银根-额济纳旗盆地苏红图坳陷早白垩世火山岩地球化学特征与成因
Geochemistry Characteristics and Origin of Early Cretaceous Volcanic Rocks in Suhongtu Depression, Inner Mongolia, China
查看参考文献37篇
|
文摘
|
银根-额济纳旗盆地苏红图坳陷早白垩世火山活动强烈。火山岩的~(40)Ar/~(39)Ar年龄值为106.48±1.32~113.12±1.38 Ma;里特曼指数、K_2O和K_2O+Na_2O与SiO_2的关系表明该区火山岩为钾质碱性玄武岩;微量元素Nb、Ta富集的特点显示出苏红图火山岩具有洋岛玄武岩(OIB)特征,说明其源区可能主要是对流的软流圈地幔。火山岩的~(87)Sr/~(86)Sr和~(143)Nd/~(144)Nd比值分别变化在0.705477~0.707098及0.512318~0.512480之间,其Nd、Sr同位素组成靠近第一类富集地幔(EMI)端元,并有向EMⅡ延伸的趋势,显示本区火山岩的源区很大程度上受EMI的影响,并受EMII的微弱影响。此外,随着ε_(Nd)的减少,P_2O_5、Rb、Sr、Ba及Zr逐渐富集,暗示苏红图火山岩没有经历明显的地壳物质混染。所以,苏红图火山岩是来自对流软流圈地幔的熔融产物。岩浆在快速上升过程中受到了EMI型地幔的混染,但是没有受到明显的地壳物质混染,经分离结晶形成苏红图钾质碱性玄武岩。 |
|
其他语种文摘
|
In the Early Cretaceous the volcanic activity was strong in the depression of Suhongtu in Inggen-Ejin Qi basin. The ~(40)Ar/~(39)Ar age was 106.48±1.32~113.12±1.38 Ma of the volcanic rocks through analysis test of the field samples. We analyzed the volcanic rocks’ experimental data oxides, trace, REE and isotopic. Content of silica is 47.58%~56.28%, and the volcanic rocks are belong to potassic alkali basalt with Rittmann index value. Trace elements Ba, Nb, Ta, La and other large ion lithophile elements (LILE) and LREE are concentrated, with HREE losses and minor Sr loss. Under the conditions of MgO content is more than 4% incompatible elements Rb, Sr, Y, Zr, Nb, Ba, etc. With the abundance of a decrease in MgO content increased, while the compatible elements Sc, Ni, Co, Cr has a positive correlation with MgO, indicate that the early evolution of magma through a certain amount of olivine or clinopyroxene crystallization resulted in the separation of rising melt process or a high magma chamber has undergone a certain amount of mineral crystallization differentiation. The isotope ~(87)Sr/~(86)Sr and ~(143)Nd/~(144)Nd ratios are changed in 0.705477~0.707098 and 0.512318~0.512480. In the Nd, Sr correlation diagram, the volcanic rocks of the Nd, Sr isotopic compositions close to the first category enriched mantle (EMI) end-member, and has the trend of extended to EM Ⅱ shows the source region of volcanic rocks in this area mainly affected by EMI control, and the impact of the weak by the EMII, in addition, with the ε_(Nd) reduction, P_2O_5, Rb, Sr, Ba, and Zr gradual accumulation, suggest that the volcanic rocks have not experienced significant crustal contamination of the material. In this period, the research area lithosphere was thinning period, with the lithospheric mantle thinning, account for the formation of pre-enrichment mantle asthenosphere upwelling quickly, in the upwelling process, the crustal material mixed dye rarely occurring, resulting in some decompression melting occurs. So the volcanic rocks in this area are the products of lithospheric thinning during early Cretaceous. |
|
来源
|
矿物学报
,2014,34(1):107-116 【核心库】
|
|
关键词
|
银根-额济纳旗盆地
;
苏红图坳陷
;
早白垩世
;
玄武岩
|
|
地址
|
1.
河南理工大学安全科学与工程学院瓦斯地质研究所, 河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地, 河南, 焦作, 454003
2.
