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
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی اقتصادی
پیش نمایش صفحه اول مقاله
Distribution of radioactive elements (U, Th) in the upper Paleozoic coal-bearing strata of the eastern Ordos basin
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, 2.93-39.97 ppm of U, and 8.4-97.93 ppm of Th, (2) Kd with GR content ranging from 121.2 to 475 API, 3.17-40.03 ppm of U, and 4.26-42.63 ppm of Th, and (3) Kb with GR content ranging from 117.4 to 453.4 API, 1.26-47.47 ppm of U, and 2.37-84.11 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
نویسندگان
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