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Florinsky, I.V., 1992. Recognition of Lineaments and Ring Structures: Quantitative Topographic Techniques. Pushchino Research Centre Press, Pushchino, 47 p. (in Russian, with English abstract).

 

Data on linear land surface structures (lineaments and ring structures) are used to solve some geological problems. Revealing of lineaments and ring structures is an important step of their studies. Under revealing, we mean processing of remotely sensed data, topographic, geological and other materials to recognise these structures within terrains under study. Among quantitative techniques for revealing of lineaments and ring structures, the most popular methods are based on algorithms of pattern recognition. These methods are used to process remotely sensed data. However, the validity of a record of the main – topographic – indicators of linear structures is not necessarily successful. At the same time, revealing methods based on topographic data processing were not properly elaborated. This is because there were not quantitative definitions for concepts of topographic indicators of lineaments and ring structures – fragments of valley and crest networks marked by an anisotropy of planimetric distribution. This makes formalisation of revealing techniques difficult. Application of available methods to reveal linear land surface structures can lead to information losses and artefacts.

 

We proved that concepts of topographic indicators of lineaments and ring structures – fragments of valley and crest networks – are quantitatively described by two local topographic attributes: horizontal and vertical land surface curvatures. We developed a quantitative topographic method for revealing of lineaments and ring structures. The method includes the following steps:

 

·     Compilation of a square-spaced digital elevation model with a grid size corresponding to a typical size of linear structures under study,

·     Calculation of horizontal and vertical land surface curvatures,

·     Mapping of these topographic attributes; their values should be stratify into two levels relatively zero values.

 

The method developed was tested on the example of the part of the Crimean Peninsula and adjacent sea bottom. We revealed systems of near-north, near-east, near-northeast, and near-northwest-striking lineaments as well as several ring structures. The system of near-north-striking lineaments is marked by a strong anisotropy. It can be connected with a system of north-striking trans-regional Preriphean deep-seated faults observed in the southern part of the East European platform. Near-east, near-northeast, and near-northwest-striking lineaments can be connected with structures of the Mountain Crimean meganticlinorium of the Mediterranean Alpine geosynclinal belt and zones of the Piedmont Crimean-Caucasian fault and the Yalta fault. We found that fault intersections often coincide with topographically expressed zones of flow accumulation described by negative values of both horizontal and vertical land surface curvatures. The comparative analysis of the results obtained and published data shown that the method developed actually works.

 

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See also: Florinsky, I.V., 1996. Quantitative topographic method of fault morphology recognition. Geomorphology, 16: 103–119.  DOI  PDF  Colour figures