Go to the main menu
Skip to content
Go to bottom
REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
The Journal of the Petrological Society of Korea
Journal Basic Information
Journal DOI :
Petrological Society of Korea
Editor in Chief :
Volume & Issues
Volume 18, Issue 4 - Dec 2009
Volume 18, Issue 3 - Sep 2009
Volume 18, Issue 2 - Jun 2009
Volume 18, Issue 1 - Mar 2009
Selecting the target year
Long-term Variation of Radon in Granitic Residual Soil at Mt. Guemjeong in Busan, Korea
Moon, Ki-Hoon ; Kim, Jin-Seop ; Ahn, Jung-Keun ; Kim, Hyun-Chul ; Lee, Hyo-Min ;
The Journal of the Petrological Society of Korea, volume 18, issue 4, 2009, Pages 279~291
Radon is a natural radionuclide originated from radioactive decay of radium in rocks and soil. It is colorless, odorless and tasteless elements that mainly distributed as gaseous phase in soil pore space. The present study analyzed the characteristics of long-term radon variation in granitic residual soil at Mt. Guemjeong in Guemjeong-gu, Busan and determined the effects of atmospheric temperature, rainfall and soil temperature and moisture. Periodic measurements of radon concentrations in soil gas were conducted by applying two types of in-situ monitoring methods (chamber system and tubing system). Radon concentration in soil gas was highest in summer and lowest in winter. The variations in soil temperature and atmospheric temperature were most effective factors in the long-term radon variations and showed positive co-relations. The air circulation between soil air and atmosphere by the temperature difference between soil and atmosphere was analyzed a major cause of the variation. However, other factors such as atmospheric pressure, rainfall and soil moisture were analyzed relatively less effective.
Movement History of Faults Considered from the Geometric and Kinematic Characteristics of Fracture System in Gilan-cheongsong Area, Gyeongsang Basin, Korea
Lee, Deok-Seon ; Kang, Ji-Hoon ;
The Journal of the Petrological Society of Korea, volume 18, issue 4, 2009, Pages 293~305
The Gilan-Cheongsong area, which is in contact with Yeongyang and Uiseong Blocks of Gyeongsang Basin, Korea, consists of Precambrian metamorphic rocks, Triassic Cheongsong granite, Cretaceous sedimentary rocks(Iljik, Hupyeongdong, Jeomgok Formations), and Cretaceous igneous rocks(andesite, quartz porphyry, felsite). In this area are developed faults trending in (W)NW, NNW, ENE, NS, (N)NE directions which are representative in the Gyeongsang Basin. We analyzed the geometric and kinematic characteristics of fracture systems to inquire into movement history and sense of these faults in this area. This study suggests that these faults were mainly strike-slip movement. The orientations of fracture sets show ENE, NNW, (W)NW, (N)NE, NS in descending order of frequency. Their prolongation presents (W)NW, NNW, ENE, (N)NE, NS in descending order of predominance, and also agrees with that of faults in this area. The development sequence and movement sense of fracture sets are summarized as follows; (1) (W)NW: dextral shearing
(2) (W)NW and NNW: conjugate shearing(the former: dextral, the latter: sinistral)
(3) NNW: dextral shearing
(4) (W)NW: sinistral shearing
(5) ENE: dextral shearing
(6) ENE and NS: conjugate shearing(the former: sinistral, the latter: dextral)
(7) (N)NE: sinistral shearing, and this result is closely associated with the development sequence and movement sense of faults developed in this area.
Field Study of Zapla Iron Ore Deposit in Argentina
Pak, Sang-Joon ; Lee, Han-Yeang ;
The Journal of the Petrological Society of Korea, volume 18, issue 4, 2009, Pages 307~314
Zapla iron ore bodies in Jujuy state, northern Argentina are located within Paleozoic Silurian marine sedimentary rocks and can be categorized into ironstone deposit. Iron ores contain oolitic hematite as main iron mineral as well as siderite and chamosite. Hematite replaced biotite and/or muscovite along their cleavage or grain boundary, which indicates hematite is precipitated by chemical reaction. Silurian basins in northern Argentina has high potential resources for ironstone deposit but economic aspects of ore body can be controlled by magnitude of lateral vertical extensions and local grade variation of iron beds.
