大别山北淮阳构造带柳林辉长岩:新元古代晚期裂解事件的记录

陈玲; 马昌前; 佘振兵; 张金阳; 周红升; 王琳燕

大别山北淮阳构造带柳林辉长岩:新元古代晚期裂解事件的记录

陈玲¹,
马昌前^{1, 2, ,},
佘振兵¹,
张金阳¹,
周红升³,
王琳燕¹

1.
中国地质大学地球科学学院，湖北武汉 430074
2.
中国地质大学地质过程与矿产资源国家重点实验室，湖北武汉 430074
3.
信阳师范学院城市与环境科学系，河南信阳 464000

基金项目:

国家自然科学基金重点项目 40334037

详细信息

作者简介:
陈玲(1982一)，女，矿物学岩石学专业硕士研究生

通讯作者:
马昌前, Email: cqma@cug.edu.cn

中图分类号: P588.12
计量
- 文章访问数: 3924
- HTML全文浏览量: 453
- PDF下载量: 17
- 被引次数: 0
出版历程
- 收稿日期: 2005-12-26
- 刊出日期: 2006-07-25

Liulin Gabbro in the Beihuaiyang Tectonic Belt of the Dabie Orogen: A Witness of the Late Neoproterozoic Rifting Event

1.
Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074, China
2.
State Key Laboratory of Geological Processes and Mineral Resources, China Urtiversity of Geosciences, Wuhan 430074, China
3.
Department of City and Environmental Science, Xinyang Normal University, Xinyang 464000, China

摘要

摘要: 大别山北坡北淮阳构造带的柳林-定远-王母观一线, 断续分布着带状产出的辉长岩体, 构成一条NWW向的基性岩带, 以往被认为是形成于海西期的造山后伸展环境.对该带西缘鸡公山北坡柳林辉长岩进行了锆石SHRIMPU-Pb定年和辉石、斜长石的矿物化学研究.辉长岩中的岩浆锆石SHRIMPU-Pb年龄为(611±13) Ma, 代表岩体结晶时代, 这一年龄远远老于其围岩上奥陶统定远组的时代.岩体主要矿物辉石属普通辉石, Na₂O、FeO和MnO较高, 长石属中长石, 低CaO, 这些特征明显区别于岛弧或活动大陆边缘环境中的同类矿物, 而与板内伸展环境中形成的辉长岩的矿物特征相似.研究表明, 大别山北部新元古代晚期(610Ma左右) 发育了一次陆内裂解事件.
- 辉长岩 /
- 锆石SHRIMPU-Pb定年 /
- 新元古代裂解事件 /
- 大别造山带
Abstract: A number of gabbric plutons discontinuously crop out along the Liulin-Dingyuan-Wangmuguan region in the Beihuaiyang tectonic belt of north Dabie. They were previously considered to have been developed in a post-orogenic extensional setting. In this paper we present new data of zircon SHRIMP dating and EPMA chemical analysis results of pyroxenes and plagioclases from the Liulin gabbro at the northern foot of Jigongshan Mountain. SHRIMP U-Pb dating on magmatic zircons yielded an age of (611±13) Ma, which is interpreted as the crystallization time of the Liulin gabbro. The date is significantly older than the immediately adjacent Upper Ordovician Dingyuan Formation, revising the contact relationship between the gabbro body and its wall rock. Pyroxene is exclusively augite with high Na₂O, FeO and MnO contents, and plagioclase is low CaO andesine, which share characteristics with their counterparts from gabbros formed in an intra-plate setting and are largely different from those from gabbros associated with island arc or active continental margin. The results indicate that there may have been a continental rifting event in the north of the Dabie orogen during the late Neoproterozoic period.
- gabbro /
- zircon SHRIMP U-Pb dating /
- Neoproterozoic rifting event /
- Dabie orogen

HTML全文

图 1 大别山北淮阳构造带基性侵入岩分布地质简图

Pzn.古生代南湾组; Pzd.古生代定远组; Pzh.古生代浒湾组; γ5³.燕山期花岗岩; K.白垩系; Q.第四系

Fig. 1. Geological sketch map of mafic intrusive rocks in the Beihuaiyang tectonic belt, Dabie orogen

