皖东南黄片麻岩的锆石U—Pb年龄
U-Pb dating of zircon from gneiss at Nanhuang in East Anhui.
-
摘要: 在皖东嘉山南黄地区新元古代张八岭岩群之下,隐伏一套角闪岩相的TTG质片麻岩类。单颗锆石U-Pb法年龄测定得到其不一致线上交点年龄为2493±19Ma,代表了片麻岩原岩的形成年龄。这是扬子陆块北东缘首次发现的新太古代基底,证实扬子陆块北缘存在较广泛的新太古代—古元古代基底。
-
Key words:
- Northwestern margin of the Yangtze plate /
- TTG gneiss /
- Zircon U-Pb dating /
- Neoproterozoic /
-
-
[1] ［1］Krogh T. 1973. A low-contamination method for hydrothermal decomposition of zircon and extraction of U and Pb for isotopic age determinations. Geochim. Cosmochim. Acta, 37(3):485-494
[2] ［2］Krogh TE. 1978. Vapor transfer for the dissolution of zircons in a multi-sample capule at high-pressure. In: Short Papers of the 4th International Conference on Geochronology, Cosmochronology and Isotope Geology. USGS Open-File Report (78-701), 233-234
[3] ［3］Lu Songnian, Yang Chunliang, Jiang Mingmei and Li Huimin. 1996. Tracing the Evolution of Precambrian Continental Crust. Beijing: Geological Publishing House, 1-19 (in Chinese)
[4] ［4］Qiu YM, Gao S, Neal JM, David IG, Wenli L. 2000. First evidence of ＞3.2Ga continental crust in the Yangtze craton of south China and its implications for Archean crustal evolution and Phanerozoic tectonics. Geology, 28:11-14
[5] ［5］Song Honglin. 1995. Development in studies of metamorphic complex and its general features and genesis. Earth Science Frontiers, 2(1): 103-110 (in Chinese with English abstract)
[6] ［6］Song Honglin, Shan Wenlang and Fu Zhaoren. 1992. On ductile layer within crust and its structural occurrence. Geoscience, 6:494-503 (in Chinese with English abstract)
[7] ［7］Tang Yongchen, Wu Yanchang, Chu Guozheng, Xin Fengming, Wang Yongmian, Cao Fenyang and Chang Yinfou. 1998. Geology of Cu-Au Polymetallic Ore Deposits along Yangtze River in Anhui. Beijing: Geological Publishing House, 73-110 (in Chinese)
[8] ［8］Xing Fengming, Xu Xiang and Li Zhichang. 1993. Discovery of Early Proterozoic basement in Middle to Lower Yangtze region and its significance. Chinese Sci. Bull., 38:1883-1886 (in Chinese)
[9] ［9］Zhang H, Zheng YF, Zheng MG, Yeng JL. 1990. Early Archean inheritance in zircon from Mesozoic Dalongshan granitoids in the Yangtze foldbelt of southeast China. Geochem. J., 24:133-144
[10] ［10］陆松年,杨春亮,蒋明媚,李怀坤,李惠民.1996. 前寒武纪大陆地壳演化示踪.北京:地质出版社,1-19
[11] ［11］宋鸿林. 1995. 变质核杂岩研究进展、基本特征及成因探讨. 地学前缘, 2(1-2):103-110
[12] ［12］宋鸿林, 单文琅, 傅昭仁. 1992. 论壳内韧性流层及其构造表现. 现代地质, 6: 494-503
[13] ［13］唐永成,吴言昌,储国正,邢凤鸣,王永敏,曹奋扬,常印佛. 1998. 安徽沿江地区铜金多金属矿床地质. 北京:地质出版社, 73-110
[14] ［14］邢凤鸣, 徐祥, 李志昌. 1993. 长江中下游早元古代基底的发现及意义. 科学通报, 38:1883-1886
-
计量
- 文章访问数: 8647
- PDF下载数: 5991
- 施引文献: 0
下载: