Jose Romo - Academia.edu (original) (raw)
Address: Mexico, Distrito Federal, Mexico
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Papers by Jose Romo
Geophysics, 1999
The magnetic transfer function in the magnetotelluric (MT) method can be represented by two simpl... more The magnetic transfer function in the magnetotelluric (MT) method can be represented by two simple complex functions that possess special properties in 3-D environments. This representation is obtained by means of a complex rotation matrix applied to the field measurements. One of the resulting functions is invariant with respect to rotations of the coordinate system and is closely related to the traditional concept known as tipper. The magnitude and phase of this new representation are invariant in a 3-D earth and unambiguously reduce to the corresponding formulas for 2-D cases. With these properties, the proposed representation overcomes the existing limitations of the current definition of the tipper. In the second complex function, the traditional concepts of rotation angle and skew appear naturally in the function's real and imaginary parts, respectively. We test the new representation using the response of a 3-D model. The results are compared with those obtained using current definitions.
Geophysical Prospecting, 2005
The subsurface geometry of the Sebastián Vizcaíno Basin is obtained from the 2D inversion of grav... more The subsurface geometry of the Sebastián Vizcaíno Basin is obtained from the 2D inversion of gravity data, constrained by a density-versus-depth relationship derived from an oil exploration deep hole. The basin accumulated a thick pile of marine sediments that evolved in the fore-arc region of the compressive margin prevalent along western North America during Mesozoic and Tertiary times. Our interpretation indicates that the sedimentary infill in the Sebastián Vizcaíno Basin reaches a maximum thickness of about 4 km at the centre of a relatively symmetric basin. At the location of the Suaro-1 hole, the depth to the basement derived from this work agrees with the drilled interface between calcareous and volcaniclastic members of the Alisitos Formation. A sensitivity analysis strongly suggests that the assumed density function leads to a nearly unique solution of the inverse problem.
Geophysics, 1999
The magnetic transfer function in the magnetotelluric (MT) method can be represented by two simpl... more The magnetic transfer function in the magnetotelluric (MT) method can be represented by two simple complex functions that possess special properties in 3-D environments. This representation is obtained by means of a complex rotation matrix applied to the field measurements. One of the resulting functions is invariant with respect to rotations of the coordinate system and is closely related to the traditional concept known as tipper. The magnitude and phase of this new representation are invariant in a 3-D earth and unambiguously reduce to the corresponding formulas for 2-D cases. With these properties, the proposed representation overcomes the existing limitations of the current definition of the tipper. In the second complex function, the traditional concepts of rotation angle and skew appear naturally in the function's real and imaginary parts, respectively. We test the new representation using the response of a 3-D model. The results are compared with those obtained using current definitions.
Geophysical Prospecting, 2005
The subsurface geometry of the Sebastián Vizcaíno Basin is obtained from the 2D inversion of grav... more The subsurface geometry of the Sebastián Vizcaíno Basin is obtained from the 2D inversion of gravity data, constrained by a density-versus-depth relationship derived from an oil exploration deep hole. The basin accumulated a thick pile of marine sediments that evolved in the fore-arc region of the compressive margin prevalent along western North America during Mesozoic and Tertiary times. Our interpretation indicates that the sedimentary infill in the Sebastián Vizcaíno Basin reaches a maximum thickness of about 4 km at the centre of a relatively symmetric basin. At the location of the Suaro-1 hole, the depth to the basement derived from this work agrees with the drilled interface between calcareous and volcaniclastic members of the Alisitos Formation. A sensitivity analysis strongly suggests that the assumed density function leads to a nearly unique solution of the inverse problem.