滇西北衙煌斑岩的岩石成因及动力学背景:年代学、地球化学及Sr-Nd-Pb-Hf同位素约束

和文言; 莫宣学; 喻学惠; 董国臣; 和中华; 黄雄飞; 李小伟; 姜丽莉

滇西北衙煌斑岩的岩石成因及动力学背景:年代学、地球化学及Sr-Nd-Pb-Hf同位素约束

- 1.
  中国地质大学地质过程与矿产资源国家重点实验室, 地球科学与资源学院, 北京 100083
- 2.
  云南黄金矿业集团股份有限公司, 昆明 650224
基金项目:
本文受国家重点基础研究发展计划项目(2015CB452605、2009CB421002)、中国地质调查局地质调查工作项目(132120114013501)、地质过程与矿产资源国家重点实验室开放基金(GPMR2011)、国土资源部公益性行业科研专项(200911007-3)、中国博士后科学基金(2014M550081)和国家自然科学基金项目(41403028)联合资助。

收稿日期: 2014-03-05

修回日期: 2014-06-10

刊出日期: 2014-11-30

Genesis and geodynamic settings of lamprophyres from Beiya, western Yunnan: Constraints from geochemistry, geochronology and Sr-Nd-Pb-Hf isotopes

- 1.
  State Key Laboratory of Geological Processes and Mineral Resources, School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
- 2.
  Yunnan Gold and Mining Group Co., Ltd, Kunming 650224, China

Received Date: 05 March 2014

Revised Date: 10 June 2014

Publish Date: 30 November 2014

摘要

摘要: 北衙地区出露有多条煌斑岩脉,锆石LA-ICP-MS定年表明岩脉的侵位时间为34.96±0.66Ma,与滇西地区新生代岩浆活动的高峰期一致.岩石地球化学分析表明北衙煌斑岩具有高钾(K2O/Na2O为1.03~10.38)、富碱((K2O+Na2O)(平均7.55%)、高Mg#(30~73),富集大离子亲石元素(LILE)(K、Rb、Ba)和轻稀土元素(LREE),亏损高场强元素(HFSE)和重稀土元素的特征.同位素以高(87Sr/86Sr)i(0.70615~0.70825),低εNd(t)(-5.3~-1.3),富集放射性Pb(208Pb/204Pb=38.542~38.856,207Pb/204Pb=15.553~15.617,206Pb/204Pb=18.482~18.612)为特征,176Hf/177Hf为0.282631~0.282882,εHf(t)为-4.2~1.8.岩石地球化学和同位素特征表明该煌斑岩源自经俯冲板片交代富集了的岩石圈地幔,推测源区可能为含金云母的尖晶石相橄榄岩地幔与石榴石相橄榄岩地幔的过渡区,起源深度大致在75~85km,明显高于同区富碱斑岩的起源深度.构造和地球动力学背景分析表明,该煌斑岩以及滇西地区新生代岩浆作用都是对印度-欧亚大陆强烈碰撞的响应,都产在强烈伸展的动力学背景下,为岩石圈减薄的产物.
- 煌斑岩 /
- 地球化学 /
- 年代学 /
- Sr-Nd-Pb-Hf同位素 /
- 滇西北衙
Abstract: Quite a few lamprophyre dikes are developed in Beiya area. Zircon LA-ICP-MS U-Pb dating yields an age of 34.96±0.66Ma, which indicate it is the product of Cenozoic magmatism in the Jinshajiang-Ailaoshan alkali-rich intrusion belt. Geochemically, the lamprophyres have high values of potassium (K2O/Na2O ratio ranging from 1.03 to 10.38), alkaline (the content of (K2O+Na2O) mean value 7.55%) and Mg# (from 30 to 73) and are enriched in large ion lithophile elements (K, Rb, Ba) and LREEs and depleted in the high field strength elements (Nb, Zr, P) and HREE. The isotopes of lamprophyres are characterized by high (87Sr/86Sr)i (from 0.707615 to 0.708525), low εNd(t) (from -5.3 to -1.3) but enriched radioactive Pb (208Pb/204Pb=38.542~38.856, 207Pb/204Pb=15.553~15.617, 206Pb/204Pb=18.482~18.612). The ratios of 176Hf/177Hf range from 0.282631 to 0.282882, with εHf(t) values varying from -4.2 to 1.8. Based on the above discussions, we proposed that the studied lamprophyres are from an enrichment lithospheric mantle source which is metasomatized by the fluid from the dehydration of the subducted oceanic (Paleo-Tethys Ocean) slab. There is fractionation of olivine and clinopyroxene with the primary magma ascent, but without much influence. Tectonic and geodynamic investigation indicates that the studied lamprophyres are formed in a post-orogenic extensional setting after the collision between the collision between Indian and Eurasian plate.
- Lamprophyres /
- Geochemistry /
- Geochronology /
- Sr-Nd-Pb-Hf isotopes /
- Beiya, western Yunnan

