Genesis of the world's largest rare earth element deposit, Bayan Obo, China: Protracted mineralization evolution over similar to 1 b.y
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F18%3A43914245" target="_blank" >RIV/62156489:43410/18:43914245 - isvavai.cz</a>
Výsledek na webu
<a href="https://doi.org/10.1130/G39801.1" target="_blank" >https://doi.org/10.1130/G39801.1</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1130/G39801.1" target="_blank" >10.1130/G39801.1</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Genesis of the world's largest rare earth element deposit, Bayan Obo, China: Protracted mineralization evolution over similar to 1 b.y
Popis výsledku v původním jazyce
The unique, giant, rare earth element (REE) deposit at Bayan Obo, northern China, is the world's largest REE deposit. It is geologically complex, and its genesis is still debated. Here, we report in situ Th-Pb dating and Nd isotope ratios for monazite and Sr isotope ratios for dolomite and apatite from fresh drill cores. The measured monazite ages (361-913 Ma) and previously reported whole-rock Sm-Nd data show a linear relationship with the initial Nd isotope ratio, suggesting a single-stage evolution from a Sm-Nd source that was formed before 913 Ma. All monazites show consistent epsilon(Nd(1.3Ga)) values (0.3 +/- 0.6) close to those of the adjacent 1.3 Ga carbonatite and mafic dikes. The primary dolomite and apatite show lower Sr-87/Sr-86 ratios (0.7024-0.7030) than the recrystallized dolomite (0.7038-0.7097). The REE ores at Bayan Obo are interpreted to have originally formed as products of ca. 1.3 Ga carbonatitic magmatism and to have undergone subsequent thermal perturbations induced by Sr-rich, but REE-poor, metamorphic fluids derived from nearby sedimentary rocks.
Název v anglickém jazyce
Genesis of the world's largest rare earth element deposit, Bayan Obo, China: Protracted mineralization evolution over similar to 1 b.y
Popis výsledku anglicky
The unique, giant, rare earth element (REE) deposit at Bayan Obo, northern China, is the world's largest REE deposit. It is geologically complex, and its genesis is still debated. Here, we report in situ Th-Pb dating and Nd isotope ratios for monazite and Sr isotope ratios for dolomite and apatite from fresh drill cores. The measured monazite ages (361-913 Ma) and previously reported whole-rock Sm-Nd data show a linear relationship with the initial Nd isotope ratio, suggesting a single-stage evolution from a Sm-Nd source that was formed before 913 Ma. All monazites show consistent epsilon(Nd(1.3Ga)) values (0.3 +/- 0.6) close to those of the adjacent 1.3 Ga carbonatite and mafic dikes. The primary dolomite and apatite show lower Sr-87/Sr-86 ratios (0.7024-0.7030) than the recrystallized dolomite (0.7038-0.7097). The REE ores at Bayan Obo are interpreted to have originally formed as products of ca. 1.3 Ga carbonatitic magmatism and to have undergone subsequent thermal perturbations induced by Sr-rich, but REE-poor, metamorphic fluids derived from nearby sedimentary rocks.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
10505 - Geology
Návaznosti výsledku
Projekt
—
Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2018
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Geology
ISSN
0091-7613
e-ISSN
—
Svazek periodika
46
Číslo periodika v rámci svazku
4
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
4
Strana od-do
323-326
Kód UT WoS článku
000428011100011
EID výsledku v databázi Scopus
2-s2.0-85044272628