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How to plot the strike data to the Rosette diagram (view source)
Revision as of 04:42, 1 July 2015
, 04:42, 1 July 2015no edit summary
The direction of strike indicate the direction of main force of plat tectonic in there regional. It can be determined with rosette diagram.
The direction of strike indicate the direction of main force of plat tectonic in there regional. It can be determined with rosette diagram.
[[File:Rosette.png|framed|center|Figure 6. Rosette diagram<ref>http://gigawiz.com<ref/>]]
[[File:Rosette.png|framed|center|Figure 6. Rosette diagram<ref>http://www.geology.sdsu.edu/visualgeology/geology101/Geology101Labs/structureLab9.pdf</ref>]]
The radial histogram in rosette diagram (the yellow one on Figure 6) show the direction of strike.
The radial histogram in rosette diagram (the yellow one on Figure 6) show the direction of strike.
From data above we find the dominant angel at NE quadrant is 39 – 42 degree, and at NW quadrant is 333 – 336 degree. 39 – 42 and 333 – 336 area form angel 60o, to determine the main force we have to find the center of 39 – 42 and 333 – 336 area, it will be 7o (see Figure 7). So the main force come from N7o E and N97o E. There are two main force that have opposite direction.
From data above we find the dominant angel at NE quadrant is 39 – 42 degree, and at NW quadrant is 333 – 336 degree. 39 – 42 and 333 – 336 area form angel 60o, to determine the main force we have to find the center of 39 – 42 and 333 – 336 area, it will be 7o (see Figure 7). So the main force come from N7o E and N97o E. There are two main force that have opposite direction.
[[File:20150616 135605.jpg|framed|center|Figure 7. The rosette diagram from the data ]]
Two main force compress the rock between them, so the rock become stress. The main force that come from N7o E is resultant force between Eurasian Plate and Pacific Plate. Then the main force that come from N97o E is resulted by Indo-Australia (see Figure 8). So, the result of strike measurement in Karangsambung agree with fact.
[[File:Gaya utama Indonesia.jpg|thumbnail|Figure 8. Plate tectonic around Indonesia<ref>http://geografientrepreneur.yolasite.com<ref/>]]
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