SCSIO OpenIR  > 中科院边缘海地质重点实验室
Plio-Quaternary uplift of the Manta Peninsula and La Plata Island and the subduction of the Carnegie Ridge, central coast of Ecuador
Pedoja, K; Dumont, JF; Lamothe, M; Ortlieb, L; Collot, JY; Ghaleb, B; Auclair, M; Alvarez, V; Labrousse, B; dumont@geoazur.obs-vlfr.fr
2006
发表期刊JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
ISSN0895-9811
卷号22期号:40545页码:40564
摘要This paper quantifies the uplift of the Manta Peninsula and La Plata Island (Ecuador) using marine terraces. These marine terraces are part of a more extensive segment of uplifting coast extending all along the Talara arc, from 6.5 degrees S to 1 degrees N. Along this arc, the highest terraces are observed on the Manta Peninsula with five marine terraces up to 360 +/- 10 m. On La Plata Island, four marine terraces are raised up to 170 +/- 10 in. The terraces are dated using infrared- stimulated luminescence (IRSL) and U-Th methods. The calculated uplifts range from 0.3 to 0.5 mm yr(-1) for the past 300 ka. The oldest terraces show a transition to the synsedimentary uplifted Plio-Pleistocene deposits of the Canoa Formation. In comparison with the lower uplift rates documented in the Santa Elena Peninsula to the south and the Esmeraldas area to the north, the uplift of the Manta Peninsula gives an account of the effect of the subduction of the Carnegie Ridge since the late Pliocene. The coastal uplift ends to the north outside the projection point of the border of the Carnegie Ridge but extends southward along the northern margin of the Gulf of Guayaquil, outside of the effect of the Carnegie Ridge, which suggests that other elements must be considered for uplift in this area. A weak scan pattern of the Carnegie Ridge along the coast is observed, but instead of a true scan motion, the context suggests the possibility of a segmented ridge and the head-on introduction in the trench of a new segment with a beveled front trending parallel to the Grijalva fracture zone. The onset of subduction of the Carnegie Ridge seems correlated with a change in the tectonic deformation of the coast, from compression conditions before the middle-late Pliocene to extension conditions during the subduction of the ridge. (c) 2006 Elsevier Ltd. All rights reserved.
部门归属Chinese Acad Sci, Key Lab Marginal Sea Geol, S China Sea Inst, Guangzhou, Peoples R China; Chinese Acad Sci, Guangzhou Inst Geochem, Guangzhou, Peoples R China; Observat Oceanol, IRD, UMR 6526 Geosci Azur, F-06235 Villefranche Sur Mer, France; Univ Quebec, Dept Sci Terre & Atmosphere, Montreal, PQ H3C 3P8, Canada; IRD, PALEOTROPIQUE, F-93143 Bondy, France; Univ Quebec, GEOTOP, Montreal, PQ H3C 3P8, Canada
关键词Marine Terrace Luminescence Ridge Subduction Coastal Uplift Pleistocene Ecuador
学科领域Geosciences, Multidisciplinary
URL查看原文
收录类别sci
资助项目海洋地质
WOS记录号WOS:000243250100001
引用统计
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/4384
专题中科院边缘海地质重点实验室
通讯作者dumont@geoazur.obs-vlfr.fr
推荐引用方式
GB/T 7714
Pedoja, K,Dumont, JF,Lamothe, M,et al. Plio-Quaternary uplift of the Manta Peninsula and La Plata Island and the subduction of the Carnegie Ridge, central coast of Ecuador[J]. JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,2006,22(40545):40564.
APA Pedoja, K.,Dumont, JF.,Lamothe, M.,Ortlieb, L.,Collot, JY.,...&dumont@geoazur.obs-vlfr.fr.(2006).Plio-Quaternary uplift of the Manta Peninsula and La Plata Island and the subduction of the Carnegie Ridge, central coast of Ecuador.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,22(40545),40564.
MLA Pedoja, K,et al."Plio-Quaternary uplift of the Manta Peninsula and La Plata Island and the subduction of the Carnegie Ridge, central coast of Ecuador".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 22.40545(2006):40564.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
Plio-Quaternary upli(2821KB) 开放获取--请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

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。