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参考文献(53)

[1]	Bi XW, Hu RZ, Peng JT, Wu KX, Su WC and Zhan ZX. 2005. The geochemistry characteristics of the Yao'an and Machangqing alkaline-rich intrusions. Acta Petrologica Sinica, 21(1): 113-124 (in Chinese with English abstract)
[2]	Bird P. 1979. Continental delamination and the Colorado Plateau. Journal of Geophysical Research, 84(B13): 7561-7571
[3]	Chung SL, Lee TY, Lo CH, Wang PL, Chen CY, Nguyen TY, Tran TH and Wu GY. 1997. Intraplate extension prior to continental extrusion along the Ailao Shan-Red River shear zone. Geology, 25(4): 311-314
[4]	Chung SL, Lo CH, Lee TY, Zhang YQ, Xie YW, Li XH and Wang KL. 1998. Diachronous uplift of the Tibetan Plateau starting 40Myr ago. Nature, 394(B13): 769-773
[5]	Deng J, Yang LQ, Ge LS, Yuan SS, Wang QF, Zhang J, Gong QJ and Wang CM. 2010. Character and post-ore changes, modifications and preservation of Cenozoic alkali-rich porphyry gold metallogenic system in western Yunnan, China. Acta Petrologica Sinica, 26(6): 1633-1645 (in Chinese with English abstract)
[6]	Deng J, Wang CM and Li GJ. 2012. Style and process of the superimposed mineralization in the Sanjiang Tethys. Acta Petrologica Sinica, 28(5): 1349-1361 (in Chinese with English abstract)
[7]	Deng J, Wang QF, Li GJ, Li CS and Wang CM. 2014a. Tethys tectonic evolution and its bearing on the distribution of important mineral deposits in the Sanjiang region, SW China. Gondwana Research, 26(2): 419-437
[8]	Deng J, Wang QF, Li GJ and Santosh M. 2014b. Cenozoic tectono-magmatic and metallogenic processes in the Sanjiang region, southwestern China. Earth-Science Reviews, doi: 10.1016/j.earscirev.2014.05.015
[9]	DePaolo DJ and Wasserburg GJ. 1979. Inferences about magma sources and mantle structure from variations of ¹⁴³Nd/¹⁴⁴Nd. Geophys. Res. Lett., 3(12): 743-746
[10]	England P and Houseman GA. 1989. Extension during continental convergence, with application to the Tibetan Plateau. Journal of Geophysical Research, 94(B12): 17561-17579
[11]	Furman T and Graham D. 1999. Erosion of lithospheric mantle beneath the East African Rift system: Geochemical evidence from the Kivu volcanic province. Developments in Geotectonics, 24: 237-262
[12]	Gao S, Liu XM, Yuan HL, Hattendorf B, Günther D, Chen L and Hu SH. 2002. Determination of forty-two major and trace elements in USGS and NIST SRM glasses by laser ablation-inductively coupled plasma-Mass Spectrometry. Geostandards Newsletter, 26(2): 191-196
[13]	Geng JZ, Zhang J, Li HK, Li HM, Zhang YQ and Hao S. 2012. Ten-micron-sized zircon U-Pb dating using LA-MC-ICP-MS. Acta Geoscientica Sinica, 33(6): 877-884 (in Chinese with English abstract)
