Determine density contribution of basement rock by modeling of 3D gravity inversion

Authors

  • Đỗ Đức Thanh Trường Đại học Khoa học Tự nhiên, Đại học Quốc gia Hà Nội
  • Nguyễn Kim Dũng Viện Địa chất và Địa Vật lý Biển, Viện Hàn lâm Khoa học và Công nghệ Việt Nam

DOI:

https://doi.org/10.15625/0866-7187/35/1/3037

Abstract

In this paper, method based on the combine of anomaly "peeled layer" calculating with three - dimensional gravity inversion is researched in oder to determine the density contribution of basement rock.
By this method, depth to bottom of sedimentary layers is defined by another geophysical methods. Gravity field component of upon sedimentary layers with suggestion that the variation of sedimentary basin's density contrast is approximated to a exponential function are calculated at each observed point. Residual field component separated from the total observed anomaly after removing this field components as well as regional field component is considered as the field component, that reflects inhomogenous of density of basement rock. It is used to determine density contribution of basement rock based on the nonlinear optimization technique of the Marquardt algorithm.
Algorithm is programed in Matlab code to atempt on three dimensional mathematical models.The results received by experimentally calculating in respect of precision, convergence as well as feasibility computer time show the ability of application of the method.

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Published

2013-06-17

How to Cite

Thanh, Đỗ Đức, & Dũng, N. K. (2013). Determine density contribution of basement rock by modeling of 3D gravity inversion. Vietnam Journal of Earth Sciences, 35(1), 47–52. https://doi.org/10.15625/0866-7187/35/1/3037

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Articles