Thermal conductivity and radioactive heat-producing element content determinations for rocks from Zhangzhou region, SE China, and their constraints on lithospheric thermal regime
详细信息 查看全文
- 作者：Andong Wang ; Zhanxue Sun ; Jinhui Liu ; Jianjun Wan…
- 关键词：Zhangzhou region ; Radiogenic heat production ; Thermal conductivity ; Lithospheric thermal regime
- 刊名：Environmental Earth Sciences
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：75
- 期：17
- 全文大小：1,507 KB
- 刊物类别：Earth and Environmental Science
- 刊物主题：None Assigned
- 出版者：Springer Berlin Heidelberg
- ISSN：1866-6299
- 卷排序：75
文摘
Radioactive heat-producing element content and rock thermal conductivity together with rock density have been determined for rocks from surface and drilling holes within Zhangzhou region, SE China. The results suggest that the average radiogenic heat production rate of granites is 3.70 μW/m3, markedly higher than that of middle-acid volcanic rocks, mafic dykes and sedimentary rocks from the same region. Additionally, the main heat production rate is sourced from the decay heat of U and Th with 40K thermal contribution being less than 10 %. The average rock thermal conductivity is 2.83 W/mK, approaching that of the middle-upper crustal rocks. Our new data, in combination with previous geology, geophysics and geothermics data, indicate that mantle contributes more heat flow than crust to the surface heat flow, i.e., Qm/Qc > 1, and that Zhangzhou region has a relatively thinner crustal thickness.