Zircon U-Pb chronology and its geological implications of Mesozoic volcanic rocks from the Hailaer basin
-
摘要:
本文报导了海拉尔盆地巴彦呼舒凹陷楚2井南屯组(K1n) 和楚3井兴安岭群(J3xn)6个流纹岩中锆石的LA-ICP-MS U-Pb定年结果，以便精确限定盆地内火山岩形成的时代以及火山活动与盆地形成和演化之间的关系。6个流纹岩中的锆石均呈自形-半自形晶，显示典型的岩浆生长环带或条痕状吸收，并具有较高的Th/U比值(0.48~2.41)，表示其为岩浆成因。楚2井南屯组(K1n)1个流纹岩中锆石的206Pb/ 238U年龄介于123~134Ma之间，其加权平均年龄为127±2Ma，代表了该火山岩的形成时代为早白垩世晚期；楚3井兴安岭群5个样品的锆石206Pb/ 238U年龄分别为120±1Ma、127±4Ma、125±1Ma、125±1Ma和126±1Ma，表明其形成时代为早白垩世晚期，并非前人确定的晚侏罗世。除了上述年龄外，流纹岩中还存在140~168Ma的捕获锆石，这与区域上出露的塔木兰沟组火山岩的形成时代相吻合。根据上述定年结果并结合前人的资料，海拉尔盆地南屯组和兴安岭群火山岩的形成时代为早白垩世晚期，火山活动时间为中生代晚侏罗世-早白垩世，这与我国东部中生代火成岩活动的年代一致。从东北地区中生代火山岩的定年结果及其空间展布来看，海拉尔盆地的形成与演化应与环太平洋构造体系有关，即古太平洋板块的俯冲作用。
Abstract:This paper presents the LA-ICP-MS zircon ages of 6 rhyolite samples in the Nantun Formation (K1n) from Well Chu 2 and in the Xing'anling Group (J3xn) from Well Chu 3, to constrain the volcanic rocks' exact formation time and their relation to the fomation and evolution of the Hailaer basin. Zircon grains from the 6 rhyolite samples are euhedral to subhedral in shape and show the typical oscillatory zoning or striped absorption with Th/U ratios range from 0.48 to 2.41, implying that they should be magmatic in origin. The 206Pb/238U ages of zircons from the rhyolite sample of the Nantun Formation (K1n) in Well Chu 2 range from 123Ma to 134Ma, with a weighted mean 206Pb/ 238U age of 127±2Ma, representing the formation time of the volcanic rocks, is Early Cretacesous. Zircon grains in other five rhyolite samples from the Xing'anling Group (J3xn) in Well Chu 3 show weighted mean 206Pb/ 238U ages of 120±1Ma, 127±4Ma, 125±1Ma, 125±1Ma and 126±1Ma, respectively, indicating that the volcanic rocks was formed in Early Cretacesous rather than Late Jurassic as previously believed. Besides these ages, there are some captured zircons in rhyolites with the ages of 140~168Ma, which coincide with the formation time of volcanic rocks in the Tamulangou Formation in the same region. Our data shows that the volcanic rocks in the Nantun Formation and the Xing'anling Group formed in Early Cretacesous, which are close to the age of the Mesozoic volcanic activities in eastern China. Combined with the spatial variations of ages of the Mesozoic volcanic rocks in northeastern China, it is suggusted that the formation and evolution of the Hailaer basin are related to the subduction of the Paleo-Pacific plate.
-
Key words:
- Hailaer basin /
- U-Pb zircon dating /
- Rhyolite /
- Mesozoic /
- Nantun Formation /
- Xing'anling Group
-
-
图 1
海拉尔盆地构造单元划分和流纹岩定年样品位置
Figure 1.
Sketch geological map showing tectonic units and sampling location for the Hailaer basin
图 2
楚2井和楚3井岩性柱状图和采样位置
Figure 2.
Column diagram of the Well Chu 2 and Well Chu 3 showing lithology and sampling positions
图 3
海拉尔盆地中生代火山岩部分锆石阴极发光图像
Figure 3.
