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Mashhad komatiitic rocks in NE Iran: Origin and implications for the evolution of the Paleo-Tethyan Ocean
Li, Xingbo1,2,3; Miao, Laicheng1,2; Zhang, Fochin1,2; Ghasemi, Habibollah4; Zhu, Shuaiming1,2; Yang, Shunhu1,2
2019-11-01
Source PublicationGEOLOGICAL JOURNAL
ISSN0072-1050
Volume54Issue:6Pages:3314-3334
AbstractMashhad ultramafic volcanic rocks, located within the Paleo-Tethys suture zone in the north-eastern Iran, are composed mainly of komatiitic rocks with interbedded picrobasalts. The Mashhad komatiitic rocks are characterized by low Al2O3/TiO2 ratios (9.85-11.44) and depleted HREE patterns with slightly high (Gd/Yb)(N) ratios (1.48-1.74), similar to those of the Al-depleted Barberton-type komatiites. These rocks have & x190;(Nd) (t) values ranging from +9.0 to +10.4 and initial Sr-87/Sr-86 ratios ranging from 0.7039 to 0.7072, indicating they were derived from a depleted mantle source. They have a total Re-187/Os-188 and Os-187/Os-188 ratios ranging from 0.278 to 72.254 and from 0.12741 to 0.14012, respectively, and display consistent PGE patterns similar to that of the primitive mantle. The picrobasalts have high contents of SiO2 (45.08-48.87 wt.%), MgO (7.28-11.51 wt.%), nearly flat REE pattern, and & x190;(Nd) (t) values ranging from +6.5 to +7.9 and initial Sr-87/Sr-86 ratios focused on 0.7040 and 0.7070, illustrating that they were derived from a relatively enriched source compared with the komatiitic rocks. The thermobarometric calculations suggest that the Mashhad komatiitic rocks were generated by high degree partial melting between 20% and 30% at 1,604-1,681 degrees C and 3.20-4.65 Gpa, essentially consistent with those of the Hawaiian mantle plume (1,500-1,600 degrees C). These new data demonstrate that the Mashhad komatiitic rocks are of a mantle plume origin, which might have caused the opening of the Paleo-Tethyan Ocean, and the mantle plume was likely located beneath or nearby the mid-ridge of the Paleo-Tethyan Ocean when the Mashhad komatiitic lava erupted, a scenario resembling the present Iceland and Ontong Java.
Keywordmantle plume Mashhad komatiitic rock north-east Iran Paleo-Tethyan Ocean
DOI10.1002/gj.3329
Funding OrganizationKey Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China
WOS KeywordPLATE TECTONIC EVOLUTION ; MANTLE PLUMES ; BARBERTON KOMATIITES ; SOUTHERN MARGIN ; FLOOD-BASALT ; GEOCHEMICAL CHARACTERISTICS ; PLUTONIC COMPLEX ; ZIRCON AGES ; THRUST BELT ; SM-ND
Language英语
Funding ProjectKey Research Program of Chinese Academy of Sciences[XDPB11] ; National Natural Science Foundation of China[41772230] ; Ministry of Science and Technology of China[2012FY120100]
Funding OrganizationKey Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; Key Research Program of Chinese Academy of Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China ; Ministry of Science and Technology of China
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000496020400009
PublisherWILEY
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/95693
Collection矿产资源研究院重点实验室
Corresponding AuthorMiao, Laicheng
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, 19 Beitucheng Western Rd, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
4.Shahrood Univ Technol, Fac Earth Sci, Dept Petrol & Econ Geol, Shahrood, Iran
First Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Li, Xingbo,Miao, Laicheng,Zhang, Fochin,et al. Mashhad komatiitic rocks in NE Iran: Origin and implications for the evolution of the Paleo-Tethyan Ocean[J]. GEOLOGICAL JOURNAL,2019,54(6):3314-3334.
APA Li, Xingbo,Miao, Laicheng,Zhang, Fochin,Ghasemi, Habibollah,Zhu, Shuaiming,&Yang, Shunhu.(2019).Mashhad komatiitic rocks in NE Iran: Origin and implications for the evolution of the Paleo-Tethyan Ocean.GEOLOGICAL JOURNAL,54(6),3314-3334.
MLA Li, Xingbo,et al."Mashhad komatiitic rocks in NE Iran: Origin and implications for the evolution of the Paleo-Tethyan Ocean".GEOLOGICAL JOURNAL 54.6(2019):3314-3334.
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