Estimating the elements’ abundance of the exposed crust of Inner Mongolia
Yue-Yue MENG1,2, Yue-Long CHEN1
1. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China 2. China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing 100083, China
We figured out the estimated values of 12 major elements and 40 minor elementsof the exposed crust of Inner Mongolia with 392 samples which are collected from five seismic sections of Inner Mongolia. And the weighted values are obtained by the thickness of different rocks in every stratigraphy and the areas of stratigraphies and magmatic bodies in the geology map. The estimated values are proved reasonable by surface heat flow value, average seismic wave velocity and elements ratio.Comparing the major element estimated values with ones given by other researchers, the average composition of Inner Mongolia is similar to others’, which are also granodioritic, except that the Ca and Mg abundances are a little low. Researching on the estimated values of minor element, rare earth element and some element ratio, we found that there is intense crust differentiation in thenorth margin of North China Plate, and intense accretion inXingmeng Orogenic Belt.
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