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The AAPG/Datapages Combined Publications Database

AAPG Special Volumes

Abstract


Pub. Id: A110 (1982)

First Page: 361

Last Page: 375

Book Title: M 34: Studies in Continental Margin Geology

Article/Chapter: Banda Arc Tectonics: The Significance of the Sumba Island (Indonesia): Convergent Margins: Fields Investigations of Margin Structure and Stratigraphy

Subject Group: Geologic History and Areal Geology

Spec. Pub. Type: Memoir

Pub. Year: 1982

Author(s): F. H. Chamalaun, A. E. Grady, C. C. von der Borch, H. M. S. Hartono

Abstract:

Current geological and geophysical knowledge of the Sumba (Indonesia) Island is reviewed with consideration of recent fieldwork. Sumba does not exhibit features of the subduction tectonics of the Sunda Arc system (to the west of Sumba), nor the collision tectonics of the Banda Arc system to the east. It is supposed that Sumba is a continental fragment from Australia to the south or from Sundaland to the north, that became trapped behind the eastern Java Trench. The data does not provide convincing support for either hypothesis, but appears to favor an Australian origin. We propose critical studies that aid in resolving the origin of Sumba.

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