Lab 5A-Vein & stylolite movies

VIEPS/Mainz Microstructure Course 
| TOC | Lecture 1 2 3 4 a b  5 a b | Lab 1 a b c 2 a b c 3 a b 4 a b 5 a b | Glossary Table 1 2 3 4 5 Index |

1) Different vein types

Lecture 5.b deals with the various types of veins and their internal structures. It also contains a few movies that show the development of the vein types over time.

Look up movies in lecture 5.b


2) Stylolite movie

This is the movie of a developing stylolite that you can also find in lecture 5.b. Play the movie and answer the following questions:


(3) Computer simulation of crack-seal growth

Four movies were made with a 2-dimensional computer model that simulates the growth of a vein by the crack-seal mechanism. The movies show how several factors play a role in determining the shape and orientation of crystals in a vein:

The movies show repeated cracking and sealing on one side of a vein crystals subsequently filling (sealing) the crack from one side only. This is thus an asymmetric vein, but can also be regarded as one side of an antitaxial vein. The 'mineral' that fills the vein is somewhat like quartz. It has one fast growth direction (// to C-axis) and would, if allowed to grow in free space, grow into a shape as shown in the picture. Each crystal is shaded grey according to the orientation of its C-axis. Horizontal C-axes are dark and vertical ones are white.

 
Movies A&B
 
Movies C&D

Watch the four movies and then answer the following questions

 


Continue with part (B) of this lab.