The Volume of Granitic Batholiths in Main Helium Source Rocks of Weihe Basin and the Estimation of Their Helium Production: A Case Study of the Lantian Batholith

HU Mingqing; ZHANG Qiao; YANG Haixing; HAN Wei; XU Xiaohu; MA Zhuang

doi:10.12401/j.nwg.2024133

Northwestern Geology > 2025 > Accepted Manuscript > DOI: 10.12401/j.nwg.2024133

HU Mingqing，ZHANG Qiao，YANG Haixing，et al. The Volume of Granitic Batholiths in Main Helium Source Rocks of Weihe Basin and the Estimation of Their Helium Production: A Case Study of the Lantian Batholith[J]. Northwestern Geology，2025，58（5）：1−9. doi: 10.12401/j.nwg.2024133

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The Volume of Granitic Batholiths in Main Helium Source Rocks of Weihe Basin and the Estimation of Their Helium Production: A Case Study of the Lantian Batholith

HU Mingqing^{1, 2,},
ZHANG Qiao^{3, 4, ,},
YANG Haixing^{1, 2},
HAN Wei^{3, 4},
XU Xiaohu^{1, 2},
MA Zhuang^{1, 2}

1.
National Engineering Research Center of China United Coalbed Methane Co., Ltd., Beijing 100095
2.
PetroChina Coalbed Methane Co., Ltd., Beijing 100028
3.
Xi’an Center, China Geology Survey, Geosciences Innovation Center of Northwest China, Xi’an 710054, Shaanxi, China
4.
Research Center for Helium, China Geology Survey, Xi’an 710054, Shaanxi, China

More Information

Received Date: November 11, 2024
Revised Date: January 01, 2025
Accepted Date: January 03, 2025
Available Online: March 23, 2025

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Abstract

Abstract

As the key of helium resource evaluation, the evaluation of helium source rocks mainly consist of rock type, contents of helium-derived elements uranium and thorium, formation age and volume. Granite is viewed as the main helium source rock and first three parameters are readily accessable. However, the volume of granite is too complicated to be constrained. The Weihe basin provides an ideal area for this parameter, where the basin show great potential for helium resources and enormous granitic batholiths cropped out at the southern magin of the basin are considered to the main helium reservoir for crustal-derived helium. In this study, the Lantian batholith is selected and the shape of it is near to a flat elliptical column with high length-width ratio based on the published geological and geophysical data. Moreover, the thickness of Lantian batholith is calculated to be 4.7 km and the volume is 572 km³ according to a power-law relationship. In addition, the results show that the average contents of helium-produced elements U and Th are 5.8 and 19 ppm in Lantian batholith. Combined with the radioactive decay law, the calculated helium production for the Lantian batholith is about 0.27 billion cubic meters. In view of voluminous granitic batholiths at the south edge of the Weihe basin, total helium productions have been evaluated and will provide significant implications for the exploration breakthrough of helium in the Weihe Basin and further establishment of the evaluation of helium resources.
- Helium source rock,
- granite,
- volume,
- helium production

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References (51)

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The Volume of Granitic Batholiths in Main Helium Source Rocks of Weihe Basin and the Estimation of Their Helium Production: A Case Study of the Lantian Batholith