『Abstract
The Petroglyphs of Cheonjeon-ri in the area of Ulsan metropolitan
City in the southeastern part of the Republic of Korea represent
outstanding cultural property of the country. The rock carvings
- discovered about 40 years ago - provide valuable information
on the life of the ancient people of different periods. In 1973,
the petroglyphs were designated Korean National Treasure. Apparently,
the petroglyphs have suffered damage from weathering such as loss
of stone material, current detachment of stone material and deposits
on the stone surface. The protection of this masterpiece of historic
rock carving has become an important concern in the country. Geoscientific
studies were carried out, targeted to stone analysis and to characterization
and rating of weathering damage. The diagnostic studies combined
laboratory analysis of representative unweathered and weathered
stone material and in situ investigation by means of profile measurements
at the carvings, mapping of weathering forms, ultrasonic measurements
and rebound hardness measurements. Methodology and results of
the material and damage diagnosis are presented. The results on
type and extent of damage in combination with deduced risk prognosis
reveal a considerable threat to the historical site of Cheonjeon-ri
due to weathering and they indicate the need of intervention for
monument preservation.
Keywords: Petroglyphs; Petrographical studies; Weathering damage;
Damage diagnosis; Risk prognosis; Republic of Korea』
Introduction
Methodological approach
In situ investigation
Sampling, laboratory testing
Results
Petrography and petrophysical properties
Weathering forms
Results of the in situ measurements
Damage categories, damage index
Discussion
Conclusions
Acknowledgments
References