, foliated biotite granodiorite and foliated two mica granite. ... the geologic age, mineralogy and texture : Daegang foliated granite, foliated hornblende biotite grandiorite ... and Namweon granites, Jurassic diorite-gabbro and granites, and Cretaceous granites and volcanics.
The chemical compositions of amphibole and biotite from the granitic rocks show systematic variations ... The granitic rocks in the southern part of the Kyeongsang basin, Korea, are divided into seven masses ... The composition of biotite indicates that oxygen fugacity has been almost buffered during crystallization
The biotite age of the granite by K-Ar age dating is 50.1±1.5. ... The Samhwa granite has similar characteristics to masanite of cretaceous granitic rocks of Gyeongsang ... The Samhwa granite belongs to I-type granitoids and magnetite-series granitoids.
It contains biotite(X=pale brown, Y=Z=brown), blue amphibole(X=deep blue, Z=pale to inky blue) and fluorite ... The Naman granite is generally medium to coarse grained hypersolvus granite dominated by pink K-feldspar ... Petrochemically the Namsan granite is distinguished from the Bulgugsa granites of I-type, by higher abundance
rocks distributed in Yuga and Seongsan.myeon are of quartz monzodiorite,granodiorite and monzogranite(granite ... of the rock forming minerals in the intermediate rock, whereas in the acidic rock, in hornblende and biotite ... rock forming minerals, those of plagioclase are narrowly constant, whereas those of hornblende and biotite
These granite dikes are massive, medium-to coarse-grained biotite granites, and their relative ages observed ... The Middle Jurassic granite dike swarm intruding into the Paleoproterozoic banded gneiss is pervasively ... Therefore, the granite dikes intruded into the Middle Jurassic (approximately 167 and 164 Ma), coinciding
The weathered granite has some small and fine cracks around the rock-forming minerals. ... In addition, by the dissolution of biotite containing component there were iron-oxides precipitates
medium-grained biotite granite. ... and medium-grained biotite granite comes from the same source of magma; biotite granite is initiated ... Medium-grained biotite granite consists of K-feldspar, plagioclase, biotite and hornblende as main, and
The mine area is composed of Precambrian granite-gneiss and mica schist, and also Jurassic biotite granite ... granite nearby. ... The sericite was formed by the breakdown of orthoclase, plagioclase, and biotite, respectively.
The geological structure of the subway station regions under this study is characterized by biotite granite ... , alluvium, banded biotite gneiss and diluvium. ... Especially, we expected that the granite areas would have substantially high levels of radon in subway
Biotites occur two type, one is Brown biotite which shows compositional ranges of Mg/Fe+Mg ratios from ... 본 연구는 기존의 반상변정질 편마암을 그 기원과 조직 특성에 따라 잔류반상 화강편마암(blastoporphyritic granite gneiss)으로 명명하였다. ... The blastoporphyritic granite gneiss (BPGN) including much alkali-feldspar megacrysts occurs in Jiri
흑운모화강암 [黑雲母花崗岩, biotite granite] 등립 현정질 암석으로 유색광물이 약 20%로서 우백질이며 석영의 함량이 약 30%로서 산성 심성암(SiO2 66% 이상)입니다 ... 화강암 [花崗岩, granite] 화강암은 석영·칼륨장석(정장석·미사장석) 및 사장석의 조합으로 된 삼각도에서 석영의 양이 10~60% 범위에서, 칼륨장석의 전 장석량에 대한 비율이
Igneous rocks of the Yeosu area consist of diorite, hornblende biotite pite and micrographic granite. ... and volcanic arc granite (VAG). ... The σREE of the granites are 76.2-235 ppm, which corresponds to the range of the continental margin granite
granite intrusion. ... the other hand, Buyeo mine is made by the metasomatic alteration of hydrothermal solution from the biotite ... mine is a weathered residual mine formed by the weathering of K-feldspar megacryst bearing porphyritic granite
, biotite, hornblende, and chlorite. ... They are greyish white porphyritic granites which mainly consist of plagioclase, alkali feldspar, quartz ... In conclusion the two stone heritages in the Seonbonsa temple were made of the Palgongsan granite surrounding
지 형 본 조사지역의 지질은 쥬라기(Juarssic)의 흑운모화강암(Biotite Granite)이 전체적인 기반암(Bed Rock)으로 분포하고 있다. ... 흑운모 화강암(Biotite Granite)은 대체적으로 심한 풍화를 받아 신선한 노두를 발견하기 어려우며 낮은 지형을 이루고 있으며 주로 담홍색이나 유백색, 암회색, 회녹색, 회갈색
mostly feldspar(장석) and quartz(석영) Small amount of black biotite(흑운모) or hornblende(각섬석) Granite: The ... Example: Granite The crystals in granite are clearly visible. ... Commonly gray or green Plagioclase feldspar(사장석) + dark minerals(biotite(운모), amphibole(각섬석), pyroxene
granite, and Cretaceous acidic and mafic dykes. ... unknown age plutonic rocks which intruded PreCambrian Yoogoo gneiss, and were intruded by Jurassic biotite