[14]	Griffin WL, Belousova EA and Shee S. 2004. Crustal evolution in the northern Yiliarn Craton: U-Pb and Hf iotope evidence from detrital zircon. Precambrian Research, 131: 231-282
[15]	Göğüs OH and Pysklywec RN. 2008. Near-surface diagnostics of dripping or delaminating lithosphere. Journal of Geophysical Research, 113: B11404, doi: 10.1029/2007JB00512
[16]	Guan T, Huang ZL, Xu C, Zhang ZL, Yang ZF and Chen M. 2006. ⁴⁰Ar-³⁹Ar dating and geochemical characteristics of lamprophyres in the Baimazhai nickel deposit, Yunnan Province. Acta Petrologica Sinica, 22(4): 873-883 (in Chinese with English abstract)
[17]	Guo ZF, Hertogen J, Liu JQ, Pasteels P, Boven A, Punzalan L, He HY, Luo XJ and Zhang WH. 2005. Potassic magmatism in western Sichuan and Yunnan provinces, SE Tibet, China: Petrological and geochemical constraints on petrogenesis. Journal of Petrology, 46(1): 33-78
[18]	Hart SR. 1989. Heterogeneous mantle domains: Signatures, genesis and mixing chronologies. Earth and Planetary Science Letters, 90(3): 273-296
[19]	He WY, Mo XX, Yu XH, He ZH, Li Y, Huang XK and Sun GS. 2012. Genetic types and the relationship between alkali-rich intrusion and mineralization of Beiya gold-polymetallic ore field, western Yunnan Province, China. Acta Petrologica Sinica, 28(5): 1401-1412 (in Chinese with English abstract)
[20]	He WY, Yu XH, Mo XX, He ZH, Dong GC, Liu XB, Su GS and Huang XF. 2013. Zircon U-Pb and molybdenite Re-Os dating for the Beiya gold-polymetallic deposit in the western Yunnan Province and its geological significance. Acta Petrologica Sinica, 29(4): 1301-1310 (in Chinese with English abstract)
[21]	He ZH, Zhou YM, He WY, Su GS, Li WH and Yang SW. 2013. Genetic types and metallogenic regularity of Beiya super-large gold-polymetallic deposit, northwestern Yunnan. Mineral Deposits, 32(2): 244-258 (in Chinese with English abstract)
[22]	Hoskin PWO and Schaltegger U. 2003. The composition of zircon and igneous and metamorphic petrogenesis. Reviews in Mineralogy and Geochemistry, 53(1): 27-62
[23]	Hou ZQ, Ma HW, Khin Z et al. 2003. The Himalayan Yulong porphyry copper belt: Product by large-scale strike-slip faulting in Eastern Tibet. Economic Geology, 98(1): 125-145
[24]	Hou ZQ, Pan GT, Wang AJ, Mo XX, Tian SH, Sun XM, Ding L, Wang EQ, Gao YF, Xie YL, Zeng PS, Qin KZ, Xu JF, Qu XM, Yang ZM, Yang ZS, Fei HC, Meng XJ and Li ZQ. 2006. Metallogenesis in Tibetan collisional orogenic belt.Ⅱ: Mineralization in late-collisional transformation setting. Mineral Deposits, 25(5): 521-543 (in Chinese with English abstract)
[25]	Hou ZQ, Zaw K, Pan GT, Mo XX, Hu YZ and Li XZ. 2007. Sanjiang Tethyan metallogenesis in S.W. China: Tectonic setting, metallogenic epochs and deposit types. Ore Geology Reviews, 31(1-4): 48-87
