The isotopic composition of H2 (δD = 187‰ to 160‰) is consistent with isotopic equilibrium between H2 and H2O in the conditions of emission. Both the chemistry of the gases and the low δ13C of carbon dioxide (11.6‰, PDB) suggest extensive magma outgassing occurred during the course ...
(1967): Chemical composition of magma and feldspar phenocrysts of the granite porphyry complex (so-called Kumano acidic rocks) in southeastern Kii peninsula, Japan. J. Geol. Soc. Japan 73, 181–191. In Japanese. [Na, Mg, AI, Si, K, Ca, Ti, Mn, Fe, Sr, Ba]. Google Scholar Azz...
Hf isotopic composition of zircons from the Huashan-Guposhan intrusive complex and their mafic enclaves in northeastern Guangxi: Implication for petrogenesis High precision zircon U-Pb dating indicates that main intrusive bodies (Tong'an, Niumiao, Huashan, Lisong), and a mafic microgranular enclave ...
Yoshida M, Katsura T, Kim CK, Aoyagi M, Yoshiike Y (1982) The difference in chemical composition of the 1962 lava from Miyake-jima magma reservoir in Japan. Bull Volcanol 45:81–85Iwasaki, I., Ozawa, T., Yoshida , M., Katsura, T., Kim, C.K., Aoyagi, M. and Yoshiike , Y. ...
addressing the ore body and the ore composition.The ore body is subdivided into the type of pegmatites (pseudopegmatite, metapegmatite, pegmatoid, pegmatite, and plutonic pegmatite), the shape and the structure of pegmatites, while the ore composition is characterized by the chemical and minera...
The mafic lavas of the Azores and Cape Verde Islands are of a highly varied composition, reflecting a complex history of magma genesis and a variety of source compositions. The lavas of the Cape Verde Islands are characteristically highe... GR Davies,RA Cliff,MJ Norry,... - 《Geological So...
We postulate that these features could be reproduced by silica-rich crystal accumulation in a magma reservoir, with a loss of magmatic fluids. The magma associated with W mineralization exhibited a higher level of differentiation compared to the Pb-Zn related magma; however, different groups of ...
Chemicalcompositionofbuildingrawmaterials,chemistryofinorganicbondingcompoundsI. doc.Ing.MilenaPavlíková,Ph.D. K123,D1045 224354688,milena.pavlikova@fsv.cvut.cz tpm.fsv.cvut.cz Overwiev Fundamentalconcepts Buildingrawmaterials:primaryandsecondary
Our melt segregation equilibrium (MSE) experiments are designed to reproduce the local changes in bulk composition that are predicted by the numerical model to occur as buoyant melt migrates upwards along grain boundaries and accumulates to form a magma that leaves the source region. The MSE ...
On the basis of U-Th data Bourdon et al. (2000) suggested that magmas similar to Lower Ajata and Upper Ajata lavas mixed to form the parent magma of most Parinacota samples and they also emphasize the important role of lower crust assimilation. Magmatic processes such as magma mixing, ...