| Ref ID: | 28413 |
|---|---|
| Ref Type: | Journal Article |
| Authors: | Jolivet, Laurent Maluski, Henri Beyssac, Olivier Goffé, Bruno Lepvrier, Claude Thi, Phan Truong Vuong, Nguyen Van |
| Title: | Oligocene-Miocene Bu Khang extensional gneiss dome in Vietnam: geodynamic implications |
| Date: | 1999 |
| Source: | Geology |
| DOI: | 10.1130/0091-7613(1999)027<0067:OMBKEG>2.3.CO |
| Abstract: | A large Oligocene-Miocene extensional gneiss dome in Vietnam has implications for the kinematics of the Ailao ShanRed River shear zone and rifting of the South China Sea. A major northeast-dipping extensional shear zone separates the Bu Khang dome from less-metamorphosed units above. Shearing deformation occurred during the exhumation of high-pressure rocks. 40Ar-39Ar ages on micas reveal Oligocene-Miocene ages, from 36 to 21 Ma. After a high-pressure episode of probable Oligocene age, the area was subjected to northeast-southwest extension during the opening of the South China Sea. A kinematic model involving left-lateral shear and block rotation within a north-south dextral shear zone integrates our observations in the Bu Khang dome with South China Sea rifting. |
| Identifier: | 2 |
| Date Created: | 2/8/2012 |
| Volume: | 27 |
| Number: | 1 |
| Page Start: | 67 |
| Page End: | 70 |