Citation: | JIA Xiaohui, WANG Xiaodi, YANG Wenqiang. Constraints of geochemistry, geochronology and Sr-Nd-Hf isotopes on the Xinzhai peralu-minous granite in northern Guangxi:implications for petrogenesis and tectonic significance[J]. Geological Bulletin of China, 2017, 36(5): 738-749. |
LA-ICP-MS zircon U-Pb dating shows that the Xinzhai granites, emplaced in northern Guangxi, were generated in Mid-dle Ordovician (465±2Ma).These granites are characterized by uniform silicon content (SiO2=68.54%~4.57%), enrichment of alkali val-ues and considerable enrichment of K values (K2O+Na2O=7.61%~8.31%, K2O/Na2O=1.77~2.35), concentration of peraluminous (A/CNK=1.09~2.39) and high large ion lithophile elements (LILE)(e.g., Rb, K, Th) but relative depletion of high field-strength el-ements (HFSE)(e.g., Nb, Ta, P, Ti) and Sr.They belong to S-type granite.Granitic samples have homogeneous Sr-Nd isotope compositions (ISr=0.71137~0.71328, ε Nd (t)=-7.89~-7.26).Zircon Hf isotope compositions of the Xinzhai granites have relatively wide ranges (176Hf/177Hf=0.28232~0.28252, εHf(t)=-6.18~+0.61, TDM2=1.67~2.11Ga).The authors hold that the Xinzhai granites were likely generated by partial melting of Paleoproterozoic metapelite, with the addition of small amounts of mafic magma mantle-derived material.The Xinzhai S-type granites might have been the petrological response to the second activity of the Kwangsian orogen in northern Guangxi, which provided new evidence for the establishment of the Early Paleozoic tectonic-magma events in South China.
[1] | 陈洪德, 侯明才, 许效松, 等.加里东期华南的盆地演化与层序格架[J].成都理工大学学报(自然科学版), 2006, 33(1):1-8. |
[2] | Hs K J, Li J L, Chen H H, et al. Tectonics of South China:key to tectonics of South China:key to understanding west Pacific geology[J]. Tectonophysics, 1990, 193:9-39. |
[3] | Ma L, Chen H J, Gan K W, et al. Geotectonics and petroleum geology of marine sedimentary rocks in southern China[M]. Geological Publishing House, Beijing, 2004. |
[4] | 舒良树, 于津海, 贾东, 等.华南东段早古生代造山带研究[J].地质通报, 2008, 27(10):1581-1593. doi: 10.3969/j.issn.1671-2552.2008.10.001 |
[5] | Wang Y J, Fan W M, Zhao G C, et al. Zircon U-Pb geochronology of gneisses in Yunkai Mountains and its implications on the Caledonian event in South China[J]. Gondwana Research, 2007, 12(4):404-416. doi: 10.1016/j.gr.2006.10.003 |
[6] | Wang Y J, Zhang F F, Fan W M, et al. Tectonic setting of the South China Block in the early Paleozoic:resolving intracontinental and ocean closure models from detrital zircon U-Pb geochronology[J]. Tectonics, 2010, 29(6):1-70. |
[7] | Wang Y J, Zhang A M, Fan W M, et al. Kwangsian crustal anatexis within the eastern South China Block:geochemical, zircon U-Pb geochronological and Hf isotopic fingerprints from the gneissoid granites of Wugong and Wuyi-Yunkai Domains[J]. Lithos, 2011, 127:239-260. doi: 10.1016/j.lithos.2011.07.027 |
