- 责任者：Wang Yinggeng (No.332 Team ; Bureau of Geology and Mineral Exploration of Anhui Province ; Huangshan 245000 ; China) ; Wang Cheng
- 刊名：Geology of Anhui
- 出版年：2013
- 卷期：23(1)
- 页码：p.1-6
- issnNo：ISSN1005-6157
- isbnNo：CN34-1111/P
Lithospheric delamination, lithospheric thinning, asthenospheric uprush, post-orogen extensional development, shallow surface extension and rifted basin development occurred in Huangshan in the late Yanshanian period （mid- and late-Early Cretaceous time） after the Indosinian-early Yanshanian intra=continental orogen, as a result of lithospheric thickening and gravitational instability. In the middle Early Cretaceous, intermediate-acid magmatic activities dominated, but on small scales, mostly and roughly in EW direction; in late Early Cretaceous, owing to intensifying delamination, widespread magmatism mainly formed acid granites, mostly in the form of extensive batholith, meanwhile, volcanic eruptions frequented the shallow-surface rifted basins. Based on regional structural stress field research, calculated stress field feature of the extension developed in late Yanshanian to early Himalayanian period was evidently of a NW-SE extension. The stress field shows NW- SE signature for o~ and sub-horizontality for 02 and 03, thus is a typical extensional kind. The Hymalayanian movement kept uplifting Huangshan, and exposed it to weathering erosion. In the Quaternary, neotectonic movement triggered three times of elevation of Huangshan to different degrees, especially, the early Pleistocene event about 2 Ma ago made the Huangshan mountain body go up abruptly, leading to violent downward cutting of the valleys already developed along joints or rifts, forming up to a thousand meters high granite forests looking up in the sky.