东准噶尔卡拉麦里辉长岩斜锆石U-Pb年代学及其构造意义

doi:10.11872/j.issn.1005-2518.2019.05.678

Abstract

Abstract:

The Kalamaili ophiolite belt is an important component of East Junggar.It extends along the Kalamaili Mountains in NWW direction, extending about 400 km.It is an important tectonic unit in the region. The opening and closing of oceanic separation represented by the ophiolite belt is of great significance to the tectonic evolution of the whole east Junggar region.Previous studies on the age of ophiolite have mainly come from the fossil age of siliceous rocks and the zircon U-Pb age of diabase, gabbro and baddeleyite granite. However,there are few reports on the age of baddeleyite in ophiolite.The Kalamaili ophiolite is mainly composed of peridotite,gabbro,plagiogranite and a small amount of siliceous rock, controlled by the Kalamaili fault, which makes gabbro appear as tectonic block and accompanied by peridotite.Gabbro belongs to the large class of silica-unsaturated rocks. Baddeleyite coexists steadily with pyroxene and olivine, while zircon belongs to silica-saturated, supersaturated minerals and gabbro. The crystallization of baddeleyitee is earlier than that of zircon, which is more representative of the true age of formation of rocks. Therefore, in this study, more than 200 baddeleyite were selected from fresh gabbro exposed in massive form in the western part of ophiolite belt, and 80 of them were selected to make targets and take transparent, reflective and cathodoluminescent photographs.Since baddeleyites are black in the cathodoluminescent photographs, LA-ICP-MS U-Pb dating was carried out at the selected testing sites of the transparent and reflective photographs, and 16 years of good harmony were obtained.Age data ranged from 431 Ma to 444 Ma. The harmonic age of rock ²⁰⁷Pb/²³⁵U-²⁰⁶Pb/²³⁸U is （434.4+2.7）Ma (MSWD=0.87) and the weighted average age of ²⁰⁶Pb/²³⁸U is （436.4+2.5）Ma (MSWD=0.59) calculated by ISOPLOT software. The two ages are consistent within the error range, indicating that the gabbro was formed in early Silurian.Up to now, this age is the earliest one found in the Karamari ophiolitic melange, which indicates that the Karamari oceanic basin began to stretch and form in the early Silurian.That is, the Karamari oceanic basin existed before the closure of the oceanic basin represented by the Zhaheba-Aermantai ophiolite in the north of the basin.

Key words: ophiolite, gabbro, diagonal zircon, Early Silurian, Kalamaili, eastern Junggar

CLC Number:

P597+.3

Man YU, Pengfei DI. Baddeleyite U-Pb Geochronology and Tectonic Significance of the Gabbro in Kalamaili, Eastern Junggar[J].Gold Science and Technology, 2019, 27(5): 678-686.

