Centimeter-scale magmatic enclaves are abundant in peralkaline felsic volcanic rocks the Sanshui Basin. Their lithology is mainly syenite and syenitic porphyry, they comprise alkali feldspar amphibole, which similar to mineral assemblage of host trachyte comendite. The SiO2 content ~63 wt%, that but lower than Thermobarometric calculations showed crystallized at temperature pressure conditions ...

feldspar grains, as a significant provenance indicator, of two terrigenous formations from central iran, the upper red formation, and moghan area, zivah formation, are used for provenance determination and the study of transportation and depositional history. the upper red formation (urf) is volumetrically the most important siliciclastic unit of the central iran and zivah formation (zf) repres...

misho intrusions outcrop in the southern part of north tabriz fault, east misho mountains, nw tabriz. filed studies, petrological and geochemical data show that both mafic and felsic rock types occur in the area. mafic rocks include gabbro consisting of plagioclase, clinopyroxene, olivine and opaque minerals and felsic bodies consist of alkali granite with k-feldspar, quartz, plagioclase and a ...

the lalezar granitoids crop out within volcanic successions of the urumieh-dokhtar magmatic assemblage (udma). these granitoids have a range from gabbro-diorites to granites in composition. the mineral compositions of the most felsic rocks are characterized by the abundances of na-plagioclase, quartz, alkali feldspar, biotite and hornblende. in the gabbro-diorite rocks, plagioclase (ca-rich), h...

The chemical, morphological and mineralogical properties of two Enon sandy loam (fine, mixed, thermic Ultic Hapludalfs) soilsaprolite profiles, one formed on gabbro and the other on metagabbro, are compared. Clay skins are scarce and stress cutans common in the argillic horizons of these soils. Iron-manganese concretions are concentrated in soil horizons immediately above the argillic horizons....

Mineral weathering in soils is an important source of many nutrients to forest ecosystems. Apatite, a Ca phosphate mineral, occurs in trace amounts in virtually all igneous and metamorphic rocks and is often found as small mineral inclusions in more weathering-resistant silicate minerals. To better understand the distribution of apatite in soils and its exposure to soil solutions, a sequential ...

Previously reported plagioclase detections in the near-IR (NIR) are associated with crater-exposed subsurface materials as well light-toned bedrock plains poor crater retention. Because Fe-bearing has a weak ~1.25 μm feature that can be easily obscured by stronger absorptions most pyroxenes and olivines, candidate lithologies must dominated (e.g., anorthosite) and/or spectrally neutral quartz, ...

Introduction Conclusions References