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Delineation of the Late Triassic granitic pluton from the middle part of Greater Xing' an Mountains showing tetrad REE patterns and its geological implications.
Alternative TitleDelineation of the Late Triassic granitic pluton from the middle part of Greater Xing' an Mountains showing tetrad REE patterns and its geological implications
Li ShiChao1; Li YongFei2; Wang XingAn3; Zhu Kai1
2016
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume32Issue:9Pages:2793-2806
AbstractThe Budunhua pluton is located in the Horqin Right Wing Middle Banner, eastern part of the Central Asia Orogenic Belt. The pluton is mainly composed of medium-fine grained two-mica granites and porphyritic fine-grained muscovite granites. The LA-MCICP-MS U-Pb dating of the zircons indicate that the Budunhua pluton was emplaced in the Late Triassic. The rocks have high SiO2 (73.73% similar to 78. 33%) and(Na2O + K2O) ( 7. 07% similar to 9. 06%) contents, poor CaO (0. 01% similar to 0. 87%) and MgO ( 0. 12% 0. 52%) contents, A/CNK = 1. 02 similar to 1. 23, belong to high-K calcalkaline series. The petrogeochemistry of rare earth element is characterized by strong depletion of Eu, and showing an M-type tetrad pattern. These characteristics indicate that the Budunhua pluton belongs to highly fractionated I-type granites. Zircon epsilon(Hf)(t) values for the Budunhua pluton range from 7. 0 to 12. 4, two-stage model ages (t(DM2)) ranging from 812Ma to 473 Ma. Combining with regional geologic data, the primary magma of Budunhua pluton was derived from partial melting of juvenile crustal material from Neoproterozoic to Early Paleozoic, and formed in the extensional tectonic environment after the closure of the Paleo-Asian Ocean. The tetrad effect granite in Budunhua area with high 1REE and evolution occurred after the intrusion of the primary magma, suggesting that the granite have prospects of REE mineralization.
KeywordA-TYPE GRANITES NE CHINA CONSTRAINTS U-PB ISOTOPE INNER-MONGOLIA TECTONIC EVOLUTION VOLCANIC-ROCKS OROGENIC BELT ZIRCON HF PETROGENESIS Budunhua Tetrad effect Rare metal minerals Late Triassic Greater Xing' an Mountains
Indexed ByCSCD
Language英语
CSCD IDCSCD:5789780
Citation statistics
Cited Times:7[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/145310
Collection中国科学院金属研究所
Affiliation1.吉林大学
2.中国科学院金属研究所
3.东北师范大学
Recommended Citation
GB/T 7714
Li ShiChao,Li YongFei,Wang XingAn,et al. Delineation of the Late Triassic granitic pluton from the middle part of Greater Xing' an Mountains showing tetrad REE patterns and its geological implications.[J]. ACTA PETROLOGICA SINICA,2016,32(9):2793-2806.
APA Li ShiChao,Li YongFei,Wang XingAn,&Zhu Kai.(2016).Delineation of the Late Triassic granitic pluton from the middle part of Greater Xing' an Mountains showing tetrad REE patterns and its geological implications..ACTA PETROLOGICA SINICA,32(9),2793-2806.
MLA Li ShiChao,et al."Delineation of the Late Triassic granitic pluton from the middle part of Greater Xing' an Mountains showing tetrad REE patterns and its geological implications.".ACTA PETROLOGICA SINICA 32.9(2016):2793-2806.
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