Age data of monazite and zircon from rare metal bearing pegmatite and carbonatite in Tashkurgan County, Xinjiang

Age data of monazite and zircon from rare metal bearing pegmatite and carbonatite in Tashkurgan County, Xinjiang


The data are monazite and zircon U-Pb ages. Three samples of carbonatite and pegmatite were collected (2018kl06 is carbonatite, 2018kl101 is tourmaline bearing pegmatite near carbonatite, 2018kl08-2 is beryl bearing pegmatite). After crushing, heavy sand minerals were separated by manual elutriation. After magnetic and electromagnetic separation, monazite (about 500 grains) and zircon (more than 1000 grains) were picked out under binocular lens. After selecting representative monazite as target, the internal structure of monazite was studied by BSE through microscope transmission light and reflection light photography. U-Pb chronology was completed on the 193 nm laser ablation system (new wave) and multi receiver inductively coupled plasma mass spectrometer in the laboratory of Tianjin Institute of Geology and mineral resources. In 2018kl06 carbonatite, the intersection age of the reverse inconsistency line of 17 test points is 18.2 ± 0.3 Ma, while the average age of 9 test points with complete harmony is 18.15 ± 0.22 Ma; The monazite of sample 2018kl101 obtained 15 measuring points with concordance greater than 90%, and the average age is 19.39 ± 0.36 Ma; The average age of 20 zircon sites of sample 2018kl08-2 is 197.5 ± 1.4 ma. They are Cenozoic and Mesozoic (19 ~ 18 Ma and 200 MA), respectively. The early beryl bearing pegmatite was formed in the extension stage after the closure of the paleoTethys ocean, while the Cenozoic bastnaesite carbonatite pegmatite assemblage is related to the Cenozoic intracontinental strike slip extension event, indicating that the extension strike slip of Pamir structural junction may start at 19 ma. Combined with the characteristics of regional geochemical anomalies, it shows that a breakthrough in rare and light rare earth prospecting is expected in Pamir area.


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The data is stored in Excel format. The file name is "monzirage", which represents monazite and zircon ages


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Cite as:

Wang, W. (2021). Age data of monazite and zircon from rare metal bearing pegmatite and carbonatite in Tashkurgan County, Xinjiang. National Tibetan Plateau Data Center, DOI: 10. 16509/ j. georeview. 2021. 03. 147. (Download the reference: RIS | Bibtex )

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Keywords
Geographic coverage
East: 76.00 West: 75.00
South: 37.00 North: 38.00
Details
  • Temporal resolution: 1000 year < x
  • Spatial resolution: 0.5º - 1º
  • File size: 0.022 MB
  • Views: 179
  • Downloads: 0
  • Access: Requestable
  • Temporal coverage: 200-18 million years ago
  • Updated time: 2021-11-22
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: WANG Wei  

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Email: data@itpcas.ac.cn

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