Abstract
Collision between the North and South China continental blocks began in the Korean peninsula during the Permian (290-260 Ma). The Haemi area in the Hongseong collision belt (proposed as the eastern extension in South Korea of the Dabie-Sulu collision zone of China) within the Gyeonggi Massif comprises post-collisional high Ba-Sr granite with intermediate enclaves that intruded into the Precambrian rocks. The intermediate enclaves have a shoshonitic affinity whereas the granite is a high-K calc-alkaline variety. The chondrite-normalized rare earth element (REE) pattern with relative enrichment of LREE over HREE and absence of a significant negative Eu anomaly typifies both enclaves and granite. Geochemical similarities of enclaves and granite are attributed to the involvement of enriched mantle sources in their genesis. However, dominant crustal components were involved in the formation of high Ba-Sr granites. A granite crystallization age of 233 ± 2 Ma was obtained from SHRIMP U-Pb zircon dating. This age is slightly younger than the Triassic collision event in the Hongseong Belt. Geochemical data, U-Pb zircon age, and regional tectonics indicate that the Haemi high Ba-Sr granite formed in a post-collisional tectonic environment. A Mesozoic post-collisional lithospheric delamination model can account for the genesis of high Ba-Sr granite in the Haemi area.
| Original language | English |
|---|---|
| Pages (from-to) | 266-281 |
| Number of pages | 16 |
| Journal | Island Arc |
| Volume | 18 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2009 Jun 16 |
Fingerprint
Keywords
- Dabie-Sulu
- Haemi
- High Ba-Sr granite
- Hongseong Belt
- Lithospheric delamination
- Post-collisional
ASJC Scopus subject areas
- Geology
Cite this
Petrology, geochronology and tectonic implications of Mesozoic high Ba-Sr granites in the Haemi area, Hongseong Belt, South Korea. / Choi, Seon-Gyu; Rajesh, V. J.; Seo, Jieun; Park, Jung Woo; Oh, Chang Whan; Pak, Sang Joon; Kim, Sung Won.
In: Island Arc, Vol. 18, No. 2, 16.06.2009, p. 266-281.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Petrology, geochronology and tectonic implications of Mesozoic high Ba-Sr granites in the Haemi area, Hongseong Belt, South Korea
AU - Choi, Seon-Gyu
AU - Rajesh, V. J.
AU - Seo, Jieun
AU - Park, Jung Woo
AU - Oh, Chang Whan
AU - Pak, Sang Joon
AU - Kim, Sung Won
PY - 2009/6/16
Y1 - 2009/6/16
N2 - Collision between the North and South China continental blocks began in the Korean peninsula during the Permian (290-260 Ma). The Haemi area in the Hongseong collision belt (proposed as the eastern extension in South Korea of the Dabie-Sulu collision zone of China) within the Gyeonggi Massif comprises post-collisional high Ba-Sr granite with intermediate enclaves that intruded into the Precambrian rocks. The intermediate enclaves have a shoshonitic affinity whereas the granite is a high-K calc-alkaline variety. The chondrite-normalized rare earth element (REE) pattern with relative enrichment of LREE over HREE and absence of a significant negative Eu anomaly typifies both enclaves and granite. Geochemical similarities of enclaves and granite are attributed to the involvement of enriched mantle sources in their genesis. However, dominant crustal components were involved in the formation of high Ba-Sr granites. A granite crystallization age of 233 ± 2 Ma was obtained from SHRIMP U-Pb zircon dating. This age is slightly younger than the Triassic collision event in the Hongseong Belt. Geochemical data, U-Pb zircon age, and regional tectonics indicate that the Haemi high Ba-Sr granite formed in a post-collisional tectonic environment. A Mesozoic post-collisional lithospheric delamination model can account for the genesis of high Ba-Sr granite in the Haemi area.
AB - Collision between the North and South China continental blocks began in the Korean peninsula during the Permian (290-260 Ma). The Haemi area in the Hongseong collision belt (proposed as the eastern extension in South Korea of the Dabie-Sulu collision zone of China) within the Gyeonggi Massif comprises post-collisional high Ba-Sr granite with intermediate enclaves that intruded into the Precambrian rocks. The intermediate enclaves have a shoshonitic affinity whereas the granite is a high-K calc-alkaline variety. The chondrite-normalized rare earth element (REE) pattern with relative enrichment of LREE over HREE and absence of a significant negative Eu anomaly typifies both enclaves and granite. Geochemical similarities of enclaves and granite are attributed to the involvement of enriched mantle sources in their genesis. However, dominant crustal components were involved in the formation of high Ba-Sr granites. A granite crystallization age of 233 ± 2 Ma was obtained from SHRIMP U-Pb zircon dating. This age is slightly younger than the Triassic collision event in the Hongseong Belt. Geochemical data, U-Pb zircon age, and regional tectonics indicate that the Haemi high Ba-Sr granite formed in a post-collisional tectonic environment. A Mesozoic post-collisional lithospheric delamination model can account for the genesis of high Ba-Sr granite in the Haemi area.
KW - Dabie-Sulu
KW - Haemi
KW - High Ba-Sr granite
KW - Hongseong Belt
KW - Lithospheric delamination
KW - Post-collisional
UR - http://www.scopus.com/inward/record.url?scp=66849138409&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=66849138409&partnerID=8YFLogxK
U2 - 10.1111/j.1440-1738.2008.00622.x
DO - 10.1111/j.1440-1738.2008.00622.x
M3 - Article
AN - SCOPUS:66849138409
VL - 18
SP - 266
EP - 281
JO - Island Arc
JF - Island Arc
SN - 1038-4871
IS - 2
ER -