Petrogenesis for Late Neoarchean Era High Magnesian Andesites in the Anshan-Benxi Area

doi:10.12068/j.issn.1005-3026.2022.05.019

Abstract

Abstract: The high magnesian andesites(HMAs)are first recognized from the Anshan-Benxi area， which comprise mineral assemblages of amphibole+plagioclase+mica+quartz+minor pyroxene. The Anshan-Benxi HMAs are interlayered with ~2.55~2.52Ga BIF and supracrustal rocks， therefore indicating that they are late Neoarchean products. Whole-rock major and trace geochemical results reveal that the Anshan-Benxi HMAs represent primary magmas with high MgO， Cr and Ni contents， low FeO_T/MgO ratios and calc-alkaline features， and are characterized by typical island arc compositions with strongly fractionated REE patterns and negative Nb-Ta-Ti anomalies. Besides， the Anshan-Benxi HMAs are geochemically analogous to ~2.7Ga HMA in the Wawa greenstone belt and Phanerozoic sanukoid HMA in the Setouchi. Taken together， the Anshan-Benxi HMAs are interpreted products of partial melting of mantle peridotites which are previously metasomatized by subducting slab released melts， consisting with a late Neoarchean subduction geodynamic setting in the Anshan-Benxi area.

Key words: Anshan-Benxi area; late Neoarchean era; high magnesian andesite; active plate margin; petrogenesis

CLC Number:

TP20

GUO Rong-rong， LI Zong-hui， HUANG Xiao. Petrogenesis for Late Neoarchean Era High Magnesian Andesites in the Anshan-Benxi Area[J]. Journal of Northeastern University(Natural Science), 2022, 43(5): 740-747.

