Geochemical and Nd-Sr Isotopic Compositions of Hypabyssal Adakites in the Torud-Ahmad Abad Magmatic Belt, Northern Central Iran Zone: Analysis of Petrogenesis and Geodynamic Implications
文献类型：期刊论文
| 作者 | Yousefi, Fazilat3; Mills, Ryan D.2; Sadeghian, Mahmoud1; Lentz, David R.3; Wanhainen, Christina5; Ghasemi, Habibollah1; Miao, Laicheng4 |
| 刊名 | JOURNAL OF EARTH SCIENCE
 |
| 出版日期 | 2021-01-07 |
| 页码 | 17 |
| ISSN号 | 1674-487X |
| 关键词 | isotope geochemistry adakite rocks Central Iran zone Shahrood Iran |
| DOI | 10.1007/s12583-020-1378-7 |
| 英文摘要 | Eocene intermediate to felsic subvolcanic rocks of the Torud-Ahmad Abad magmatic belt (TAMB), in the northern part of the Central Iran zone, are exposed between the Torud and Ahmad Abad regions in South-Southeast Shahrood. These igneous rocks include hypabyssal dacite, trachyte, andesite, trachy-andesite, and basaltic andesite; they are mainly composed of phenocrysts and microcrystalline groundmass of pyroxene, amphibole, and plagioclase, with minor biotite and titanomagnetite; they form domal structures (plugs and stocks), dikes, and sills that intruded into Neoproterozoic to cogenetic Eocene volcano-sedimentary sequences. Based on isotopic analysis of these intermediate to acidic rocks, initial ratios of Nd-143/Nd-144 range from 0.512 775 to 0.512 893 and initial ratios of Sr-87/Sr-86 range from 0.703 746 to 0.705 314, with quite positive epsilon(Nd(i)) values of +3.69 to +6.00. They are enriched in light rare earth elements and large ion lithophile elements and depleted in heavy rare earth elements and high-field strength elements, the SiO2 content is (52-62) wt.%, and Na2O content >3 wt.%, Al2O3 content >16 wt.%, Yb <1.8 ppm, and Y <18 ppm. These geological, geochemical, and Sr and Nd isotopic data are consistent with adakitic signatures originating by partial melting of the subducted Neo-Tethys oceanic slab (Sabzevar branch) and lithospheric suprasubduction zone mantle. The mantle signatures typifying the rapidly emplaced adakitic rocks (slab (high-silica adakite) and suprasubduction zone (low-silica adakite) melts) together with their locally voluminous extent are evidences that support a locally extensional geodynamic setting; and the evidence is consistent with an evolution to local transpression in the Late Eocene in this convergent margin arc environment to rifting (basalts to adakites) towards submarine conditions in the Neogene. |
| WOS关键词 | SANANDAJ-SIRJAN ZONE ; CALC-ALKALINE ; EASTERN PONTIDES ; CONTINENTAL COLLISION ; CENOZOIC EVOLUTION ; GEOLOGICAL SAMPLES ; PLATE-TECTONICS ; VOLCANIC-ROCKS ; ARC MAGMATISM ; NE IRAN |
| 资助项目 | NSERC |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| 出版者 | CHINA UNIV GEOSCIENCES, WUHAN |
| WOS记录号 | WOS:000605885400002 |
| 资助机构 | NSERC ; NSERC ; NSERC ; NSERC ; NSERC ; NSERC ; NSERC ; NSERC |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/99996]  |
| 专题 | 地质与地球物理研究所_中国科学院矿产资源研究重点实验室 |
| 通讯作者 | Yousefi, Fazilat |
| 作者单位 | 1.Shahrood Univ Technol, Fac Earth Sci, Shahrood, Iran 2.Univ N Carolina, Dept Geol Sci, Chapel Hill, NC 27515 USA 3.Univ New Brunswick, Dept Earth Sci, Fredericton, NB, Canada 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 5.Lulea Univ Technol, Dept Civil Environm & Nat Resources Engn, Lulea, Sweden |
| 推荐引用方式 GB/T 7714 | Yousefi, Fazilat,Mills, Ryan D.,Sadeghian, Mahmoud,et al. Geochemical and Nd-Sr Isotopic Compositions of Hypabyssal Adakites in the Torud-Ahmad Abad Magmatic Belt, Northern Central Iran Zone: Analysis of Petrogenesis and Geodynamic Implications[J]. JOURNAL OF EARTH SCIENCE,2021:17. |
| APA | Yousefi, Fazilat.,Mills, Ryan D..,Sadeghian, Mahmoud.,Lentz, David R..,Wanhainen, Christina.,...&Miao, Laicheng.(2021).Geochemical and Nd-Sr Isotopic Compositions of Hypabyssal Adakites in the Torud-Ahmad Abad Magmatic Belt, Northern Central Iran Zone: Analysis of Petrogenesis and Geodynamic Implications.JOURNAL OF EARTH SCIENCE,17. |
| MLA | Yousefi, Fazilat,et al."Geochemical and Nd-Sr Isotopic Compositions of Hypabyssal Adakites in the Torud-Ahmad Abad Magmatic Belt, Northern Central Iran Zone: Analysis of Petrogenesis and Geodynamic Implications".JOURNAL OF EARTH SCIENCE (2021):17. |
入库方式： OAI收割
来源：地质与地球物理研究所
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