[26]	Houseman GA, McKenzie DP and Molnar P. 1981. Convective instability of a thickened boundary layer and its relevance for the thermal evolution of continental convergent belts. Journal of Geophysical Research, 86(B7): 6115-6132
[27]	Houseman GA and Molnar P. 1997. Gravitational (Rayleigh-Taylor) instability of a layer with non-linear viscosity and convective thinning of continental lithosphere. Geophysical Journal International, 128(1): 125-150
[28]	Huang XL, Niu YL, Xu YG, Chen LL and Yang QJ. 2010. Mineralogical and geochemical constraints on the petrogenesis of post-collisional potassic and ultrapotassic rocks from western Yunnan, SW China. Journal of Petrology, 51(21): 1617-1654
[29]	Jacobson SB and Wasserburg GJ. 1980. Sm-Nd isotopic evolution of chondrites. Earth and Planetary Science Letters, 50(1): 139-155
[30]	Jiang YH, Jiang SY, Zhao KD, Ni P, Ling HF and Liu DY. 2005. SHRIMP U-Pb zircon dating for lamprophyre from Liaodong Peninsula: Constraints on the initial time of Mesozoic lithosphere thinning beneath eastern China. Chinese Science Bulletin, 50(19): 2161-2168 (in Chinese)
[31]	Kay RW and Kay SM. 1993. Delamination and delamination magmatism. Tectonophysics, 219(1-3): 177-189
[32]	Klemme S and O'Neill HSC. 2000. The near-solidus transition from garnet lherzolite to spinel lherzolite. Contributions to Mineralogy and Petrology, 138(3): 237-248
[33]	Knudsen TL, Griffin WL, Hartz EH, Andresen A and Jackson S. 2001. In-situ hafnium and lead isotope analyses of detrital zircons from the Devonian sedimentary basin of NE Greenland: A record of repeated crustal reworking. Contributions to Mineralogy and Petrology, 141(1): 83-94
[34]	LaTourrette T, Hervig RL and Holloway JR. 1995. Trace element partitioning between amphibole, phlogopite, and basanite melt. Earth and Planetary Science Letters, 135(1-4): 13-30
[35]	Leloup PH, Lacassin R, Tapponnier P, Scharer U, Zhong DL, Liu XH, Zhang LS, Ji SC and Trinh PT. 1995. The Ailao Shan-Red River shear zone (Yunnan, China): Tertinary transform boundary of Indochina. Tectonophysics, 251(1-4): 3-84
[36]	Li CF, Li XH, Guo JH, Li XH, Li HK, Zhou HY and Li GZ. 2011. Single-step separation of Rb-Sr and Pb from minor rock samples and high precision determination using thermal ionization mass spectrometry. Geochimica, 40(5): 399-406 (in Chinese with English abstract)
[37]	Li HK, Zhu SX, Xiang ZQ, Su WB, Lu SN, Zhou HY, Geng JZ, Li S and Yang FJ. 2010. Zircon U-Pb dating on tuff bed from Gaoyuzhuang Formation in Yanqing, Beijing: Further constraints on the new subdivision of the Mesoproterozoic stratigraphy in the northern North China. Acta Petrologica Sinica, 26(7): 2131-2140 (in Chinese with English abstract)
