The pluton ranges from olivine gabbros (mostly at the northern end) to quartz monzonites, with monzonites the most abundant rock type. Minor felsic rocks in the form of quartz microsyenites and monzogranite occur more toward the southern end. The comparatively unaltered gabbro/monzonite has ...
1.27. The characteristics of the attenuation and dispersion of stress waves in rocks are useful in rock engineering such as ground vibration control. This will be discussed in chapter: Reduction of Ground Vibrations. Sign in to download full-size image Figure 1.25. Vertical particle velocities ...
The Asiha diorite in Dulan County is batholith shaped output. The whole rock samples have characteristics by SiO2(56.82%~61.15%), rich alkali (Na2O+K2O=5.31%~6.02%), low total iron (TFeO=6.09%~6.65%) and low TiO2(1.02%~1.25%). Therefore, the diorite belongs to of high-K calc-alka...
The results of trace element analysis showed that it had the characteristics of enrichment of large ion lithophile elements such as Rb, Sr, Ba and Pb and depletion of high field strength elements such as Ta, Nb and Ti, and it was formed in volcanic arc tectonic environment. The diorite ...
Google Share on Facebook granodiorite (redirected fromGrandiorite) Encyclopedia gran·o·di·o·rite (grăn′ə-dī′ə-rīt′) n. A coarse-grained igneous rock consisting primarily of quartz, plagioclase feldspar, and potassium feldspar, and also containing biotite, hornblende, or pyroxene. ...
The geochemical characteristics of the studied plutonic rocks demonstrate the role of contrasting sources for the tonalites and sanukitoid suites in the Kuhmo district.Asko K?pyahoThe Geological Society of FinlandKa¨pyaho, A. 2006. Whole-rock geochemistry of some tonalite and high Mg/Fe ...
(HFSEs)such as Nb, Ta, P and Ti.The geochemical composition indicates that the rock has the genetic characteristics of the subduction zone.The zircon U-Pb age and petrogenesis of the quartz diorite prove that it is the earliest arc magmatic record that was first discovered in the Late ...
and the whole-rock geochemical data indicate that the diorite porphyrites are metaluminous to weakly peraluminous and high-K calc-alkaline series. The characteristics of highly initial87Sr/86Sr ratios (0.708 16 to 0.710 47), negativeεNd(t) (−8.9 to −8.4), and negativeεHf(t) (−...
The Characteristics and ore-controlling regularity of the diorite-dyke in Resui Gold Deposit of Ningcheng,Inner Mongolia; 内蒙古宁城热水金矿闪长岩脉特征及其控矿规律5) diorites 闪长岩类 1. , the petrogenetic geodynamic environments, origins of the rock-forming materfal, features of the source...
2022Rock fracture after high temperature is always a hot topic in the field of rock engineering. However, the mixed mode I/III fracture characteristics of ... Z Yang,T Yin,D Zhuang,... - 《Theoretical & Applied Fracture Mechanics》 被引量: 0发表: 2022年 ...