| Citation: |
LI Yan. GEOCHEMICAL CHARACTERISTICS OF THE SANDSTONE FROM HOUSHIGOU FORMATION IN SOUTHERN SANJIANG BASIN: Geological Implication[J]. Geology and Resources, 2024, 33(3): 315-322. doi: 10.13686/j.cnki.dzyzy.2024.03.006
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GEOCHEMICAL CHARACTERISTICS OF THE SANDSTONE FROM HOUSHIGOU FORMATION IN SOUTHERN SANJIANG BASIN: Geological Implication
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Abstract
The Cretaceous Houshigou Formation in Sanjiang Basin is the main ore-bearing layer of uranium deposit, developed with a large area of grey and light yellow gravel fine-medium sandstone. Taking the sandstone of Houshigou Formation in Songmuhe sag as the study object, the paper discusses the provenance composition, weathering intensity and tectonic setting of Houshigou Formation on the basis of detailed petrological and geochemical characteristics. The results show that the formation is mainly feldspar and lithic sandstone, with the major element SiO2 content of 58.91%-71.51%, total alkali content of 4.59%-10.05%, and Al content of 12.87%-16.12%. The total content of rare earth element (∑REE) is 100.72×10-6-171.34×10-6, averagely 134.532×10-6, with obvious negative Eu anomaly (δEu=0.27-0.84), indicating that the rock originates from the upper crust. The element geochemical characteristics reveal that CIA is 13.13-45.25, ICV 0.74-1.02 and PIA 53.08-67.90, indicating that the sedimentary period of Houshigou Formation was in arid-semi arid environment, and the source area experienced weak weathering. The Sr/Ba ratio is mostly less than 1, the equivalent B content mostly less than 200×10-6 and the SiO2/Al2O3 ratio averagely 4.35, indicating that the sedimentary period of Houshigou Formation was in low salinity environment. The sandstone has the geochemical properties of active continental margin. Combined with the regional evolution history, it is believed that the source area should be the felsic rock developed in Jiamusi uplift.
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Keywords:
- Houshigou Formation /
- uranium deposit /
- sandstone /
- geochemistry /
- Songmuhe sag /
- Sanjiang Basin
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References
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LI Yan. GEOCHEMICAL CHARACTERISTICS OF THE SANDSTONE FROM HOUSHIGOU FORMATION IN SOUTHERN SANJIANG BASIN: Geological Implication[J]. Geology and Resources, 2024, 33(3): 315-322. doi: 10.13686/j.cnki.dzyzy.2024.03.006
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Figure 1.
Geological map of Songmuhe sag
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Figure 2.
Petrological characteristics of the sandstone from Houshigou Formation in Songmuhe sag
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Figure 3.
Nomenclature diagram of sandstone from Houshigou Formation in Songmuhe sag
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Figure 4.
Harker diagrams of sandstone from Houshigou Formation in Songmuhe sag
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Figure 5.
Chondrite-normalized REE patterns and primitive mantle-normalized trace element spidergram of the sandstone from Houshigou Formation in Songmuhe sag
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Figure 6.
The Th/Sc-Zr/Sc diagram of sandstone from Houshigou Formation in Songmuhe sag (After Reference[9])
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Figure 7.
The CIA-ICV and ICV-CIA diagrams of sandstone from Houshigou Formation in Songmuhe sag(After Reference[12])
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Figure 8.
Source rock discrimination diagrams of major and trace elements in the sandstone of Houshigou Formation in Songmuhe sag (After References[13-16])
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Figure 9.
Tectonic discrimination diagrams of the sandstone from Houshigou Formation in Songmuhe sag