Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1306/12081717221 |
Western Caribbean intraplate deformation: Defining a continuous and active microplate boundary along the San Andres rift and Hess Escarpment fault zone, Colombian Caribbean Sea | |
Carvajal-Arenas, Luis Carlos; Mann, Paul | |
2018-08-01 | |
发表期刊 | AAPG BULLETIN |
ISSN | 0149-1423 |
EISSN | 1558-9153 |
出版年 | 2018 |
卷号 | 102期号:8页码:1523-1563 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The San Andres rift (SAR), located on the lower Nicaraguan Rise, is a previously poorly studied, active, 015 degrees-trending, bathymetric, and structural rift basin that is 11-27 km (7-17 mi) wide and extends for 346 km (215 mi) across the western flank of the Caribbean plate. In this study, we integrate bathymetric maps, potential field data, and high-resolution, two-dimensional (2-D) seismic lines to understand the crustal structure, tectonic history, and tectonic origin of the SAR, which is one of the active areas within the otherwise stable Caribbean plate. We compiled regional gravity and magnetic data that revealed a negative gravity anomaly and positive magnetic anomaly that we interpret as a result of crustal thinning and an elevated Moho along the main rift axis of the SAR. Forward models of gravity data show four possible interpretations for the origin of the crust underlying and surrounding the SAR. Interpretations of 2-D seismic reflection data show structural features within the upper crust and sedimentary sections typical of other active rift systems including a SAR-parallel, north-south alignment of earthquakes with the larger events showing normal and strike-slip focal mechanisms. Sequential kinematic restorations based on 2-D seismic profiles reveal three major phases of SAR opening: (1) the initial early Eocene rifting stage; (2) middle Eocene extension; and (3) a rapid middle Miocene to early Pliocene extension accompanied by emergence of the San Andres Island as a rift shoulder. We propose slab rollback and intraplate extension as main tectonic mechanisms to explain all rift phases and Neogene volcanism found in the western Caribbean region. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000445705000005 |
WOS关键词 | CAYMAN TROUGH ; TECTONIC EVOLUTION ; PLATE BOUNDARY ; MAGNETIC-ANOMALIES ; OLIGOCENE-MIOCENE ; BASIN ; AMERICA ; COLLISION ; HISTORY ; MOTION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24461 |
专题 | 地球科学 |
作者单位 | Univ Houston, Dept Earth & Atmospher Sci, 4800 Calhoun Rd, Houston, TX 77004 USA |
推荐引用方式 GB/T 7714 | Carvajal-Arenas, Luis Carlos,Mann, Paul. Western Caribbean intraplate deformation: Defining a continuous and active microplate boundary along the San Andres rift and Hess Escarpment fault zone, Colombian Caribbean Sea[J]. AAPG BULLETIN,2018,102(8):1523-1563. |
APA | Carvajal-Arenas, Luis Carlos,&Mann, Paul.(2018).Western Caribbean intraplate deformation: Defining a continuous and active microplate boundary along the San Andres rift and Hess Escarpment fault zone, Colombian Caribbean Sea.AAPG BULLETIN,102(8),1523-1563. |
MLA | Carvajal-Arenas, Luis Carlos,et al."Western Caribbean intraplate deformation: Defining a continuous and active microplate boundary along the San Andres rift and Hess Escarpment fault zone, Colombian Caribbean Sea".AAPG BULLETIN 102.8(2018):1523-1563. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论