CL images of the selected zircons from the Mesozoic volcanic rocks of the Hailaer basin
图 4
海拉尔盆地中生代火山岩中锆石LA-ICP-MS U-Pb年龄谐和图
Figure 4.
U-Pb concordia diagrams showing the LA-ICP-MS zircon data for the Mesozoic volcanic rocks of the Hailaer basin
-
Andersen T. 2002. Correction of common lead in U-Pb analyses that do not report 204Pb. Chemical Geology, 192(1-2): 59-79
Bureau of Geology and Mineral Resources of Heilongjiang Province. 1993. Regional Geology of Heilongjiang Province. Beijing: Geological Publishing House, 1-734 (in Chinese)
Bureau of Geology and Mineral Resources Inner Mongolia Autonomous Region. 1991. Regional Geology of Inner Mongolia Autonomous Region. Beijing: Geological Publishing House, 1-725 (in Chinese)
Chen JL, Wu HY, Zhu DF, Lin CH and Yu DS. 2007. Tectonic evolution of the Hailar basin and its potentials of oil-gas exploration. Chinese Journal of Geology, 42(1): 147-159(in Chinese with English abstract)
Dai SQ, Deng JF, Wu ZX, Zhao GL, Chen JF and Du JG. 2003. Evidence of magmatic petrology for the Yanshanian orogeny in the Dabie orogen. Geology in China, 30(2): 59-165(in Chinese with English abstract)
Davis GA, Zheng YD, Wang C, Zhang CH and George G. 2001. Mesozoic tectonic evolution of the Yanshan fold and thrust belt, with emphasis on Hebei and Liaoning provinces, northern China. In: Hendrix MS and Davis GA (eds.). Paleozoic and Mesozoic Tectonic Evolution of Central Asia: From Continental Assembly to Intracontinental Deformation. Geological Society of America Memoir, 194: 171-198
Fan WM, Guo F, Wang YJ and Lin G. 2003. Late Mesozoic calc-alkaline volcanism of post-orogenic extension in the northern Da Hinggan Mountains, northeastern China. Journal of Volcanology and Geothermal Research, 121(1-2): 115-135
Ge WC, Lin Q, Sun DY, Wu FY, Yuan ZK, Li WY, Chen MZ and Yin CX. 1999. Geochemical characteristics of the Mesozoic basalts in Da Hinggan Ling: Evidence of the mantle crust interaction. Acta Petrologica Sinica, 15(3): 396-407(in Chinese with English abstract)
Ge WC, Li XH, Lin Q, Sun DY, Wu FY and Yin CX. 2001. Geochemistry of Early Cretaceous alkaline rhyolites from Hulun Lake, Da Xing'anling and its tectonic implications. Chinese Journal of Geology, 36(2): 176-183(in Chinese with English abstract)
Ge WC, Wu FY, Zhou CY and Rahman AAA. 2005. Emplacement age of the Tahe granite and its constraints on the tectonic nature of the Eguna block in the northern part of the Daxing'anling. Chinese Science Bulletin, 50(12): 1239-1247(in Chinese)
Guo F, Fan WM, Wang YJ and Lin G. 2001. Petrogenesis of the Late Mesozoic bimodal volcanic rocks in the southern Da Hinggan Mts, China. Acta Petrologica Sinica, 17(1): 161-168(in Chinese with English abstract)
Guo F, Nakamura E, Fan WM, Kobayashi K and Li CW. 2007. Generation of Palaeocene adakitic andesites by magma mixing, Yanji Area, NE China. Journal of Petrology, 48: 661-692
Jahn BM, Wu FY, Capdevila R, Martineau F, Wang YX and Zhao ZH. 2001. Highly evolved juvenile granites with tetrad REE patterns: The Woduhe and Baerzhe granites from the Great Xing'an Mountains in NE China. Lithos, 59(4): 171-198
Jiang GY and Quan H. 1988. Mesozoic volcanic rocks of Genhe and Hailaer basin in Da Hinggan Ling. Bulletin of Shenyang Institute of Geology and Mineral Resources, Chinese Academy of Geology Science, (17): 23-100(in Chinese)
