新疆尼勒克县布谷拉超钾质岩浆岩的40Ar-39Ar年龄和地球化学特征

被引：6

作者：

杨武斌 ^{[1
,2
]}

牛贺才 ^{[1
]}

罗勇 ^{[1
,2
]}

单强 ^{[1
]}

周昌平 ^{[3
]}

廖思平 ^{[4
]}

于学元 ^{[1
]}

机构：

[1] 中国科学院广州地球化学研究所

[2] 中国科学院研究生院

[3] 新疆维吾尔自治区地质矿产勘查开发局第七地质大队

[4] 江西省地质调查研究院

来源：

岩石学报 | 2010年 / 26卷 / 10期

关键词：

布谷拉; 超钾质岩浆岩; 40Ar-39Ar定年; 构造环境;

D O I：

暂无

中图分类号：

P588.125 [];

学科分类号：

070901 ;

摘要：

本文在西天山尼勒克县布谷拉地区厘定出了具有构造指示意义的超钾质岩浆岩,它侵位在石炭纪大哈拉军山组地层中,出露面积约为0.02km2,在空间上该类岩石与铜的矿化异常带或矿化带紧密共生。布谷拉超钾质岩浆岩具有典型的斑状结构,斑晶以钾长石、橄榄石、辉石为主,偶见白榴石残留体或假象。造岩矿物及岩石化学组成特征显示,布谷拉超钾质岩浆岩为斜长白榴岩类超钾质岩浆岩。布谷拉超钾质岩浆岩微量元素蛛网图表现为Nb-Ta、Zr-Hf、Ti的负异常和Pb的正异常,暗示该超钾质岩浆岩形成于造山阶段。微量元素地球化学特征显示,布谷拉超钾质岩浆岩是含金云母的石榴石尖晶石二辉橄榄岩部分熔融的产物,其形成深度介于70～80km狭窄的范围内。布谷拉超钾质岩浆岩的40Ar-39Ar有效坪年龄为274.2±1.6Ma,等时线年龄为274.3±4.4Ma,表明该类岩石形成于早二叠世。布谷拉超钾质岩浆岩的地球化学特征及40Ar-39Ar定年研究结果显示,在早二叠世至少阿吾拉勒山的东段仍处于造山演化阶段。

引用

页码：3065 / 3073

页数：9

共 29 条

[11]

Potassic and ultrapotassic magmatism in the circum-Tyrrhenian region: Significance of carbonated pelitic vs. pelitic sediment recycling at destructive plate margins[J] . Riccardo Avanzinelli,Michele Lustrino,Massimo Mattei,Leone Melluso,Sandro Conticelli.LITHOS . 2009 (1)

[12]

Isotopic and geochemical evidence for a heterogeneous mantle plume origin of the Virunga volcanics, Western rift, East African Rift system[J] . Ramananda Chakrabarti,Asish R. Basu,Alba P. Santo,Dario Tedesco,Orlando Vaselli.Chemical Geology . 2009 (3)

[13]

Isotope geochemistry （Sr–Nd–Pb） and petrogenesis of leucite-bearing volcanic rocks from “Colli Albani” volcano, Roman Magmatic Province, Central Italy: inferences on volcano evolution and magma genesis[J] . Elena Boari,Riccardo Avanzinelli,Leone Melluso,Guido Giordano,Massimo Mattei,Arnaldo A. Benedetti,Vincenzo Morra,Sandro Conticelli.Bulletin of Volcanology . 2009 (9)

[14]

K-richterite-olivine-phlogopite-diopside-sanidine lamproites from the Afyon volcanic province, Turkey[J] . AKAL,CüNEYT.Geological Magazine . 2008 (4)

[15]

Geochemical and Sr–Nd–Pb isotopic characteristics of Paleocene plagioleucitites from the Eastern Pontides （NE Turkey）[J] . LITHOS . 2008 (1)

[16]

Drying and dying of a subducted slab: Coupled Li and B isotope variations in Western Anatolia Cenozoic Volcanism[J] . Samuele Agostini,Jeffrey G. Ryan,Sonia Tonarini,Fabrizio Innocenti.Earth and Planetary Science Letters . 2008 (1)

[17]

Sphalerite 40 Ar/ 39 Ar progressive crushing and stepwise heating techniques[J] . Hua-Ning Qiu,Ying-De Jiang.Earth and Planetary Science Letters . 2007 (1)

[18]

Accretion of arc-oceanic lithospheric mantle in the Mediterranean: Evidence from extremely high-Mg olivines and Cr-rich spinel inclusions in lamproites[J] . Earth and Planetary Science Letters . 2007 (1)

[19]

Mineral phase compositions in silica-undersaturated ‘leucite’ lamproites from the Bucak area, Isparta, SW Turkey[J] . LITHOS . 2006 (3)

[20]

The Western Mediterranean lamproitic magmatism: origin and geodynamic significance[J] . AngeloPeccerillo,GiorgioMartinotti.Terra Nova . 2006 (2)

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