Petrogenesis and mineralization of REE-rich granites in Qingxi and Guanxi, Nanling region, South China

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F17%3A43912992" target="_blank" >RIV/62156489:43410/17:43912992 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.oregeorev.2016.10.021" target="_blank" >http://dx.doi.org/10.1016/j.oregeorev.2016.10.021</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.oregeorev.2016.10.021" target="_blank" >10.1016/j.oregeorev.2016.10.021</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Petrogenesis and mineralization of REE-rich granites in Qingxi and Guanxi, Nanling region, South China

Popis výsledku v původním jazyce

Mesozoic granites in the Nanling region, South China, are important primary rocks for ion-adsorption rare earth element (REE) deposits. Moreover, metallic deposits of W, Sn, Nb and Ta also develop in these granites, most of which formed in the Late Jurassic. The Qingxi and Guanxi granites in the Nanling region contain abundant REE minerals and have zircon U-Pb ages of 223.0 +/- 0.7 Ma and 198.8 +/- 1.4 Ma, respectively. They are of metaluminous to slightly peraluminous in character having a high K talc-alkaline composition, and have high K2O + Na2O and FeOT + MgO contents and a Ga/Al ratio similar to A-type granites. These granites plot into the post-collision field, similar to the A2-type granites. The Qingxi and Guanxi granites indicate a crust dominant origin by having high levels of Rb and Th relative to Nb and Ta normalized to ocean-ridge granites. They are characterized by LREE enrichment and the majority of REE accumulating in the primary REE minerals include REE-phosphates and fluorocarbonates. The Guanxi rocks have a stronger negative Eu anomaly, but lower REE composition than the Qingxi granites, implying that the basement may have played an important role in the REE mineralization rather than fractional crystallization. This further implies that the basement in South China may have been subjected to different evolutionary geodynamics, resulting in different multi metallic mineralization of W-Sn-Nb-Ta-REE hosted by large scale Mesozoic granites.

Název v anglickém jazyce

Petrogenesis and mineralization of REE-rich granites in Qingxi and Guanxi, Nanling region, South China

Popis výsledku anglicky

Mesozoic granites in the Nanling region, South China, are important primary rocks for ion-adsorption rare earth element (REE) deposits. Moreover, metallic deposits of W, Sn, Nb and Ta also develop in these granites, most of which formed in the Late Jurassic. The Qingxi and Guanxi granites in the Nanling region contain abundant REE minerals and have zircon U-Pb ages of 223.0 +/- 0.7 Ma and 198.8 +/- 1.4 Ma, respectively. They are of metaluminous to slightly peraluminous in character having a high K talc-alkaline composition, and have high K2O + Na2O and FeOT + MgO contents and a Ga/Al ratio similar to A-type granites. These granites plot into the post-collision field, similar to the A2-type granites. The Qingxi and Guanxi granites indicate a crust dominant origin by having high levels of Rb and Th relative to Nb and Ta normalized to ocean-ridge granites. They are characterized by LREE enrichment and the majority of REE accumulating in the primary REE minerals include REE-phosphates and fluorocarbonates. The Guanxi rocks have a stronger negative Eu anomaly, but lower REE composition than the Qingxi granites, implying that the basement may have played an important role in the REE mineralization rather than fractional crystallization. This further implies that the basement in South China may have been subjected to different evolutionary geodynamics, resulting in different multi metallic mineralization of W-Sn-Nb-Ta-REE hosted by large scale Mesozoic granites.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Ore Geology Reviews

ISSN

0169-1368

e-ISSN

—

Svazek periodika

81

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

17

Strana od-do

309-325

Kód UT WoS článku

000390970200022

EID výsledku v databázi Scopus

2-s2.0-85001018516