Geochronological and Geochemical Constraints on the Petrogenesis of Permian Dolerite Dyke Swarms in the Beishan Orogenic Belt, NW China

Extensive Early Permian mafic-ultramafic intrusions, doleritic dykes, and basalts crop out within the Beishan area, southern Central Asian Orogenic Belt (CAOB). We present new geochronological and geochemical data for Gubaoquan dolerite dyke swarms in the Beishan orogenic belt. Zircon U-Pb Dating of the Gubaoquan dykes indicates that they were emplaced during the Early Permian (280.7 ± 4 Ma), that was coeval with Yinaoxia and Podong mafic dykes in Beishan area. The dykes are characterized by low Mg# (47–84) in the clinopyroxene crystals, and the content of whole-rock Fe2O3 (t), MgO, and alkali (Na2O + K2O) range from 12.5–17.4, 4.06–5.51, and 2.8–4.4 wt.%, respectively. The samples from the Gubaoquan dykes have high and variable Ba/La (5.93–14.2) and Ba/Nb (15.0–37.3) ratios but low Th/Yb (0.17–0.24) ratios. The rocks show slightly enrichments in LREE, HFSE, Th, and Hf, and depletion in Nb and Ta. The εNd (t = 280 Ma) values and initial 87Sr/86Sr ratios of the Gubaoquan dykes show variations ranging from 6.4 to 6.8 and 0.706240 to 0.707546, respectively. These data suggest that the parental magmas for the Gubaoquan dykes were probably derived from partially decompressed melting of upwelling depleted asthenosphere mantle that was metasomatized previously by subducted fluids.

[1]  Wengang Liu,et al.  Early–Middle Permian post-collisional granitoids in the northern Beishan orogen, northwestern China: evidence from U–Pb ages and Sr–Nd–Hf isotopes , 2020, Canadian Journal of Earth Sciences.

[2]  W. Xiao,et al.  Deep Structure and Metallogenic Processes of the Altai‐Junggar‐Tianshan Collage in Southern Altaids , 2019, Acta Geologica Sinica - English Edition.

[3]  Qingfei Wang,et al.  Data for: Geochronology, petrology and Sr-Nd-Hf-S isotope geochemistry of the newly-discovered Qixin magmatic Ni-Cu sulfide prospect, southern Central Asian Orogenic Belt, NW China , 2019 .

[4]  Tan Xijuan,et al.  In situ U-Pb dating and trace element determination of standard zircons by LA-ICP-MS , 2019 .

[5]  A. Nutman,et al.  Continental origin of the Gubaoquan eclogite and implications for evolution of the Beishan Orogen, Central Asian Orogenic Belt, NW China , 2017 .

[6]  A. Crawford,et al.  The geology, geochemistry and Ni-Cu-PGE potential of mafic-ultramafic bodies associated with the Dido Batholith, North Queensland, Australia , 2017 .

[7]  Xinghe Yu,et al.  Petrogenetic model of the Permian Tarim Large Igneous Province , 2017, Science China Earth Sciences.

[8]  W. Xiao,et al.  A Silurian-early Devonian slab window in the southern Central Asian Orogenic Belt: Evidence from high-Mg diorites, adakites and granitoids in the western Central Beishan region, NW China , 2016 .

[9]  K. Qin,et al.  A non-plume model for the Permian protracted (266-286 Ma) basaltic magmatism in the Beishan-Tianshan region, Xinjiang, Western China , 2016 .

[10]  C. Yuan,et al.  Permian doleritic dikes in the Beishan Orogenic Belt, NW China: Asthenosphere–lithosphere interaction in response to slab break-off , 2015 .

[11]  R. Klemd,et al.  Metamorphic evolution of (ultra)-high-pressure subduction-related transient crust in the South Tianshan Orogen (Central Asian Orogenic Belt): Geodynamic implications , 2015 .

[12]  R. Klemd,et al.  A common high-pressure metamorphic evolution of interlayered eclogites and metasediments from the 'ultrahigh-pressure unit' of the Tianshan metamorphic belt in China , 2015 .

[13]  Qingpeng Meng,et al.  Geochronology and geochemistry of late Paleozoic magmatic rocks in the Yinwaxia area, Beishan: Implications for rift magmatism in the southern Central Asian Orogenic Belt , 2014 .

[14]  Yigang Xu,et al.  Plume-lithosphere interaction in the generation of the Tarim large igneous province, NW China: Geochronological and geochemical constraints , 2014, American Journal of Science.

[15]  Tao Wang,et al.  Early Permian post-collisional high-K granitoids from Liuyuan area in southern Beishan orogen, NW China: Petrogenesis and tectonic implications , 2013 .

[16]  Yu Deng,et al.  Syncollisional tholeiitic magmatism induced by asthenosphere upwelling owing to slab detachment at the southern margin of the Central Asian Orogenic Belt , 2013, Journal of the Geological Society.

[17]  R. Hu,et al.  Zircon U-Pb age, geochemical, and Sr-Nd-Hf isotopic constraints on the origin of mafic dykes in the Shaanxi Province, North China Craton, China , 2013 .

