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地质科学  2001, Vol. Issue (3): 304-318    DOI:
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囊谦盆地新生代钾质火山岩成因岩石学研究
邓万明1, 孙宏娟1, 张玉泉2
1. 中国科学院地质与地球物理研究所岩石圈构造演化开放研究实验室, 北京, 100029;
2. 中国科学院广州地球化学研究所, 广州, 510540
PETROGENESIS OF CENOZOIC POTASSIC VOLCANIC ROCKS IN NANGQEN BASIN
Deng Wanming1, Sun Hongjuan1, Zhang Yuquan2
1. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029;
2. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510540
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摘要 囊谦新生代钾质火山岩形成于碰撞后的板内构造环境,基性、中性和中酸性熔岩之间不存在分异和演化的关系,它们地球化学性质上的差异是源区部分熔融程度不同所致;钾质岩浆形成于50~80 km深处的富集交代地幔.横断山地区一些拉分盆地中火山岩源区的部分熔融可能与来自软流圈小而分散的上涌体的底侵有关.大型走滑断裂带的强烈活动为熔体的快速上升提供了通道.
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邓万明
孙宏娟
张玉泉
关键词钾质火山岩   囊谦盆地   剪切—走滑断裂带   富集地幔源   部分熔融     
Abstract: The Nangqen Basin is one of the Tertiary pull-apart basins situated at the east of the Qiangtang block. Similar to the adjacent Dingqing and Bashu Basins, there occurred a series of potassic volcanic and sub-volcanic rocks ranging from basic, intermediate to intermediate-acid. Based on a study of petrology, mineralogy and geochemistry including REE, trace elements, isotopic elements and chronology, we suggested that the Cenozoic potassic volcanic rocks in the Nangqen basin were formed in a post-collisional intra-plate tectonic setting. The geochemical variability of the basic, intermediate and intermediate acid rocks may be mainly attributable to the different partial melting degrees of the mantle sources formed at about 50~80 km depth, instead of a relation of magmatic differentiation or evolution. The sources of the potassic rocks are enriched metasomatic mantle that has experienced multiple mixture of components mainly derived from the crust. The partial melting of the sources of the volcanic rocks in some pull-apart basins in the Hengduan Mts. area may be related to the underplating of the small-scattered magma upwelling derived from the asthenosphere. The tectonic movements of the large-scale strike-slip faults provided the channel-ways for the melts ascending.
Key wordsThe potassic volcanic rocks   The Nangqen basin   Strike-slip faults   Enriched mantle   Partial melting   
收稿日期: 2000-03-30;
基金资助:中国科学院青藏重大基础研究项目(KZ951-A1-204-01-02)和国家重点基础研究发展规划项目(G1998040800)资助.
引用本文:   
邓万明,孙宏娟,张玉泉. 2001, 囊谦盆地新生代钾质火山岩成因岩石学研究. 地质科学, (3): 304-318.
Deng Wanming,Sun Hongjuan,Zhang Yuquan. PETROGENESIS OF CENOZOIC POTASSIC VOLCANIC ROCKS IN NANGQEN BASIN[J]. Chinese Journal of Geology, 2001, (3): 304-318.
 
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[1] 刘贻灿, 邓亮鹏, 古晓锋, Groppo C, Rolfo F. 北大别的多阶段高温变质作用与部分熔融及其地球动力学过程和大地构造意义[J]. 地质科学, 2014, 49(2): 355-367.
[2] 徐晓霞1 丁 林1 许 强1 蔡福龙2 张清海1 张利云1 来庆洲1. 藏东南超镁铁质岩墙及其地质意义[J]. 地质科学, 2009, 44(3): 1012-1024.
[3] 牛漫兰, 朱光, 刘国生, 宋传中, 王道轩. 郯庐断裂带中-南段新生代火山活动与深部过程[J]. 地质科学, 2005, (3): 390-403.
[4] 刘燊, 胡瑞忠, 赵军红, 冯彩霞, 蒋国豪, 史丹妮. 胶东北部碱性超基性脉岩地球化学特征及环境和成因探讨[J]. 地质科学, 2005, (1): 69-83.
[5] 桑祖南, 周永胜, 何昌荣, 金振民. 辉长岩部分熔融实验及地质学意义[J]. 地质科学, 2002, (4): 385-392.
[6] 王凯怡, 李继亮, 刘如琦. 阜平片麻岩之成因[J]. 地质科学, 1991, (3): 254-267.
[7] 邓万明. 藏北蛇绿岩中尖晶石类矿物的化学成分[J]. 地质科学, 1988, (2): 121-127.
 
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