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Petrogenesis of the Dasuji porphyry Mo deposit at the northern margin of North China Craton: Constrains from geochronology, geochemistry and isotopes characteristics
Chen, Peiwen1,2,3; Zeng, Qingdong1,2,3; Wang, Yongbin1,2; Zhou, Tiancheng1,2,3; Yu, Bing1,2,3; Chen, Junqi4
2018-12-01
Source PublicationLITHOS
ISSN0024-4937
Volume322Pages:87-103
AbstractThe Dasuji porphyry Mo deposit is located at the northern margin of North China Craton. Mo mineralization occurs mainly within the intrusions of alkali feldspar granite, granite porphyry, and quartz porphyry, which yield weighted mean Pb-206/U-238 ages (2 sigma) of 227.6 +/- 1.5, 225.7 +/- 1.5, and 224.3 +/- 1.8 Ma, respectively. These ages are indistinguishable to the molybdenite Re-Os isochron age of 223.9 +/- 1.5 Ma (2 sigma). The Dasuji granites show the petrological, mineralogical, geochemical, and geotectonic characteristics of A-type granites. They exhibit low negative epsilon Nd(t) values (-16.7 to -12.6) with corresponding T-DM2 (Nd) ages of 1705-2000 Ma, variable but mainly negative epsilon Hf(t) values (mostly -21.0 to -7.9) with corresponding T-DM2 (Hf) ages of 1715-2728 Ma, and Pb isotopic compositions indicating that the primary magmas were dominantly derived from partial melting of ancient lower crust. In chondrite- and mantle-normalized trace element diagrams, all the granitic rocks show negative anomalies in Ba, Sr, and Eu, and a positive anomaly in Pb. The ratios of LREE/HREE, and (La/Yb)(N) and delta Eu values decrease from the alkali feldspar granite to the granite porphyry and quartz porphyry. These data are attributed to fractional crystallization processes. Fractionation of feldspar, biotite, and possibly K-feldspar produced the variations in major elements and Rb, Sr and Ba, and the distribution of REE are controlled mainly by fractionation of zircon, allanite, minor apatite, and possibly a small quantity of monazite. Together with the regional geology, the data infer that the Dasuji porphyry Mo deposit formed in a post-collision extensional setting during the Late Triassic. (C) 2018 Elsevier BY. All rights reserved.
KeywordZircon U-Pb age A-type granite Sr-Nd-Hf-Pb isotopes Magmatic evolution Dasuji porphyry Mo deposit
DOI10.1016/j.lithos.2018.10.009
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS KeywordA-TYPE GRANITES ; RE-OS AGES ; ASIAN OROGENIC BELT ; INNER-MONGOLIA ; TRACE-ELEMENTS ; CALC-ALKALINE ; GEOLOGICAL CHARACTERISTICS ; MOLYBDENUM DEPOSITS ; BASALTIC MAGMA ; HIGH-PRESSURE
Language英语
Funding ProjectNational Natural Science Foundation of China[41390443] ; National Natural Science Foundation of China[91514301]
Funding OrganizationNational Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
WOS Research AreaGeochemistry & Geophysics ; Mineralogy
WOS SubjectGeochemistry & Geophysics ; Mineralogy
WOS IDWOS:000452817700006
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/90266
Collection矿产资源研究院重点实验室
Corresponding AuthorZeng, Qingdong
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing 100029, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China
4.Inner Mongolia Zhongxi Min Co Ltd, Wulanchabu 012300, Inner Mongolia, Peoples R China
Recommended Citation
GB/T 7714
Chen, Peiwen,Zeng, Qingdong,Wang, Yongbin,et al. Petrogenesis of the Dasuji porphyry Mo deposit at the northern margin of North China Craton: Constrains from geochronology, geochemistry and isotopes characteristics[J]. LITHOS,2018,322:87-103.
APA Chen, Peiwen,Zeng, Qingdong,Wang, Yongbin,Zhou, Tiancheng,Yu, Bing,&Chen, Junqi.(2018).Petrogenesis of the Dasuji porphyry Mo deposit at the northern margin of North China Craton: Constrains from geochronology, geochemistry and isotopes characteristics.LITHOS,322,87-103.
MLA Chen, Peiwen,et al."Petrogenesis of the Dasuji porphyry Mo deposit at the northern margin of North China Craton: Constrains from geochronology, geochemistry and isotopes characteristics".LITHOS 322(2018):87-103.
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