[8] | Wang Y J, Wu C M, Zhang A M, et al. Kwangsian and Indosinian reworking of the eastern South China Block:constraints on zircon U-Pb geochronology and metamorphismof amphibolites and granu-lites[J]. Lithos, 2012, 150:227-242. doi: 10.1016/j.lithos.2012.04.022 |
[9] | Wang Y J, Fan W M, Zhang G W, et al. Phanerozoic tectonics of the South China Block:key observations and controversies[J]. Gondwana Research, 2013, 23:1273-1305. doi: 10.1016/j.gr.2012.02.019 |
[10] | Wang Y J, Zhang A M, Fan W M, et al. Origin of paleosubduction-modified mantle for Silurian gabbro in the Cathaysia Block:geochronological and geochemical evidence[J]. Lithos, 2013, 160/161:37-54. doi: 10.1016/j.lithos.2012.11.004 |
[11] | Faure M, Shu L S, Wang B, et al. Intracontinental subduction:a possible mechanism for the Early Palaeozoic Orogen of SE China[J]. Terra Nova, 2009, 21:360-368. doi: 10.1111/ter.2009.21.issue-5 |
[12] | Charvet J, Shu L S, Faure M, et al. Structural development of the lower Paleozoic belt of South China:genesis of an intracontinental orogen[J]. Journal of Asian Earth Sciences, 2010, 39:309-330. doi: 10.1016/j.jseaes.2010.03.006 |
[13] | Huang X L, Yu Y, Li J, et al. Geochronology and petrogenesis of the early Paleozoic I-type granite in the Taishan area, South Chi-na:middle-lower crustal melting during orogenic collapse[J]. Lith-os, 2013, 177:268-284. doi: 10.1016/j.lithos.2013.07.002 |
[14] | Wan Y S, Liu D Y, Wilde S M, et al. Evolution of the Yunkai terrane, South China:evidence from SHRIMP zircon U-Pb dating, geochemistry and Nd isotope[J]. Journal of Asian Earth Sciences, 2010, 37:140-153. doi: 10.1016/j.jseaes.2009.08.002 |
[15] | Li Z X, Li X H, Wartho J A, et al. Magmatic and metamorphic events during the Early Paleozoic Wuyi-Yunkai Orogeny, southeastern South China:new age constraints and pressure-temperature conditions[J]. Geological Society of America Bulletin, 2010, 122(5/6):772-793. |
[16] | 孙涛.新编华南花岗岩分布图及其说明[J].地质通报, 2006, 25(3):3327. |
[17] | 周新民.对华南花岗岩研究的思考[J].高校地质学报, 2003, 9:556-565 doi: 10.3969/j.issn.1006-7493.2003.04.009 |
[18] | 张相训, 陈扬浦.灵川县新寨花岗岩体形成时代研究[J].广西地质, 1993, 6(1):23-28. |
[19] | 袁洪林, 吴福元, 高山, 等.东北地区新生代侵入体的锆石激光探针U-Pb年龄测定与稀土元素成分分析[J].科学通报, 2003, 48(14):1511-1520. doi: 10.3321/j.issn:0023-074X.2003.14.008 |
[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] | Anderson T. Correction of common lead in U-Pb analyses that do not report 204Pb[J]. Chemical geology, 2002, 192:59-79. doi: 10.1016/S0009-2541(02)00195-X |
[22] | Ludwig K R. ISOPLOT 3.00:A Geochronological Toolkit for Microsoft Excel[M]. California:Berkeley Geochronology Center, 2003. |
[23] | Blichert T J, Albarede 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):243-258. |
