The constraints of captured zircon ages from Mesozoic diorite porphyrite vein in Guichi area of Anhui Province on the basement nature of Jiangnan transitional zone
WANG Cunzhi, ZHANG Xiang, HUANG Zhizhong, SONG Shiming, JU Dongmei, CHU Pingli
Nanjing Center, China Geological Survey, Jiangsu Nanjing 210016, China
Abstract：Jiangnan transitional zone is located in the northern margin of Jiangnan Orogenic belt of the lower Yangtze area. In order to investigate the basal nature of Jiangnan transitional zone, the authors conducted U-Pb chronology and Hf isotope analysis on captured zircons developed in the Mesozoic diorite porphyrite vein of Huazhili village in Guizhi area. The results show that these zircons have a relatively scattered age distribution, and the age-weighted average of the five primary zircons is (147.7±2.2) Ma, indicating the age of the vein formation. Except for the oldest one with the age of (3 263±44) Ma, the captured zircon ages are mainly distributed in 850~712 Ma, 1 346~1 139 Ma, 2 283~1 828 Ma and 2 944~2 302 Ma, which are consistent with the distribution ages of detrital zircons in Dongling Group of middle and lower reaches of Changjiang River. The zircon Hf isotopic compositions are similar to those in Dongling Group and Kongling Group rocks, which are different from the basement rocks of Jiangnan orogenic belt, indicating the existence of “Jiangbei” basement in this area. At the same time, Changzhou-Chongyang Fault cannot be used as the boundary between “Jiangbei” and “Jiangnan” basement in Lower Yangtze area, and it is predicted that the boundary is located in Jiangnan Fault, which is more to the south. This new understanding helps us to deepen our understanding of the tectonic pattern of Lower Yangtze area.
王存智, 张翔, 黄志忠, 宋世明, 鞠冬梅, 褚平利. 安徽省贵池地区中生代闪长玢岩脉捕获锆石年龄对江南过渡带基底性质的制约[J]. 中国地质调查, 2023, 10(5): 71-81.
WANG Cunzhi, ZHANG Xiang, HUANG Zhizhong, SONG Shiming, JU Dongmei, CHU Pingli. The constraints of captured zircon ages from Mesozoic diorite porphyrite vein in Guichi area of Anhui Province on the basement nature of Jiangnan transitional zone. , 2023, 10(5): 71-81.
[1] 常印佛,董树文,黄德志.论中—下扬子“一盖多底”格局与演化[J].火山地质与矿产,1996,17(1/2):1-15. Chang Y F,Dong S W,Huang D Z.On tectonics of “poly-basement with one cover” in Middle-Lower Yangtze craton China[J].Volcanology and Mineral Resources,1996,17(1/2):1-15. [2] 董树文,马立成,刘刚,等.论长江中下游成矿动力学[J].地质学报,2011,85(5):612-625. Dong S W,Ma L C,Liu G,et al.On dynamics of the metallogenic belt of middle-lower reaches of Yangtze River,Eastern China[J].Acta Geologica Sinica,2011,85(5):612-625. [3] Chen Z H,Xing G F.Geochemical and zircon U-Pb-Hf-O isotopic evidence for a coherent Paleoproterozoic basement beneath the Yangtze Block,South China[J].Precambrian Research,2016,279:81-90. [4] 张旗,简平,刘敦一,等.宁芜火山岩的锆石SHRIMP定年及其意义[J].中国科学(D辑),2003,46(8):830-837. Zhang Q,Jian P,Liu D Y,et al.SHRIMP dating of volcanic rocks from Ningwu area and its geological implications[J].Science in China Series D:Earth Sciences,2003,46(8):830-837. [5] 王彦斌,刘敦一,曾普胜,等.铜陵地区小铜官山石英闪长岩锆石SHRIMP的U-Pb年龄及其成因指示[J].岩石矿物学杂志,2004,23(4):298-304. Wang Y B,Liu D Y,Zeng P S,et al.SHRIMP U-Pb geochrono-logy of Xiaotongguanshan quartz-dioritic intrusions in Tongling district and its petrogenetic implications[J].Acta Petrologica et Mineralogica,2004,23(4):298-304. [6] 吴淦国,张达,狄永军,等.铜陵矿集区侵入岩SHRIMP锆石U-Pb年龄及其深部动力学背景[J].中国科学D辑:地球科学,2008,38(5):630-645. Wu G G,Zhang D,Di Y J,et al.The SHRIMP zircon U-Pb ages and deep-seated tectonic background of intrusive rocks in the Tongling mining district[J].Science China (Earth Sciences),2008,38(5):630-645. [7] 杨鑫朋,刘蓓蓓,程洲,等.