Geochemical and Nd-Sr-Pb isotopic composition of Mesozoic volcanic rocks in the Songliao basin, NE China
文献类型：期刊论文
| 作者 | Wang, PJ; Chen, FK; Chen, SM; Siebel, W; Satir, M |
| 刊名 | GEOCHEMICAL JOURNAL
 |
| 出版日期 | 2006 |
| 卷号 | 40期号:2页码:149-159 |
| 关键词 | geochemistry Nd-Sr-Pb isotopes mesozoic volcanic rock Songliao basin |
| ISSN号 | 0016-7002 |
| 文献子类 | Article |
| 英文摘要 | Mesozoic volcanic rocks exposed in the Songliao basin form a major part of the basin fill and are the important petroleum reservoir rocks. Petrogenesis of these volcanic rocks and their tectonic setting, however, are poorly understood due to lack of sufficient chemical and isotopic data. These volcanic rocks cover a wide compositional spectrum ranging from basaltic trachyandesite to high-silica rhyolite. They can be divided into two formations, the upper Jurassic Huoshiling formation (157-146 Ma) with dominant dark gray andesite and the lower Cretaceous Yingeheng formation (136-113 Ma) with dominant yellowish rhyolite. Compositionally, these rocks are peraluminous to metaluminous, high-K to medium-K, calc-alkaline. They are enriched in large-ion lithophile and light rare earth elements, depleted in high field strength and heavy rare earth elements, and commonly display negative anomalies of Nb, Ti and P. Initial Sr-87/Sr-86 ratios and initial epsilon(Nd)-values of these volcanic rocks range from 0.7034 to 0.7106 and from -3.4 to 5.3, respectively, and their 6180 values vary from 3.2 parts per thousand to 14.8 parts per thousand. Initial Pb-206/Pb-204 and Pb-207/Pb-204 ratios have ranges of 17.65 to 18.22 and 15.52 to 15.57, respectively. The characteristic in Nd and Sr isotopic composition probably indicates a mixing of enriched MORB-like material and crustal component. Primary magmas for both the Jurassic and Cretaceous volcanic rocks could be derived from metasomatized enriched MORB-like sources, but the Cretaceous rhyolites commonly show crustal assimilation indicated by high initial Sr-87/Sr-86 ratios and low initial epsilon(Nd) values. Whether the volcanic rocks in the Songliao basin formed related either to the post-collisional setting of the Mongolia-Okhotsk suture or the subduction of the western Pacific plate remains to be discussed. |
| WOS关键词 | CONSTRAINTS ; PETROGENESIS ; STRONTIUM ; BENEATH ; LEAD ; ARC |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000236101300003 |
| 出版者 | GEOCHEMICAL SOC JAPAN |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/67124]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Chen, FK |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Lab Radiogen Isotope Geochem, Beijing 100029, Peoples R China 2.Jilin Univ, Earth Sci Coll, Changchun 130061, Peoples R China 3.Daqing Inst Explorat & Dev, Daqing 163712, Peoples R China 4.Univ Tubingen, Inst Geowissensch, D-72074 Tubingen, Germany |
| 推荐引用方式 GB/T 7714 | Wang, PJ,Chen, FK,Chen, SM,et al. Geochemical and Nd-Sr-Pb isotopic composition of Mesozoic volcanic rocks in the Songliao basin, NE China[J]. GEOCHEMICAL JOURNAL,2006,40(2):149-159. |
| APA | Wang, PJ,Chen, FK,Chen, SM,Siebel, W,&Satir, M.(2006).Geochemical and Nd-Sr-Pb isotopic composition of Mesozoic volcanic rocks in the Songliao basin, NE China.GEOCHEMICAL JOURNAL,40(2),149-159. |
| MLA | Wang, PJ,et al."Geochemical and Nd-Sr-Pb isotopic composition of Mesozoic volcanic rocks in the Songliao basin, NE China".GEOCHEMICAL JOURNAL 40.2(2006):149-159. |
入库方式： OAI收割
来源：地质与地球物理研究所
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