[24] | Griffin W L, Pearson N J, Belousova E, et al. The Hf isotope composition of cratonic mantle:LA-MC-ICPMS analysis of zircon megacrysts in kimberlites[J]. Geochimica et Cosmochimica Acta, 2000, 64(1):133-147. doi: 10.1016/S0016-7037(99)00343-9 |
[25] | Qu X M, Hou Z Q, Li Y G. Melt components derived from a subducted slab in late orogenic ore-bearing porphyries in the Gungdese copper belt, southern Tibetan (Xizang) plateau[J].Lithos, 2004, 74(3/4):131-148. |
[26] | 王银喜, 杨杰东, 陶仙聪, 等.化石、矿物和岩石样品的Sm-Nd同位素实验方法研究及其应用[J].南京大学学报(自然科学版), 1988, 21(2):297-308. |
[27] | Middlemost E A K.Naming materials in the magma/igneous rock system[J].Earth Science Review, 1994, 37:215-224. doi: 10.1016/0012-8252(94)90029-9 |
[28] | Peccerillo A, Taylor S R. Geochemistry of Eocene calc-alkaline volcanic rocks from the Kastamonu area, Northern Turkey[J]. Contributions of Mineralogy and Petrology, 1976, 58(1):63-8l. doi: 10.1007/BF00384745 |
[29] | 李献华.万洋山-诸广山花岗岩复式岩基的地球化学研究及地壳形成演化历史[J].地质地球化学, 1989, (3):4-5. |
[30] | 柏道远, 黄建中, 马铁球, 等.湘东南志留纪彭公庙花岗岩体的地质地球化学特征及其构造环境[J].现代地质, 2006, 20(1):130-140. |
[31] | 许德如, 陈广浩, 夏斌, 等.湘东地区板杉铺加里东期埃达克质花岗闪长岩的成因及地质意义[J].高校地质学报, 2006, 12(4):507-521. |
[32] | 耿红燕, 徐夕生, 赵明, 等.粤西白垩纪火山-侵入岩浆活动及其地质意义[J].中国科学(D辑), 2006, 36(7):601-617. |
[33] | 彭松柏, 金振民, 刘云华, 等.云开造山带强过铝深熔花岗岩地球化学, 年代学及构造背景[J].地球科学:中国地质大学学报, 2006, 31(1):110-120. |
[34] | 周新民, 孙涛, 沈渭洲, 等. 华南中生代花岗岩-火山岩时空格局与成因模式[C]//南岭地区晚中生代花岗岩成因与岩石圈动力学演化. 北京: 科学出版社, 2007: 179-195. |
[35] | 伍光英, 马铁球, 冯艳芳, 等.南岭万洋山加里东期花岗岩地质地球化学特征及其成因[J].中国地质, 2008, 35(4):608-617. |
[36] | 沈渭洲, 张芳荣, 舒良树, 等.江西宁冈岩体的形成时代, 地球化学特征及其构造意义[J].岩石学报, 2008, 24(10):2244-2254. |
[37] | 刘锐, 张利, 周汉文, 等.闽西北加里东期混合岩及花岗岩的成因:同变形地壳深熔作用[J].岩石学报, 2008, 24(6):1205-1222. |
[38] | 程顺波, 付建明, 徐德明, 等.桂东北大宁岩体锆石SHRIMP年代学和地球化学研究[J].中国地质, 2009, 36(6):1278-1288. |
[39] | 程顺波, 付建明, 徐德明, 等.湖南雪花顶花岗岩及其包体的地质地球化学特征和成因分析[J].大地构造与成矿学, 2009, 33(4):588-597. |
[40] | 王彦斌, 王登红, 韩娟, 等.湖南益将稀土-钪矿的石英闪长岩锆石U-Pb定年和Hf同位素特征:湘南加里东期岩浆活动的年代学证据[J].中国地质, 2010, 37(4):1062-1070. |
[41] | 李光来, 华仁民, 胡东泉, 等.赣南地区石雷石英闪长岩的成因:岩石化学, 副矿物微量元素, 锆石U-Pb年代学与Sr-Nd-Hf同位素制约[J].岩石学报, 2010, 26(3):903-918. |
[42] | 颜乾坤. 桂东北桂岭二长花岗岩地球化学特征及其成因[D]. 桂林理工大学硕士学位论文, 2010: 1-30. |
[43] | Sun S, McDonough W F. Chemical and isotopic systematics of oceanic basalts:Implications for mantle composition and processes[J]. Geological Society of London Special Publications, 1989, 42(1):313-345. doi: 10.1144/GSL.SP.1989.042.01.19 |
[44] | 邱检生, Mcinnes B I A, 蒋少涌, 等.江西会昌密坑山岩体的地球化学及其成因类型的新认识[J].地球化学, 2005, 34(1):20-32. |
[45] | Griffin W L, Wang X, Jackson S E. Zircon chemistry and magma genesis, SE China:in-situ analysis of Hf isotopes, Tonglu and Pingtan igneous complexes[J]. Lithos, 2002, 61:237-269. doi: 10.1016/S0024-4937(02)00082-8 |