下载: 全尺寸图片幻灯片

图 2 柳林辉长岩体中辉石的Q-J (a) 和Wo-En-Fs (b) 图解

Quad-Ca-Mg-Fe辉石类; Ca-Na-Ca-Na辉石类; Na-Na辉石类

Fig. 2. Q-J (a) and Wo-En-Fs (b) diagrams for the pyroxenes from Liulin gabbro

下载: 全尺寸图片幻灯片

图 3 柳林辉长岩(04-167-2) 锆石SHRIMP U-Pb年龄谐和图

Fig. 3. Zircon SHRIMP U-Pb concordia diagram for Liulin gabbro (04-167-2)

下载: 全尺寸图片幻灯片

图 4 柳林辉长岩单斜辉石SiO₂-Al₂O₃和SiO₂-TiO₂图解

a.单斜辉石SiO₂-Al₂O₃图解(Le Bas, 1962); b.单斜辉石SiO₂-TiO₂图解(Nisbet and Pearce, 1977; 倪志耀, 1994); S.亚碱性岩; A.碱性岩; P.过碱性岩; OFB.洋底玄武岩; VAB.火山弧玄武岩

Fig. 4. SiO₂ versus Al₂O₃ and SiO₂ versus TiO₂ diagrams of clinopyroxenes from Liulin gabbro

下载: 全尺寸图片幻灯片

图 5 柳林辉长岩单斜辉石F1-F2图解(Nisbet and Pearce, 1977)

WPT.板块内部拉斑玄武岩; WPA.板块内部碱性玄武岩; VAB.火山弧玄武岩; OFB.洋底玄武岩

Fig. 5. F1 versus F2 diagram of clinopyroxenes from Liulin gabbro

下载: 全尺寸图片幻灯片

表 1 柳林辉长岩辉石和斜长石电子探针化学成分

Table 1. EPMA chemical compositions of the pyroxenes and plagioclases from Liulin gabbro

表 2 柳林辉长岩锆石SHRIMP U-Pb定年结果

Table 2. Zircon SHRIMP U-Pb data of Liulin gabbro

参考文献(45)

