Hi all,
I need your opinion or maybe some article to answer this question:
1. What linement identification (from remote sensing data) is required on geological investigation ? What for ?
2. What is the relationship between linement and fault ? Is all linement have relationship with fault ?
In this case, linement is natural morphological patern
Well lineament is a very broad term. You mean lineament from satellite view? They are usually related with major faults or similar structures, of course. They usually look as lines in the orthophoto. But please, could you be more precise so I can try to solve the doubt?
A good relation between lineament and fault exist. The consonance must be take in to account from a statistical point of view if you are working form satellite images, where you cannot have a relation between morphological forms linked to the tectonics, as weel as for example, triangular facets or alignements of scarps, ecc. If you have the possibility to carried out a field investigation, you can analize the total fracture field with a mesostructural analisys and find a relation between the two sistems. If you are working using aerial photos, you can introduce the morphological concept to select lineaments, reducing in this manner the error. It is clear that you can have different solutions which are connected to the type of work that you are carrying out, if you are working on a large scale the statististical approach can be sufficient, but if you are working in a detailed schale it is necessary the support of aerial photos and the ceck in the field, on every single lineament.
You can find some indication on the following my pubblications, that you can find in my profile:
- "Recent tectonics along the Bahr El Jebel (Withe Nile) Valley, between Nimule and Juba (Southern Sudan)". Boll.Soc.Geol.It., 107.
Ciotoli G, Lombardi S., Morandi S. & Zarlenga F. (2002) – A statistical technique to study the relationships between Helium leakage and regional tetctonic setting. The Vasto Basin (Abruzzo-Molise, Central Italy). AAPG Bulletin, 88/3, 355-372.
Ciotoli G., Lombardi S., Serafini S. & Zarlenga F. (1997) - The refinement of geomorphological and geochemical statistical techniques in the study of clay-basin tectonics: Val d’Era Basin (Central Italy). Il Quaternario, 10 (2), 231-246.
Hi, Udhi
Lineament is just a line element of the landscape. On satellite images lineament may indicate roads, exits a hard rock, chains of linear landscape elements, linear arrangement of vegetation, and much more, including faults and fracturing zone (zero-amplitude faults). In any case, it goes into a fault lineament discharge only after careful consideration (including the field) geological structure and reliable evidence. Thus lineament is not always the fault, even though the fault may be isolated as the lineament in the initial stage of geological exploration of the territory.
Bast regards
Vladimir
Hi all, thanks for your idea.
I asked that question because, i want to get the relationship between the density of linement with the fault zone, then, Can i n identify the fault direction from the linement density direction ?
You could, of course. But it could also represent dike systems. You can also distinguish faults from river patterns. Please, always consider getting other sources of information (geological maps, geophysical data...)
I fully agree with Daniel.
Especially since the lineaments are subjective feature
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