کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5484018 | 1522784 | 2017 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Distribution of radioactive elements (U, Th) in the upper Paleozoic coal-bearing strata of the eastern Ordos basin
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی اقتصادی
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چکیده انگلیسی
The presence of radioactive elements are detected by more 50 well loggings and plotted spatially and vertically to image their distribution, in the eastern Ordos basin. The radioactive element is investigated through quantitative methods, such as inductively coupled plasma mass spectrometry and X-ray diffraction. Results show the presence of three significantly high radioactivity of natural gamma-ray (GR) layers: (1) Kf with GR content ranging from 120.5 to 738.1 API, 2.93-39.97Â ppm of U, and 8.4-97.93Â ppm of Th, (2) Kd with GR content ranging from 121.2 to 475 API, 3.17-40.03Â ppm of U, and 4.26-42.63Â ppm of Th, and (3) Kb with GR content ranging from 117.4 to 453.4 API, 1.26-47.47Â ppm of U, and 2.37-84.11Â ppm of Th. The high concentrations of U and Th in coal-bearing deposits are spatially related to the rock blocks in the vicinity of the folded margins, which are rich in elements and are related to syndepositional volcanism before coal formation. The layers with significantly high radioactive content of U and Th might play a role in promoting and catalysing the hydrocarbon generation of coal-bearing hydrocarbon source rocks, which are also the reliable precise chronostratigraphic markers in continental strata for lacking of reliable marine markers.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Petroleum Science and Engineering - Volume 157, August 2017, Pages 1130-1142
Journal: Journal of Petroleum Science and Engineering - Volume 157, August 2017, Pages 1130-1142
نویسندگان
Yulin Shen, Yinghai Guo, Zhuangfu Li, Xinshan Wei, Liangxi Xue, Jinbang Liu,