Citation: | MA Hongyi, ZHANG Bo, ZHANG Ya, YAO Jian, ZHANG Linbing, ZHANG Mu, ZHANG Linfei, LIU Ya'nan. 2024. Geological characteristics and prospecting potential of the Madiu large–scale fluorite deposit in Luanchuan County, Henan Province[J]. Geology in China, 51(4): 1161-1174. doi: 10.12029/gc20211007001 |
This paper is the result of mineral exploration engineering.
Fluorite is an important mineral resource in modern industries, and it is listed as the top priority of nonmetallic mineral prospecting in Henan Province. In recent years, several geological prospecting units in Henan Province have been engaged in prospecting fluorite in the Heyu area of Luanchuan County, and the Madiu fluorite deposit is the first proven large deposit, with an estimated amount of 8.84 million tons of fluorite ore and 4.76 million tons of CaF2 mineral. The average grade of CaF2 is 53.83%. The east–west ends of the ore body are not closed along the strike. Therefore, summarizing the geological characteristics is of great significance for guiding the prospecting activities in this area.
Based on the general and detailed investigation of the Madiu fluorite deposit in the last five years, the metallogenic geological conditions, geological characteristics, quality characteristics, and prospecting indicators are systematically summarized.
The Madiu fluorite deposit is the largest single fluorite ore body in Henan and its surrounding provinces. There are many ore veins of different sizes, which are equal spaced along the trend and are nearly parallel along the strike. There are also many fluorite ore bodies scattered around.
The Madiu fluorite mineralization is related to granites and NW–trending structures, and the deposit type is medium–low temperature vein deposit with fissure filling in silicate rock.
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Distribution map of the Heyu granite batholith and main deposits
Distribution and topographical and geological sketch of II1 ore body in Madiu fluorite mining area (modified from Ma Hongyi and Wu Lintao, 2000
Surface outcrop (a, b) and core photographs (c) of fluorite ore
Profile of No.07 exploration line in Madiu fluorite mining area (modified from Ma Hongyi and Wu Lintao, 2000
Micro−photographs of fluorite ore
Energy spectrum of fluorite
Energy spectrum of molybdenite
Macro−photographs of fluorite ore