中国科学院广州地球化学研究所, 广东, 广州, 510640
3.
中国石油化工股份有限公司石油勘探开发研究院, 北京, 100083
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
1000-4734 |
|
学科
|
地质学 |
|
基金
|
国家重大科技专项
;
中国西北地区构造-岩相古地理研究与编图
;
河南理工大学博士基金
|
|
文献收藏号
|
CSCD:5081350
|
参考文献 共
37
共2页
|
|
1.
卫平生.
银根-额济纳旗盆地油气地质特征及勘探前景,2006:37-42
|
被引
3
次
|
|
|
|
|
2.
郭彦如.
查干断陷湖盆层序地层框架中的含油气系统研究,2003
|
被引
3
次
|
|
|
|
|
3.
陶国强.
查干德勒苏凹陷构造特征与油气成藏条件研究,2003
|
被引
2
次
|
|
|
|
|
4.
吴少波. 银根盆地苏红图火山岩特征及其与油气的关系.
西安石油学院学报,1998,13(6):8-11
|
被引
10
次
|
|
|
|
|
5.
吴少波. 银根盆地早白垩世火山岩特征及形成的大地构造环境.
矿物岩石,1999,19(1):24-28
|
被引
13
次
|
|
|
|
|
6.
张爱平.
内蒙古银额盆地查干凹陷构造特征及其与油气关系,2003
|
被引
2
次
|
|
|
|
|
7.
钟福平. 银根—额济纳旗盆地苏红图坳陷早白垩世火山岩对阿尔金断裂研究的科学意义.
地学前缘,2011,18(3):233-240
|
被引
17
次
|
|
|
|
|
8.
钟福平. 银根-额济纳旗盆地苏红图坳陷早白垩世火山岩幔源特征.
地质学报,2011,85(12):2003-2013
|
被引
6
次
|
|
|
|
|
9.
陈建平. 银根—额济纳旗盆地原油的发现及其主要地球化学特征.
地球化学,2001,30(4):335-342
|
被引
10
次
|
|
|
|
|
10.
常丽华.
火成岩鉴定手册,2009:2-6
|
被引
2
次
|
|
|
|
|
11.
陈小雨. 望天鹅火山岩石地球化学特征及其成因.
岩石学报,2008,24(11):2576-2584
|
被引
1
次
|
|
|
|
|
12.
Hofmann A W. Chemical differentiation of the Earth: The relationship between mantle, continental crust and oceanic crust.
Earth Planet Sci Lett,1988,90:297-314
|
被引
494
次
|
|
|
|
|
13.
Taylor S R.
The Continental Crust: Its Composition and Evolution,1985
|
被引
424
次
|
|
|
|
|
14.
Rollison H R.
岩石地球化学,2000:112-118
|
被引
1
次
|
|
|
|
|
15.
鄢全树. 南海新生代碱性玄武岩主量、微量元素及Sr-Nd-Pb同位素研究.
中国科学（D）辑,2008,38(1):56-71
|
被引
31
次
|
|
|
|
|
16.
Zindler A. Chemical Geodynamics.
Ann Rev Earth and Planetary Science Letters,1986,14:493-571
|
被引
730
次
|
|
|
|
|
17.
Cliff R A. Geochemistry of Inaccessible Island volcanic.
Chem Geol,1991,92:251-260
|
被引
11
次
|
|
|
|
|
18.
Tu Kan. Sr, Nd, and Pb isotopic compositions of Hainan Basalts(south China): Implications for a subcontinental lithosphere Dupal soruce.
Geology,1991,19:567-569
|
被引
55
次
|
|
|
|
|
19.
Mcculluoch M T. Nd and Sr isotopes in kimberlites and lamproites from Western Australia: an enriched mantle origin.
Nature,1984,310:198-202
|
被引
7
次
|
|
|
|
|
20.
Hoernle K. Sr-Nd-Pb isotopic evolution of Gran Canaria: Evidence for shallow enriched mantle beneath the Canary Islands.
Earth Planet Sci Lett,1991,106:44-56
|
被引
11
次
|
|
|
|
|
了解气象卫星更多信息，请访问