大兴安岭中段突泉盆地玛尼吐组火山岩地球化学特征及成因

陶楠; 宋维民; 杨佳林; 杜继宇; 庞雪娇

doi:10.13686/j.cnki.dzyzy.2016.06.002

大兴安岭中段突泉盆地玛尼吐组火山岩地球化学特征及成因

1.
吉林大学地球科学学院, 吉林长春 130061;

2.
中国地质调查局沈阳地质调查中心(沈阳地质矿产研究所), 辽宁沈阳 110034

详细信息

作者简介: 陶楠(1982-),男,工程硕士研究生,工程师,通信地址辽宁省沈阳市皇姑区黄河北大街280号,E-mail//52538310@qq.com

通讯作者: 宋维民(1983-),男,博士研究生,高级工程师,通信地址辽宁省沈阳市皇姑区黄河北大街280号,E-mail//swmws@126.com

中图分类号: P588.14;P595

收稿日期: 2016-10-10

修回日期: 2016-11-29

刊出日期: 2016-12-31

PETROGEOCHEMISTRY AND GENESIS OF THE VOLCANIC ROCKS OF MANITU FORMATION IN TUQUAN BASIN, MIDDLE DAXINGANLING MOUNTAINS

1.
College of Earth Sciences, Jilin University, Changchun 130061, China;

2.
Shenyang Institute of Geology and Mineral Resources, CGS, Shenyang 110034, China

More Information

Corresponding author: SONG Wei-min

Received Date: 10 October 2016

Revised Date: 29 November 2016

Publish Date: 31 December 2016

摘要

摘要: 突泉盆地玛尼吐组安山岩位于内蒙古东部兴安盟突泉县，大地构造位置属华北板块北缘晚古生代陆缘增生带，大兴安岭构造岩浆岩带中段.安山岩样品的SiO2、Al2O3、Na2O、K2O含量分别为60.64%~64.36%、15.84%~17.38%、3.76%~5.30%、2.44%~3.81%，为过铝质、高钾钙碱性岩石，轻稀土元素富集，重稀土元素亏损，无Eu异常和Ce异常，富集大离子亲石元素（Rb、K、Ba、LREE）和化学性质活泼的不相容元素（U、Th），相对亏损高场强元素（Nb、Ta、P、Ti）和重稀土元素（如Y、Yb、Lu）.原始岩浆来源于地壳岩石部分熔融源区，是蒙古-鄂霍次克洋闭合后岩石圈伸展环境下的产物.
- 岩石地球化学 /
- 岩石成因 /
- 玛尼吐组安山岩 /
- 突泉盆地 /
- 大兴安岭 /
- 内蒙古
Abstract: The andesite of Manitu Formation in the Tuquan Basin, Eastern Inner Mongolia, is tectonically located in the middle section of Daxinganling tectonomagmatic belt, in the Late Mesozoic continental marginal accretion zone on the northern margin of North China Plate. Study of petrogeochemistry indicates that the andesite is characterized by high silica (with SiO2 of 60.64%-64.36%) and alumina (Al2O3 15.84%-17.38%), and medium alkali (Na2O 3.76%-5.30%, K2O 2.44%-3.81%), belonging to peraluminous high potassium calc-alkali rock. The chondrite standard curve of rare earth elements reveals an enrichment of LREE and deficit of HREE, without Eu and Ce anomaly. The andesite is enriched in LILE (such as Rb, K, Ba and LREE), mobile incompatible elements (such as U and Th), relatively depleted in HFSE (such as Nb, Ta, P and Ti) and HREE. The primitive magma of the andesite is derived from the partial melting of the crust, as the result of the closure of Mongolia-Okhotsk Ocean in the extensional environment of the lithosphere.
- petrogeochemistry /
- petrogenesis /
- Manitu Formation /
- andesite /
- Tuquan basin /
- Daxinganling Mountains