Li PP, Ge WC and Zhang YL. 2010. Division of volcanic strata in the northwestern part of Hailar basin: Evidence from zircon U-Pb dating. Acta Petrologica Sinica, 26(8): 2482-2494(in Chinese with English abstract)
Li PZ and Yu JS. 1993. Nianzishan miarolitic alkaline granite stock, Heilongjiang: Its ages and geological implications. Geochimica, (4): 389-398(in Chinese with English abstract)
Li ST and Lu FX. 1997. The Meso-Cenozoic Basin Evolution and Its Geodynamic Setting in Eastern China and Its Adjacent Areas. Wuhan: China University of Geosciences Press, 1-350 (in Chinese)
Li WG. 1996. Lithostratigraphy of Inner Mongolia Autonomous Region. Wuhan: China University of Geosciences Press, 1-344(in Chinese)
Lin Q, Ge WC, Cao L, Sun DY and Lin JG. 2003. Geochemistry of Mesozoic volcanic rocks in Da Hinggan Ling: The bimodal volcanic rocks. Geochimica, 32(3): 208-222(in Chinese with English abstract)
Liu JL, Davis GA, Lin ZY and Wu FY. 2005. The Liaonan metamorphic core complex, southeastern Liaoning Province, North China: A likely contributor to Cretaceous rotation of eastern Liaoning, Korea and contiguous areas. Tectonophysics, 407(1-2): 65-80
Meng E, Xu WL, Yang DB, Qiu KF, Li CH and Zhu HT. 2011. Zircon U-Pb chronology, geochemistry of Mesozoic volcanic rocks from the Lingquan basin in Manzhouli area, and its tectonic implications. Acta Petrologica Sinica, 27(4): 1209-1226(in Chinese with English abstract)
Meng QR. 2003. What drove Late Mesozoic extension of the northern China-Mongolia tract? Tectonophysics, 369(3-4): 155-174
Pei FP, Xu WL, Yang DB, Ji WQ, Yu Y and Zhang XZ. 2008. Mesozoic volcanic rocks in the southern Songliao basin: Zircon U-Pb ages and their constraints on the nature of basin basement. Earth Science, 33(5): 603-617 (in Chinese with English abstract)
Peng YD, Zhang LD, Chen W, Zhang CJ, Guo SZ, Xing DH, Jia B, Chen SW and Ding QH. 2003. 40Ar/39Ar and K-Ar dating of the Yixian Formation volcanic rocks, western Liaoning province, China. Geochimica, 32(5): 427-435(in Chinese with English abstract)
Qu GS. 2008. Lithosratigraphy of Heilongjiang Province. Wuhan: China University of Geosciences Press, 1-298(in Chinese)
Shao JA, Li XH, Zhang LQ, Mu BL and Liu YL. 2001. Geochemical condition for genetic mechanism of the Mesozoic bimodal dike swarms in Nankou-Guyaju. Geochemica, 30(6): 517-524(in Chinese with English Abstract)
Wang F, Zhou XH, Zhang LC, Ying JF, Zhang YT, WuFY and Zhu RX. 2006. Late Mesozoic volcanism in the Great Xing'an Range (NE China): Timing and implications for the dynamic setting of NE Asia. Earth and Planetary Science Letters, 251(1-2): 179-198
Wang YQ, Su YZ and Liu EY. 1997. The Crust in Northeastern China. Wuhan: China University of Geosciences Press, 1-175(in Chinese)
Wu FY, Sun DY, Li HM, Jahn BM and Wider SA. 2002. A-type granites in northeastern China: Age and geochemical constraints on their petrogenesis. Chemical Geology, 187(1-2): 143-173
Wu FY, Lin JQ, Wilde SA, Zhang XO and Yang JH. 2005. Nature and significance of the Early Cretaceous giant igneous event in eastern China. Earth and Planetary Science Letters, 233(1-2): 103-119
