Devonian reef development and strata-bound ore deposits in South China
华南泥盆系生物礁发育与层控矿床
中国南部におけるデボニアンリーフの発達と地層に結合した鉱床
데본기 암초 개발 및 중국 남부의 지층에 연결된 광상
Desarrollo de arrecifes del Devónico y depósitos de mineral ligados a estratos en el sur de China
Développement des récifs du Dévonien et gisements de minerai liés aux strates dans le sud de la Chine
Развитие девонских рифов и пластовые рудные месторождения в Южном Китае
Chang-Min Yu 俞昌民 ¹, Yue Li 李越 ¹ ², Kun Liang 梁昆 ¹ ²
¹ Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing 210008, Jiangsu Province, China
中国 江苏 南京 中国科学院南京地质古生物研究所 生物演化与环境卓越创新中心
² State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology and Center for Excellence in Life and Paleoenvironment, Chinese Academy of Sciences, Nanjing 210008, Jiangsu Province, China
中国 江苏 南京 中国科学院南京地质古生物研究所 生物演化与环境卓越创新中心 现代古生物学和地层学国家重点实验室
This study focuses on the close association between Devonian reefs and the strata-bound ore deposits in South China. For the first time, the development of Devonian reefs was subdivided into three stages, respectively as the initial, succeeding and peak stages, and its evolution model is proposed.
In Dachang, Nandan county, Guangxi Zhuang Autonomous Region (Guangxi for short), a large-scale strata-bound ore deposit formed in a Devonian reef, which was affected by marine volcanic activities and Mesozoic magmatic intrusions. The reef-building reached its peak stage at the Givetian, indicating a large-scale build-up of reef and inter-reef depression.
In central-eastern Hunan Province, the strata-bound ore deposits belong to low-temperature ore-types without later magmatic intrusions or volcanic activities. In Hunan Province as well as many other localities in South China, the Givetian reefs played important roles in mobilizing ore-forming materials from the surrounding pre-Devonian rocks, providing spaces and passages for transporting hydrothermal fluid, and progressing mineralization and accumulation of ore-forming materials.
