Geochemistry and petrogenesis of anorogenic REE-bearing peralkaline granitoids from Northern Sudan
文献类型：期刊论文
| 作者 | Salih, Makki Omer1; Wan, Bo2; Lentz, David R.3 |
| 刊名 | NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN
 |
| 出版日期 | 2021-10-01 |
| 卷号 | 197期号:2页码:185-208 |
| 关键词 | A-type granite within-plate anorogenic ring dykes rare earth elements high field strength elements Keraf zone Arabian Nubian Shield Sudan |
| ISSN号 | 0077-7757 |
| DOI | 10.1127/njma/2021/0274 |
| 英文摘要 | In this study, we divide anorogenic granitoids of northern Sudan to two types: aegirine to augite-bearing granites and syenites, and amphibole-bearing granites, based on petrographic and geochemical criteria. These granitoids are A-type characterized by high SiO2, Na2O, K2O, and Fe2O3T, with low contents of CaO, MgO, TiO2, and P2O5. The aegirineto augite-bearing granites and syenites have a low Y/Nb ratio <= 1.2, which are interpreted as Al-type suites, whereas the amphibole-bearing granite suite have average Y/Nb >= 1.2 that indicates A2-type granite. The Al-type granitoids are also characterized by high values of Nb, Ta, Y, Zr, Hf, Th, U, and REE and Li, Rb, Zn, and Be, enriclunent of the I,REE content relative to HREE (La/Yb ratios range from 2.1 to 22), pronounced to minor negative Eu anomalies (Eu/Eu* = 0.16-0.46), and agpaitic index ranging from 1.03 to 1.42 and moderate to high contents of HFSEs. In addition, IIFSE mineralization recognized in the samples show high Fep, and TiO2, consistent with the presence of magnetite, titanite, and zircon, as well as higher concentration of HFSE. In contrast, the A2-type granitoids show weakly fractionated REE patterns (La/Yb ranges from 2.4 to 2.9), minor Eu negative anomalies (Eu/Eu* = 0.47-0.59), with agpatic index ranging from 0.95 to 1.08 and moderate contents of HFSEs. Both of the A1- and A2-type granitoids are supposed to emplace in a within-plate environment, suggestive of an extensional geodynarnic setting, possibly mantle plume related. Estimate of crystallization pressures indicates that the amphibole-bearing granites suite (near 10 MPa) were shallowly emplaced, whereas the aegirine- and /or augite-bearing granites and syenites suite forms in a deeper magma chamber (similar to 190 MPa). The exposure of the two magmatic suites are due to reactivation of the Keraf faults that intersect with Atmur suture zone. |
| WOS关键词 | A-TYPE GRANITES ; PRECAMBRIAN CRUSTAL EVOLUTION ; ARABIAN-NUBIAN SHIELD ; TECTONIC IMPLICATIONS ; BAYUDA DESERT ; ISOTOPE GEOCHEMISTRY ; BASEMENT-COMPLEX ; IGNEOUS COMPLEX ; EASTERN DESERT ; PLUTONIC ROCKS |
| 资助项目 | NSFC[91855207] ; CAS program[GJHZ 1776] |
| WOS研究方向 | Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:000704281100006 |
| 出版者 | E SCHWEIZERBARTSCHE VERLAGSBUCHHANDLUNG |
| 资助机构 | NSFC ; NSFC ; CAS program ; CAS program ; NSFC ; NSFC ; CAS program ; CAS program ; NSFC ; NSFC ; CAS program ; CAS program ; NSFC ; NSFC ; CAS program ; CAS program |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/102725]  |
| 专题 | 地质与地球物理研究所_岩石圈演化国家重点实验室 |
| 通讯作者 | Salih, Makki Omer |
| 作者单位 | 1.Geol Res Author Sudan, POB 410, Khartoum, Sudan 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 3.Univ New Brunswick, Dept Earth Sci, Fredericton, NB, Canada |
| 推荐引用方式 GB/T 7714 | Salih, Makki Omer,Wan, Bo,Lentz, David R.. Geochemistry and petrogenesis of anorogenic REE-bearing peralkaline granitoids from Northern Sudan[J]. NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN,2021,197(2):185-208. |
| APA | Salih, Makki Omer,Wan, Bo,&Lentz, David R..(2021).Geochemistry and petrogenesis of anorogenic REE-bearing peralkaline granitoids from Northern Sudan.NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN,197(2),185-208. |
| MLA | Salih, Makki Omer,et al."Geochemistry and petrogenesis of anorogenic REE-bearing peralkaline granitoids from Northern Sudan".NEUES JAHRBUCH FUR MINERALOGIE-ABHANDLUNGEN 197.2(2021):185-208. |
入库方式： OAI收割
来源：地质与地球物理研究所
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