[18]  Qingpeng Meng,et al.  Late Paleozoic subduction system in the southern Central Asian Orogenic Belt: Evidences from geochronology and geochemistry of the Xiaohuangshan ophiolite in the Beishan orogenic belt , 2013 .

[19]  C. Yuan,et al.  Late Ordovician to early Devonian adakites and Nb-enriched basalts in the Liuyuan area, Beishan, NW China: Implications for early Paleozoic slab-melting and crustal growth in the southern Altaids , 2012 .

[20]  Yu Deng,et al.  Geochemistry and petrogenetic implications of a Late Devonian mafic–ultramafic intrusion at the southern margin of the Central Asian Orogenic Belt , 2012 .

[21]  L. Liu,et al.  Geochronology of multi-stage metamorphic events: Constraints on episodic zircon growth from the UHP eclogite in the South Altyn, NW China , 2012 .

[22]  Ping Liu,et al.  Geochronologic-petrochemical studies of the Hongshishan mafic–ultramafic intrusion, Beishan area, Xinjiang (NW China): petrogenesis and tectonic implications , 2012 .

[23]  Li Xiangmin,et al.  The age of Niujuanzi ophiolite in Beishan area of Gansu Province and its geological significance , 2012 .

[24]  Yan Qiao-juan.  Zircon U-Pb ages of Huitongshan and Zhangfangshan ophiolite in Beishan of Gansu-Inner Mongolia border area and their significance , 2012 .

[25]  Li Xiangmin,et al.  Geochronology of Jijitaizi ophiolite in Beishan area,Gansu Province,and its geological significance , 2012 .

[26]  A. Crawford,et al.  Slab break-off and the formation of Permian mafic-ultramafic intrusions in southern margin of Central Asian Orogenic Belt, Xinjiang, NW China , 2011 .

[27]  Zhaojie Guo,et al.  Geochronology, geochemistry and petrogenesis of mafic and ultramafic rocks from Southern Beishan area, NW China: Implications for crust–mantle interaction , 2011 .

[28]  Ping Liu,et al.  U-Pb ages and Hf-O isotopes of zircons from Late Paleozoic mafic-ultramafic units in the southern Central Asian Orogenic Belt: Tectonic implications and evidence for an Early-Permian mantle plume , 2011 .

[29]  Yong‐Fei Zheng,et al.  Geochemical constraints on the nature of mantle source for Cenozoic continental basalts in east-central China , 2011 .

[30]  Ping Liu,et al.  SIMS zircon U-Pb geochronology and Sr-Nd isotopes of Ni-Cu-Bearing Mafic-Ultramafic Intrusions in Eastern Tianshan and Beishan in correlation with flood basalts in Tarim Basin (NW China): Constraints on a ca. 280 Ma mantle plume , 2011, American Journal of Science.

[31]  Chunming Han,et al.  A review of the western part of the Altaids: A key to understanding the architecture of accretionary orogens , 2010 .

[32]  W. Xiao,et al.  Geochronology and geochemistry of Early Permian mafic–ultramafic complexes in the Beishan area, Xinjiang, NW China: Implications for late Paleozoic tectonic evolution of the southern Altaids , 2010 .

[33]  B. Song,et al.  Age, geochemistry, and tectonic implications of a late Paleozoic stitching pluton in the North Tian Shan suture zone, western China , 2010 .

[34]  Z. Tao.  Source,evolution and tectonic setting of the basalts from the native copper mineralization area in eastern Tianshan,Xinjiang , 2010 .

[35]  Han Chunming,et al.  Discovery of Middle Silurian adakite granite and its tectonic significance in Liuyuan area,Beishan Moutains,NW China , 2010 .

[36]  Mei Zhou,et al.  OIB-like, heterogeneous mantle sources of Permian basaltic magmatism in the western Tarim Basin, NW China: Implications for a possible Permian large igneous province , 2009 .

[37]  Xian‐Hua Li,et al.  Role of mantle-derived magma in genesis of early Yanshanian granites in the Nanling Range, South China: in situ zircon Hf-O isotopic constraints , 2009 .

[38]  R. Metcalf,et al.  Suprasubduction-zone ophiolites: Is there really an ophiolite conundrum? , 2008 .

[39]  P. Kelemen,et al.  Recycled crust controls contrasting source compositions of Mesozoic and Cenozoic basalts in the North China Craton , 2008 .

[40]  Min Sun,et al.  Middle Cambrian to Permian subduction-related accretionary orogenesis of Northern Xinjiang, NW China: Implications for the tectonic evolution of central Asia , 2008 .

[41]  M. Whitehouse,et al.  Plesovice zircon : A new natural reference material for U-Pb and Hf isotopic microanalysis , 2008 .

[42]  Zhang Yuan.  Accurate constraint on formation and emplacement age of Hongltuhe ophiolite,boundary region between Xinjiang and Gansu Provinces and its tectonic implications. , 2008 .

[43]  J. Pearce.  Geochemical fingerprinting of oceanic basalts with applications to ophiolite classification and the search for Archean oceanic crust , 2008 .

