Geological Significance of Rare Earth Elements in Marine Shale of the Upper Permian Dalong Formation in the Lower Yangtze Region, South China
The rare earth elements (REEs) provide significant geological information and serve as a reliable indicator for predicting the paleoclimate, paleoenvironment, and paleotectonic evolution of sedimentary rocks. The REEs, major elements, and trace elements of 75 marine shale samples collected from the...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-09-01
|
| Series: | Minerals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-163X/13/9/1195 |
| _version_ | 1797578709062909952 |
|---|---|
| author | Chaogang Fang Chengcheng Zhang Ning Huang Long Teng Chunhai Li Wei Shao Min Zeng |
| author_facet | Chaogang Fang Chengcheng Zhang Ning Huang Long Teng Chunhai Li Wei Shao Min Zeng |
| author_sort | Chaogang Fang |
| collection | DOAJ |
| description | The rare earth elements (REEs) provide significant geological information and serve as a reliable indicator for predicting the paleoclimate, paleoenvironment, and paleotectonic evolution of sedimentary rocks. The REEs, major elements, and trace elements of 75 marine shale samples collected from the Late Permian Dalong Formation at the Fantiansi (FTS) and Putaoling (PTL) sections in the Lower Yangtze region were analyzed. The results revealed that the major elements Al<sub>2</sub>O<sub>3</sub>, K<sub>2</sub>O, and TiO<sub>2</sub> were primarily influenced by clay minerals associated with terrigenous detrital, whereas SiO<sub>2</sub> and Na<sub>2</sub>O were not affected by clay minerals. The ΣREE values obtained from the Late Permian Dalong Formation at the Fantiansi (FTS) and Putaoling (PTL) sections in the Lower Yangtze region were found to be lower than those of the Post-Archean Average Shale (PAAS) (184.8 μg/g). The study of REE indicators related to the source, redox conditions, and tectonic settings led to the following conclusions: (a) ΣREE showed strong positive correlations with TiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>, K<sub>2</sub>O, and Na<sub>2</sub>O, but exhibited relatively weak correlations with Fe<sub>2</sub>O<sub>3</sub> and P<sub>2</sub>O<sub>5</sub>, suggesting that REEs were mainly associated with clay minerals, but were also influenced by pyrite, phosphates, and other minerals; (b) The high values of Ce/Ce*, Mo<sub>EF</sub>, U<sub>EF</sub>, and C<sub>org</sub>/P were mainly concentrated in Stages I, II, III and V of the Dalong Formation at the FTS and PTL sections, and the corresponding strong anoxic environment was more conducive to the preservation of organic matter; (c) The diagram between La/Yb and ΣREE, Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub>, TiO<sub>2</sub>-Zr, and La/Th-Hf bivariate diagrams indicated that the provenance of the rocks from the Dalong formations was primarily felsic igneous rocks; (d) Discriminant-function diagrams and La-Th-Sc, Th-Sc-Zr/10 and Th-Co-Zr/10 triangular diagrams show that the clastic sediments of the Dalong formations were derived most likely from continental island arcs. This study corresponds to the background of the transition from continental margin to continental collision structure in South China during the Late Permian. |
| first_indexed | 2024-03-10T22:26:37Z |
| format | Article |
| id | doaj.art-eeee7d5adf0a4d0b95c0b244742cd058 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-10T22:26:37Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-eeee7d5adf0a4d0b95c0b244742cd0582023-11-19T12:05:39ZengMDPI AGMinerals2075-163X2023-09-01139119510.3390/min13091195Geological Significance of Rare Earth Elements in Marine Shale of the Upper Permian Dalong Formation in the Lower Yangtze Region, South ChinaChaogang Fang0Chengcheng Zhang1Ning Huang2Long Teng3Chunhai Li4Wei Shao5Min Zeng6Nanjing Center, China Geological Survey, Nanjing 210016, ChinaNanjing Center, China Geological Survey, Nanjing 210016, ChinaNanjing Center, China Geological Survey, Nanjing 210016, ChinaNanjing Center, China Geological Survey, Nanjing 210016, ChinaHarbin Natural Resources Comprehensive Investigation Center, China Geological Survey, Harbin 150081, ChinaNanjing Center, China Geological Survey, Nanjing 210016, ChinaSchool of Earth Sciences, Yunnan University, Kunming 650500, ChinaThe rare earth elements (REEs) provide significant geological information and serve as a reliable indicator for predicting the paleoclimate, paleoenvironment, and paleotectonic evolution of sedimentary rocks. The REEs, major elements, and trace elements of 75 marine shale