(a) low-fertility sediments; (b) acid igneous rock; (c) limestone and other base-rich rock; (d) volcanic materials; (e) major river basins; (f) flood plains. Reworked Sediments of Extremely Low Fertility Unlike many areas in temperate latitudes, where soils form from material that has ...
This paper gives the petrological and geochemical data of the quartz diorite in the Pengboshan south of Beishan area, Inner Mongolia. Contents of SiO_2 and Al_2O_3 are 55.57~64.80 wt% and 13.76~16.38 wt%respectively. The σ value is between 1.02 and 1.99. K_2O/Na_2O of most sample...
The rock samples display marked enrichment in LREE and LILE (e. g. Rb, Th, U and K), and depleted in some HREE and HFSE (e.g., Nb, Ta, Ti), showing affinities similar to continental arc granites. In addition, the rocks have a homogeneous ISr value (0.708 6-0.708 8) and ...
High-Mg andesites (HMAs) and their cognate intrusive rocks constitute volumetrically very small proportions of the total earth, and are mainly distributed along the edges of convergent plates. Petrogenetic studies can provide possible solutions for discrepancies in the geodynamics and subduction zone evo...
The resource estimation calculated for Kiviniemi intrusion by using 40 g/t Sc cut off value is 13.4 Mt of rock with an average grade of 162.7 g/t scandium, 1726 g/t zirconium, and 81 g/t yttrium.doi:10.1007/s00126-020-00952-2Halkoaho, Tapio...
This age value is also in agreement with that of other syenitic associations from south Brazil, such as the Piquiri Syenite Massive, that records similar chemical signatures. Therefore, these syenitic associations are taken to represent previously metasomatized mantle sources in late post-collisional...
These rocks are enriched in LREEs and LILEs but depleted in HFSEs (Nb, Ta, and Ti), and they show negative zircon 蔚_(Hf)(t) values of 鈥 12.6 to -0.3 and a low whole-rock initial ~(87)Sr/~(86)Sr value of 0.703564. These geochemical features, together with trace element ...
This age value is also in agreement with that of other syenitic associations from south Brazil, such as the Piquiri Syenite Massive, that records similar chemical signatures. Therefore, these syenitic associations are taken to represent previously metasomatized mantle sources in late post-collisional...
The Kd value for the U(VI) sorption onto anoxic diorite in synthetic sp groundwater under anoxic conditions by investigating the sorption isotherm amounts to 3.8±0.6L/kg which corresponds to Ka=0.0030±0.0005cm (grain size 1–2mm). This indicates a weak U sorption onto diorite which can ...
TonaliteDioriteGraniteRadiation shieldingMCNP5For the purpose of this study, four natural rock samples-namely, diorite, granodiorite, tonalite, and granite-are being investigated about their radiation attenuation. The elemental composition of the rocks was obtained through Energy dispersive X-ray ...