Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
Soil formation from ultrabasic rocks in bioclimatic conditions of mountainous tundra (the Polar Urals, Russia): Mineralogical aspects. / Lessovaia, S.; Polekhovsky, Yu.; Pogozhev, Evgeniy.
19th World Congress of Soil Science. Soil Solutions for a Changing World. 2010. p. 100-103.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Soil formation from ultrabasic rocks in bioclimatic conditions of mountainous tundra (the Polar Urals, Russia): Mineralogical aspects
AU - Lessovaia, S.
AU - Polekhovsky, Yu.
AU - Pogozhev, Evgeniy
PY - 2010
Y1 - 2010
N2 - Mineral associations of soils located in mountainous tundra derived from and underlain by ultrabasic rocksusing the example of the Polar Urals were studied. Key plots are located on a flat summit and a slope of theRai-Iz massif where ultrabasic rocks are represented by a dunite - harzburgite complex and the Rai-Iz massif,on a moraine ridge consisting mostly of basic material with admixtures of ultrabasic rocks.The mineral association in all studied sola is a result of (i) disintegration of easy weathering ultrabasic rocksthat are a source of olivine, pyroxenes, serpentine, talc, and chlorite; (ii) influence of allochthonous materialenriched by quartz and feldspars; and (iii) pedogenic neoformation and decomposition of saponite; and (iv)development of iron (hydr)oxides in micro-cracks of olivine, pyroxenes, and serpentine and fragments ofplant tissues. Clay minerals associations in sola are determined by resources of ultrabasic rocks even in caseof mixture of ultrabasic and basic rocks when the latter are predominant. The acidic effect of moss andlichens seems to be a reason for selective decomposition of the most unstable minerals despite the pH valueof bulk samples.
AB - Mineral associations of soils located in mountainous tundra derived from and underlain by ultrabasic rocksusing the example of the Polar Urals were studied. Key plots are located on a flat summit and a slope of theRai-Iz massif where ultrabasic rocks are represented by a dunite - harzburgite complex and the Rai-Iz massif,on a moraine ridge consisting mostly of basic material with admixtures of ultrabasic rocks.The mineral association in all studied sola is a result of (i) disintegration of easy weathering ultrabasic rocksthat are a source of olivine, pyroxenes, serpentine, talc, and chlorite; (ii) influence of allochthonous materialenriched by quartz and feldspars; and (iii) pedogenic neoformation and decomposition of saponite; and (iv)development of iron (hydr)oxides in micro-cracks of olivine, pyroxenes, and serpentine and fragments ofplant tissues. Clay minerals associations in sola are determined by resources of ultrabasic rocks even in caseof mixture of ultrabasic and basic rocks when the latter are predominant. The acidic effect of moss andlichens seems to be a reason for selective decomposition of the most unstable minerals despite the pH valueof bulk samples.
UR - https://iuss.org/19th%20WCSS/Symposium/pdf/0144.pdf
M3 - Conference contribution
SP - 100
EP - 103
BT - 19th World Congress of Soil Science. Soil Solutions for a Changing World
T2 - Soil Solutions for a Changing World
Y2 - 1 August 2010 through 6 August 2010
ER -
ID: 4408531