2024-03-28T15:11:55Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00010769
2023-01-16T03:56:42Z
336:635:636
美濃地域の中生代地史 : 地質学的および古地磁気学的考察
The Mesozoic Evolution of the Mino Terrane, Central Japan : A Geologic and Paleomagnetic Synthesis
服部, 勇
32351
Hattori, Isamu
32352
名古屋大学
Nagoya University
理学博士
The Mino tectono-stratigraphic terrane, central Japan, underlain bv Permian to Jurassic sedimentary and volcanic rocks of various origins, was formed through accretion processes associated with the Mesozoic sea-floor spreading. This conclusion has been reached mainly- from the following reasoning; 1. the entire boundary of this terrane is defined by tectonic belts with high-pressure metamorphic rocks and serpentinzed ultramafic rocks, 2. the chemistry and petrology of the Permian greenstones demonstrate their affinity with abyssal tholeiitic and alkalic basalts, 3・the widespread, but chaotic, occurrence of Permian greenstones, Triassic cherts, and Jurassic siliceous shales in the younger Jurassic clastic rocks of this terrane suggests extensive post -depositional mixing of strata, 4. the sedimentology of the Jurassic sandstones strongly suggests that they are turbidity-current deposits supplied from cratonic lands, 5. the South-Pacific type fossil assemblage in the Mino terrane shows strong contrast with the North-Pacific type fossil assemblage of the adjacent terranes, 6. the paleomagnetism of the Permian and Jurassic greenstones, the Triassic cherts, and the Jurassic siliceous shales implies long-distance northward drift in the Cretaceous- time of these rocks from their original low latitudinal regions. Along with this northward migration, the Mino terrane was accreted with extensive internal deformation to northeast Asia including the present Hida terrane. Recent accumulation of paleomagnetic and paleontologic data in the Pacific peripheral regions appears to support the existence of many allochthonoum,s terranes which migrated from the equatorial regions. The Mino terrane may be regarded as one example of these Circum-pacific allochthons.
名古屋大学博士学位論文 学位の種類 : 理学博士(論文) 学位授与年月日 : 昭和57年3月23日
doctoral thesis
1982-03-23
application/pdf
application/pdf
乙第2140号
http://hdl.handle.net/2237/12612
https://nagoya.repo.nii.ac.jp/record/10769/files/ot2140_abstr.pdf
https://nagoya.repo.nii.ac.jp/record/10769/files/ot2140.pdf
eng