Bai, Z. M., 2000. Mineral chemistry and genetic significance of clinopyroxenes from the Mesozoic volcanic rocks in Western Hills of Beijing. Acta Petrologica et Mineralogica, 19 (2): 174-184 (in Chinese with English abstract).
Dobrzinski, N., Bahlburg, H., Strauss, H., 2003. Geochemistry of Sinian tillites from Hunan Province, South China. Progress in Natural Science, 13 (11): 867-874. doi: 10.1080/10020070312331344570
Dong, Y. M., Guo, C. X., Wei, Y. N., 2002. Sinian event deposits in the eastern part of the Yangtze Gorge. Journal of Palaeogeography, 4 (2): 38-45 (in Chinese with English abstract).
Krawinkel, H., Wozazek, S., Krawinkel, J., etal., 1999. Heavy-mineral analysis and clinopyroxene geochemistry applied to provenance analysis of lithic sandstones from the Azuero-Sona complex (NW Panama). Sedimentary Geology, 124: 149-168. doi: 10.1016/S0037-0738(98)00125-0
Kuang, S. P., Zhang, B. R., 2002. Determination for two kinds of basic magmatisms in Sujiahe region of the northern Dabie orogenic belt, central China: Evidence from geochemistry. Geochimica, 31 (6): 557-563 (in Chinese with English abstract).
LeBas, M. J., 1962. The role of aluminium in igneous clinopyroxenes with relation to their parentage. American Journal of Science, 260, 267-288. doi: 10.2475/ajs.260.4.267
Li, S. G., Han, W. L., Huang, F., etal., 1998. Sm-Nd and Rb-Sr ages and geochemistry of volcanics from the Dingyuan Formation in Dabie mountains, central China: Evidence to the Paleozoic magmatic arc. Scientia Geological Sinica, 7 (4): 461-470.
Liu, X. C., Jahn, B. M., Liu, D. Y., etal., 2004. SHRIMP UPb zircon dating of a metagabbro and eclogites from western Dabieshan (Hongan block), China, and its tectonic implications. Tectonophysics, 394: 171-192. doi: 10.1016/j.tecto.2004.08.004
Ma, C. Q., She, Z. B., Xu, P., etal., 2005. Silurian A-type granitoids in the southern margin of the Tongbai-Dabieshan: Evidence from SHRIMP zircon geochronology and geochemistry. Science in China(Series D), 48 (8): 1134-1145.
Morimoto, N., 1988. Nomenclature of pyroxenes. Mineralogical Magazine, 52: 535-550. doi: 10.1180/minmag.1988.052.367.15
Nisbet, E. G., Pearce, J. A., 1977. Clinopyroxenes composition in mafic lavas from different tectonic settings. Contributions to Mineralogy and Petrology, 63 (2): 149-160. doi: 10.1007/BF00398776
Ni, Z. Y., 1994. Chemical composition of pyroxenes from the Huangshandong mafic-ultramafic complex in Hami, Xinjiang. Acta Petrologica et Mineralogica, 13 (1): 55-56 (in Chinese with English abstract).
Song, B., Zhang, Y. H., Wan, Y. S., etal., 2002. Mount malcing and procedure of the SHRIMP dating. Geological Review, 48 (Suppl. ): 26-30 (in Chinese with English abstract).
Sun, C. M., 1994. Genetic mineralogy of pyroxenes from the Yanbian Proterozoic ophiolites (Sichuan, China), and its geotectonic implications. Journal of Mineralogy and Petrology, 14 (3): 1-15 (in Chinese with English abstract).
Wan, Y. S., Liu, D. Y., Jian, P., 2004. Comparison between monazite dating and zircon dating. Chinese Science Bulletin, 49 (12): 1185-1190 (in Chinese). doi: 10.1360/csb2004-49-12-1185
Wang, F., Wang, C. Y., Zhang, D. N., 1999. Numeric simulation of the tectonic evolution in Dabie orogenic belt. Acta Seismologica Sinica, 21 (5): 478-486.
Wang, S. F., Huang, S. Y., Xu, B., etal., 2002. Geochemical characteristic and tectonic setting of the Nanwan Formation in Xinyang district, Henan Province. Geoscience, 16 (3): 243-248 (in Chinese with English abstract).
Williams, I. S., 1998. U-Th-Pb geochronology by ion microprobe. In: McKibben, M. A., Shanks, W. C., Ridley, W. I., eds., Applications of microanalytical techniques tounderstanding mineralizing processes. Reviews in Economic Geology, 7: 1-35.
Wu, Y. B., Zheng, Y. F., Gong, B., etal., 2005. Zircon U-Pb ages and oxygen isotope compositions for granite at Xinkailing in the Beihuaiyang zone and their significance. Earth Science—Journal of China University of Geosciences, 30 (6): 659-672 (in Chinese with English abstract).
