GRAVITY AND MAGNETIC CHARACTERISTICS OF THE POWELL BASIN AND THEIR TECTONIC IMPLICATIONS

HU Yi; WANG Liming; FANG Xudong; HE Huiyou; ZHONG Guicai; XU Jiang

doi:10.3724/SP.J.1140.2015.03167

2015 Vol. 35, No. 3

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Article navigation > Marine Geology & Quaternary Geology > 2015 > 35(3): 167-174

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HU Yi, WANG Liming, FANG Xudong, HE Huiyou, ZHONG Guicai, XU Jiang. GRAVITY AND MAGNETIC CHARACTERISTICS OF THE POWELL BASIN AND THEIR TECTONIC IMPLICATIONS[J]. Marine Geology & Quaternary Geology, 2015, 35(3): 167-174. doi: 10.3724/SP.J.1140.2015.03167

Citation:

HU Yi, WANG Liming, FANG Xudong, HE Huiyou, ZHONG Guicai, XU Jiang. GRAVITY AND MAGNETIC CHARACTERISTICS OF THE POWELL BASIN AND THEIR TECTONIC IMPLICATIONS[J]. Marine Geology & Quaternary Geology, 2015, 35(3): 167-174. doi: 10.3724/SP.J.1140.2015.03167

GRAVITY AND MAGNETIC CHARACTERISTICS OF THE POWELL BASIN AND THEIR TECTONIC IMPLICATIONS

1. Third Institute of Oceanography, State Oceanic Administration, Coast and Ocean Environmental Geology Open Laboratory, Xiamen 361005, China;
2. Maiqin Nengyuan Jishu Fuwu Co Ltd, Beijing 100004, China

Received Date: 14 April 2015

Revised Date: 20 April 2015

Abstract

Abstract

The Powell Basin is a typical high latitude marginal sea in the southern hemisphere, located between the northeast of Antarctic Peninsula and the South Orkney Microcontinent. Gravity and magnetic data, historical documents and the research products of tectonic evolution of the basin have been comprehensively collected in order to describe the characteristics of magnetic and gravity fields and the opening history of the basin. A buried spreading ridge is found in the middle of the Powell Basin, trending approximately in NW 30°. Residual basements can be found on both sides of the ridge. A rift basin occurs on the shelf margin. The symmetric linear magnetic anomalies and age dating data made us possible to reconstruct the history of the Powell Basin which consists of the closure stage (40 Ma), post-rifting stage (29.7 Ma) and mid ridge spreading stage (27 Ma).
- gravity and magnetic /
- opening history of the Powell Basin /
- spreading ridge /
- rift basin /
- Powell Basin

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References

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