Basic terminology of karst speleology (English Version)
This standard systematically constructs a terminology system for the first time, including 12 technical modules such as karst cave typology, genetic mechanism, and morphological classification, filling the gap in my country's standards in this field. In particular, it standardizes the international expressions of Chinese-specific terms such as tiankeng and stalagmite microstratigraphic chronology.
Classification dimensions | Traditional terms | Innovation of this standard |
---|---|---|
Genesis classification | Kalusic cave/non-karst cave | Added 6 subcategories including sulfuric acid cave and hot water cave |
Hydrological state | Water cave/dry cave | Refine the dynamic zoning of undercurrent zone cave and vadose zone cave |
Morphological characteristics | Single tunnel | Establish topological classification of sponge caves and net caves |
It is clearly defined as a giant negative landform with a depth and diameter exceeding 100 meters, and distinguishes between two types of formation mechanisms: collapse type and erosion type. Taking the Chongqing Xiaozhai Tiankeng as an example, its volume reaches 119 million m3, which meets the judgment requirement of "the bottom was once connected to an underground river" in the standard.
Five microscopic observation methods, including translucent microlayer and luminescent microlayer, were innovatively proposed to establish a "microlayer thickness-climate response" model. The stalagmites of Sanbao Cave in Hubei Province have achieved 640,000 years of continuous climate reconstruction, verifying the scientific nature of the precession cycle record clause in the standard.
When the Dashiwei Tiankeng Group applied for World Heritage, the judgment indicators of collapse-type tiankeng in this standard (volume>>1 million m3, surrounded by cliffs, etc.) were strictly adopted, and the morphological description of its stone nozzle was included as a model of standard terminology application.
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