Xie, Z., Chen, J. F., Zhang, X., etal., 2002. Geochronology of Neoproterozoic mafic intrusions in north Huaiyangarea. Acta Geoscientia Sinica, 23 (6): 517-520 (in Chinese with English abstract).
Ye, B. D., Jian, P., Xu, W. J., etal., 1993. The Sujiahe terrene collage belt and its constitution and evolution along the north hillslope of the TongbaiDabie orogenic belt. China University of Geosciences Press, Wuhan, 1-4, 52-54 (in Chinese).
Zhang, Q., Ma, W. P., Jin, W. J., etal., 1995. Geochemistry and tectonic significance of post-tectonic gabbro from Wangmuguan of Xinxian County, Henan Province. Geochimica, 24 (4): 341-350 (in Chinese with English abstract).
Zhang, R. J., Chen, X. H., 1998. The discovery of Early Ordovician microfossils from the Sujiahe Group of Tongbai-Dabie orogenic belt and its significances. Acta Micropalaeontologica Sinica, 15 (2): 125-133.
Zhang, S. H., Jiang, G. Q., Zhang, J. M., etal., 2005. U-Pb sensitive high-resolution ion microprobe ages from the Doushantuo Formation in South China: Constraints on Late Neoproterozoic glaciations. Geology, 33: 473-476.
Zhang, W. Z., Li, H. K., Wang, G. F., etal., 2001. Palaeomagnetic study of Neoproterozoic glaciation, eastern China and implication of geology. Progress in Precambrian Research, 24 (1): 35-57 (in Chinese with English abstract).
Zheng, Y. F., Wu, Y. B., Zhao, Z. F., etal., 2004. Discovery of the low¹⁸O Neoproterozoic magmatic rocks in the north of Dabie mountains. Chinese Science Bulletin, 49 (14): 1468-1470 (inChinese). doi: 10.1360/csb2004-49-14-1468
Zhou, C. Y., Ge, W. C., Wu, F. Y., etal., 2005. Petrological characteristics and tectonic implications of the Tahe gabbro in the northern part of the Great Xing'an range. Journal of Jilin University (Earth Science Edition), 35 (2): 143-149 (in Chinese with Englis habstract).
Zhou, X. M., Xu, X. S., Dong, W. C., etal., 1994. The mineral feature of the active continental margin in the southeast of China: Anorthitic plagioclase. Chinese Science Bulletin, 39 (11): 1011-1014 (in Chinese). doi: 10.1360/csb1994-39-11-1011
白志民, 2000. 北京西山中生代火山岩中单斜辉石矿物化学及成因意义. 岩石矿物学杂志, 19 (2): 174-184. doi: 10.3969/j.issn.1000-6524.2000.02.010
佟彦明, 郭成贤, 危宇宁, 2002. 长江三峡东部地区震旦纪事件沉积. 古地理学报, 4 (2): 38-45. doi: 10.3969/j.issn.1671-1505.2002.02.005
匡少平, 张本仁, 2002. 大别造山带北麓苏家河地区两种不同基性岩浆作用的识别. 地球化学, 31 (6): 557-563. doi: 10.3321/j.issn:0379-1726.2002.06.007
倪志耀, 1994. 黄山东镁铁超镁铁杂岩中的辉石化学成分研究. 岩石矿物学杂志, 13 (1): 55-66. https://www.cnki.com.cn/Article/CJFDTOTAL-YSKW401.006.htm
宋彪, 张玉海, 万渝生, 等, 2002. 锆石SHRIMP样品靶制作、年龄测定及有关现象讨论. 地质论评, 48 (增刊): 26-30. https://www.cnki.com.cn/Article/CJFDTOTAL-DZLP2002S1006.htm
孙传敏, 1994. 四川盐边元古代蛇绿岩中辉石的成因矿物学及其大地构造意义. 矿物岩石, 14 (3): 1-15. https://www.cnki.com.cn/Article/CJFDTOTAL-KWYS403.000.htm
万渝生, 刘敦一, 简平, 2004. 独居石和锆石SHRIMPU-Pb定年对比. 科学通报, 49 (12): 1185-1190. doi: 10.3321/j.issn:0023-074X.2004.12.013
王世锋, 黄少英, 徐备, 等, 2002. 河南信阳地区南湾组地球化学特征及其构造背景. 现代地质, 16 (3): 243-248. doi: 10.3969/j.issn.1000-8527.2002.03.004
吴元保, 郑永飞, 龚冰, 等, 2005. 北淮阳新开岭地区花岗岩锆石U-Pb年龄和氧同位素组成. 地球科学——中国地质大学学报, 30 (6): 659-672.
谢智, 陈江峰, 张巽, 等, 2002. 北淮阳新元古代基性侵入岩年代学初步研究. 地球学报, 23 (6): 517-520. doi: 10.3321/j.issn:1006-3021.2002.06.006
叶伯丹, 简平, 许文俊, 等, 1993. 桐柏-大别山造山带北坡苏家河地体拼接带及其构成和演化. 武汉: 中国地质大学出版社, 1-4, 52-54.
张旗, 马文璞, 金唯俊, 等, 1995. 一个造山后的辉长岩——河南新县王母观岩体的地球化学特征. 地球化学, 24 (4): 341-350. doi: 10.3321/j.issn:0379-1726.1995.04.004
张仁杰, 陈孝红, 1998. 桐柏-大别造山带苏家河群早奥陶世微体化石及其意义. 微体古生物学报, 15 (2): 125-133. https://www.cnki.com.cn/Article/CJFDTOTAL-WSGT802.001.htm
张文治, 李怀坤, 王官福, 等, 2001. 中国东部晚元古冰成岩的古地磁及地质意义. 前寒武纪研究进展, 24 (1): 35-57. doi: 10.3969/j.issn.1672-4135.2001.01.006
郑永飞, 吴元保, 赵子福, 等, 2004. 大别山北麓发现新元古代低¹⁸O岩浆岩. 科学通报, 49 (14): 1468-1470. doi: 10.1360/csb2004-49-14-1468
周长勇, 葛文春, 吴福元, 等, 2005. 大兴安岭北段塔河辉长岩的岩石学特征及其构造意义. 吉林大学学报(地球科学版), 35 (2): 143-149. https://www.cnki.com.cn/Article/CJFDTOTAL-CCDZ200502001.htm
周新民, 徐夕生, 董传万, 等, 1994. 中国东南活动大陆边缘的矿物标志: 钙长石质斜长石. 科学通报, 39 (11): 1011-1014. https://www.cnki.com.cn/Article/CJFDTOTAL-KXTB199411015.htm