Distributional Characteristics of Microcrack in Tertiary Crystalline Tuff from Northeastern Gyeongsang Basin
Park, Deok-Won ; Lee, Chang-Bum ;
The Journal of the Petrological Society of Korea, volume 18, issue 4, 2009, Pages 315~336
We have studied the orientational characteristics of microcrack frequency, it's length and density in Tertiary crystalline tuff from the northeastern part of the Gyeongsang Basin. 134 sets of microcracks on horizontal surfaces of 3 rock samples from Heunghae-eup were distinguished by enlarged photomicrographs of the thin sections. The variability in patterns among microcrack length-frequency histograms for three rock samples from different altitudes were derived. The pattern of histograms changes progressively from negative exponential form to log-normal form in proportion to altitude. The distribution pattern for rock sample no.1 from lower altitude shows the broad length distribution characterized by higher mean and median, and higher standard deviation. Meanwhile, this distribution pattern corresponds with characteristics of joint length distribution in sedimentary rocks of the lower part of the Gyeongsang Supergroup. The occurrence frequency of shorter microcracks increases toward both NW and NE directions from the
, with the dominant direction of
, respectively. This distribution pattern represents the relative differences in formation timing among microcrack sets and the result of the new initiation of shorter microcracks. Meanwhile, the longest microcracks within
:1.18 mm) and
:0.80 mm) directions are seen, but this kind of microcracks are very limited in number. Whole domain of the directional angle(
)-frequency(N), length(L) and density(
) chart can be divided into five sections in terms of phases of the distribution of related curves. From the distribution chart, density curve shows five distinct peaks in the WNW-ESE(
), and nearly EW(
) directions, respectively. Especially, main directions of faults correspond with the directional angle showing high density. Consequently, these distribution patterns of density curve reflect the representative maximum principal stress orientations suggested in previous studies.
Glass Inclusions in Quartz Phenocrysts of Tuff from Sunshin Au Mining Area, Haenam, Jeonnam.
Lee, Seung-Yeol ; Yang, Kyoung-Hee ; Jeon, Byung-Geun ; Bak, Gil ; Koh, Sang-Mo ; Seo, Jeong-Ryul ;
The Journal of the Petrological Society of Korea, volume 18, issue 4, 2009, Pages 337~348
Clear and homogeneous glass inclusions are well preserved at the rim of the quartz phenocrysts of tuff from Sunshin epithermal Au deposit, Haenam, although the host rocks experienced extensive silicification and argillic alteration. Glass inclusion vary in size from
to larger than
consisting of glass(60~80 vol%) + vapor bubble(15~30 vol%)
daughter crystals(<10 vol%). Most of glass inclusions are cubic to rectangular in shape, indicating that the host quartz grew in the stability field of
-quartz. All the glass inclusions appear to be primary. Glass inclusions are composed of highly evolved high-K calc-alkaline rhyolites, which can represent the final liquidus phase of the magma system. The
concentration (<0.30 wt%) is trivial in the glass, indicating there was no enrichment in the final residual melt. Textural characteristics suggest that magma was water-saturated shortly before or during the eruption.
content of the glass (ca. 2-4 wt%) suggests a water saturation pressure(
) of about 300-900 bars. This pressure implies a minimum depth of 0.8-2.5 km for the magma chamber.
Petrology of the Mt. Dungjuribong Volcanic Complex, Gurye-gun, Southwest of Ryeongnam Massif
Koh, Jeong-Seon ; Yun, Sung-Hyo ; Kim, Young-La ;
The Journal of the Petrological Society of Korea, volume 18, issue 4, 2009, Pages 349~370
The Mt. Dungjuribong Volcanic Complex located in Gurye-gun, southwest of Ryeongnam massif, composed of Cretaceous andesitic rocks and rhyolite.
contents of the volcanic rocks range from 52.0 to 78.5 wt.%. The major and trace elements composition, REE patterns and tectonomagmatic discrimination diagrams of volcanic rocks suggest that they are typical of continental margin arc calc-alkaline rocks produced in the subduction environment. The phenocrysts of the volcanic rocks show that they had gone in disequilibrium state, such as reversal zoning and resorbed core of plagioclase, reaction rim around pyroxene and resorbed margins of quartz, which showing the evidence of magma mixing during the evolution of magma.
Introduction of Profile of Foreign Mining Company, Yamana Gold, in Argentina
Lee, Han-Yeang ;
The Journal of the Petrological Society of Korea, volume 18, issue 4, 2009, Pages 371~379
A famous foreign mining company in Argentina, Yamana Gold, its profile including company history, current and future mining projects, and production are introduced in this paper for the Korean mining companies those are sincerely looking for reliable collaborative partners to deliver the practical company informations.