LA-MC-ICP MS zircon U-Pb geochronology and petrological geochemistry of scientific deep drilling in Zhuanqiao, Lujiang-Zongyang volcanic basin

被引：0

作者：

Jia LiQiong ^{[1
,2
,3
]}

Xu WenYi ^{[3
]}

Lu QingTian ^{[3
]}

Mo XuanXue ^{[1
,2
]}

Xiong Xin ^{[3
]}

Li Jun ^{[1
,3
]}

Wang Liang ^{[1
,4
]}

机构：

[1] China Univ Geosci, Sch Earth Sci & Resources, Beijing 100083, Peoples R China

[2] China Univ Geosci, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China

[3] Chinese Acad Geol Sci, MLR, Inst Mineral Resources, Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China

[4] Chinese Armed Police Force, Gold Geol Inst, Langfang 065000, Peoples R China

来源：

ACTA PETROLOGICA SINICA | 2014年 / 30卷 / 04期

关键词：

SinoProbe; Science deep drilling; Shoshonite series; Zhuanqiao; Lujiang-Zongyang volcanic basin; LUZONG BASIN; YANGTZE-RIVER; BAJIATAN INTRUSION; EASTERN CHINA; LOWER REACHES; ROCKS; ANHUI; BELT; CONSTRAINTS; PROVINCE;

D O I：

暂无

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

LA-MC-ICP MS zircon U-Pb datings yield the ages of 131.29 +/- 0.85Ma, 130.95 +/- 0. 56Ma, 130. 88 +/- 0. 41Ma for trachyandesite, syenite and biotite monzonite from scientific deep drilling ZK01 in Zhuanqiao, Lujiang-Zongyang volcanic basin. Major and trace elements suggest, belonging to metaluminous-peraluminous series, these igneous rocks in ZK01 are characterized by high content of potassium (K2O averaged at 3. 7%), rich alkali (K2O + Na2O averaged at 8.4%) and LREEs but depleted strong incompatible elements. Most samples plot in the field of shoshonite in SiO2-K2O diagram, indicating the volcanic and intrusive rocks are shoshonite series. Mineral fractional crystallization occured during the evolution of magma. epsilon(Hf)(t) values of trachyandesite, syenite and biotite monzonite are -12.9 similar to -7.6, -10.1 similar to -6.5 and -11.1 similar to -3.4, respectively. It has been inferred that igneous rocks in ZK01 derived from enriched mantle produced by fluid metasomatism of subduction slab, less contaminated by continental material, and magma formed in the tectonic setting of lithosphere tension.

引用

页码：995 / 1016

页数：22

共 78 条

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