皖浙赣相邻区构造活动ESR测年、Ar-Ar测年及其构造年代学意义[J].中国地质调查,2022,9(6):23-32. Yang X P,Liu B B,Cheng Z,et al.ESR dating,Ar-Ar dating and its tectonic implications of tectonic activity in adjacent area of Anhui-Zhejiang-Jiangxi[J].Geological Survey of China,2022,9(6):23-32. [8] Yan J,Liu J M,Li Q Z,et al.In situ zircon Hf-O isotopic analyses of late Mesozoic magmatic rocks in the Lower Yangtze River Belt,central eastern China:Implications for petrogenesis and geodynamic evolution[J].Lithos,2015,227:57-76. [9] 常印佛,刘湘培,吴言昌.长江中下游铜铁成矿带[M].北京:地质出版社,1991:71-76. Chang Y F,Liu X P,Wu Y C.The Copper-Ironmineralization Belt in the Middle-Lower Reaches of the Yangtze River[M].Beijing:Geological Publishing House,1991:71-76. [10] 闫峻,后田结,王爱国,等.皖南中生代早期成矿和晚期非成矿花岗岩成因对比[J].中国科学:地球科学,2017,47(11):1269-1291. Yan J,Hou T J,Wang A G,et al.Petrogenetic contrastive studies on the Mesozoic early stage ore-bearing and late stage ore-barren granites from the southern Anhui Province[J].Science China Earth Sciences,2017,60(11):1920-1941. [11] 聂张星,石磊,古黄玲,等.江南过渡带东至查册桥金矿床<inline-formula><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="Mml1-2095-8706-10-5-71"><mml:msup><mml:mrow><mml:mi mathvariant="normal"> </mml:mi></mml:mrow><mml:mrow><mml:mn>40</mml:mn></mml:mrow></mml:msup><mml:mi mathvariant="normal">Ar</mml:mi><mml:msup><mml:mrow><mml:mo>-</mml:mo></mml:mrow><mml:mrow><mml:mn>39</mml:mn></mml:mrow></mml:msup></mml:math></inline-formula>Ar年代学及成矿条件研究[J].大地构造与成矿学,2017,41(3):502-515. Nie Z X,Shi L,Gu H L,et al.40Ar-39Ar geochronology and its geological significance of Zhaceqiao gold deposit in Dongzhi,Jiangnan transition zone[J].Geotectonica et Metallogenia,2017,41(3):502-515. [12] 闫峻,刘海泉,宋传中,等.长江中下游繁昌—宁芜火山盆地火山岩锆石U-Pb年代学及其地质意义[J].科学通报,2009,54(12):1716-1724. Yan J,Liu H Q,Song C Z,et al.Zircon U-Pb geochronology of the volcanic rocks from Fanchang-Ningwu volcanic basins in the Lower Yangtze region and its geological implications[J].Chinese Science Bulletin,2009,54(16):2895-2904. [13] 闫峻. 长江中下游—大别造山带中生代火山岩特征及成因[J].华东地质,2022,43(4):375-390. Yan J.Characteristics and petrogenesis of the Mesozoic volcanic rocks from the Middle-Lower Yangtze River Belt and the Dabie Orogen[J].East China Geology,2022,43(4):375-390. [14] Chen L,Zhao Z F,Zheng Y F.Origin of andesitic rocks:Geochemical constraints from Mesozoic volcanics in the Luzong basin,South China[J].Lithos,2014,190-191:220-239. [15] Chen L,Zheng Y F,Zhao Z F.Geochemical constraints on the origin of Late Mesozoic andesites from the Ningwu basin in the Middle-Lower Yangtze Valley,South China[J].Lithos,2016,254-255:94-117. [16] 薛怀民. 长江中下游火山岩带东南缘溧阳盆地火山作用的年代学、地球化学及岩浆成因探讨[J].地球化学,2016,45(3):213-234. Xue H M.Geochronology,geochemistry and petrogenesis of volcanism in the Liyang volcanic basin on the southeastern margin of the Middle-Lower Yangtze region[J].Geochimica,2016,45(3):213-234. [17] 王存智,黄志忠,赵希林,等.长江中下游宣城水东地区早白垩世酸性火山岩年代学、地球化学及岩石成因[J].岩石矿物学杂志,2018,37(5):697-715. Wang C Z,Huang Z Z,Zhao X L,et al.Geochronology,geochemistry and petrogenesis of Early Cretaceous acid volcanic rocks in Shuidong area,Xuancheng City,in the middle-lower reaches of the Yangtze River[J].Acta Petrologica et Mineralogica,2018,37(5):697-715. [18] 周涛发,范裕,袁峰.长江中下游成矿带成岩成矿作用研究进展[J].