Cenozoic exhumation of the Neoproterozoic Sanfang batholith in South China
| العنوان: | Cenozoic exhumation of the Neoproterozoic Sanfang batholith in South China |
|---|---|
| المؤلفون: | Shuang-Li Tang, Ling-Xiao Gong, Feng Chen, Dan-Ping Yan, Yixi Zhang, Liang Qiu |
| المصدر: | Journal of the Geological Society. 177:412-423 |
| بيانات النشر: | Geological Society of London, 2019. |
| سنة النشر: | 2019 |
| مصطلحات موضوعية: | 010504 meteorology & atmospheric sciences, Proterozoic, Geology, 010502 geochemistry & geophysics, Fission track dating, Neogene, 01 natural sciences, Thermochronology, Paleontology, Basement (geology), Batholith, Extensional tectonics, Paleogene, 0105 earth and related environmental sciences |
| الوصف: | The 1500-km-long Jiangnan tectonic belt in China is well known for large outcrops of Proterozoic basement rocks, although the exhumation history of the exposed basement is poorly constrained. The thermochronology of the Sanfang batholith in the southernmost section of this belt was used to constrain the timing and mechanism of exhumation using apatite fission track analysis of granite samples collected along three transects. The results show that the ages of single apatite grains are much younger than the Neoproterozoic crystallization age of the Sanfang batholith. The apparent age v. elevation diagram shows two-stage cooling during the Paleogene and Miocene. The cooling stages are coincident with unconformities between the Paleogene and underlying strata, and between the Neogene and the Paleogene, with movement on high-angle normal faults. A compilation of apatite fission track data from this and previous studies suggests that the batholith was exhumed in the Cenozoic and the timing of rapid cooling is progressively younger to the east as a result of slab rollback leading to Cenozoic back-arc extension. The exhumation of the Sanfang batholith therefore indicates that Cenozoic erosion and extensional tectonics played a key part in exhuming the basement rocks and forming the present architecture of the Jiangnan tectonic belt. |
| تدمد: | 2041-479X 0016-7649 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::352c0bd58916ec31a458f8a79e760bbd https://doi.org/10.1144/jgs2019-041 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........352c0bd58916ec31a458f8a79e760bbd |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 2041479X 00167649 |
|---|