Variations in crustal thickness of the Kane transform in the north Atlantic ocean

Philip D. Rabinowitz; Hu Yan-chang

doi:10.1007/BF02850740

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Variations in crustal thickness of the Kane transform in the north Atlantic ocean

OriginalPaper | Updated：2023-05-16

- Variations in crustal thickness of the Kane transform in the north Atlantic ocean
- Variations in crustal thickness of the Kane transform in the north Atlantic ocean
- 海洋湖沼学报（英文） 2001年19卷第4期页码：350-360
- Affiliations：
  
  Department of Geology and Geophysics
- Author bio：
- Funds：
- DOI：10.1007/BF02850740
  中图分类号：
- 纸质出版：2001
- Accepted：
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Variations in crustal thickness of the Kane transform in the north Atlantic ocean[J]. 海洋湖沼学报（英文）, 2001,19(4):350-360.

Rabinowitz, P.D., Yan-chang, H. Variations in crustal thickness of the Kane transform in the north Atlantic ocean., Chin. J. Ocean. Limnol. 19, 350–360 (2001). https://doi.org/10.1007/BF02850740
Variations in crustal thickness of the Kane transform in the north Atlantic ocean[J]. 海洋湖沼学报（英文）, 2001,19(4):350-360. DOI： 10.1007/BF02850740.

Rabinowitz, P.D., Yan-chang, H. Variations in crustal thickness of the Kane transform in the north Atlantic ocean., Chin. J. Ocean. Limnol. 19, 350–360 (2001). https://doi.org/10.1007/BF02850740 DOI：

摘要

Abstract

A new approach was taken to investigate the crustal stucture of the Kane transform and its aseismic extension

using high quality bathymetry and gravity data. The gravity signatures associated with variations in crustal thickness of the transform were isolated from the observed free-air anomaly

was continued downward to the mean depth of the crust/mantle interface and converted onto the relief on that surface. The crustal thickness of the transform was then calculated by subtracting seawater depth from the depth of the gravity-inferred crust/mantle interface

3-D gravity investigation results indicate that the Kane transform and adjacent areas are associated with a crust thinner than normal oceanic crust. The transform trough is largely underlain by a crust less than 4.5km thick and in the nodal basins the crust may be as thin as 3 km. The crust beneath the fracture zone valley is 4–5.5 km thick. The rift valleys on the spreading segments are also characterized by thin crust (4–5 km thick). Thin oceanic crust extends to 20–30 km from the transform axis except for some localized places such as the inside corner highs adjoining the ridge-transform intersections. These gravity-inferred results match fairly well with limited published seismic results. Thinning of the crust is mainly attributable to a thin layer 3

which in turn may be explained by the combined effects of reduced magma supply at the ends of the spreading segments and tectonic activities in the region.

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references

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