岩石学报,2008,24(8):1665-1678. Zhou T F,Fan Y,Yuan F.Advances on petrogensis and metallogeny study of the mineralization belt of the Middle and Lower Reaches of the Yangtze River area[J].Acta Petrologica Sinica,2008,24(8):1665-1678. [19] Song G X,Qin K Z,Li G M,et al.Mesozoic magmatism and metallogeny in the Chizhou area,Middle-Lower Yangtze Valley,SE China:Constrained by petrochemistry,geochemistry and geochronology[J].Journal of Asian Earth Sciences,2014,91:137-153. [20] Liu Y S,Hu Z C,Gao S,et al.In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard[J].Chemical Geology,2008,257(1-2):34-43. [21] Liu Y S,Gao S,Hu Z C,et al.Continental and oceanic crust recycling-induced melt-peridotite interactions in the Trans-North China Orogen:U-Pb dating,Hf isotopes and trace elements in zircons from mantle xenoliths[J].Journal of Petrology,2010,51(1/2):537-571. [22] Ludwig K R.Isoplot/EX Version 2.49:A Geochronological Toolkit for Microsoft Excel[M].Berkeley:Berkeley Geochronology Center Special Publication,2003,1a:1-56. [23] Scherer E,Munker C,Mezger K.Calibration of the lutetium-hafnium clock[J].Science,2001,293(5530):683-687. [24] Blichert-Toft J,Albarède F.The Lu-Hf isotope geochemistry of chondrites and the evolution of the mantle-crust system[J].Earth and Planetary Science Letters,1997,148(1-2):243-258. [25] Vervoort J D,Blichert-Toft J.Evolution of the depleted mantle:Hf isotope evidence from juvenile rocks through time[J].Geochimica et Cosmochimica Acta,1999,63(3-4):533-556. [26] Griffin W L,Wang X,Jackson S E,et al.Zircon chemistry and magma mixing,SE China:In-situ analysis of Hf isotopes,Tonglu and Pingtan igneous complexes[J].Lithos,2002,61(3-4):237-269. [27] 毛景文,谢桂青,李晓峰,等.大陆动力学演化与成矿研究:历史与现状——兼论华南地区在地质历史演化期间大陆增生与成矿作用[J].矿床地质,2005,24(3):193-205. Mao J W,Xie G Q,Li X F,et al.Geodynamic process and metallogeny:History and present research trend,with a special discussion on continental accretion and related metallogeny throughout geological history in South China[J].Mineral Deposits,2005,24(3):193-205. [28] Wang Q,Wyman D A,Xu J F,et al.Early Cretaceous adakitic granites in the Northern Dabie Complex,central China:Implications for partial melting and delamination of thickened lower crust[J].Geochimica Et Cosmochimica Acta,2007,71(10):2609-2636. [29] Liu S A,Li S G,He Y S,et al.Geochemical contrasts between early Cretaceous ore-bearing and ore-barren high-Mg adakites in central-eastern China:Implications for petrogenesis and Cu-Au mineralization[J].Geochimica Et Cosmochimica Acta,2010,74(24):7160-7178. [30] Mao J W,Xie G Q,Duan C,et al.A tectono-genetic model for porphyry-skarn-stratabound Cu-Au-Mo-Fe and magnetite-apatite deposits along the Middle-Lower Yangtze River Valley,Eastern China[J].Ore Geology Reviews,2011,43(1):294-314. [31] Xie J C,Yang X Y,Sun W D,et al.Early Cretaceous dioritic rocks in the Tongling region,eastern China:Implications for the tectonic settings[J].Lithos,2012,150:49-61. [32] Li X H,Li Z X,Li W X,et al.Revisiting the “C-type adakites” of the Lower Yangtze River Belt,central eastern China:In-situ zircon Hf-O isotope and geochemical constraints[J].Chemical Geology,2013,345:1-15. [33] 吴才来,郭祥焱,王次松,等.铜陵地区高钾钙碱性系列侵入岩锆石U-Pb年代学及其地质意义[J].地球化学,2013,42(1):11-28. Wu C L,Guo X Y,Wang C S,et al.Zircon U-Pb dating of high-K calc-alkaline intrusive rocks from Tongling:Implications for the tectonic setting[J].Geochimica,2013,42(1):11-28. [34] Wang S W,Zhou T F,Yuan F,et al.Geological and geochemical studies of the Shujiadian porphyry Cu deposit,Anhui Province,Eastern China:Implications for ore genesis[J].Journal of Asian Earth Sciences,2015,103:252-275. [35] 袁峰,周涛发,范裕,等.安徽繁昌盆地中生代火山岩锆石LA-ICP MS U-Pb年龄及其意义[J].