samples collected from the Late Permian Dalong Formation at the Fantiansi (FTS) and Putaoling (PTL) sections in the Lower Yangtze region were analyzed. The results revealed that the major elements Al<sub>2</sub>O<sub>3</sub>, K<sub>2</sub>O, and TiO<sub>2</sub> were primarily influenced by clay minerals associated with terrigenous detrital, whereas SiO<sub>2</sub> and Na<sub>2</sub>O were not affected by clay minerals. The ΣREE values obtained from the Late Permian Dalong Formation at the Fantiansi (FTS) and Putaoling (PTL) sections in the Lower Yangtze region were found to be lower than those of the Post-Archean Average Shale (PAAS) (184.8 μg/g). The study of REE indicators related to the source, redox conditions, and tectonic settings led to the following conclusions: (a) ΣREE showed strong positive correlations with TiO<sub>2</sub>, Al<sub>2</sub>O<sub>3</sub>, K<sub>2</sub>O, and Na<sub>2</sub>O, but exhibited relatively weak correlations with Fe<sub>2</sub>O<sub>3</sub> and P<sub>2</sub>O<sub>5</sub>, suggesting that REEs were mainly associated with clay minerals, but were also influenced by pyrite, phosphates, and other minerals; (b) The high values of Ce/Ce*, Mo<sub>EF</sub>, U<sub>EF</sub>, and C<sub>org</sub>/P were mainly concentrated in Stages I, II, III and V of the Dalong Formation at the FTS and PTL sections, and the corresponding strong anoxic environment was more conducive to the preservation of organic matter; (c) The diagram between La/Yb and ΣREE, Al<sub>2</sub>O<sub>3</sub>-TiO<sub>2</sub>, TiO<sub>2</sub>-Zr, and La/Th-Hf bivariate diagrams indicated that the provenance of the rocks from the Dalong formations was primarily felsic igneous rocks; (d) Discriminant-function diagrams and La-Th-Sc, Th-Sc-Zr/10 and Th-Co-Zr/10 triangular diagrams show that the clastic sediments of the Dalong formations were derived most likely from continental island arcs. This study corresponds to the background of the transition from continental margin to continental collision structure in South China during the Late Permian.https://www.mdpi.com/2075-163X/13/9/1195Upper Permianmarine shaleREEspaleoenvironmenttectonic settingLower Yangtze region |
| spellingShingle | Chaogang Fang Chengcheng Zhang Ning Huang Long Teng Chunhai Li Wei Shao Min Zeng Geological Significance of Rare Earth Elements in Marine Shale of the Upper Permian Dalong Formation in the Lower Yangtze Region, South China Minerals Upper Permian marine shale REEs paleoenvironment tectonic setting Lower Yangtze region |
| title | Geological Significance of Rare Earth Elements in Marine Shale of the Upper Permian Dalong Formation in the Lower Yangtze Region, South China |
| title_full | Geological Significance of Rare Earth Elements in Marine Shale of the Upper Permian Dalong Formation in the Lower Yangtze Region, South China |
| title_fullStr | Geological Significance of Rare Earth Elements in Marine Shale of the Upper Permian Dalong Formation in the Lower Yangtze Region, South China |
| title_full_unstemmed | Geological Significance of Rare Earth Elements in Marine Shale of the Upper Permian Dalong Formation in the Lower Yangtze Region, South China |
| title_short | Geological Significance of Rare Earth Elements in Marine Shale of the Upper Permian Dalong Formation in the Lower Yangtze Region, South China |
| title_sort | geological significance of rare earth elements in marine shale of the upper permian dalong formation in the lower yangtze region south china |
| topic | Upper Permian marine shale REEs paleoenvironment tectonic setting Lower Yangtze region |
| url | https://www.mdpi.com/2075-163X/13/9/1195 |
| work_keys_str_mv | AT chaogangfang geologicalsignificanceofrareearthelementsinmarineshaleoftheupperpermiandalongformationintheloweryangtzeregionsouthchina AT chengchengzhang geologicalsignificanceofrareearthelementsinmarineshaleoftheupperpermiandalongformationintheloweryangtzeregionsouthchina AT ninghuang geologicalsignificanceofrareearthelementsinmarineshaleoftheupperpermiandalongformationintheloweryangtzeregionsouthchina AT longteng geologicalsignificanceofrareearthelementsinmarineshaleoftheupperpermiandalongformationintheloweryangtzeregionsouthchina AT chunhaili geologicalsignificanceofrareearthelementsinmarineshaleoftheupperpermiandalongformationintheloweryangtzeregionsouthchina AT weishao geologicalsignificanceofrareearthelementsinmarineshaleoftheupperpermiandalongformationintheloweryangtzeregionsouthchina AT minzeng geologicalsignificanceofrareearthelementsinmarineshaleoftheupperpermiandalongformationintheloweryangtzeregionsouthchina |