[38]	Li XH, Zhou HW, Wei GJ. Liu Y, Chung SL, Luo QH and Li JY. 2002. Geochemistry and Sr-Nd isotopes of Cenozoic ultrapotassic lamprophyres in western Yunnan: Constraints on the composition of sub-continental lithospheric mantle. Geochimica, 31(1): 26-34 (in Chinese with English abstract)
[39]	Li Y. 2012. Geochronology, petrogenesis and geological significance of the Cenozoic potassic magmatic rocks in Sanjiang area, western Yunnan. Ph. D. Dissertation. Beijing: China University of Geosciences (in Chinese with English summary)
[40]	Liu FT, Liu JH, He JK and You QY. 2000. The subducted slab of Yangtze continental beneath the Tethyan orogeny in western Yunnan. Chinese Science Bulletin, 45(1): 79-83 (in Chinese)
[41]	Liu YS, Hu ZC, Gao S, Günther D, Xu J, Gao CG and Chen HH. 2008. In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard. Chemical Geology, 257(1-2): 34-43
[42]	Lu YJ, Kerrich R, Cawood PA, McCuaig TC, Hart CJR, Li ZX, Hou ZQ and Bagas L. 2012. Zircon SHRIMP U-Pb geochronology of potassic felsic intrusions in western Yunnan, SW China: Constraints on the relationship of magmatism to the Jinsha suture. Gondwana Research, 22(2): 737-747
[43]	Luo ZH, Wei Y, Xin HT, Zhan HM, Ke S and Li WT. 2006. Petrogenesis of the post-orogenic dike complex: Constraints to lithosphere delamination. Acta Petrologica Sinica, 22(6): 1672-1684 (in Chinese with English abstract)
[44]	Luo ZH, Lu XX, Wang BZ, Chen BH, Huang F, Yang ZF and Wang Y. 2008. Post-orogenic dike complexes and implications for metallogenesis. Earth Science Frontiers, 15(4): 1-12 (in Chinese with English abstract)
[45]	Ludwig KR. 2003. ISOPLOT 3.00: A Geochronological Toolkit for Microsoft Excel. Berkeley Geochronology Center Special Publication, 1-70
[46]	McKenzie D and O'Nions RK. 1991. Partial melt distributions from inversion of rare earth element concentrations. Journal of Petrology, 32(5): 1021-1091
[47]	Middlemost EAK. 1994. Naming materials in the magma/igneous rock system. Earth-Science Reviews, 37(3-4): 215-224
[48]	Miller C, Schuster R, Klotzli U, Frank W and Purtscheller F. 1999. Post-collision potassic and ultrapotassic magmatism in SW Tibet: Geochemnical and Sr-Nd-Pr-O isotopic constrains for mantle source characteristic and petrogenesis. Journal of Petrology, 40(9): 1399-1424
[49]	Mo XX, Lu FX, Shen SY et al. 1993. Volcanism and Metallogenesis of Sanjiang Tethy. Beijing: Geological Publishing House, 1-267 (in Chinese with English abstract)
[50]	Mo XX, Hou ZQ, Niu YL, Dong GC, Qu XM, Zhao ZD and Yang ZM. 2007. Mantle contributions to crustal thickening during continental collision: Evidence from Cenozoic igneous rocks in southern Tibet. Lithos, 96(1-2): 225-242
