TY - JOUR

T1 - Soils on hard rocks in the northwest of Russia

T2 - Chemical and mineralogical properties, genesis, and classification problems

AU - Lesovaya, S. N.

AU - Goryachkin, S. V.

AU - Pogozhev, E. Yu

AU - Polekhovskii, Yu S.

AU - Zavarzin, A. A.

AU - Zavarzina, A. G.

N1 - Funding Information: ACKNOWLEDGMENTS This study was supported by the Russian Foundation for Basic Research, project no. 07-04-00464.

PY - 2008/4

Y1 - 2008/4

N2 - Soil formation on hard rocks - nepheline syenite, amphibolite, metamorphized gabbro diabase, and their derivatives - was studied in the mountainous tundra and in the northern and middle taiga zones of the Kola Peninsula and Karelia (in the Kivach Reserve). It was found that the soils developing from these rocks could be classified into three groups: (1) petrozems with the O-M profile (the most common variant), (2) podzols and podzolized podburs on the substrates with an admixture of morainic derivatives of acid rocks, and (3) shallow (<5 - 10 cm) pebbly soils on the substrates without an admixture of allochthonous material (the rarest variant). In soils of the third group, the pedogenic alteration of the mineral matrix does not result in the appearance of phyllosilicates in the fine fractions if these phyllosilicates are initially absent in the rock. In these soils, the protion of the organic matter, and binding of iron released from the weathered silicate minerals into iron-organic complexes) are virtually undifferentiated by the separate soil horizons because of the very low thickness of the soil profiles. These soils have the Oao-BHFao-M profile; it is suggested that they can be classified as leptic podburs. An admixture of morainic material containing phyllosilicate minerals favors a more pronounced differentiation of the modern pedogenic processes by separate soil horizons even in the case of shallow soil profiles; the intense transformation of phyllosilicates takes place in the soils.

AB - Soil formation on hard rocks - nepheline syenite, amphibolite, metamorphized gabbro diabase, and their derivatives - was studied in the mountainous tundra and in the northern and middle taiga zones of the Kola Peninsula and Karelia (in the Kivach Reserve). It was found that the soils developing from these rocks could be classified into three groups: (1) petrozems with the O-M profile (the most common variant), (2) podzols and podzolized podburs on the substrates with an admixture of morainic derivatives of acid rocks, and (3) shallow (<5 - 10 cm) pebbly soils on the substrates without an admixture of allochthonous material (the rarest variant). In soils of the third group, the pedogenic alteration of the mineral matrix does not result in the appearance of phyllosilicates in the fine fractions if these phyllosilicates are initially absent in the rock. In these soils, the protion of the organic matter, and binding of iron released from the weathered silicate minerals into iron-organic complexes) are virtually undifferentiated by the separate soil horizons because of the very low thickness of the soil profiles. These soils have the Oao-BHFao-M profile; it is suggested that they can be classified as leptic podburs. An admixture of morainic material containing phyllosilicate minerals favors a more pronounced differentiation of the modern pedogenic processes by separate soil horizons even in the case of shallow soil profiles; the intense transformation of phyllosilicates takes place in the soils.

UR - http://www.scopus.com/inward/record.url?scp=43249129121&partnerID=8YFLogxK

U2 - 10.1134/S1064229308040029

DO - 10.1134/S1064229308040029

M3 - Article

AN - SCOPUS:43249129121

VL - 41

SP - 363

EP - 376

JO - Eurasian Soil Science

JF - Eurasian Soil Science

SN - 1064-2293

IS - 4

ER -