新疆阿尔金地区长沙沟一带奥陶纪侵入岩及其演化特征
Evolution Characteristics of Ordovician Intrusive Rock in Changshagou of Altun Region
-
摘要: 新疆阿尔金地区长沙沟一带发育的侵入岩岩石类型包括辉石岩、辉长岩、辉绿辉长岩、石英闪长岩和石英二长闪长岩.野外地质特征和LA-ICP-MS锆石U-Pb测年结果显示就位时代均为奥陶纪.其中基性-超基性侵入岩具有幔源型特征;中-酸性侵入岩显示I型和地S型双重特征,其岩浆主要来源于上地幔,在岩浆上侵过程中同化混染了部分壳源物质,使其具有壳幔混合源的岩浆性质.基性-超基性侵入岩形成于超大陆裂解构造环境,系与大陆裂谷或深大断裂有关的深成岩浆作用的产物,中酸性侵入岩是汇聚阶段的产物.Abstract: The intrusive rocks in the Changshagou area of Altun of Xinjiang province include pyroxenite, gabbro, diabase gabbro, quartz diorite and quartz monzodiorite. Both field geological characteristics and LA-ICP-MS zircon U-Pb dating show that the rocks formed in Ordovician. Basic-ultrabasic intrusive rock has the characteristics of mantle source type; intermediate-acidic intrusive rocks show dual characteristics of type I and type S, with its magma coming mainly from the upper mantle. Assimilation by blending in part of the crust-source material in the process of magma invasion endows the rock with the nature of crust-mantle mixed source magma. Formed in continental cracking tectonic environment, the basic-ultrabasic intrusive rocks are the product of plutonic magmatism related to deep fault and continental rift, while the intermediate-acid intrusive rocks are resulted in convergence tectonic environment.
-
Key words:
- Altun /
- Ordovician /
- intrusive rocks /
- geochemistry
-
-
校培喜, 王永和, 张汉文,等. 阿尔金中段高压-超高压(含菱铁矿)石榴子石二辉橄榄岩的发现及其地质意义 [J]. 西北地质, 2001, 34(4): 67-74.
Xiao Peixi, Wang Yonghe, Zhang Hanwen, et al. The discovery of magnesite-bearing garnet lherzolite of hign-ultrahigh pressure belt and its geological significance in the middle section of Altgn Tagh [J]. Northwestern Geology, 2001, 34(4): 67-74.
于海峰, 陆松年, 刘永顺, 等. “阿尔金山岩群”的组成及其构造意义 [J]. 地质通报, 2002, 21(2): 834-840.
Yu Haifeng, Lu Songnian, Liu Yong shun, et al. Composingof the and Altgn Tagh Formation-complex and its tectonic signification [J]. Geological Bulletin of China, 2002, 21(2): 834-840.
董显扬, 李行, 叶良和, 等. 中国超镁铁质岩 [M]. 北京: 地质出版社, 1995.
Dong XY, Li H, Ye LH, et al. Ultramafic Rocks inChina [M]. Geological publishing house, Beijing, 1995.
柏道远, 贾宝华, 孟德保, 等. 且末县一级电站幅、银石山幅地质调查新成果及主要进展 [J]. 地质通报, 2004, 23(5/6): 564-569.
Bai Daoyuan, Jia Baohua, Meng Debao, et al. New results and major progress in regional geological survey of the Qiemo County First-Order Power Station and Yinshishan sheets [J]. Geological Bulletin of China, 2004, 23(5/6): 564-569.
李海兵, 杨经绥, 吴才来, 等. 阿尔金断裂剪切过程中定向生长锆石的发现及其意义 [J]. 地质通报, 2002, 21(6): 298-303.
Li Haibing, Yang Jingsui, Wu Cailai, et al. Discovery of oriented zircon growing in the shear process of the Altgn fault and its significance [J]. Geological Bulletin of China, 2002, 21(6): 298-303.
李江, 覃小锋, 陆济璞, 等. 瓦石峡幅、阿尔金山幅地质调查新成果及主要进展 [J]. 地质通报, 2004, 23(5/6): 579-584.
Li Jiang, Qin Xiaofeng, Lu Jipu, et al. New results and major progress in regional geological survey of the Washixie and Altgn Tagh sheets [J]. Geological Bulletin of China, 2004, 23(5/6): 579-584.
刘良, 车自成, 王焰, 等. 阿尔金高压变质岩带的特征及其构造意义 [J]. 岩石学报, 1999, 15(1): 57-63.
Liu liang, Che Zicheng, Wang Yan, et al. The petrological characters and geotectonic setting of high-pressure metamorphic rock belts in Altgn Mountains [J]. Acta Petrologica Sinica, 1999, 15(1): 57-63.
罗照华, 柯珊, 曹永清, 等. 东昆仑印支晚期幔源岩浆活动 [J]. 地质通报, 2002, 21(6): 292-297.
Luo Zhaohua, Ke Shan, Cao Yongqing, et al. Late Indosinian mantle-derived magmatism in the East Kunlun [J]. Geological Bulletin of China, 2002, 21(6): 292-297.
陈能松, 何蕾, 孙敏, 等. 东昆仑造山带早古生代变质峰期和逆冲构造变形年代的精确限定 [J]. 科学通报, 2002, 47(8): 628-631.
Chen Nengsong, He Lei, Sun Min, et al. Precise timing of the Early Paleozoic metamorphism and thrust deformation in the eastern Kunlun orogen [J]. Chinese Science Bulletin, 2002, 47(8): 628-631.
殷鸿福, 张克信, 王国灿, 等. 非威尔逊旋回与非史密斯方法——中国造山带研究理论与方法 [J]. 中国区域地质, 1998(增刊): 1-9.
Yin H F, Zhang K X, Wang G C, et al. Non-Wilson cycle and non-Smith method theory: method in studying China orogenic belts [J]. Regional Geology of China, 1998(Suppl): 1-9.
徐克勤, 孙鼐,王德滋,等. 华南花岗岩成因与成矿[A]. 花岗岩地质与成矿关系[C].南京:江苏科学技术出版社,1984.
Chappell B W, White A J R. Two contracting granite types[J]. Pacific Geol, 1974, 8: 173-174.
Irvine T N, Barager W R A. A guide to the chemical classification of the common volcanic rocks[J]. Canadian Journal of Earth Sciences, 1971, 8: 523-548.
Streckeisen A, et al. A chemical approximation to the modal QAPF' classification of the igneous rocks, N. Jb[J]. Miner. Abh., 1979, 136: 169-206.
Wood. D. A., A variably veined suboceanic upper mantle genetic significance for mid-ocean ridge basalts from geochemical evidence[J]. Geologu, 1979, 7: 499-503.
Coryell C D, et al. A procedure for geochemical interpretation of terrestrial rare-earth abundance patterns, J.[J]. Geophys. Res., 1963, 68: 559-566.
-
计量
- 文章访问数: 2614
- PDF下载数: 2118
- 施引文献: 0
下载: