Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31363.1 |
Thermochronology constraints on Miocene exhumation in the Central Range Mountains, Trinidad | |
Giorgis, Scott1; Weber, John2; Sanguinito, Sean1; Beno, Carl1; Metcalf, James3 | |
2017 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2017 |
卷号 | 129 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The Central Range fault zone is a continental transform that accommodates most of the present-day slip between the Caribbean and South American plates in Trinidad. Global positioning system data and paleoseismic work suggest that this zone is active today and has been active for at least the past several thousand years. The modern fault zone overprints a middle Miocene fold-andthrust belt; therefore, the strain recorded in the Central Range fault zone is the sum of both middle Miocene and more recent events. Thermochronology data from Eocene and Oligocene sandstones in the Central Range were collected to evaluate the timing of exhumation driven by crustal shortening and thickening. (U-Th)/He zircon analysis of subhedral zircons collected from eight samples indicated that the burial temperatures of these sedimentary rocks did not exceed similar to 180 degrees C, suggesting that these grains record detrital (U-Th)/He dates. Apatite fission-track (AFT) analysis of 10 samples yielded mixed results, with cooling ages ranging from 30 to 15 Ma; however, most sites failed the.2 test, suggesting that multiple age cohorts are present. Pooled AFT ages suggest that rocks presently at the surface were exhumed through their AFT closure temperature ca. 11-18 Ma. Cooling and exhumation thus most likely resulted from middle Miocene shortening across the fold-and-thrust belt in response to early oblique convergence between the Caribbean and South America plates. Post-Miocene deformation associated with more recent transform tectonics has therefore resulted in more limited ( |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000390988400010 |
WOS关键词 | EASTERN OFFSHORE TRINIDAD ; CLASTIC SEDIMENTARY-ROCKS ; CARIBBEAN PLATE BOUNDARY ; TRACK ANNEALING KINETICS ; FISSION-TRACK ; SOUTH-AMERICA ; FAULT ZONE ; APATITE ; VARIABILITY ; 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/25096 |
专题 | 地球科学 |
作者单位 | 1.SUNY Coll Geneseo, Dept Geol Sci, 1 Coll Circle, Geneseo, NY 14454 USA; 2.Grand Valley State Univ, Dept Geol, Padnos Hall Sci 118,One Campus Dr, Allendale, MI 49401 USA; 3.Univ Colorado Boulder, Dept Geol Sci, 2200 Colorado Ave,UCB 399, Boulder, CO 80309 USA |
推荐引用方式 GB/T 7714 | Giorgis, Scott,Weber, John,Sanguinito, Sean,et al. Thermochronology constraints on Miocene exhumation in the Central Range Mountains, Trinidad[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2017,129. |
APA | Giorgis, Scott,Weber, John,Sanguinito, Sean,Beno, Carl,&Metcalf, James.(2017).Thermochronology constraints on Miocene exhumation in the Central Range Mountains, Trinidad.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,129. |
MLA | Giorgis, Scott,et al."Thermochronology constraints on Miocene exhumation in the Central Range Mountains, Trinidad".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 129(2017). |
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