Primary low-T S-type granites, which form mainly by fluid-absent muscovite melting, may acquire a significant enrichment in Pb when compared to higher-T S-type granites for a given Ba content. We consider the following factors are responsible for this enrichment: Muscovite is a major carrier ...
Petrographic and element geochemical features show that these plutons are typicalS-type granites. 岩石学及元素地球化学结果显示:上述三个岩体为典型S型花岗岩;高I_(Sr)(>0。 2. The study of NeoarcheanS-type granite,with obvious tectonic significance,which lies in Hejiao area,Darhan Muminggan Lianhe...
Field, whole-rock geochemical and isotopic data are consistent with the generation of the S-type granites by melting their Dalradian Supergroup country rocks. While Hf isotope compositions of magmatic zircon, U–Pb data of inherited zircons, and high mean zircon δ 18 O values of 9.0±2.7‰ ...
(S-) type granites. This finding provides clear evidence for rocks other than the trondhjemite-tonalite-granodiorite suite in the Earth’s earliest continental crust. Considering that I- and S-type granites are typical of modern convergent plate margins, the presence of a high proportion of Jack...
The older S-type granites in the LSC are interpreted to record a subduction-related tectonic setting, whereas the younger ones are related to a syn-collisional setting. This scenario reflects a critical geodynamic transition during the assembly of the Columbia supercontinent at ca. 2.04–1.95 Ga ...
Chemically, the S-type granites are lower in Na, Ca, Sr and Fe<sup>3+</sup>/Fe<sup>2+</sup>, and higher in Cr and Ni. As a consequence, the S-types are always peraluminous and contain Al-rich minerals. A little over 50% of the I-type granites are metaluminous and these ...
Source rocks of the I- and S-type granites were undersaturated or oversaturated in Al, respectively, and the more mafic granites share that characteristic with their source. As the magmas of the Boggy Plain Supersuite evolved progressively by fractional crystallization, the rocks trended towards ...
Du Yangsong, Collerson, K. D., Zhao Jianxin et al., Characteristics and petrogenesis of granulite enclaves in S-type granites in the junction of Guangdong and Guangxi provinces, Acta Petrologica Sinica, 1999, 15(2): 309―314.
As S-type granites usually contain abundant monazite and the electron microprobe (EMP) provides better spatial resolution for spot analysis, the EMP chemical analysis on monazite grains becomes a powerful supplementary dating system (Hokada and Motoyoshi, 2006). Also, because robust dating is ...
Chen,F,Siebel,W,Satir,M.Geochemical and isotopic composition and inherited zircon ages as evidence for lower crustal origin of two Variscan S-type granites in the NW Bohemian massif. Int J Earth Sci . 2003Geochemical and isotopic composition and inherited zircon ages as evidence for lower ...