Early period of early Permian tubular cyanobacteria reef in the eastern part of south Qinling Mountains
- 43 Downloads
A typical reef occurs in the eastern part of south Qinling Mountains in Sanlixia, Xunyang, Shaanxi Province. The reef, extending in north-south direction, was built up by various kinds of calcareous tubes includingGirvanella, tubular cyanobacteria and problem microbials. The bioclastic bank, built up by algal clasts, foraminiferous, and fusulinids, formed the reef basement, on which dasyclads baffle bioclasts formed the original bafflestone at a small scale on the reef basement, and then a mass of bindstone was made up by all kinds of calcareous tubes and algae. On lateral part the reef is cryptalgal mudstone. The reef that occurred in the geosynclinal area is so familiar with one of the platforms in many respects, such as in reef structure, morphology and building mold. This indicates that building organisms have amazing adaptability and identity for building capacity in the two kinds of geotectonic background mentioned above.
KeywordsPermian Qinling Mountains reef tubular cyanobacteria building mode
Unable to display preview. Download preview PDF.
- 1.Parks, J. M., Reef-building biota from late Pennsylvanian reefs, Sacramento Mountains, New Mexico, Amer. Ass. Petrol. Geol., Bull., 1962, 46(2): 274.Google Scholar
- 2.Wilson, J. L., Carbonate Facies in Geologic History, Berlin: Springer-Verlag, 1975.Google Scholar
- 3.Bureau of Geology and Mineral Resources of Shaanxi Province, Regional Geology of Shaanxi Province (in Chinese), Beijing: Geological Publishing House, 1992.Google Scholar
- 4.Ding Yunjie, Xia Guoying, Xu Shouyong et al., The Carboniferous-Permian Boundary in China (in Chinese), Beijing: Geological Publishing House, 1992.Google Scholar
- 5.Riding, R., Soja, C. M., Silurian calcareous algae cyanobacteria and microproblematica from the Alexander Terrane, Alaska. J. Paleont., 1993, 67(5): 710.Google Scholar
- 6.Fan Jiasong, Qi Jingwen, Zhou Tieming et al., Permian Reefs of Longlin, Guangxi (in Chinese), Beijing: Geological Publishing House, 1990.Google Scholar
- 8.Liu Baojun, Xu Xiaosong, Xu Qiang, Devonian sedimentary environments and basin evolution in Zhashui-Zhenan district, Eastern Qinling, China, Acta Sedimentologica Sinica, 1990, 8(4): 3.Google Scholar
- 9.Lin Jinyan, Characteristics of the Late Devonian organic reef in Sanlixia, Zhenan, Shaanxi Province and its control over the occurrence of Pb-Zn deposits, Acta Sedimentologica Sinica, 1994, 12(1): 16.Google Scholar