Abstract
Early Jurassic sandstones and shales were collected at 14 sites from the Kimpo area in the western part of the Korean Peninsula for a palaeomagnetic study. A characteristic remanent magnetization component, which passes the fold test, was isolated from seven sites. This characteristic component is interpreted to be of primary Early Jurassic origin because the folding age is Middle-Late Jurassic. The primary directions, together with previously reported ones, provide a mean direction (D = 38.1°, I = 39.7°,α95 = 3.8°, 11 sites) and a palaeomagnetic pole (54.1° N, 230.2° E, A95 = 4.1°) for the Kimpo area. This palaeomagnetic pole shows good agreement with the coeval poles for the South China Block and is significantly removed from that for the North China Block, suggesting that the Kimpo area has been part of the South China Block since at least Early Jurassic times. The Kimpo area constitutes a part of the lmjingang Belt which is palaeontologically allocated to the South China Block in its origin, while all Precambrian tectonic blocks that compose the basement of the Korean Peninsula are interpreted to be of North China origin. We conclude that the Imjingang Belt, including the Kimpo area, is a tectonic extension of the South China Block on the Korean Peninsula. The South China elements were obducted onto the North China Block at the site of the present Korean Peninsula during the collision event of the North and South China Blocks, and hence the Korean Peninsula is composed of areas with both North and South China affinities.
| Original language | English |
|---|---|
| Pages (from-to) | 446-456 |
| Number of pages | 11 |
| Journal | Geophysical Journal International |
| Volume | 158 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Aug 2004 |
| Externally published | Yes |
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Keywords
- Chinese blocks
- Korea
- Palaeomagnetism
- Tectonics
ASJC Scopus subject areas
- Geochemistry and Petrology
- Geophysics
Cite this
Tectonic elements with South China affinity in the Korean Peninsula : New Early Jurassic palaeomagnetic data. / Uno, Koji; Chang, Tae Woo; Furukawa, Kuniyuki.
In: Geophysical Journal International, Vol. 158, No. 2, 08.2004, p. 446-456.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Tectonic elements with South China affinity in the Korean Peninsula
T2 - New Early Jurassic palaeomagnetic data
AU - Uno, Koji
AU - Chang, Tae Woo
AU - Furukawa, Kuniyuki
PY - 2004/8
Y1 - 2004/8
N2 - Early Jurassic sandstones and shales were collected at 14 sites from the Kimpo area in the western part of the Korean Peninsula for a palaeomagnetic study. A characteristic remanent magnetization component, which passes the fold test, was isolated from seven sites. This characteristic component is interpreted to be of primary Early Jurassic origin because the folding age is Middle-Late Jurassic. The primary directions, together with previously reported ones, provide a mean direction (D = 38.1°, I = 39.7°,α95 = 3.8°, 11 sites) and a palaeomagnetic pole (54.1° N, 230.2° E, A95 = 4.1°) for the Kimpo area. This palaeomagnetic pole shows good agreement with the coeval poles for the South China Block and is significantly removed from that for the North China Block, suggesting that the Kimpo area has been part of the South China Block since at least Early Jurassic times. The Kimpo area constitutes a part of the lmjingang Belt which is palaeontologically allocated to the South China Block in its origin, while all Precambrian tectonic blocks that compose the basement of the Korean Peninsula are interpreted to be of North China origin. We conclude that the Imjingang Belt, including the Kimpo area, is a tectonic extension of the South China Block on the Korean Peninsula. The South China elements were obducted onto the North China Block at the site of the present Korean Peninsula during the collision event of the North and South China Blocks, and hence the Korean Peninsula is composed of areas with both North and South China affinities.
AB - Early Jurassic sandstones and shales were collected at 14 sites from the Kimpo area in the western part of the Korean Peninsula for a palaeomagnetic study. A characteristic remanent magnetization component, which passes the fold test, was isolated from seven sites. This characteristic component is interpreted to be of primary Early Jurassic origin because the folding age is Middle-Late Jurassic. The primary directions, together with previously reported ones, provide a mean direction (D = 38.1°, I = 39.7°,α95 = 3.8°, 11 sites) and a palaeomagnetic pole (54.1° N, 230.2° E, A95 = 4.1°) for the Kimpo area. This palaeomagnetic pole shows good agreement with the coeval poles for the South China Block and is significantly removed from that for the North China Block, suggesting that the Kimpo area has been part of the South China Block since at least Early Jurassic times. The Kimpo area constitutes a part of the lmjingang Belt which is palaeontologically allocated to the South China Block in its origin, while all Precambrian tectonic blocks that compose the basement of the Korean Peninsula are interpreted to be of North China origin. We conclude that the Imjingang Belt, including the Kimpo area, is a tectonic extension of the South China Block on the Korean Peninsula. The South China elements were obducted onto the North China Block at the site of the present Korean Peninsula during the collision event of the North and South China Blocks, and hence the Korean Peninsula is composed of areas with both North and South China affinities.
KW - Chinese blocks
KW - Korea
KW - Palaeomagnetism
KW - Tectonics
UR - http://www.scopus.com/inward/record.url?scp=4344582824&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=4344582824&partnerID=8YFLogxK
U2 - 10.1111/j.1365-246X.2004.02299.x
DO - 10.1111/j.1365-246X.2004.02299.x
M3 - Article
VL - 158
SP - 446
EP - 456
JO - Geophysical Journal International
JF - Geophysical Journal International
SN - 0956-540X
IS - 2
ER -