Open AccessMineral, petrography and petro-geochemical characteristics of diabasic dykes at the Trai Mat quarry, Da Lat City
Author(s) -
Phuc Duc Le
Publication year - 2016
Publication title -
khoa học công nghệ
Language(s) - English
Resource type - Journals
ISSN - 1859-0128
DOI - 10.32508/stdj.v19i1.548
Subject(s) - plagioclase , geology , petrography , geochemistry , biotite , mineral , quartz , pyroxene , mineralogy , carbonate , olivine , chemistry , paleontology , organic chemistry
The diabasic dykes exposed at the Trai Mat quarry, Da Lat city intrude the granitoids of Ankroet complex (such as middle – coarse grained biotite granite and leucogranites. As can be seen in the field the thickess of these dykes vary from 0.5m to nearly 1.5 m extended north-south-east slope angles ranging from ~50 0 to being upright (Orientation of lying 31<50 ÷ 90 o). Petographical components consist of diabaz porphyrite. The main mineral components are plagioclase, pyroxene?, quartz, carbonate, chloride. Chemical components of rocks are: SiO2: 54.34 %, K2O: 2.43 %,Na2O: 2,50 %. The content of W, Pb, U, Th, Hf, Rb, Au is higher