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Characteristics and significance of aegirine and arfvedsonite in Boziguoer Nb-Ta-Zr-Rb-REE deposit related to alkaline granite, Xinjiang
Sun ZhengHao1,2,3; Qin KeZhang1,2,3; Mao YaJing3; Tang DongMei3; Ma DeCheng4
2021-12-01
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume37Issue:12Pages:3687-3711
AbstractAlkaline minerals can record the important information of source area characteristics, magmatic evolution and late mineralization of alkaline rocks, which is an effective means for the study of diagenesis and mineralization of alkaline rocks. Boziguoer Nb-Ta-Zr-Rb-REE deposit is a typical deposit related to alkaline rocks, which is located in the Late Paleozoic orogenic belt of the southern Tianshan-the northern margin of Tarim block. Based on mineralogical study of aegirine and arfvedsonite in the ore-bearing intrusion, combining with its whole rock compositions, this paper reveals the rock types, evolution characteristics, tectonic setting and metallogenic conditions of the intrusion in the Boziguer rare-earth metal deposit. The rock types of ore-bearing intrusion are aegirine arfvedsonite alkali feldspar granite, aegirine arfvedsonite quartz alkali feldspar syenite and aegirine arfvedsonite alkali feldspar syenite. All of the three types of rocks show similar REE and trace element distributions, with enriched LREE and HFSE, depleted HREE and LILE, and a significant negative Eu anomaly, indicating that they are the products of homologous magmatic evolution. The pyroxene group minerals are aegirine, and the amphibole group minerals are arfvedsonite. Aegirine and arfvedsonite show similar distribution patterns of trace and rare earth elements, which are characterized by enriched HREE and depleted LREE with a significant Eu negative anomaly. They all show enrichment in HFSE (Zr, Hf), depletion in LILE, such as Ba and Sr. Trace element and REE distributions of these minerals indicate that the degree of their evolution from low to high is: aegirine arfvedsonite alkali feldspar granite -> aegirine arfvedsonite quartz alkali feldspar syenite -> aegirine arfvedsonite alkali feldspar syenite, showing the formation of the intrusion is controlled by crystallization and differentiation. The arfvedsonite of aegirine arfvedsonite alkali feldspar granite shows a positive anomaly of Ce, indicating a high oxygen fugacity environment at the early stages of its evolution. The crystallization of magnetite in the early lithofacies make the evolution environment of the melt tend to be reduced. The Rb in all rock types is equally distributed, and the rocks of early evolution stage is more enriched in Nb, while that of the late-stage more enriched in REE and Zr. The mineralization of rare earth metals such as Nb, REE, Ta, Zr, Rb and U developed in the alkaline rock belt in the northern margin of Tarim basin is related to the mantle magma underplating caused by mantle plume, and its tectonic setting may be the superposition of mantle plume orogenic belt.
KeywordBoziguoer Alkali granite Aegirine Arfvedsonite Genesis and evolution of magma Characteristics of mineralization Northern margin of Tarim Basin
DOI10.18654/1000-0569/2021.12.07
WOS KeywordA-TYPE GRANITES ; LARGE IGNEOUS PROVINCE ; LA-ICP-MS ; HF ISOTOPIC COMPOSITIONS ; U-PB GEOCHRONOLOGY ; SR-ND ; SOUTH TIANSHAN ; TRACE-ELEMENT ; NW CHINA ; CONTINENTAL GROWTH
Language英语
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000747500200007
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/104885
Collection矿产资源研究院重点实验室
Corresponding AuthorQin KeZhang
Affiliation1.Chinese Acad Sci, Xinjiang Res Ctr Mineral Resource, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
4.701 Team Xinjiang Nonferrous Geoexplorat Bur, Changji 831100, Peoples R China
First Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Mineral Resources, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Sun ZhengHao,Qin KeZhang,Mao YaJing,et al. Characteristics and significance of aegirine and arfvedsonite in Boziguoer Nb-Ta-Zr-Rb-REE deposit related to alkaline granite, Xinjiang[J]. ACTA PETROLOGICA SINICA,2021,37(12):3687-3711.
APA Sun ZhengHao,Qin KeZhang,Mao YaJing,Tang DongMei,&Ma DeCheng.(2021).Characteristics and significance of aegirine and arfvedsonite in Boziguoer Nb-Ta-Zr-Rb-REE deposit related to alkaline granite, Xinjiang.ACTA PETROLOGICA SINICA,37(12),3687-3711.
MLA Sun ZhengHao,et al."Characteristics and significance of aegirine and arfvedsonite in Boziguoer Nb-Ta-Zr-Rb-REE deposit related to alkaline granite, Xinjiang".ACTA PETROLOGICA SINICA 37.12(2021):3687-3711.
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