Status And Geochemical Characteristics Of The Constructional Aggregate In Gangwon Area

This study was conducted to analyze the status and to evaluate the geochemical characteristics of the constructional aggregate using its mineral compositions and major component contents in Gangwon area. In 2016, Gangwon Province produced 22,659 m(3)/year aggregate which is 6.4 times bigger than 2005 production. In 2018, 140 companies were registered as the aggregate suppliers in Gangwon Province. The aggregate products are used in manufacturing remicon (40.3 %), road subbase (15.3 %), and ascon (8.1 %). In this study, the aggregate was classified into sand and gravel and 117 samples were collected from 85 aggregate companies to analyze mineral compositions and major component compositions. Sand and gravel are mainly composed of quartz (14.3 similar to 84.3%), plagioclase (0 similar to 42.9%), K-feldspar (0 similar to 31.1%), muscovite (0 similar to 24.8%), and biotite(0.4 similar to 20.3%). Sand did not show any tendency of variation against with SiO2 content change, but in gravel, Al2O3, K2O and Na2O were increased with SiO2 content increase and CaO and L.O.I. decreased. Because this study was conducted on the products which were mixture of the samples that had experienced different geological processes, there was a limit to understanding the petrogenesis, evolution, and weathering of the rocks.