Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31800.1 |
Episodicity within a mid-Cretaceous magmatic flare-up in West Antarctica: U-Pb ages of the Lassiter Coast intrusive suite, Antarctic Peninsula, and correlations along the Gondwana margin | |
Riley, Teal R.1; Burton-Johnson, Alex1; Flowerdew, Michael J.2; Whitehouse, Martin J.3 | |
2018-07-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2018 |
卷号 | 130页码:1177-1196 |
文章类型 | Article |
语种 | 英语 |
国家 | England; Sweden |
英文摘要 | Long-lived continental margin arcs are characterized by episodes of large- volume magmatism (or flare-ups) that can persist for similar to 30 m.y. before steady-state arc conditions resume. Flare-up events are characterized by the emplacement of large-volume granodio- rite-tonalite batholiths and sometimes asso- ciated rhyodacitic ignimbrites. One of the major flare-up events of the West Gondwana margin occurred during the mid-Cretaceous and was temporally and spatially associated with widespread deformation and Pacific plate reorganization. New U-Pb geochronology from the Lassiter Coast intrusive suite in the southern Antarctic Peninsula identifies a major magmatic event in the interval 130-102 Ma that was characterized by three distinct peaks in granitoid emplacement at 130-126 Ma, 118-113 Ma, and 108-102 Ma, with clear lulls in between. Mid-Cretaceous magmatism from elsewhere in West Ant- arctica, Patagonia, and New Zealand also featured marked episodicity during the mid-Cretaceous and recorded remarkable con- tinuity along the West Gondwana margin. The three distinct magmatic events represent second-order episodicity relative to the primary episodicity that occurred on a cordillera scale and is a feature of the North and South American Pacific margin. Flare-up events require the development of a highly fusible, lower-crustal layer resulting from the continued underplating of hydrous mineralogies in the melt-fertile lower crust as a result of long-lived subduction. However, the actual trigger for melting is likely to result from external, potentially tectonic factors, e.g., rifting, plate reorganization, continental breakup, or mantle plumes. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000437009200009 |
WOS关键词 | MARIE-BYRD-LAND ; LARGE IGNEOUS PROVINCE ; WILEY GLACIER COMPLEX ; PROTO-PACIFIC MARGIN ; EASTERN PALMER LAND ; NEW-ZEALAND ; ZIRCON GEOCHRONOLOGY ; GRANITIC MAGMATISM ; SILICIC VOLCANISM ; THURSTON ISLAND |
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/24559 |
专题 | 地球科学 |
作者单位 | 1.British Antarctic Survey, Madingley Rd, Cambridge CB3 0ET, England; 2.CASP, 181A Huntingdon Rd, Cambridge CB3 0DH, England; 3.Swedish Museum Nat Hist, Box 50007, SE-10405 Stockholm, Sweden |
推荐引用方式 GB/T 7714 | Riley, Teal R.,Burton-Johnson, Alex,Flowerdew, Michael J.,et al. Episodicity within a mid-Cretaceous magmatic flare-up in West Antarctica: U-Pb ages of the Lassiter Coast intrusive suite, Antarctic Peninsula, and correlations along the Gondwana margin[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2018,130:1177-1196. |
APA | Riley, Teal R.,Burton-Johnson, Alex,Flowerdew, Michael J.,&Whitehouse, Martin J..(2018).Episodicity within a mid-Cretaceous magmatic flare-up in West Antarctica: U-Pb ages of the Lassiter Coast intrusive suite, Antarctic Peninsula, and correlations along the Gondwana margin.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,130,1177-1196. |
MLA | Riley, Teal R.,et al."Episodicity within a mid-Cretaceous magmatic flare-up in West Antarctica: U-Pb ages of the Lassiter Coast intrusive suite, Antarctic Peninsula, and correlations along the Gondwana margin".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 130(2018):1177-1196. |
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