Academic Journal
Late Cretaceous age of the Crucea uranium ore deposit, East Carpathians, Romania
| العنوان: | Late Cretaceous age of the Crucea uranium ore deposit, East Carpathians, Romania |
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| المؤلفون: | Emilie E. Bowman, Mihai N. Ducea, Lucian Petrescu |
| المصدر: | Results in Geochemistry, Vol 1, Iss , Pp 100002- (2020) |
| بيانات النشر: | Elsevier |
| سنة النشر: | 2020 |
| المجموعة: | Directory of Open Access Journals: DOAJ Articles |
| مصطلحات موضوعية: | Uraninite, East Carpathians, Geochronology, Fold and thrust belt, Chemistry, QD1-999, Geology, QE1-996.5 |
| الوصف: | U-Th-Pb chemical dating is a suitable technique for determining ages of minerals (e.g., uraninite, monazite) that have large amounts of U and/or Th such that the radiogenic Pb can be measured. We investigate the chemical age of bitumen-supported uraninite from the vein-type Crucea uranium deposit, which is located in the Tulghes Series basement of the East Carpathians. We find that uraninite has a crystallization age of 88.8 ± 4.9 Ma, much younger than the Paleozoic age of magmatic emplacement and metamorphism of the host rock. The age of uraninite mineralization corresponds well with the timing of Mid-to-Late Cretaceous thrust faulting in the East Carpathians fold and thrust belt, during which the Tulghes Series was thrust over organic carbon-rich black shales of the Ceahlau and Moldavides nappes. These thrust faults likely acted as conduits through which U-rich carbonaceous matter, extracted from the black shales, migrated upward to be emplaced as veins. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 2666-2779 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S2666277920300022; https://doaj.org/toc/2666-2779; https://doaj.org/article/443747c221a041c5be53f3ec2f70f561 |
| DOI: | 10.1016/j.ringeo.2020.100002 |
| الاتاحة: | https://doi.org/10.1016/j.ringeo.2020.100002 https://doaj.org/article/443747c221a041c5be53f3ec2f70f561 |
| رقم الانضمام: | edsbas.6495CD31 |
| قاعدة البيانات: | BASE |
| تدمد: | 26662779 |
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| DOI: | 10.1016/j.ringeo.2020.100002 |