Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31538.1 |
Emergence and evolution of Santa Maria Island (Azores)-The conundrum of uplifted islands revisited | |
Ramalho, Ricardo S.1,2; Helffrich, George3; Madeira, Jose4,5; Cosca, Michael6; Thomas, Christine7; Quartau, Rui5,8; Hipolito, Ana9; Rovere, Alessio10,11; Hearty, Paul J.12; Avila, Sergio P.13,14 | |
2017-03-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
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ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2017 |
卷号 | 129 |
文章类型 | Article |
语种 | 英语 |
国家 | England; USA; Japan; Portugal; Germany |
英文摘要 | The growth and decay of ocean-island volcanoes are intrinsically linked to vertical movements. While the causes for subsidence are better understood, uplift mechanisms remain enigmatic. Santa Maria Island in the Azores Archipelago is an ocean-island volcano resting on top of young lithosphere, barely 480 km away from the Mid-Atlantic Ridge. Like most other Azorean islands, Santa Maria should be experiencing subsidence. Yet, several features indicate an uplift trend instead. In this paper, we reconstruct the evolutionary history of Santa Maria with respect to the timing and magnitude of its vertical movements, using detailed field work and Ar-40/Ar-39 geochronology. Our investigations revealed a complex evolutionary history spanning similar to 6 m.y., with subsidence up to ca. 3.5 Ma followed by uplift extending to the present day. The fact that an island located in young lithosphere experienced a pronounced uplift trend is remarkable and raises important questions concerning possible uplift mechanisms. Localized uplift in response to the tectonic regime affecting the southeastern tip of the Azores Plateau is unlikely, since the area is under transtension. Our analysis shows that the only viable mechanism able to explain the uplift is crustal thickening by basal intrusions, suggesting that intrusive processes play a significant role even on islands standing on young lithosphere, such as in the Azores. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000396813200008 |
WOS关键词 | AZORES TRIPLE JUNCTION ; PALMA CANARY-ISLANDS ; MID-ATLANTIC RIDGE ; SEA-LEVEL CHANGE ; K-AR AGES ; INSULAR SHELVES ; LITHOSPHERIC FLEXURE ; HAWAIIAN-ISLANDS ; SAO-MIGUEL ; MORPHOLOGICAL RECORD |
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/25214 |
专题 | 地球科学 |
作者单位 | 1.Univ Bristol, Sch Earth Sci, Wills Mem Bldg,Queens Rd, Bristol BS8 1RJ, Avon, England; 2.Columbia Univ, Lamont Doherty Earth Observ, Comer Geochem Bldg,61 Route 9W-POB 1000, Palisades, NY 10964 USA; 3.Tokyo Inst Technol, Earth Life Sci Inst, Meguro Ku, 2-12-1-IE-1 Ookayama, Tokyo 152, Japan; 4.Univ Lisbon, Fac Ciencias, Dept Geol, P-1749016 Lisbon, Portugal; 5.Univ Lisbon, Fac Ciencias, Inst Dom Luiz, P-1749016 Lisbon, Portugal; 6.Denver Fed Ctr, US Geol Surv, MS 963, Colorado Springs, CO 80225 USA; 7.Univ Munster, Inst Geophys, D-48149 Munster, Germany; 8.Inst Hidrografico, Div Geol Marinha, P-1249093 Lisbon, Portugal; 9.Univ Acores, IVAR, Rua Mae Deus EdifIcio Complexo CientIfico 3 Andar, P-9500321 Azores, Portugal; 10.Univ Bremen, MARUM, D-28359 Bremen, Germany; 11.Leibniz Ctr Trop Marine Ecol, Marum Pavillion 1110, D-28359 Bremen, Germany; 12.Univ N Carolina, Dept Environm Studies, Wilmington, NC 28403 USA; 13.Univ Porto, Fac Ciencias, Rua Campo Alegre s-n, P-4169007 Oporto, Portugal; 14.Univ Acores, CIBIO, Dept Biol, InBIO Lab Associado Polo Acores, Campus Ponta Delgada,Apartado 1422, P-9501801 Azores, Portugal |
推荐引用方式 GB/T 7714 | Ramalho, Ricardo S.,Helffrich, George,Madeira, Jose,et al. Emergence and evolution of Santa Maria Island (Azores)-The conundrum of uplifted islands revisited[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2017,129. |
APA | Ramalho, Ricardo S..,Helffrich, George.,Madeira, Jose.,Cosca, Michael.,Thomas, Christine.,...&Avila, Sergio P..(2017).Emergence and evolution of Santa Maria Island (Azores)-The conundrum of uplifted islands revisited.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,129. |
MLA | Ramalho, Ricardo S.,et al."Emergence and evolution of Santa Maria Island (Azores)-The conundrum of uplifted islands revisited".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 129(2017). |
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