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Geochemistry of Fluorite and Its Genesis in Sickl Area,Tarim Basin

Song Jin-min

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Abstract

Geochemistry of fluorite deposits and its ore rocks in Sickl area,Tarim Basin is applied to investigate the ingenesis.The study shows that: relative LREE concentration and positive Eu anomaly are resulted from REE distribution pattern diagrams of fluorite;Eu,Sr and Ba are related closely in trace element analysis;the isotope ratio of Sr in fluorite is close to that in surrounding rocks.Conclusions are: ore-forming fluids of the fluorite mainly are from the infiltration of heated basin brine;trace elements(including REE) are from underlying strata and surrounding rocks;and elementsF,Ba,Eu are from Lower Cambrian siliceous rocks and phosphorite.

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What this paper is about

Geochemistry of fluorite deposits and its ore rocks in Sickl area,Tarim Basin is applied to investigate the ingenesis.The study shows that: relative LREE concentration and positive Eu anomaly are resulted from REE distribution pattern diagrams of fluorite;Eu,Sr and Ba are related closely in trace element analysis;the isotope ratio of Sr in fluorite is close to that in surrounding rocks.Conclusions are: ore-forming fluids of the fluorite mainly are from the infiltration of heated basin brine;trace elements(including REE) are from underlying strata and surrounding rocks;and elementsF,Ba,Eu are from Lower Cambrian siliceous rocks and phosphorite.

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Available abstract

Geochemistry of fluorite deposits and its ore rocks in Sickl area,Tarim Basin is applied to investigate the ingenesis.The study shows that: relative LREE concentration and positive Eu anomaly are resulted from REE distribution pattern diagrams of fluorite;Eu,Sr and Ba are related closely in trace element analysis;the isotope ratio of Sr in fluorite is close to that in surrounding rocks.Conclusions are: ore-forming fluids of the fluorite mainly are from the infiltration of heated basin brine;trace elements(including REE) are from underlying strata and surrounding rocks;and elementsF,Ba,Eu are from Lower Cambrian siliceous rocks and phosphorite.

Key concepts: Fluorite, Geochemistry, Geology, Isotope geochemistry, Tarim basin, Trace element, Rare-earth element, Structural basin

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