Wu HY, Wang SH, Yang JG, Tang ZH, Wang ZJ and Zhang QS. 2004. Analysis of exploration potential in surrounding basins of Daqing oilfield. China Petroleum Exploration, (4): 23-31(in Chinese with English abstract)
Xie LW, Zhang YB, Zhang HH, Sun JF and Wu FY. 2008. In situ simultaneous determination of trace elements, U-Pb and Lu-Hf isotopes in zircon and baddeleyite. Chinese Science Bulletin, 53(10): 1565-1573
Yang CH, Xu WL, Yang DB, Liu CC, Liu XM and Hu ZC. 2005. Petrogenesis of Mesozoic high-Mg diorites in western Shandong: Evidence from chronology and petro-geochemistry. Journal of China University of Geosciences, 16(4): 297-308
Yang CH, Xu WL, Yang DB, Wang W, Wang WD and Liu JM. 2008. Petrogenesis of Shangyu gabbro-diorites in western Shandong: Geochronological and geochemical evidence. Science in China (Series D), 51(4): 481-492
Yang JH, Wu FY, Chung SL, Wilde SA and Chu MF. 2006. A hybrid origin for the Qianshan A-type granites, Northeast China: Geochemical and Sr-Nd-Hf isotopic evidence. Lithos, 89(1-2): 89-106
Yang JH, Wu FY, Shao JA, Xie LW and Liu XM. 2006. In-situ U-Pb dating and Hf isotopic analyses of zircons from volcanic rocks of the Houcheng and Zhangjiakou formations in the Zhang-Xuan area, Northeast China. Earth Science, 31(1): 71-80(in Chinese with English abstract)
Yang JH, Wu FY, Chung SL, Lo CH, Wilde SA and Davis GA. 2008. Rapid exhumation and cooling of the Liaonan metamorphic core complex: Inferences from 40Ar/39Ar thermochronology and implications for Late Mesozoic extension in the eastern North China Craton. The Geological Society of America Bulletin, 119(11-12): 1405-1414
Yin ZG, Zhao HB, Zhao HD and Zhang YL. 2005. Geochemical characteristics and tectonic setting of basaltic rocks of the Tamulangou Formation at the northern end of the Da Hinggan Mountains, China. Geological Bulletin of China, 24(9): 848-853(in Chinese with English abstract)
Yin ZG, Zhang YL, Yang XP, Zhao HD and Han ZZ. 2006. Characteristics of Mesozoic volcanic rocks and magma evolution in northern Daxinganling. Global Geology, 25(2): 120-128(in Chinese with English abstract)
Yuan HL, Liu XM, Liu YS, Gao S and Ling WL. 2005. Research of zircon U-Pb chronology, geochemistry of Mesozoic volcanic rocks from the Xishan of Beijing. Science in China (Series D), 35(9): 821-836(in Chinese)
Zhang LQ, Shao JA and Zheng GR. 1998. Metamorphic core complex in Ganzhuermiao, Inner Mongolia. Scientia Geologica Sinica, 33(2): 140-146(in Chinese with English abstract)
Zhang JH, Ge WC, Wu FY and Liu XM. 2006. Mesozoic bimodal volcanic suite in Zhalantun of the Da Hinggan Range and its geological significance: Zircon U-Pb age and Hf isotopic constraints. Acta Geologica Sinica, 80(1): 58-69
Zhang JH, Ge WC, Wu FY, Wilde SA, Yang JH and Liu XM. 2008. Large-scale Early Cretaceous volcanic events in the northern Great Xing'an Range, northeastern China. Lithos, 102(1-2): 138-157
Zhang YT, Zhang LC, Ying JF, Zhou XH, Wang F, Hou QL and Liu Q. 2007. Geochemistry and source characteristics of Early Cretaceous volcanic rocks in Tahe, north Da Hinggan Mountain. Acta Petrologica Sinica, 23(11): 2811-2822(in Chinese with English abstract)
Zhao GL, Yang GL, Fu JY et al. 1989. The Mesozoic Volcanic Rocks in the South Central Great Xing'an Range. Beijing: Science and Technology Publishing House, 1-260(in Chinese)
-
下载:
图(5)
计量
- 文章访问数: 7475
- PDF下载数: 8733
- 施引文献: 0