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Resource: used or used up in processes

Primary minerals

Appears in 14 processs and 15 steps. Everything below is linked: open a process to see it in context.

Top processes

Mineral weathering and parent material

2 steps

Living soil system

1 step

Mineral weathering and parent material

Silicate weathering rate control and CO2 drawdown

1 step

Proton-promoted dissolution of feldspar and mica releases base cations and silica

Pedogenic age sequence: from apatite phosphorus to occluded phosphorus

1 step

Young soil: primary apatite supplies phosphorus and dominates total P

Clay mineral transformation sequence

1 step

Mica and feldspar lose interlayer K and alter to illite

Physical weathering: frost cracking, thermal stress and root wedging

1 step

Rock fragments and fresh mineral surface area increase

Show 8 more processes

Chemical weathering: CO2-driven dissolution and CO2 consumption

1 step

Which minerals are attacked

Biological weathering by roots, mycorrhizal fungi and microbes (plants speed weathering about 2-10 fold)

1 step

Ectomycorrhizal hyphae bore tunnels 3-10 micrometres wide into feldspar and hornblende

Weathering

1 step

Weathering regime: supply-limited versus kinetically limited

Weathering regime: supply-limited versus kinetically limited

1 step

Fresh surface exposed: weathering rate rises (up to 0.1-0.5 chemical depletion)

Chronosequence: limiting nutrient and nutrient source shift as soil ages

1 step

Young soil: apatite weathers and releases P, but N is scarce so N limits plants

Soil formation

1 step

Roots, fungi and burrowers engineer soil formation

Roots, fungi and burrowers engineer soil formation

1 step

Roots and mycorrhizal fungi release protons and organic anions that dissolve minerals

Mineral surfaces accumulate and protect organic carbon as soil ages

1 step

Weathering forms short-range-order Fe and Al minerals

Often found with

Water 5 Plant roots 4 Parent rock 3 Water 3 Minerals 3 Phosphorus 3 Rock 3 Mycorrhizal fungi 3 Organic acids 3 Carbonic acid 2 Soil water 2 Hydrogen ions 2

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