scholarly journals Growth and Shrinkage of an Active Continental Margin: Updated Geotectonic History of the Japanese Islands

2011 ◽  
Vol 120 (1) ◽  
pp. 65-99 ◽  
Author(s):  
Yukio ISOZAKI ◽  
Shigenori MARUYAMA ◽  
Takaaki NAKAMA ◽  
Shinji YAMAMOTO ◽  
Shuichi YANAI
Keyword(s):  
Continental Margin ◽  
Active Continental Margin ◽  
History Of ◽  
Japanese Islands

scholarly journals Identification of prospective geosites that show features of the active continental margin in eastern Kii Peninsula, Southwest Japan

2017 ◽  
Vol 8 (1) ◽  
pp. 19-31
Author(s):  
Dorota Suzuki ◽  
Hideo Takagi
Keyword(s):  
Continental Margin ◽  
Active Continental Margin ◽  
Southwest Japan ◽  
Rock Outcrops ◽  
Kii Peninsula ◽  
Geological Features ◽  
Relative Value ◽  
Formation History ◽  
History Of ◽  
Japanese Islands

AbstractThe eastern Kii Peninsula exhibits a variety of rock outcrops, fossils, and other geological features that illustrate the formation history of the Japanese Islands. This work aims to describe the geotourism potential of the region based on the significant rock exposures, and sets out the basis for establishing geosites in this region in the future. Geologically important sites have been selected, together with places of unique history and culture within the northern part of the eastern Kii Peninsula, including the Ise and Toba areas. The results of this study include a detailed description of the geology and history of the region, together with an evaluation of the relative value of each selected locality as a geosite. Proper development and promotion of the proposed sites would make the sites available for education and tourism, and provide opportunities for suitable development and the popularization of geological knowledge.

Evolution of an active continental margin as exemplified by the Alpine history of the Caucasus

1977 ◽  
Vol 40 (3-4) ◽  
pp. 183-199 ◽  
Author(s):  
Sh.A. Adamia ◽  
M.B. Lordkipanidze ◽  
G.S. Zakariadze
Keyword(s):  
Continental Margin ◽  
Active Continental Margin ◽  
The Caucasus ◽  
History Of

Nature and origin of the volcanic ash beds near the Permian–Triassic boundary in South China: new data and their geological implications

2019 ◽  
Vol 157 (4) ◽  
pp. 677-689 ◽  
Author(s):  
Binsong Zheng ◽  
Chuanlong Mou ◽  
Renjie Zhou ◽  
Xiuping Wang ◽  
Zhaohui Xiao ◽  
...  
Keyword(s):  
Trace Element ◽  
Continental Margin ◽  
South China ◽  
Volcanic Ash ◽  
Active Continental Margin ◽  
Main Body ◽  
Early Triassic ◽  
Late Permian ◽  
Triassic Boundary ◽  
Permian Triassic Boundary

AbstractPermian–Triassic boundary (PTB) volcanic ash beds are widely distributed in South China and were proposed to have a connection with the PTB mass extinction and the assemblage of Pangea. However, their source and tectonic affinity have been highly debated. We present zircon U–Pb ages, trace-element and Hf isotopic data on three new-found PTB volcanic ash beds in the western Hubei area, South China. Laser ablation inductively coupled plasma mass spectrometry U–Pb dating of zircons yields ages of 252.2 ± 3.6 Ma, 251.6 ± 4.9 Ma and 250.4 ± 2.4 Ma for these three volcanic ash beds. Zircons of age c. 240–270 Ma zircons have negative εHf(t) values (–18.17 to –3.91) and Mesoproterozoic–Palaeoproterozoic two-stage Hf model ages (THf2) (1.33–2.23 Ga). Integrated with other PTB ash beds in South China, zircon trace-element signatures and Hf isotopes indicate that they were likely sourced from intermediate to felsic volcanic centres along the Simao–Indochina convergent continental margin. The Qinling convergent continental margin might be another possible source but needs further investigation. Our data support the model that strong convergent margin volcanism took place around South China during late Permian – Early Triassic time, especially in the Simao–Indochina active continental margin and possibly the Qinling active continental margin. These volcanisms overlap temporally with the PTB biocrisis triggered by the Siberian Large Igneous Province. In addition, our data argue that the South China Craton and the Simao–Indochina block had not been amalgamated with the main body of Pangea by late Permian – Early Triassic time.

Late quaternary sedimentation and glacial history of the western Svalbard continental margin

1996 ◽  
Vol 133 (3-4) ◽  
pp. 123-156 ◽  
Author(s):  
Espen S. Andersen ◽  
Trond M. Dokken ◽  
Anders Elverhøi ◽  
Anders Solheim ◽  
Ingrid Fossen
Keyword(s):  
Continental Margin ◽  
Late Quaternary ◽  
Glacial History ◽  
History Of
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