Notes on the anatexis of some metamorphic rock types of the late Archaean Fuping Group of northwestern Pingshan, Hebei Province, China[J].Proc 1997,and 30th Int,l Geol Congr,1997.173-185.Cheng Yuqi,Gao Jifeng,Wan Yusheng. Notes on the anatexis of some metamorphic rock types of the Late ...
P- and S-wave velocities in crustal and mantle rocks under the simultaneous action of high confining pressure and high temperature and the effect of rock microstructure The compressional and shear wave velocities, Vp and Vs, in igneous and metamorphic rocks typical of the crust and mantle, were...
Several types of migmatitic rocks have been recognized: (1) leucosomes associated with ... P Barbey,J Macaudiere,JP Nzenti - 《Journal of Petrology》 被引量: 147发表: 1990年 Origin of K-poor leucosomes in a metasedimentary migmatite complex by ultrametamorphism, syn-metamorphic magmatism ...
Rhenium and osmium abundances in fourteen igneous and metamorphic rocks are reported. The values found range between 0.1 and 24 × 10−10 g/g Re and ⩽0.2 to 59 × 10−10 g/g Os. The two elements are inversely correlated and this is especially noticeable in a suite of four rocks ...
Metamorphic rocks are produced from igneous and sedimentary rocks that have been altered by high temperature and great pressure. Examples : limestone changes into marble and sandstone into quartzite. Mistletoe Infection Classification System (modified from Hawksworth, 1977) To determine the degree of ...
rocks of the Point Reyes area___ Setting and general description.___ Microscopic description___ Granodiorite of Point Reyes.___ Alaskite and aplite___ Metamorphic rocks.___ Distinguishing features.___ Granodiorite of Southeast Farallon Island-___ Granitic rocks of Montara Mountain..___ Baseme...
aIts core is composed of too HuaQun metamorphic rocks, in the north of the workspace, the two wings open, composed of bear ear group volcanic rocks. 其核心也由 HuaQun 组成变形的岩石,在工作区北部,二只翅膀开始,由狗熊耳朵团体火山岩组成轻摇。[translate] ...
There are charnockites of different geological ages and of different modes of formation. The prevalence of enderbites in southern India is probably due to the conversion of early tonalitic rocks in the high grade metamorphic terrains. 展开 ...
The oldest rocks are granites and gneisses, followed by various types of metamorphic, magmatic and sedimentary rocks. Depending on the paleorelief conditions and related paleogeological relations, this complex is unconformably overlain by the younger, Upper Tertiary sedimentary complex, beginning with ...
The results of mineralogical composition of sand fraction showed that the dominant minerals, in the light part of sand fraction, were carbonate rock fragments , qurtz , chert , mudstone rock , feldspars , igeous and metamorphic rocks . While , the heavy part showed a similarities in terms of...