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| STUDY ON THE GEOLOGY AND ORE-CONTROLLING CONDITIONS OF THE BAUXITE DEPOSITS IN SANMENXIA AREA, HENAN PROVINCE |
| XI Shan-feng1, OUYANG Zhao-zhuo2, LI Jian-quan1, WANG Zhong-yu1, FENG Fei-fan1, LI Xun1 |
1. No. 4 Geological Exploration Institute, Henan Bureau of Geology and Mineral Exploration, Zhengzhou 450001, China;
2. Shenyang Center of Geological Survey, CGS, Shenyang 110034, China |
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Abstract The bauxite deposits in Sanmenxia area, Henan Province, are of diasporic sedimentary type formed on Ordovician limestone. The forms of bauxite orebodies are closely related to the paleokarst erosion surface, occurring as stratiform-stratoid, lentiform (podiform) and doline form, which are strictly controlled by paleotopography. The ore types are mainly rudaceous, gravelly, alveolar, pisolitic and compact bauxites, and the composite types as well. The forming of deposits is controlled by multiple conditions mainly as strata of Benxi Formation, structure and paleogeography.
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Received: 10 August 2018
Published: 05 November 2019
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2019, Vol. 28 
