Orientation of structures from drill core orientation angles

Calculates the orientation of a plane or line from internal core angles ( alpha, beta, and gamma) of oriented drill cores

Usage

drillcore_orientation(azi, inc, alpha, beta, gamma = NULL)

Arguments

azi: numeric. Azimuth of drill core axis orientation in degrees (measured clockwise from North).
inc: numeric. Inclination of drill core axis in degrees (Note: negative values for downward).
alpha: numeric vector. Alpha angle in degrees
beta: numeric vector. Beta angle in degrees
gamma: numeric. (optional). Gamma angle in degrees

Value

object of calss "plane". If gamma is specified, "line" object is returned.

Examples

azi <- 225
inc <- -45
drillcore_orientation(azi, inc, 60, 320)
#>      dip_direction      dip
#> [1,]      25.00392 70.02959
#> attr(,"class")
#> [1] "plane"
drillcore_orientation(azi, inc, 45, 220)
#>      dip_direction      dip
#> [1,]      333.2489 34.77544
#> attr(,"class")
#> [1] "plane"

# multiple alpha-beta measurements
stereoplot()
stereo_point(Line(azi, -inc), lab = "CA")
drillcore_orientation(azi, inc, alpha = c(60, 45), beta = c(320, 220)) |>
  stereo_point(lab = c("A", "B"))