Rocks: Galleries of igneous, sedimentary and metamorphic rock photos with descriptions. Minerals: Information about ore minerals, gem materials and rock-forming minerals. Volcanoes: Articles about volcanoes, volcanic hazards and eruptions past and present. Gemstones: Colorful images and articles about diam...
Diorite, medium- to coarse-grained intrusive igneous rock that commonly is composed of about two-thirds plagioclase feldspar and one-third dark-coloured minerals, such as hornblende or biotite. The presence of sodium-rich feldspar, oligoclase or andesine
diorite- a granular crystalline intrusive rock igneous rock- rock formed by the solidification of molten magma Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc. Want to thank TFD for its existence?Tell a friend about us, add a link to this page...
Based on the study of LA-ICP-MS zircon U-Pb geochronology and whole-rock geochemistry for theLuojiazhuang diorite porphyries in Menying , western Shandong , the analyzed zircons exhibit oscillatory zoning in the cathodoluminescence images and have high Th/U ratios (0. 15-1.53) , indicating a...
Figure 4. Major element diagrams for rock types of Baiheshan quratz diorite 下载: 全尺寸图片 幻灯片 石英闪长岩稀土元素总量为127×10-6~148×10-6,(La/Yb)N值为4.28~5.60,平均为4.79,HREE/LREE值为2.00~2.51,平均为2.21,具有弱负Eu异常(0.86~0.99,平均0.92),反映岩浆结晶过程中斜长石的分离结晶作...
The rock units exposed in the area include gossan, marble, Hulayfah volcanics, diorite–tonalite, gneissose granite, and alkali granite. Gold mineralization at Bulghah mine is hosted mainly by Syn- to Late-tectonic diorite–tonalite intrusion aligned along N–S direction and is associated mainly...
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...
PaleoproterozoicdioriteporphyrygeochronologygeochemistrywesternShandongBased on the study of LA-ICP-MS zircon U-Pb geochronology and whole-rock geochemistry for theLuojiazhuang diorite porphyries in Menying , western Shandong , the analyzed zircons exhibit oscillatory zoning in the cathodoluminescence images an...
In the mountainous Rio Icacos watershed in northeastern Puerto Rico, quartz diorite bedrock weathers spheroidally, producing a 0.2–2 m thick zone of partially weathered rock layers (2.5 cm thickness each) called rindlets, which form concentric layers around corestones. Spheroidal fracturing ...
Zircon LA-ICP-MS U-Pb ago and whole-rock geochemistry data are presented for the Dongxigao dioritoporphyries in Pingyi , western Shandong , to restrict its petrogenesis. The zircons from the Dongxigao dioriteporphyries exhibit striped absorption and oscillatory growth zoning in the ...