[51]	Olafsson M and Eggler DH. 1983. Phase relations of amphibole, amphibole-carbonate and phlogopite-carbonate peridotite: Petrological constrains on the asthenosphere. Earth and Planetary Science Letters, 64(2): 305-315
[52]	Robinson JAC and Wood BJ. 1998. The depth of the spinel to garnet transition at the peridotite solidus. Earth and Planetary Science Letters, 164(1-2): 277-284
[53]	Rock N敍猀攀?眀椀琀栀??渀最氀椀猀栀?愀戀猀琀爀愀挀琀??戀爀?娀栀愀渀最?夀儀??堀椀攀?夀圀???椀?堀???儀椀甀??一??娀栀愀漀?娀????椀愀渀最??夀?愀渀搀?娀栀漀渀最?匀????　　　???栀爀漀渀漀氀漀最礀?愀渀搀?一搀?匀爀?椀猀漀琀漀瀀攀猀?漀昀?琀栀攀??椀氀愀漀猀栀愀渀??椀渀猀栀愀樀椀愀渀最?愀氀欀愀氀椀?爀椀挀栀?椀渀琀爀甀猀椀漀渀??匀挀椀攀渀挀攀?椀渀??栀椀渀愀??匀攀爀椀攀猀??????　??????????????椀渀??栀椀渀攀猀攀??戀爀?娀栀愀漀?堀??夀甀?堀????漀?堀堀??娀栀愀渀最???愀渀搀??????????堀???　　???倀攀琀爀漀氀漀最椀挀愀氀?愀渀搀?最攀漀挀栀攀洀椀挀愀氀?挀栀愀爀愀挀琀攀爀椀猀琀椀挀猀?漀昀??攀渀漀稀漀椀挀?愀氀欀愀氀椀?爀椀挀栀?瀀漀爀瀀栀礀爀椀攀猀?愀渀搀?砀攀渀漀氀椀琀栀猀?栀漀猀琀攀搀?椀渀?眀攀猀琀攀爀渀?夀甀渀渀愀渀?倀爀漀瘀椀渀挀攀???攀漀猀挀椀攀渀挀攀??????????????????椀渀??栀椀渀攀猀攀?眀椀琀栀??渀最氀椀猀栀?愀戀猀琀爀愀挀琀??戀爀?娀栀漀渀最??????椀渀最?????椀甀??吀???椀甀?????娀栀愀渀最??????椀??儀?愀渀搀??栀攀渀?????　　　???甀氀琀椀?漀爀椀攀渀琀攀搀?愀渀搀?氀愀礀攀爀攀搀?猀琀爀甀挀琀甀爀攀猀?漀昀?氀椀琀栀漀猀瀀栀攀爀攀?椀渀?漀爀漀最攀渀椀挀?戀攀氀琀?愀渀搀?琀栀攀椀爀?攀昀昀攀挀琀猀?漀渀??攀渀漀稀漀椀挀?洀愀最洀愀琀椀猀洀????挀愀猀攀?猀琀甀搀礀?漀昀?眀攀猀琀攀爀渀?夀甀渀渀愀渀?愀渀搀?匀椀挀栀甀愀渀???栀椀渀愀??匀挀椀攀渀挀攀?椀渀??栀椀渀愀??匀攀爀椀攀猀??????　?匀甀瀀瀀氀??????????椀渀??栀椀渀攀猀攀??戀爀?娀椀渀搀氀攀爀???愀渀搀??愀爀琀?匀刀?????????栀攀洀椀挀愀氀?最攀漀搀礀渀愀洀椀挀猀??渀渀甀愀氀?刀攀瘀椀攀眀?漀昀??愀爀琀栀?愀渀搀?倀氀愀渀攀琀愀爀礀?匀挀椀攀渀挀攀猀??????????????戀爀???晳??庀??洀?????T瑟???螂蕥????????　　????襙豛汔芚道???敏?卜葏ぶ??晓祛腲????晷??????????????????戀爀?錀鮐??栀????嬀澄???脀?繘??謀虳????奟??騀蚟灞??謀罳????　?　???置??酸?譜?????祾腲????塏????晷????????????????????戀爀?錀鮐??謀罳???一驧????　?????彎祬?????屷??????????晷????????????????????戀爀??????敟?一g摠?一???????????　?????　?洃????啷?倀戀琀葞蒟????????倀??匀?驭??　?晴??????????????????戀爀??魻???窞饦???????????─赎????????　　???鄀坎絓汶?????酱??猀甀瀀??　??猀甀瀀??爀??猀甀瀀?????猀甀瀀??爀騀瑛豞ご??晓祛腲????晷??????????????????戀爀?谀蝔e???晕????晛??谀?乎??一??????????????　?????置?奓??庑｜ぷ?詷?策譼?癓???酸?獜???????晷????????????　???????戀爀?谀蝔e???晕????晛??谀?乎??挀????卒?????????????　?????置?奓???庑｜詷??啷?倀戀谀襔??剷攀?伀猀琀葞?癓け???????晷????????????　?????　?戀爀?谀?乎??栀酔??谀蝔e???????一?乎??栀?蝾???　?????置?奓薈?譙???庑｜詷?策譼????讉???詷ぞ??????????????????戀爀??鹏???堀???謀襳?????晛??　????夀卛???ā靎??謀豳?????ぬ???覌????湦???????????卦???栀????栀不?????楾??开敛???一?????　　???刀??龚?鹸?熐???愀娡?鹸汤抏??屷????詷ぞ??????????????????戀爀??Y覀??謀?豜??甀疍????縷????????晒e???　　??????魓?酱?卜?刀??倀??啷?倀戀琀葞?癓陋???????葑????蒕?????晹?????　????????????????戀爀?一湧???一?乳???沐襥??一?襔??一g摠??栀????一?恖???　???????????剎戀?匀爀谀偔戀

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滇西北衙煌斑岩的岩石成因及动力学背景:年代学、地球化学及Sr-Nd-Pb-Hf同位素约束

Genesis and geodynamic settings of lamprophyres from Beiya, western Yunnan: Constraints from geochemistry, geochronology and Sr-Nd-Pb-Hf isotopes

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