Deformation of a continent

2014 Fiscal Year Final Research Report

• Project/Area Number: 22403012
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 海外学術
• Research Field: Geology
• Research Institution: Kobe University
• Principal Investigator: OTOFUJI Yo-ichiro 神戸大学, 理学(系)研究科(研究院), 教授 (90160895)
• Co-Investigator(Kenkyū-buntansha): UNO Koji 岡山大学, 大学院教育学研究科, 准教授 (10510745) ; MORINAGA Hayao 兵庫県立大学, 教授 (40210182) ; YAMAZAKI Kazuhito 神戸大学, 大学院理学研究科, 講師 (20335417)
• Project Period (FY): 2010-04-01 – 2015-03-31
• Keywords: 大陸 / 変形 / 古地磁気学 / アジア大陸 / インド亜大陸 / アフリカ大陸

Outline of Final Research Achievements

Deformation aspect of a continent is studied by paleomagnetic view points. We focus on the Asian continent due to collision of the Indian continent. SE Asia is chosen for deformation study of the Asian continent. Because India collied with Asia at about 50 Ma, we collcted Cretaceous red sandstones from Yunnan, Sichuan, Indochina Peninsula and Malay Peninsula. Reliable paleomagnetic directions are observed after careful thermla demagnetization. These data describe deformation of SE Asia as follows. (1)SE Asia experienced clockwise rotation more than 20 degrees. A zone affected by clockwise rotational deformation extends from the southern tip of the Chuan Dian Fragment, through Indochina Peninsula to as far as the Malay Peninsula. (2) The the Shan-Thai block and the southern margin of the Indochina Peninsula were subjected to internal tectonic deformation. (3)The Khorat basin behaved as a rigid block during contnenental deformation.

Free Research Field

地球惑星科学