Comments on: A stereonet solution for alpha beta angles in oriented drill core

By: Stereonet validation of structural measurement in oriented drill core « Roger Marjoribanks Roger Marjoribanks

Fri, 08 Dec 2023 08:30:32 +0000

[…] Alpha and beta measurements numbers are then subsequently crunched by computer, along with surveyed hole orientation data, to produce a standard strike and dip (or dip and dip direction) measurement, which can then be displayed as a stereonet plot, a histogram or as short lines of intersection on a drill section. It is also relatively easy to do this manually by using a stereonet (for details, see my blog post HERE) […]

By: Using Stereonets « Roger Marjoribanks Roger Marjoribanks

Using Stereonets « Roger Marjoribanks Roger Marjoribanks — Fri, 09 Jul 2021 06:14:07 +0000

[…] As a means of solving simple problems in 3-dimentional trigonometry. Exploration and mining geologists are constantly facing problems like these and their solution is critical to understanding the structure of the earth – the 3-D arrays of beds and faults and fold axes and ore bodies that are the matter of their profession. At what depth will this bed that I observe here intersect that fault there? What will be the apparent dip of an NE-dipping ore shoot on An E-W drill section? Will this plunging linear ore shoot pass below the drill hole that I plan? How do I convert the alpha and beta angles measured in core into strike and dip? (For the answer to that last question see here). […]

By: Five rules for use of alpha-beta measurements in drill core « Roger Marjoribanks Roger Marjoribanks

Sat, 03 Jul 2021 06:10:48 +0000

[…] (2) For how to use a stereonet to reduce alpha/beta angles to dip and dip direction, see my blog post here). […]