Figures/Tables 5

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Table 1

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References 36

1	TangG J，WangQ，WymanD A，et al. Geochronology and geochemistry of Late Paleozoic magmatic rocks in the Lamasu-Dabate area，northwestern Tianshan (west China)：Evidence for a tectonic transition from arc to post-collisional setting[J]. Lithos，2010，119(3/4)：393-411.
2	XuZ，HanB F，RenR，et al.Ultramafic-mafic mélange，island arc and post-collisional intrusions in the Mayile Mountain，west Junggar，China：Implications for Paleozoic intra-oceanic subduction-accretion process[J]. Lithos，2012，132-133：141-161.
3	Jahn，WuB M，ChenF，et al.Granitoids of the Central Asian Orogenic Belt and continental growth in the Phanerozoic[J]. Transactions of the Royal Society of Edinburgh Earth Sciences，2000，91(1/2)：181-193.
4	JahnB M，WindleyB，Natal’InB，et al. Phanerozoic continental growth in Central Asia [J]. Journal of Asian Earth Sciences，2004，23(5)：599-603.
5	ChenB，JahnB M. Genesis of post-collisional granitoids and basement nature of the Junggar Terrane，NW China：Nd-Sr isotope and trace element evidence[J]. Journal of Asian Earth Sciences，2004，23(5)：691-703.
6	肖序常，汤耀庆，冯益民，等.新疆北部及其邻区大地构造[M]. 北京：地质出版社，1992.
	XiaoXuchang，TangYaoqing，FengYimin，et al.Tectonic Ecolution of the Northern Xinjiang and Its Adjacent Regions[M]. Beijing：Geological Publishing House，1992.
7	韩宝福，何国琦，王式洸.后碰撞幔源岩浆活动、底垫作用及准噶尔盆地基底的性质[J].中国科学（地球科学），1999，29(1)：16-21.
	HanBaofu，HeGuoqi，WangShiguang.Postcollisional mantle-deviced magmatism，underplating and implications for basement of the Junggar Basin[J]. Science China （Earth Sciences)，1999，29(1)：16-21.
8	李锦轶，杨天南，李亚萍，等. 东准噶尔卡拉麦里断裂带的地质特征及其对中亚地区晚古生代洋陆格局重建的约束[J]. 地质通报，2009，28(12)：1817-1826.
	LiJinyi，YangTiannan，LiYaping，et al.Geological features of the Karamaili faulting belt, eastern Junggar region, Xinjiang,China and its constraints on the reconstruction of Late Paleozoic ocean-continental framework of the Central Asian region[J].Geological Bulletin of China，2009，28(12)：1817-1826.
9	汪帮耀，姜常义，李永军，等. 新疆东准噶尔卡拉麦里蛇绿岩的地球化学特征及大地构造意义[J]. 矿物岩石，2009，29(3)：74-82.
	WangBangyao，JiangChangyi，LiYongjun，et al. Geochemistry and tectonic implications of Karamaili ophiolite in east Junggar of Xinjiang[J]. Journal of Mineralogy and Petrology，2009，29(3)：74-82.
10	李锦轶. 新疆东准噶尔蛇绿岩的基本特征和侵位历史[J]. 岩石学报，1995，11(增1)：73-84.
	LiJinyi. Main characteristics and emplacement processes of the east Junggar ophiolites，Xinjiang，China[J]. Acta Petrologica Sinica，1995，11(Supp.1)：73-84.
11	李锦轶. 新疆东部新元古代晚期和古生代构造格局及其演变[J]. 地质论评，2004，50(3)：304-322.
	LiJinyi.Late Neoproterozoic and Paleozoic tectonic framework and evolution of eastern Xinjiang，NW China[J]. Geological Review，2004，50(3)：304-322.
12	李锦轶，肖序常，汤耀庆，等. 新疆东准噶尔卡拉麦里地区晚古生代板块构造的基本特征[J]. 地质论评，1990，36(4)：305-316.
	LiJinyi，XiaoXuchang，TangYaoqing，et al. Main characteristics of Late Paleozoic plate tectonics in the southern part of east Junggar，Xinjiang[J].Geological Review，1990，36(4)：305-316.
13	韩宝福，季建清，宋彪，等. 新疆准噶尔晚古生代陆壳垂向生长(Ⅰ)——后碰撞深成岩浆活动的时限[J]. 岩石学报，2006，22(5)：1077-1086.
