Study on structural characteristics and evolution process of the Tasman Sea

Li Kai; Song Lijun; Dong Yu; Li Airong

doi:10.3969/j.issn.0253-4193.2019.03.010

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Li Kai, Song Lijun, Dong Yu, Li Airong. Study on structural characteristics and evolution process of the Tasman Sea[J]. Haiyang Xuebao, 2019, 41(3): 96-105. doi: 10.3969/j.issn.0253-4193.2019.03.010

Citation:

Li Kai, Song Lijun, Dong Yu, Li Airong. Study on structural characteristics and evolution process of the Tasman Sea[J]. Haiyang Xuebao, 2019, 41(3): 96-105. doi: 10.3969/j.issn.0253-4193.2019.03.010

Li Kai, Song Lijun, Dong Yu, Li Airong. Study on structural characteristics and evolution process of the Tasman Sea[J]. Haiyang Xuebao, 2019, 41(3): 96-105. doi: 10.3969/j.issn.0253-4193.2019.03.010

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Study on structural characteristics and evolution process of the Tasman Sea

doi: 10.3969/j.issn.0253-4193.2019.03.010

School of Earth Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China

Received Date: 2018-01-12
Rev Recd Date: 2018-03-28

Abstract

Abstract

Tasman Sea lies in the Southwest Pacific, among the Pacific Plate, Indo-Australia Plate, and Antarctica Plate, where geotectonic background is intricate. It is one of the most important waters for global oil and gas resource exploration, but research on the region is rare in domestic. We identify tectonic elements around the Tasman Sea Basin based on the free air gravity anomaly published on the International Gravimetric Bureau. Predecessors' research about the Tasman Sea usually focused on the part north of the Resolution Ridge, but we suggest that the Tasman Sea is supposed to include region south of the Resolution Ridge, west of the Macquarie Ridge and east of the Tasman Fault Zone. This region is transformed by intrusion and spreading of the Southeast Indian Ocean Ridge along boundary between the Southwest Pacific Plate and Indo-Australia Plate (the Macquarie Ridge) since about 50 Ma BP. Results show that three class-ltectonic elements in this region and adjacent area are as follows: Eastern Continental Margin of Australia, Zealandia and Tasman Sea Basin (including Western Sub-Basin, Eastern Sub-Basin, and Southern Sub-Basin). In addition, we make 11 evolution process maps of the Tasman Sea by using global crustal age data supplied by the Professor Dietmar Müller of Sydney University. The process shows that evolution of Tasman sea can be divided into four phases: Mesozoic intra-continental rift phase (90-83 Ma BP); expansion phase of the Tasman Sea (83-61 Ma BP); stop expansion phase of north of the Tasman Sea (61-52 Ma BP), transformation of southern sub-basin (52 Ma BP to present).
- Tasman Sea,
- division of tectonic elements,
- oceanic crust age,
- plates reconstruction

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References(37)

References

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