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Title: ヒマラヤ山脈のテクトニクスと東アジアの古環境・古気候の変動
Other Titles: Paleoenvironment and climate changes caused by the Himalayan Tectonics in the East Asia
Authors: 西, 弘嗣1 Browse this author
高嶋, 礼詩2 Browse this author
Authors(alt): Nishi, Hiroshi1
Takashima, Reishi2
Keywords: Himalaya
Asian Monsoon
Climate Changes
Issue Date: 1-Jan-2005
Publisher: 石油技術協会
Journal Title: 石油技術協会誌
Journal Title(alt): Journal of the Japanese Association for Petroleum Technology
Volume: 70
Issue: 1
Start Page: 6
End Page: 14
Abstract: The Indian subcontinent and Asian continent first contacted in the late Cretaceous (about 65Ma) and strongly collided after 52Ma because northward motion of the Indian Subcontinent slowed from 18-20cm/yr to 4.5cm/yr. Although the first record of uplift in Himalayan regions has been recorded during the Eocene. Major uplifts of the Himalayan Range and Tibetan Plateau and following sediment supply started from Oligocene through Miocene. Particularly, the rapid uplift stages of Himalayan-Tibetan regions have been recognized, at least. Around 8Ma and the last 1Ma based on sedimentological studies of marine terrestrial sequences. The micropaleontological studies in marine sequences revealed that the increased elevations in the Himalayan-Tibetan regions forced monsoonal circulation about 8Ma, which produced intense upwelling around the Arabian Sea and more seasonal climate changes of terrestrial sequences around the southern Asia. The hypothesis that uplift of plateaus and mountains caused large-scale climate changes during the Cenozoic is still unknown. However, an enhanced chemical weathering due to tectonic uplift in the Himalayan-Tibetan regions may be explained as the active driving force of the Cenozoic global cooling at the beginning of 50Ma.
Type: article (author version)
Appears in Collections:理学院・理学研究院 (Graduate School of Science / Faculty of Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 高嶋 礼詩

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