Wang Guozhi(Journal of Earth Science)Thermochronologic Constraints on Uplifting Events since the Early Cretaceous in the North Margin of the Luxi Rise, Eastern China
日期:2013年09月05日 01:48:00
 

标题:Thermochronologic Constraints on Uplifting Events since the Early Cretaceous in the North Margin of the Luxi Rise, Eastern China

作者:Wang, Guozhi; Liu, Shugen; Zou, Can

期刊:JOURNAL OF EARTH SCIENCE,2013,24(4),579-588

WOS000322751800011

摘要:Two Ar-40/Ar-39 ages and six fission track ages from monzonite and the Jurassic-Cretaceous rocks provide new geochronologic constraints on the timing of uplifting events in the north margin of the Luxi rise, eastern China. Ar-40/Ar-39 age 111.1 +/- 2.4 and 111.2 +/- 2.5 Ma of biotite and K-feldspar sampled from the monzonite may record the cooling age at 300 and 150-300 degrees C, respectively. Fission track ages of zircon and apatite from the monzonite changing from 75 +/- 7 to 40 +/- 3 Ma record the cooling age at 250 and 120 degrees C, respectively. The apatite from the Jurassic Cretaceous sandstone and volcanic rocks yielded a different 74 path. The results indicate that there are two phases 111-46.9 and 13.4 (6.5)-0 Ma of rapid uplifting happened to the north margin of the Luxi rise; the first one is a tilted uplift from north to south in Zibo during 111-46.9 Ma and in the south in Mengshan during 70-40 Ma; the second one is a tilted uplift from south to north in Mengshan during 32-20 Ma, and in turn in Taishan and Zibo during 23-20 and 13.4-0 or 6.5-0 Ma, respectively. The aging coincidence between magmatism and tectonic uplifting implies there are two phases of uplifting induced by large scale extension and lithospheric thinning.