[46] | Zeng W, Zhang L, Zhou H W, et al. Caledonian reworking of Paleoproterozoic basement in the Cathaysia Block:constraints from zircon U-Pb dating, Hf isotopes and trace elements[J]. Chinese Sci-ence Bulletin, 2008, 53(6):895-904. |
[47] | Xia Y, Xu X S, Zou H B, et al. Early Paleozoic crust-mantle interaction and lithosphere delamination in South China Block:evidence from geochronology, geochemistry, and Sr-Nd-Hf isotopes of granites[J]. Lithos, 2014, 184/187:416-435. doi: 10.1016/j.lithos.2013.11.014 |
[48] | Zhang A M, Wang Y J, Fan W M, et al. LA-ICPMS zircons UPb geochronology and Hf isotopic composition of the Taoxi migmatite (Wuping):constrains on the formation age of the Taoxi complex and the Yu'nan event[J]. Geotectonica et Metallogenia, 2011, 35(1):64-72. |
[49] | 张爱梅, 王岳军, 范蔚茗, 等.福建武平地区桃溪群混合岩U-Pb定年及其Hf同位素组成:对桃溪群时代及郁南运动的约束[J].大地构造与成矿学, 2011, 35(1):64-72. |
[50] | Shu X J, Wang X L, Sun T, et al. Crustal formation in the Nanling Range, South China Block:Hf isotope evidence of zircons from Phanerozoic granitoids[J]. Journal of Asian Earth Sciences, 2013, 74:210-224. doi: 10.1016/j.jseaes.2013.01.016 |
[51] | 陈旭, 张元动, 樊隽轩, 等.赣南奥陶纪笔石地层序列与广西运动[J].中国科学(D辑), 2010, 40:1621-1631. |
[52] | 陈旭, 张元动, 樊隽轩, 等.广西运动的进程:来自生物相和岩相带的证据[J].中国科学(D辑), 2012, 42:1621-1631. |
[53] | 陈世悦, 李聪, 张鹏飞, 等.江南-雪峰地区加里东期和印支期不整合分布规律[J].中国地质, 2011, 35(8):1212-1219. |
[54] | Pearce J A, Harris N B W, Tindle A G.Trace element discrimination diagrams for the tectonic interpretation of granitic rock[J]. Journal of Petrology, 1984, 25(4):956-983. doi: 10.1093/petrology/25.4.956 |
[55] | Zhao K D, Jiang S Y, Sun T, et al. Zircon U-Pb dating, trace element and Sr-Nd-Hf isotope geochemistry of Paleozoic granites in the Miao' ershan-Yuechengling batholith, South China:implication for petrogenesis and tectonic-magmatic evolution[J]. Journal of Asian Earth Sciences, 2013, 74:244-264. doi: 10.1016/j.jseaes.2012.12.026 |
① | 广西壮族自治区地质局. 1: 200000桂林幅区域地质测量报告. 1969. |
Geological map of the Xinzhai pluton (a) and schematic map showing the distribution of Early Paleozoic granites in South China (b)
U-Pb concordia diagram (a) and weight mean diagram (b) of representative zircons from the Xinzhai granites
SiO2 versus K2O diagram (a) and A/CNK versus A/NK diagram (b) for the Xinzhai granites
Chondrite-normalized REE patterns (a, c, e) and primitive mantle-normalized multi-element diagrams (b, d) of the Xinzhai granites and the Paleozoic granites in Nanling Mountains, as well as Wuyi-Yunkai area
(87Sr/86Sr)i-ε Nd(t) and t-ε Nd(t) diagrams of the Xinzhai intrusive rocks
Frequency diagrams for Hf(t) (a) and TDM2 ages (b) of the zircons from the Xinzhai granites
Al2O3/TiO2-CaO/Na2O (a), Rb/Sr-Rb/Ba (b) and CaO/ (MgO+TFeO)-Al2O3/(MgO+TFeO)(c) diagrams for the Xinzhai granites
(Yb+Ta) -Rb(a)and Y-Nb(b)diagrams for the Xinzhai granites