[44]  Brian F. Windley,et al.  Tectonic models for accretion of the Central Asian Orogenic Belt , 2007, Journal of the Geological Society.

[45]  B. Windley,et al.  Accretionary growth and crust formation in the Central Asian Orogenic Belt and comparison with the Arabian-Nubian shield , 2007 .

[46]  By,et al.  Paleozoic structural and geodynamic evolution of eastern Tianshan (NW China): welding of the Tarim and Junggar plates , 2007 .

[47]  J. Koepke,et al.  Effect of water on tholeiitic basalt phase equilibria: an experimental study under oxidizing conditions , 2006 .

[48]  Wu Han-quan.  Neoproterozoic eclogitic metamorphic age of the Beishan edogite of Gansu, China .Evidence from SHRIMP U-Pb isotope dating , 2006 .

[49]  Li Yu-jing.  Geological characteristic and tectonic environment of basic dike swarms in the Beishan area, southern Hami, Xinjiang, China. , 2006 .

[50]  Zhao Ze.  Comparative study on Permian basalts from eastern Xinjiang-Beishan area of Gansu province and its tectonic implications. , 2006 .

[51]  R. Stern,et al.  Geochemical mapping of the Mariana arc‐basin system: Implications for the nature and distribution of subduction components , 2005 .

[52]  P. Williams,et al.  Eocene shoshonitic mafic dykes intruding the Monashee Complex, British Columbia: a petrogenetic relationship with the Kamloops Group volcanic sequence? , 2005 .

[53]  M. Norman,et al.  Geochemical Evidence for Excess Iron in the Mantle Beneath Hawaii , 2004, Science.

[54]  Mei-Fu Zhou,et al.  Geochemistry and petrogenesis of 270 Ma Ni-Cu-(PGE) sulfide-bearing mafic intrusions in the Huangshan district, Eastern Xinjiang, Northwest China : implications for the tectonic evolution of the Central Asian Orogenic belt , 2004 .

[55]  Lianchang Zhang,et al.  Paleozoic accretionary and collisional tectonics of the Eastern Tianshan (China): Implications for the continental growth of Central Asia , 2004 .

[56]  Jiang Chang.  Petrogenesis and magma source of the ultramafic rocks at Wajilitag region, western Tarim Plate in Xinjiang. , 2004 .

[57]  Jiang Chang-yi.  Petrology, Geochemistry and Petrogenesis of the Kalpin Basalts and Their Nd, Sr and Pb Isotopic Compositions , 2004 .

[58]  B. Jahn.  The Central Asian Orogenic Belt and growth of the continental crust in the Phanerozoic , 2004, Geological Society, London, Special Publications.

[59]  R. Klemd.  Ultrahigh-pressure metamorphism in eclogites from the western Tianshan high-pressure belt (Xinjiang, western China)-Comment , 2003 .

[60]  R. Klemd,et al.  Formation of HP–LT rocks and their tectonic implications in the western Tianshan Orogen, NW China: geochemical and age constraints , 2003 .

[61]  K. Ludwig.  User's Manual for Isoplot 3.00 - A Geochronological Toolkit for Microsoft Excel , 2003 .

[62]  R. Rudnick,et al.  3.01 – Composition of the Continental Crust , 2003 .

[63]  A. Carroll,et al.  Permian sedimentary record of the Turpan-Hami basin and adjacent regions, northwest China: Constraints on postamalgamation tectonic evolution , 2002 .

[64]  S. Eggins,et al.  Hafnium isotope evidence for ‘conservative’ element mobility during subduction zone processes , 2001 .

[65]  Kazuya Takahashi,et al.  JNdi-1: a neodymium isotopic reference in consistency with LaJolla neodymium , 2000 .

[66]  Bin Chen,et al.  Massive granitoid generation in Central Asia: Nd isotope evidence and implication for continental growth in the Phanerozoic , 2000 .

[67]  J. Hoek,et al.  Continental mafic dyke swarms as tectonic indicators: an example from the Vestfold Hills, East Antarctica , 1995 .

[68]  M. Wiedenbeck.  An example of reverse discordance during ion microprobe zircon dating: An artifact of enhanced ion yields from a radiogenic labile Pb , 1995 .

[69]  W. McDonough,et al.  The composition of the Earth , 1995 .

[70]  A. Şengör,et al.  Evolution of the Altaid tectonic collage and Palaeozoic crustal growth in Eurasia , 1993, Nature.

[71]  M. Thirlwall.  Long-term reproducibility of multicollector Sr and Nd isotope ratio analysis , 1991 .

[72]  W. McDonough,et al.  Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes , 1989, Geological Society, London, Special Publications.

[73]  Nobuo Morimoto,et al.  Nomenclature of Pyroxenes , 1988, Mineralogical Magazine.

[74]  R. W. Le Maitre,et al.  A Chemical Classification of Volcanic Rocks Based on the Total Alkali-Silica Diagram , 1986 .

[75]  W. C. Gussow.  The Importance and Potential of Mafic Dyke Swarms in Studies of Geodynamic Processes , 1983 .

[76]  J. Kramers,et al.  Approximation of terrestrial lead isotope evolution by a two-stage model , 1975 .