Details
| Original language | English |
|---|---|
| Pages (from-to) | 596-604 |
| Number of pages | 9 |
| Journal | CATENA |
| Volume | 137 |
| Publication status | Published - 13 Sept 2016 |
Abstract
Recent soils from basic (amphibolite and meta-gabbro amphibolite) and ultrabasic (serpentinous dunite) rocks formed in cold and humid climates of Northern Eurasia (Russia) were studied to detail the characterization of soils and rocks with special attention to the interdependence of porosity system and rock mineralogy. The study plots were located in taiga and tundra zones of East Fennoscandia and the Polar UralMountains. A variety of methodswas used including optical microscopy, X-ray diffraction and Rietveld analysis, and three supplementalmethods for the determination of pore space characteristics in rocks: (i) mercury intrusion porosimetry, (ii) a modification of this method using the intrusion of a molten alloy (Wood's metal), and (iii) scanning atomic-force microscopy. The results illustrate that the specification of the porosity systemis a significant factor in tracing the clay mineralogy in soils formed from hard rocks. Ultrabasic rock is the most sensitive to weathering, as determined by (i) the high value of small pores, especially those with a radius of b10 nm, (ii) the elongated form of the pores and surface roughness, and (iii) zones with an accumulation of phyllosilicates in regions with higher porosity causing the formation of soil enriched by clay minerals. Despite the presence of lowproportions of phyllosilicates in both types of basic rocks, only soil frommeta-gabbro amphibolite is enriched by clay minerals and is most probably affected by small pores (b10 nm). The absence of phyllosilicate accumulation along the pores and the predominantly empty space inside the pores indicates the limitation of potential sources of phyllosilicates for developing soils frommeta-gabbro amphibolite. Insignificant phyllosilicate accumulation in shallowsoil fromamphibolite, inwhich the fine size fractions are mostly the result of rock disintegration, is supposedly due to a particularly narrow pore size distribution with a predominance of pores between 100 and 1000 nm.
Keywords
- Amphibolites, Mineral associations, Pore space characteristics, Serpentinous dunite, Silicate weathering, Soil formation
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Earth-Surface Processes
Cite this
- Standard
- Harvard
- Apa
- Vancouver
- BibTeX
- RIS
In: CATENA, Vol. 137, 13.09.2016, p. 596-604.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Soil development on basic and ultrabasic rocks in cold environments of Russia traced by mineralogical composition and pore space characteristics
AU - Lessovaia, Sofia N.
AU - Dultz, Stefan
AU - Plötze, Michael
AU - Andreeva, Natalia
AU - Polekhovsky, Yury
AU - Filimonov, Alexey
AU - Momotova, Olesya
N1 - Funding information: This study was supported by the Russian Foundation for Basic Research ( 14-04-00327 ), SaintPetersburg State University ( 18.38.86.2012 ) and a grant from the DAAD through their fellowship program under contract number A/10/01109 (S. Lessovaia). The authors are grateful to two anonymous reviewers for helpful suggestions and remarks.
PY - 2016/9/13
Y1 - 2016/9/13
N2 - Recent soils from basic (amphibolite and meta-gabbro amphibolite) and ultrabasic (serpentinous dunite) rocks formed in cold and humid climates of Northern Eurasia (Russia) were studied to detail the characterization of soils and rocks with special attention to the interdependence of porosity system and rock mineralogy. The study plots were located in taiga and tundra zones of East Fennoscandia and the Polar UralMountains. A variety of methodswas used including optical microscopy, X-ray diffraction and Rietveld analysis, and three supplementalmethods for the determination of pore space characteristics in rocks: (i) mercury intrusion porosimetry, (ii) a modification of this method using the intrusion of a molten alloy (Wood's metal), and (iii) scanning atomic-force microscopy. The results illustrate that the specification of the porosity systemis a significant factor in tracing the clay mineralogy in soils formed from hard rocks. Ultrabasic rock is the most sensitive to weathering, as determined by (i) the high value of small pores, especially those with a radius of b10 nm, (ii) the elongated form of the pores and surface roughness, and (iii) zones with an accumulation of phyllosilicates in regions with higher porosity causing the formation of soil enriched by clay minerals. Despite the presence of lowproportions of phyllosilicates in both types of basic rocks, only soil frommeta-gabbro amphibolite is enriched by clay minerals and is most probably affected by small pores (b10 nm). The absence of phyllosilicate accumulation along the pores and the predominantly empty space inside the pores indicates the limitation of potential sources of phyllosilicates for developing soils frommeta-gabbro amphibolite. Insignificant phyllosilicate accumulation in shallowsoil fromamphibolite, inwhich the fine size fractions are mostly the result of rock disintegration, is supposedly due to a particularly narrow pore size distribution with a predominance of pores between 100 and 1000 nm.
AB - Recent soils from basic (amphibolite and meta-gabbro amphibolite) and ultrabasic (serpentinous dunite) rocks formed in cold and humid climates of Northern Eurasia (Russia) were studied to detail the characterization of soils and rocks with special attention to the interdependence of porosity system and rock mineralogy. The study plots were located in taiga and tundra zones of East Fennoscandia and the Polar UralMountains. A variety of methodswas used including optical microscopy, X-ray diffraction and Rietveld analysis, and three supplementalmethods for the determination of pore space characteristics in rocks: (i) mercury intrusion porosimetry, (ii) a modification of this method using the intrusion of a molten alloy (Wood's metal), and (iii) scanning atomic-force microscopy. The results illustrate that the specification of the porosity systemis a significant factor in tracing the clay mineralogy in soils formed from hard rocks. Ultrabasic rock is the most sensitive to weathering, as determined by (i) the high value of small pores, especially those with a radius of b10 nm, (ii) the elongated form of the pores and surface roughness, and (iii) zones with an accumulation of phyllosilicates in regions with higher porosity causing the formation of soil enriched by clay minerals. Despite the presence of lowproportions of phyllosilicates in both types of basic rocks, only soil frommeta-gabbro amphibolite is enriched by clay minerals and is most probably affected by small pores (b10 nm). The absence of phyllosilicate accumulation along the pores and the predominantly empty space inside the pores indicates the limitation of potential sources of phyllosilicates for developing soils frommeta-gabbro amphibolite. Insignificant phyllosilicate accumulation in shallowsoil fromamphibolite, inwhich the fine size fractions are mostly the result of rock disintegration, is supposedly due to a particularly narrow pore size distribution with a predominance of pores between 100 and 1000 nm.
KW - Amphibolites
KW - Mineral associations
KW - Pore space characteristics
KW - Serpentinous dunite
KW - Silicate weathering
KW - Soil formation
UR - http://www.scopus.com/inward/record.url?scp=84964305255&partnerID=8YFLogxK
U2 - 10.1016/j.catena.2014.11.020
DO - 10.1016/j.catena.2014.11.020
M3 - Article
AN - SCOPUS:84964305255
VL - 137
SP - 596
EP - 604
JO - CATENA
JF - CATENA
SN - 0341-8162
ER -