	HanBaofu，JiJianqing，SongBiao，et al. Late Paleozoic vertical growth of continental crust around the Junggar Basin，Xinjiang，China(Part Ⅰ)：Timing of post-collisionai plutonism[J]. Acta Petrologica Sinica，2006，22(5)：1077-1086.
14	黄岗，牛广智，王新录，等. 新疆东准噶尔卡拉麦里蛇绿岩的形成和侵位时限——来自辉绿岩和凝灰岩LA-ICP-MS锆石U-Pb年龄的证据[J]. 地质通报，2012，31(8)：1267-1278.
	HuangGang，NiuGuangzhi，WangXinlu，et al.Formation and emplacement age of Karamaili ophiolite：LA-ICP-MS zircon U-Pb age evidence from the diabase and tuff in eastern Junggar，Xinjiang[J]. Geological Bulletin of China，2012，31(8)：1267-1278.
15	杨高学，李永军，李注苍，等. 东准噶尔东北缘后碰撞火山岩成因与构造环境[J]. 地学前缘，2010，17(1)：49-60.
	YangGaoxue，LiYongjun，LiZhucang，et al. Genesis and tectonic settings of post-collision volcanic rocks in north eastern margin of east Junggar，Xinjiang[J]. Earth Science Frontiers，2010，17(1)：49-60.
16	杨高学，李永军，吴宏恩，等. 东准噶尔卡拉麦里地区黄羊山花岗岩和包体LA-ICP-MS锆石U-Pb测年及地质意义[J]. 岩石学报，2009，25(12)：97-107.
	YangGaoxue，LiYongjun，WuHong’en，et al. LA-ICP-MS zircon U-Pb dating of the Huangyangshan pluton and its enclaves from Kalamaili area eastern Junggar,Xinjiang,and geological implications[J]. Acta Petrologica Sinica，2009，25(12)：97-107.
17	唐红峰，苏玉平，刘丛强，等. 新疆北部卡拉麦里斜长花岗岩的锆石U-Pb年龄及其构造意义[J]. 大地构造与成矿学，2007，31(1)：110-117.
	TangHongfeng，SuYuping，LiuCongqiang，et al. Zircon U-Pb age of the plagiogranite in Kalamaili belt, northern Xinjiang and its tectonic implications[J].Geotectonica et Metallogenia，2007，31(1)：110-117.
18	舒良树，王玉净. 新疆卡拉麦里蛇绿岩带中硅质岩的放射虫化石[J]. 地质论评，2003，49(4)：408-412.
	ShuLiangshu，WangYujing.Late Devonian-Early Carboniferous radiolarian fossils from siliceous rock of the Kelameili ophiolite，Xinjiang[J].Geological Review，2003，49(4)：408-412.
19	李亚萍，李锦轶，孙桂华，等. 准噶尔盆地基底的探讨：来自原泥盆纪卡拉麦里组砂岩碎屑锆石的证据[J]. 岩石学报，2007，23(7)：1577-1590.
	LiYaping，LiJinyi，SunGuihua，et al. Basement of Junggar basin:Evidence from detrital zircons in sandstone of previous Devonian Kalamaili formation[J]. Acta Petrologica Sinica，2007，23(7)：1577-1590.
20	吴小奇，刘德良，魏国齐，等. 准噶尔盆地陆东—五彩湾地区石炭系火山岩地球化学特征及其构造背景[J]. 岩石学报，2009，25(1)：55-66.
	WuXiaoqi，LiuDeliang，WeiGuoqi，et al. Geochemical characteristics and tectonic settings of Carboniferous volcanic rocks from Ludong-Wucaiwan area,Junggar Basin[J]. Acta Petrologica Sinica，2009，25(1)：55-66.
21	何国琦，李茂松，贾进斗，等. 论新疆东准噶尔蛇绿岩的时代及其意义[J]. 北京大学学报（自然科学版），2001，37(6)：852-858.
	HeGuoqi，LiMaosong，JiaJindou，et al. A discussion on age and tectonic significance of ophiolitein eastern Junggar，Xinjiang[J]. Acta Scicentiarum Naturalum Universitis Pekinesis，2001，37(6)：852-858.
22	李现冰.新疆东准噶尔卡拉麦里蛇绿混杂岩组成、结构及演化研究[D].西安：长安大学，2013.
	LiXianbing.The Characteristics of Kalamaily Ophiolite Complex,Structure and Evolution in Eastern Junggar，Xinjiang[D]. Xi’an:Chang’an University，2013.
23	HeamanL M，LecheminantA N. Paragenesis and U-Pb systematics of baddeleyite (ZrO₂)[J]. Chemical Geology，1993，110(1/2/3)：95-126.
24	李惠民，李怀坤，陈志宏，等. 基性岩斜锆石U-Pb同位素定年3种方法之比较[J]. 地质通报，2007，26(2)：128-135.
	LiHuimin，LiHuaikun，ChenZhihong，et al. Comparison of three methods for baddeleyite U-Pb isotope dating of basic rocks[J]. Geological Bulletin of China，2007，26(2)：128-135.
25	SengörA M C，Natal’InB A，BurtmanV S. Evolution of the Altaid tectonic collage and Paleozoic crustal growth in Eurasim[J]. Nature，1993，364：299-307.
