alkalinity	Rock types	Rocks
1	High reactivity	High	Carbonates > 10%	Rocks with CaCO3 content > 10%	Limestone, marlstone, marl
2	High reactivity	High	Carbonates 1–10%	Rocks with CaCO3 content 1–10%	Calcareous claystone, siltstone or sandstone
3	High reactivity	High	Carbonates 1–10%	Unconsolidated sediments with CaCO3 content 1–10%	Loess
4	High reactivity	High	Carbonates > 10%	Rocks with CaMg(CO3)2 content > 10%	Dolomite
5	High reactivity	High	Carbonates 1–10%	Rocks with CaMg(CO3)2 content 1–10%	Dolomitic siltstone and claystone
6	High reactivity	High	Carbonates 1–10%	Rocks with Ca-Mg-Fe-Mn(CO3) content 1–10%	Siltstone and claystone with variable content of carbonates
7	High reactivity	High	0.25–0.4	Pyroclastics with high Calk (0.25–0.4)	Pyroclastic deposits of basalt, basanite, tephrite
8	High reactivity	High	0.2–0.25	Pyroclastics with medium Calk (0.2–0.25)	Pyroclastic deposits of andesite, phonolite, trachyte, trachybasalt
9	High reactivity	High	0.1–0.2	Pyroclastics with low Calk (0.1–0.2)	Pyroclastic deposits of rhyolite, ignimbrite, andesite
10	Medium reactivity	High	0.1–0.2	Metamorphites with low Calk (0.1–0.2) with K, Mg in phylosilicates	Phillite
11	Medium reactivity	Medium	0.25–0.4	Volcanites with high Calk (0.25–0.4)	Basalt, basanite, tephrite, phonolite, foidolite, subaquatic breccia
12	Medium reactivity	Medium	0.2–0.25	Metamorphites with medium Calk (0.2–0.25)	Meta-andesite, phonolite, trachyte, trachybasalt
13	Medium reactivity	Medium	0.2–0.25	Volcanites with medium Calk (0.2–0.25)	Andesite, phonolite, trachyte, trachybasalt
14	Medium reactivity	Medium	0.2–0.25	Plutonites with medium Calk (0.2–0.25)	Syenite, microsyenite, syenogabbro
15	Medium reactivity	Medium	0.1–0.2	Consolidated sediments with low Calk (0.1–0.2)	Greywacke, siltstone, shale
16	Medium reactivity	medium	0.1–0.2	Volcanites with low Calk (0.1–0.2)	Dacite, rhyolite, ignimbrite
17	Medium reactivity	Medium	0.1–0.2	Plutonites with low Calk (0.1–0.2)	Granite, granodiorite, diorite, monzodiorite, tonalite, aplite, pegmatite, porphyry, lamprophyre
18	Medium reactivity	Medium	0.1–0.2	Metamorphites with low Calk (0.1–0.2)	Orthogneiss, metagranite, migmatite, granulite, metaconglomerate, metagraywacke, wacke, fels
19	Medium reactivity	Low	> 0.4	Rocks with very high Calk (>0.4)	Serpentinite, hornblendite, periditite, pyroxenite
20	Medium reactivity	Low	0.25–0.4	Plutonites with high Calk (0.25–0.4)	Gabbro, quartz-diorite
21	Medium reactivity	Low	0.25–0.4	Metamorphites with high Calk (0.25–0.4)	Metagabbro, meta-andesite, dolerite, talc schist
22	Low reactivity	High	0.05–0.1	Aleuropelites with very low Calk (0.05–0.1)	Siltstone, clay, claystone, clayey shale
23	Low reactivity	High	0.05–0.1	Psephites, psammites with very low Calk (0.05–0.1)	Sandstone, conglomerates, arkose, greywacke
24	Low reactivity	High	<0.05	Aleuropelites with extremely low Calk (<0.05)	Claystone, siltstone
25	Low reactivity	High	<0.05	Unconsolidated sediments with extremely low Calk (<0.05)	Loamy loess
26	Low reactivity	High	<0.05	Psephites, psammites with extremely low Calk (<0.05)	Sandstone, conglomerates, arkose, greywacke
27	Low reactivity	Medium	<0.1	Volcanites, plutonites and metamorphites with very-extremely low Calk (<0.1)	Quarzite, hornfels, metasiltstone, metarhyolite, metarhyolite- dacite
28	Low reactivity	Low	<0.05	Quartz rocks with SiO2 95% and extremely low Calk (<0.05)	Quartz-sandstone, silicite, quartzite,