Abstract
The question of whether millennial-scale geological slip rates are consistent with decade-scale geodetic slip rates is of great importance in evaluating the nature of continental deformation within the Tibetan Plateau. We determined the time-averaged slip rate of the Sulu He segment of the Altyn Tagh Fault, near Changma in Gansu Province, China, based on geomorphic analysis, remote sensing data, and cosmogenic 10Be surface-exposure age dating. Quaternary alluvial fan deposits in the study area (Qf1, Qf2, Qf3) are displaced by left-lateral movement along the Altyn Tagh Fault. Because of the large accumulated displacement of these fans, some of them have become disconnected from the fan apexes that are directly linked to the debris-source areas in the piedmont of the Qilian Shan to the south. The total minimum offsets are estimated to be about 429±41m for Qf1, about 130±10m for Qf2, and 32±1m for Qf3. The 10Be surface-exposure ages obtained for Qf1 and Qf2 are 100-112ka and 31-43ka, respectively. Accordingly, the slip rate since the period of Qf1 and Qf2 depositions is calculated to have been about 3.7mm/yr.
| Original language | English |
|---|---|
| Pages (from-to) | 94-106 |
| Number of pages | 13 |
| Journal | Island Arc |
| Volume | 20 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2011 Mar 1 |
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ASJC Scopus subject areas
- Geology
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Constant slip rate during the late Quaternary along the Sulu He segment of the Altyn Tagh Fault near Changma, Gansu, China. / Seong, Yeong Bae; Kang, Hee Cheol; Lee, Jin-Han; Yi, Chaolu; Yoon, Hyeon.
In: Island Arc, Vol. 20, No. 1, 01.03.2011, p. 94-106.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Constant slip rate during the late Quaternary along the Sulu He segment of the Altyn Tagh Fault near Changma, Gansu, China
AU - Seong, Yeong Bae
AU - Kang, Hee Cheol
AU - Lee, Jin-Han
AU - Yi, Chaolu
AU - Yoon, Hyeon
PY - 2011/3/1
Y1 - 2011/3/1
N2 - The question of whether millennial-scale geological slip rates are consistent with decade-scale geodetic slip rates is of great importance in evaluating the nature of continental deformation within the Tibetan Plateau. We determined the time-averaged slip rate of the Sulu He segment of the Altyn Tagh Fault, near Changma in Gansu Province, China, based on geomorphic analysis, remote sensing data, and cosmogenic 10Be surface-exposure age dating. Quaternary alluvial fan deposits in the study area (Qf1, Qf2, Qf3) are displaced by left-lateral movement along the Altyn Tagh Fault. Because of the large accumulated displacement of these fans, some of them have become disconnected from the fan apexes that are directly linked to the debris-source areas in the piedmont of the Qilian Shan to the south. The total minimum offsets are estimated to be about 429±41m for Qf1, about 130±10m for Qf2, and 32±1m for Qf3. The 10Be surface-exposure ages obtained for Qf1 and Qf2 are 100-112ka and 31-43ka, respectively. Accordingly, the slip rate since the period of Qf1 and Qf2 depositions is calculated to have been about 3.7mm/yr.
AB - The question of whether millennial-scale geological slip rates are consistent with decade-scale geodetic slip rates is of great importance in evaluating the nature of continental deformation within the Tibetan Plateau. We determined the time-averaged slip rate of the Sulu He segment of the Altyn Tagh Fault, near Changma in Gansu Province, China, based on geomorphic analysis, remote sensing data, and cosmogenic 10Be surface-exposure age dating. Quaternary alluvial fan deposits in the study area (Qf1, Qf2, Qf3) are displaced by left-lateral movement along the Altyn Tagh Fault. Because of the large accumulated displacement of these fans, some of them have become disconnected from the fan apexes that are directly linked to the debris-source areas in the piedmont of the Qilian Shan to the south. The total minimum offsets are estimated to be about 429±41m for Qf1, about 130±10m for Qf2, and 32±1m for Qf3. The 10Be surface-exposure ages obtained for Qf1 and Qf2 are 100-112ka and 31-43ka, respectively. Accordingly, the slip rate since the period of Qf1 and Qf2 depositions is calculated to have been about 3.7mm/yr.
KW - Altyn Tagh Fault
KW - Cosmogenic Be dating
KW - Displacement
KW - Slip rate
UR - http://www.scopus.com/inward/record.url?scp=79951995411&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=79951995411&partnerID=8YFLogxK
U2 - 10.1111/j.1440-1738.2010.00743.x
DO - 10.1111/j.1440-1738.2010.00743.x
M3 - Article
AN - SCOPUS:79951995411
VL - 20
SP - 94
EP - 106
JO - Island Arc
JF - Island Arc
SN - 1038-4871
IS - 1
ER -