Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31731.1 |
Miocene postorogenic extension of the Eocene synorogenic imbricated Hellenic subduction channel: New constraints from Milos (Cyclades, Greece) | |
Grasemann, Bernhard1; Huet, Benjamin1; Schneider, David A.2; Rice, A. Hugh N.1; Lemonnier, Nicolas3; Tschegg, Cornelius4 | |
2018 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN
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ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2018 |
卷号 | 130页码:238-262 |
文章类型 | Article |
语种 | 英语 |
国家 | Austria; Canada; France |
英文摘要 | The island of Milos is part of the South Aegean volcanic arc. The volcanic processes on Milos, which started ca.3.5 Ma, have been studied in detail, but the limited outcrops of basement rocks have not yet been adequately investigated. We present new structural, petrological, and geochronological data that suggest that the basement rocks on Milos (Kiriaki complex) belong to the Cycladic Blueschist Unit, which underwent blueschist metamorphism at similar to 8.5 kbar and 400 degrees C. The complex experienced pervasive ductile deformation in the Paleocene-Eocene, with top-to-the-S to -SW shearing. Recalculation of published data from eclogite pebbles that occur as detrital products in "Green Lahars" structurally above the Kiriaki complex yields contrasting metamorphic conditions of similar to 19.5 kbar at 550 degrees C, suggesting that two nappes, the exposed Lower Cycladic Nappe and eroded relicts of the Upper Cycladic Nappe, exist on Milos. These nappes, which also occur on other Cycladic islands, are separated by the newly defined synorogenic Trans Cycladic thrust. Since Milos is located above the West Cycladic detachment system, the rocks escaped the postorogenic middle-late Miocene low-angled extensional overprint. While rocks in the footwall of the West Cycladic detachment system were experiencing ductile shearing, sediments were being nonconformably deposited on metamorphic rocks of the Kiriaki complex on Milos in the late Miocene. Most importantly, the postorogenic West Cycladic detachment system did not reactivate but instead crosscut synorogenic structures such as the Trans Cycladic thrust, which bends 90 degrees at Milos, exhibiting a change from W-E- to N-S-trending stretching lineations. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000418364200013 |
WOS关键词 | HIGH-PRESSURE ROCKS ; METAMORPHIC CORE COMPLEX ; CENTRAL AEGEAN CYCLADES ; BACK-ARC EXTENSION ; ISLAND CYCLADES ; TINOS ISLAND ; SHEAR ZONE ; BLUESCHIST BELT ; SIFNOS CYCLADES ; STRAIN LOCALIZATION |
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/24786 |
专题 | 地球科学 |
作者单位 | 1.Univ Vienna, Dept Geodynam & Sedimentol, A-1090 Vienna, Austria; 2.Univ Ottawa, Dept Earth & Environm Sci, Ottawa, ON K1N 6N5, Canada; 3.Univ Paris 06, Inst Sci Terre Paris, F-75005 Paris, France; 4.Univ Vienna, Dept Lithospher Res, A-1090 Vienna, Austria |
推荐引用方式 GB/T 7714 | Grasemann, Bernhard,Huet, Benjamin,Schneider, David A.,et al. Miocene postorogenic extension of the Eocene synorogenic imbricated Hellenic subduction channel: New constraints from Milos (Cyclades, Greece)[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2018,130:238-262. |
APA | Grasemann, Bernhard,Huet, Benjamin,Schneider, David A.,Rice, A. Hugh N.,Lemonnier, Nicolas,&Tschegg, Cornelius.(2018).Miocene postorogenic extension of the Eocene synorogenic imbricated Hellenic subduction channel: New constraints from Milos (Cyclades, Greece).GEOLOGICAL SOCIETY OF AMERICA BULLETIN,130,238-262. |
MLA | Grasemann, Bernhard,et al."Miocene postorogenic extension of the Eocene synorogenic imbricated Hellenic subduction channel: New constraints from Milos (Cyclades, Greece)".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 130(2018):238-262. |
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