气候变化领域集成服务门户(CCPortal): Timing and Magnitude of Progressive Exhumation and Deformation Associated with Eocene Arc-Continent Collision in the NE Caribbean Plate

CCPortal

DOI	10.1130/B35715.1
	Timing and Magnitude of Progressive Exhumation and Deformation Associated with Eocene Arc-Continent Collision in the NE Caribbean Plate
	Román Y.A.; Pujols E.J.; Cavosie A.J.; Stockli D.F.
发表日期	2021
ISSN	167606
起始页码	1256
结束页码	1266
卷号	133
英文摘要	Puerto Rico and the northern Virgin Islands together preserve a unique archive of island arc construction and plate margin deformation along the northeastern edge of the Caribbean plate. In Eocene times, arc-continent collision of the Caribbean plate and the North American plate led to transpressional deformation along two major fault systems in Puerto Rico, resulting in an island-wide depositional hiatus. Although styles and kinematics of this deformational event are seemingly well understood, the lack of chronologic constraints have left uncertainties related to the timing of inception and activity, the magnitude of crustal exhumation, and the character of deformation (i.e., progressive or polyphase). New zircon and apatite (U-Th)/He ages reveal that deformation associated with arc-continent collision started in the early Eocene (ca. 52 Ma) and ended in the early Oligocene (ca. 29 Ma). Over this 23 m.y. time frame, deformation was not restricted to major faults, instead it propagated gradually eastward, with punctuated episodes of vertical exhumation in the early Eocene (ca. 52–34 Ma) and late Eocene (ca. 36–29 Ma). In contrast, the northern Virgin Islands experienced rapid cooling and exhumation in the early Miocene (ca. 24–21 Ma) associated with the extensional opening of the Anegada Passage. The modeled thermal histories for the central and northeastern part of Puerto Rico indicate collision-related peak transpressional deformation between 36 and 29 Ma and an average exhumation rate 0.9 ± 0.6 km/m.y. These results represent the first direct constraints on the timing and magnitude of collisional exhumation and offer insights into the deformational evolution of the northeastern edge of the Caribbean plate. © 2020 Geological Society of America
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184667
作者单位	Department of Geological Sciences, The University of Texas, Austin, Texas 78712, United States; Department of Geology, The University of Puerto Rico, Mayagüez, Puerto Rico; Department of Earth and Space Sciences, Lamar University, Beaumont, Texas 77705, United States; Space Science and Technology Centre and The Institute for Geoscience Research, School of Earth and Planetary Science, Curtin University, Perth, Western Australia 6102, Australia
推荐引用方式 GB/T 7714	Román Y.A.,Pujols E.J.,Cavosie A.J.,et al. Timing and Magnitude of Progressive Exhumation and Deformation Associated with Eocene Arc-Continent Collision in the NE Caribbean Plate[J],2021,133.
APA	Román Y.A.,Pujols E.J.,Cavosie A.J.,&Stockli D.F..(2021).Timing and Magnitude of Progressive Exhumation and Deformation Associated with Eocene Arc-Continent Collision in the NE Caribbean Plate.Bulletin of the Geological Society of America,133.
MLA	Román Y.A.,et al."Timing and Magnitude of Progressive Exhumation and Deformation Associated with Eocene Arc-Continent Collision in the NE Caribbean Plate".Bulletin of the Geological Society of America 133(2021).