Mantle-derived magmas underplating and its effect on the crust in the Emeishan large igneous province: Evidence from geochronological study and numerical simulation of Dalaobao granites.

被引：0

作者：

Cheng LiLu ^{[1
]}

Zeng Ling ^{[1
]}

Zhang Fan ^{[1
]}

Liu Ming ^{[1
,2
]}

Luo ZhaoHua ^{[1
]}

机构：

[1] China Univ Geosci, Sch Earth Sci & Resources, State Key Lab Geol Proc & Mineral Resources, Beijing 100083, Peoples R China

[2] CAPF, Gold Geol Team 5, Xian 710100, Peoples R China

来源：

ACTA PETROLOGICA SINICA | 2013年 / 29卷 / 10期

关键词：

Emeishan Large igneous province; Pan-Xi area; Hongge granites; Age of magmatic intrusion; ZIRCON U-PB; LAYERED INTRUSION; GEOCHEMISTRY; CONSTRAINTS; PETROGENESIS; BASALTS; DIFFERENTIATION; PICRITES; ORIGIN;

D O I：

暂无

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The Hongge Dalaobao granitic stock in the Emeishan large igneous province, SW China, shows spatical association with the giant Fe-Ti-V deposit-bearing mafic-lutramafic intrusion. This granitic intrusion is composed of medium- to fine-grained biotite monzonitic granite. In situ ziron LA-ICP-MS U-Pb age indicates that the age of monzogranite is 255. 1 +/- 3. 6Ma, which is consistent with the ages (255. 2 +/- 3. 6Ma) by zircon U-Pb of peraluminous granites from Ailanghe. The ages show Dalaobao granites are related to the upwelling of the Emeishan plume. The age is 4Myr younger than the main stage ( similar to 260Ma) of the Emeishan volcanism. Based on the deep crustal hot zones, the results of numerical simulation show that the partial melting of deep crust and the Dalaobao granites magmatism are triggered by conductive heating of the mantle-driven magma.

引用

页码：3533 / 3539

页数：7

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