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Ore Study on the Proterozoic Boron Deposits in the East Liaoning Province

Author: ZhouHongChun
Tutor: XiaoRongGe
School: Chinese Geology University (Beijing)
Course: Mineralogy,petrology, Mineral Deposit Geology
Keywords: Liaodong Borate deposit Ore Causes Mode Prospecting
CLC: P619.2
Type: Master's thesis
Year: 2006
Downloads: 98
Quote: 1
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Abstract


The Liaodong area borate deposit is a typical endogenous borate deposit, with its own development and characteristics. According to the regional geology and geological features, summary and analysis of the distribution of boron and boron control factors. By a variety of modern testing methods, focus on the texture and structure of the ore, mineral composition and chemical composition characteristics, reliable information and logo for the genesis and prospecting. Summed up a systematic study of the metamorphic zone deposits through research, three the typical boron bed the study, the progress made: 1. System to study the basis of geological data of the mine: mine stratigraphy, lithology tectonic setting, magmatism, sedimentation, metamorphism, geomorphology and other basic geological data for a detailed analysis of the digestion that deposit by magnesium-rich carbonate rock the Early Proterozoic Kuandian group in control, boron-containing rock, sedimentary environment belongs limitations crack Valley environment, the the Kuandian group in the metamorphic rocks is a marine volcanic sedimentary rocks and marine carbonate rocks. -Rays of rock samples, thin section analysis to determine the texture and structure of the ore, minerals generated sequence and symbiotic combination of relationship, and natural ore type, type of industry and industrial grade divided. Targeted rock samples collected system petrochemistry, trace elements, rare earth elements, isotopes test analysis and test results obtained boron stone and dolomite, magnesium peridotite more intimate The genesis Contact boron from the deep crust is a light source. Both trace element composition and content of the ore of boron are consistent with the host rock, related prove borate deposit in boron-rich volcanic - hydrothermal activity. 4 Research boron mineralization, Liaodong area boron mineralization model that boron mineralization mainly gone through two stages, namely sedimentary metamorphic and hydrothermal alteration in two stages. Pointed out that the ancient basement granite geological structure of space control boron rich boron, magnesium, potassium, sodium depleted calcium hot brine geochemical conditions of ore-controlling metamorphism of the physical and chemical conditions of preservation conditions of boron Boron body weight in place controls to the form of construction and hook-shaped folds, control boron formation conditions of the time is 1900 ~ 2000Ma regional metamorphism. 5 combined with field investigation and laboratory analysis to determine, establish realistic prospecting model. Surface ore prospecting model of magnesium-rich carbonatite Liaoji granite \shaped structure → hooked fold → blind orebody.

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CLC: > Astronomy,Earth Sciences > Geology > Of ore deposits > Deposit classification > Nonmetal deposit ( Zonglun,)
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