Abstract
The bauxite layer in Western Henan supplies a large number of bauxite ores and is useful for studying tectonic movement. In this paper, the bauxite samples were selected to carry out LA-ICP-MS detrital zircons U-Pb dating and Hf isotope testing. The results indicated that the detrital zircons with the Early Paleozoic ages were mainly derived from the North Qinling Orogenic Belt. The detrital zircons of the Precambrian age may be derived mainly from the basement of the North China Block and the North Qinling Orogenic Belt. The results of this study support the opinion that the North Qinling Orogenic Belt has been uplifted at ~310 Ma, and the surface of the southern craton has an overall north-dipping topography at this time.
Highlights
The Yanshi County of Henan Province is located in the southern part of the North China Craton (NCC) and the eastern part of the Mesozoic Cenozoic Luoyang Basin
According to the detrital zircon of the original rock, the palaeozoic tectonics and orogeny, the bauxite in the NCC have two provenances: the Bayan Obo-Chifeng fault and adjacent to the Xingmeng Orogenic Belt; the Luanchuan Fault Zone is adjacent to the Qinling Orogenic Belt
The north of the Shangdan Fault Zone belongs to the North Qinling Orogenic Belt (NQOB), with different stages and degrees of metamorphism of sedimentary strata
Summary
The Yanshi County of Henan Province is located in the southern part of the North China Craton (NCC) and the eastern part of the Mesozoic Cenozoic Luoyang Basin. It is the earliest area found in the bauxite deposit and is a part of the metallogenic belt in Western Henan [1]. The occurrence horizon of bauxite is the upper Carboniferous Benxi Formation. The LA-ICP-MS detrital zircon U-Pb dating of bauxite in Yanshi County, Henan Province, South China Craton was carried out. It is expected to help the genesis of the Benxi Formation bauxite and the mining of geological information carried by bauxite
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