Magmatic Rock Composition On The Influence Of Rare Earth Elements Distribution Coefficient

Composition ofMagmatic rock influencedthe rare earth element distribution coefficient. In thispaper, the research content is different types of volcanic rocks,which are formed frommagmawith the same material source, because ofcrystallization differentiationcaused by the different eruption times. Because these different types of volcanic rocks have the same source, the rare earth elements distribution curve should have the same or similar model, in fact, it is due to the different types of volcanic rock, the distribution curve patterns of rare eartharedifferent. This is the result of the influence of the magmatic rock composition to rare earth elements distribution coefficient. If the effect can be eliminated, different types of volcanic rocks having the same source content source can be traced, this will have significant geological significance.How to eliminate the influence of volcanic rock composition on the distribution coefficient? The relationship between the distribution coefficient and the main elementsneed to be builtand the distribution coefficient should be corrected. First, build a characterization of the main index of amount of ingredientsF= (SiO2+K2O+Na2O)/(SiO2+CaO+MgO), Through the relationship between the main quantity index and REE build index F as a function of relatively rare earth distribution coefficient of D2:D2=f(F), That is to say, knowing the amount of main rock composition can calculate its relative distribution coefficient of D2. By calculating the relative distribution coefficient of D2 of the rare earth elements of the rock line can be corrected, such as D21 corrected to the D22:= La calibration/D21 * D22. This can eliminate the influence of composition on the distribution coefficient and then determine whether the rare earth distribution curves have the same distribution patterns, thus to trace.The author collected and analyses the main data Xiong’er group of regional volcanic article 185 and article 126 of rare earth data, and established the database. Based on the research of the Xiong’er group volcanic rocks, Xiong’er group volcanic rocks considered to be formed from 1.73 to 1.80 Ga, which is a set of volcanic rocks from basic to acid, has obvious rhythm and cycle,and has the same material source. It can be divided into5 classesby lithology:basalt, basaltic andesite and andesite, dacite and rhyolite.The author established the indicatorsto evaluatethe main indexof magmatic rocks: F=(SiO2 +K2O+Na2O)/(SiO2+CaO+MgO).Andbuild relationship between the main component index and the relatively rare earth distribution coefficient D2=f(f). By the research of geological features and geochemical featuresof Xiong’ergroup volcanic rocks the influence of magmatic rocks’composition to the rare earth element distribution coefficientis built. Thisprovides anew methodtracing different types of volcanic rockswhichhave the same material source.The method is not limited to Xiong’er group.