岩石学报,2010,26(9):2805-2817. Yuan F,Zhou T F,Fan Y,et al.LA-ICPMS U-Pb ages of zircons from Mesozoic volcanic rocks and their significance in Fanchang basin,Anhui Province,China[J].Acta Petrologica Sinica,2010,26(9):2805-2817. [36] 杜玉雕,魏国辉.安徽庐枞盆地枞阳地区玄武质火山岩地球化学特征及其地质意义[J].华东地质,2019,40(3):188-198. Du Y D,Wei G H.Geochemical characteristics and geological significance of the basaltic volcanic rocks in the Zongyang area of Luzong Basin,Anhui Province[J].East China Geology,2019,40(3):188-198. [37] Wu F Y,Ji W Q,Sun D H,et al.Zircon U-Pb geochronology and Hf isotopic compositions of the Mesozoic granites in southern Anhui Province,China[J].Lithos,2012,150:6-25. [38] 王小龙,曾键年,马昌前,等.宁镇地区燕山期侵入岩锆石U-Pb定年:长江中下游新一期成岩成矿作用的年代学证据[J].地学前缘,2014,21(6):289-301. Wang X L,Zeng J N,Ma C Q,et al.Zircon U-Pb dating of Yan-shanian intrusive rocks in Ningzhen District,Jiangsu:The chronology evidence for a new stage of petrogensis and metallogeny in the Middle and Lower Reaches of Yangtze River[J].Earth Science Frontiers,2014,21(6):289-301. [39] Wang Q,Wyman D A,Xu J F,et al.Petrogenesis of Cretaceous adakitic and shoshonitic igneous rocks in the Luzong area,Anhui Province (eastern China):Implications for geodynamics and Cu-Au mineralization[J].Lithos,2006,89(344):424-446. [40] Zhang S B,Zheng Y F,Wu Y B,et al.Zircon isotope evidence for ≥3.5 Ga continental crust in the Yangtze craton of China[J].Precambrian Research,2006,146(1/2):16-34. [41] Zhang S B,Zheng Y F.Formation and evolution of Precambrian continental lithosphere in South China[J].Gondwana Research,2013,23(4):1241-1260. [42] 邢凤鸣,徐祥,李志昌.长江中下游早元古代基底的发现及意义[J].科学通报,1993,38(20):1883-1886. [43] Grimmer J C,Ratschbacher L,McWilliams M,et al.When did the ultrahigh-pressure rocks reach the surface? A 207Pb/206Pb zircon,40Ar/39Ar white mica,Si-in-white mica,single-grain provenance study of Dabie Shan synorogenic foreland sediments[J].Chemical Geology,2003,197(1/2/3/4):87-110. [44] Guo J L,Gao S,Wu Y B,et al.3.45 Ga granitic gneisses from the Yangtze Craton,South China:Implications for Early Archean crustal growth[J].Precambrian Research,2014,242:82-95. [45] Zhang S B,He Q,Zheng Y F.Geochronological and geochemical evidence for the nature of the Dongling Complex in South China[J].Precambrian Research,2015,256:17-30. [46] Wang X L,Zhou J C,Wan Y S,et al.Magmatic evolution and crustal recycling for Neoproterozoic strongly peraluminous granitoids from southern China:Hf and O isotopes in zircon[J].Earth and Planetary Science Letters,2013,366:71-82. [47] 李武显,周新民,李献华,等.庐山“星子变质核杂岩”中伟晶岩锆石U-Pb年龄及其地质意义[J].地球科学,2001,26(5):491-495. Li W X,Zhou X M,Li X H,et al.Zircon U-Pb dating of pegmatite from Xingzi metamorphic core complex of Lushan mountain and its geological implication[J].Earth Science,2001,26(5):491-495. [48] 朱清波,杨坤光,王艳.庐山变质核杂岩伸展拆离和岩浆作用的年代学约束[J].大地构造与成矿,2010,34(3):391-401. Zhu Q B,Yang K G,Wang Y.Extensional detachment and magmatism of the Lushan metamorphic core complex:Constraints from 40Ar/39Ar and U-Pb geochronology[J].Geotectonica et Metallogenia,2010,34(3):391-401. [49] 关俊朋,何斌,李德威.庐山地区星子群碎屑锆石SIMS U-Pb年龄及其地质意义[J].大地构造与成矿,2010,34(3):402-407. Guan J P,He B,Li D W.SIMS U-Pb dating of the detrital zircons from the Xingzi Group in Lushan area and its geological significance[J].Geotectonica et Metallogenia,2010,34(3):402-407. [50] 尹国胜,谢国刚.江西庐山地区伸展构造与星子变质核杂岩[J].中国区域地质,1996(1):17-26. Yin G S,Xie G G.Extensional structure and the Xingzi metamorphic core complex in the Lushan area,Jiangxi[J].Regional Geology of China,1996(1):17-26.
2023, Vol. 10 