References

[1]唐功建，王强.高镁安山岩及其地球动力学意义［J］.岩石学报，2010，26(8):2495-2512.(Tang Gong-jian，Wang Qiang.High-Mg andesites and their geodynamic implications［J］.Acta Petrologica Sinica，2010，26(8):2495-2512.)
[2]Kelemen P B，Yogodzinski G M，Scholl D W，et al.Along-strike variation in the Aleutian island arc:genesis of high Mg^# andesite and implications for continental crust［J］.American Geophysical Union Geophysical Monograph，2003，138:223-276.
[3]Polat A，Kerrich R.Magnesian andesites，Nb-enriched basalt-andesites，and adakites from Late-Archean ~2.7Ga Wawa greenstone belts，Superior Province，Canada:implications for late Archean subduction zone petrogenetic processes［J］.Contributions to Mineralogy and Petrology，2001，141(1):36-52.
[4]Liu S W，Wang M J，Wan Y S，et al.A reworked ~3.45Ga continental microblock of the North China Craton:constraints from zircon U-Pb-Lu-Hf isotopic systematics of the Archean Beitai-Waitoushan migmatite-syenogranite complex［J］.Precambrian Research，2017，303:332-354.
[5]Wan Y S，Ma M Z，Dong C Y，et al.Widespread late Neoarchean reworking of Meso-to Paleoarchean continental crust in the Anshan-Benxi area，North China Craton，as documented by U-Pb-Nd-Hf-O isotopes［J］.American Journal of Science，2015，315:620-670.
[6]Wang C L，Peng Z D，Tong X X，et al.Late Neoarchean supracrustal rocks from the Anshan-Benxi terrane，North China Craton:new geodynamic implications from the geochemical record［J］.American Journal of Science，2017，317(10):1095-1148.
[7]代堰锫，张连昌，王长乐，等.辽宁本溪歪头山条带状铁矿的成因类型、形成时代及构造背景［J］.岩石学报，2012，28(11):3574-3594.(Dai Yan-pei，Zhang Lian-chang，Wang Chang-le，et al.Genetic type，formation age and tectonic setting of the Waitoushan banded iron formation，Benxi，Liaoning province［J］.Acta Petrologica Sinica，2012，28(11):3574-3594.)
[8]Guo R R，Liu S W，Gong E P，et al.Arc-generated metavolcanic rocks in the Anshan-Benxi greenstone belt，North China Craton:constraints from geochemistry and zircon U-Pb-Hf isotopic systematics［J］.Precambrian Research，2017，303:228-250.
[9]崔培龙.鞍山-本溪地区铁建造型铁矿成矿构造环境与成矿、找矿模式研究［D］.长春:吉林大学，2014.(Cui Pei-long.Metallogenic tectonic setting，metallogenic and prospecting models for precambrian iron-formation in the Anshan-Benxi area［D］.Changchun:Jilin University，2014.)
[10]周士泰.鞍山-本溪地区条带状铁矿地质［M］.北京:地质出版社，1994:1-277.(Zhou Shi-tai.Geology of the BIF in Anshan-Benxi area［M］.Beijing:Geological Publishing House，1994:1-227.)
[11]万渝生，董春艳，颉颃强，等.鞍山-本溪地区鞍山群含BIF表壳岩形成时代新证据:锆石SHRIMP U-Pb定年［J］.地球科学，2018，43(1):57-81.(Wan Yu-sheng，Dong Chun-yan，Ji Hang-qiang，et al.Formation age of BIF-bearing Anshan group supracrustal rocks in Anshan-Benxi area:new evidence from SHRIMP U-Pb zircon dating［J］.Earth Science，2018，43(1):57-81.)
[12]Han C M，Xiao W J，Su B X，et al.Formation age and genesis of the Gongchangling Neoarchean banded iron deposit in eastern Liaoning province:constraints from geochemistry and SHRIMP zircon U-Pb dating［J］.Precambrian Research，2014，254:306-322.
[13]Li L X，Li H M，Liu M J，et al.Timing of deposition and tectonothermal events of banded iron formations in the Anshan-Benxi area，Liaoning province，China:evidence from SHRIMP U-Pb zircon geochronology of the wall rocks ［J］.Journal of Asian Earth Sciences，2016，129:276-293.
[14]Zhu M T，Dai Y P，Zhang L C，et al.Geochronology and geochemistry of the Nanfen iron deposit in the Anshan-Benxi area，North China Craton:implications for ～2.55Ga crustal growth and the genesis of high-grade iron ores［J］.Gondwana Research，2015，260:23-38.
[15]杨秀清.辽宁鞍山-本溪变质岩区铁成矿过程研究［D］.北京:中国地质大学(北京)，2013.(Yang Xiu-qing.Study on iron ore-forming process of metamorphic terrain in Anshan-Benxi area，Liaoning province，China［D］.Beijing:China University of Geosciences(Beijing)，2013.)
[16]代堰锫，张连昌，朱明田，等.鞍山陈台沟BIF 铁矿与太古代地壳增生:锆石U-Pb 年龄与Hf 同位素约束［J］.岩石学报，2013，29(7):2537-2550.(Dai Yan-pei，Zhang Lian-chang，Zhu Ming-tian，et al.Chentaigou BIF-type iron deposit，Anshan area associated with Archean crustal growth:constraints from zircon U-Pb dating and Hf isotope［J］.Acta Petrologica Sinica，2013，29(7):2537-2550.)
[17]Bao H，Liu S W，Wang M J，et al.Mesoarchean geodynamic regime evidenced from diverse granitoid rocks in the Anshan-Benxi area of the North China Craton［J］.Lithos，2020，366/367:105574.
[18]Le Bas M J，Le Maitre R W，Streckeisen A，et al.A chemical classification of volcanic rocks based on the total Alkali-Silica diagram［J］.Journal of Petrology，1986，27(3):745-750.
[19]Martin H，Smithies R H，Moyen J F，et al.An overview of adakite，tonalite-trondhjemite-granodiorite(TTG)，and sanukitoid:relationships and some implications for crust evolution［J］.Lithos，2005，79:1-24.
[20]Sun S S，McDonough W F.Chemical and isotopic systematics of oceanic basalts:implications for mantle composition and processes［J］.Geological Society，London，Special Publications，1989，42:313-345.
[21]Yogodzinski G M，Volynets O N，Koloskov A V，et al.Magnesian andesites and the subduction component in a strongly calc-alkaline series at Piip Volcano，far western Aleutians［J］.Journal of Petrology，1994，35(1):163-204.
[22]Tatsumi Y，Ishizaka K.Origin of high-magnesian andesites in the Setouchi volcanic belt，southwest Japan，I.Petrographical and chemical characteristics［J］.Earth and Planetary Science Letters，1982，60(2):293-304.
[23]Shimoda G，Tatsumi Y，Nohda S，et al.Setouchi high-Mg andesites revisited:geochemical evidence for melting of subducting sediments［J］.Earth and Planetary Science Letters，1998，160(3/4):479-492.
[24]Yogodzinski G M，Kay R W，Volynets O N，et al.Magnesian andesite in the western Aleutian Komandorsky region implications for slab melting and processes in the mantle wedge［J］.Geological Society of American Bulletin，1995，158(1/2):53-65.
[25]Defant M J，Drummond M S.Derivation of some modern arc agmas by melting of young subducted lithosphere［J］. Nature，1990，347(6294):662665.
[26]Calmus T，Aguillón-Robles A，Maury R C，et al.Spatial and temporal evolution of basalts and magnesian andesites("bajaites") from Baja California，Mexico:the role of slab melts［J］. Lithos，2003，66:77-105.
[27]Taylor R N，Nesbitt R W，Vidal P，et al.Mineralogy，chemistry，and genesis of the boninite series volcanics，Chichijima，Bonin-Islands，Japan［J］.Journal of Petrology，1994，35(3):577-617.
[28]Streck M J，Leeman W P，Chesley J T.High-magnesian andesite from Mount Shasta:a product of magma mixing and contamination，not a primitive mantle melt［J］.Geology，2007，35(1):351-354.
[29]洪路兵，张银慧，任钟元，等.辽西黄半吉沟早白垩世义县组高镁安山岩的成因［J］.岩石学报，2017，33(1):41-55.(Hong Lu-bing，Zhang Yin-hui，Ren Zhong-yuan，et al.Petrogenesis of Huangbanjigou high-Mg andesite in early cretaceous Yixian formation，western Liaoning［J］.Acta Petrologica Sinica，2017，33(1):41-55.)
[30]Shellnutt J G，Zellmer G F.High-Mg andesite genesis by upper crustal differentiation［J］.Journal of the Geological Society，2010，167(6):1081-1088.