ArticleAuthors: Jolivet, Laurent; Maluski, Henri; Beyssac, Olivier; Goffé, Bruno; Lepvrier, Claude; Phan, Truong Thi; Nguyen, Van Vuong (1999)
A large Oligocene-Miocene extensional gneiss dome in Vietnam has implications for the kinematics of the Ailao Shan Red 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 z... 
![Geology Volume 27 issue 1 1999 [doi 10.1130%2F0091-7613%281999%29027%3C0067%3AOMBKEG%3E2.3.CO%3B2] Jolivet, Laurent; Maluski, Henri; Beyssac, Olivier; Goffé, Brun -- Oligocene-Miocene Bu Khang extensi.pdf.jpg](/retrieve/10c4f9f9-feaa-4942-9dee-047403318e92/Geology%20Volume%2027%20issue%201%201999%20%5bdoi%2010.1130%252F0091-7613%25281999%2529027%253C0067%253AOMBKEG%253E2.3.CO%253B2%5d%20Jolivet%2c%20Laurent%3b%20Maluski%2c%20Henri%3b%20Beyssac%2c%20Olivier%3b%20Goff%c3%a9%2c%20Brun%20--%20Oligocene-Miocene%20Bu%20Khang%20extensi.pdf.jpg)