26	JahnB，WuF，ChenB.Granitoids of the Central Asian Orogenic Belt and continental growth in the Phanerozoic[J]. Geological Society of America Special Papers，2000，350：181-193.
27	WindleyB F，KrönerA，GuoJ，et al. Neoproterozoic to Paleozoic geology of the Altai orogen，NW China：New zircon age data and tectonic evolution[J]. The Journal of Geology，2002，110(6)：719-737.
28	WangT，HongD，JahnB，et al. Timing，Petrogenesis，and setting of Paleozoic Synorogenic intrusions from the Altai Mountains，northwest China：Implications for the tectonic evolution of an accretionary orogen[J]. The Journal of Geology，2006，114(6)：735-751.
29	ShenX，ZhangH，WangQ，et al. Late Devonian-Early Permian A-type granites in the southern Altay Range，northwest China：Petrogenesis and implications for tectonic setting of “A-type” granites[J].Journal of Asian Earth Sciences，2011，42(42)：986-1007.
30	张峰，徐涛，范俊杰，等. 东准噶尔石炭系巴塔玛依内山组火山岩全岩Sm-Nd等时线年龄及其构造意义[J]. 地球化学，2014,43(3)：301-316.
	ZhangFeng，XuTao，FanJunjie，et al. Whole-rock Sm-Nd isochron age of Carboniferous volcanic rocks in eastern Junggar and its tectonic significance[J]. Geochimica，2014,43(3)：301-316.
31	张弛. 新疆蛇绿岩某些地质特征[J]. 地质论评，1981，27(4)：307-314.
	ZhangChi. Some geological features of the ophiolites in Xinjiang[J]. Geological Review，1981，27(4)：307-314.
32	蔡文俊，李春昱. 新疆东准噶尔北缘板块构造初步研究[C]//中国地质科学院文集.北京：中国地质学会，1983.
	CaiWenjun，LiChunyu. Preliminary study in plate tectonics of Northern East Junngar in Xinjiang[C]//Bulletin of the Chinese Academy of Geological Science.Beijing:Geological Society of China,1983.
33	方爱民，王世刚，张俊敏，等. 新疆北部卡拉麦里蛇绿岩中辉长岩的锆石U-Pb年龄及其构造意义[J]. 地质科学，2015，50(1)：140-154.
	FangAimin，WangShigang，ZhangJunmin，et al. The U-Pb ages of zircons from the gabbro in the Kalamaili ophiolite,North Xinjiang and its tectonic significances[J]. Chinese Journal of Geology，2015，50(1)：140-154.
34	李亚萍，李锦轶，孙桂华，等. 新疆东准噶尔早泥盆世早期花岗岩的确定及其地质意义[J]. 地质通报，2009，28(12)：1885-1893.
	LiYaping，LiJinyi，SunGuihua，et al. Determination of the Early Devonian granite in East Junggar，Xinjiang, China and its geological implications[J]. Geological Bulletin of China，2009，28(12)：1885-1893.
35	郭丽爽，张锐，刘玉琳，等. 新疆东准噶尔铜华岭中酸性侵入体锆石U-Pb年代学研究[J]. 北京大学学报(自然科学版)，2009,45(5)：819-824.
	GuoLishuang，ZhangRui，LiuYulin，et al. Zircon U-Pb age of Tonghualing intermediate-acid intrusive rocks，Eastern Junggar，Xinjiang[J]. Acta Scientiarum Naturalium Universitatis Pekinensis，2009,45(5)：819-824.
36	张永，梁广林，屈迅，等. 东准噶尔琼河坝岛弧早古生代岩浆活动的锆石U-Pb年龄和Hf同位素证据[J]. 岩石学报，2010，26(8)：2389-2398.
	ZhangYong，LiangGuanglin，QuXun, et al. Evidence of U-Pb age and Hf isotope of zircons for Early Paleozoic magmatism in the Qiongheba arc，east Junggar[J]. Acta Petrologica Sinica，2010，26(8)：2389-2398.

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样品编号	同位素比值				表面年龄/Ma
样品编号	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
14KL-5斜-01	0.534	0.012	0.07	0.001	435	8	437	5
14KL-5斜-02	0.525	0.007	0.071	0.001	429	5	444	5
14KL-5斜-03	0.535	0.006	0.07	0.001	435	4	439	5
14KL-5斜-04	0.538	0.007	0.07	0.001	437	4	437	5
14KL-5斜-05	0.53	0.007	0.069	0.001	432	5	431	5
14KL-5斜-06	0.513	0.006	0.071	0.001	421	4	442	5
14KL-5斜-07	0.523	0.007	0.069	0.001	427	4	432	5
14KL-5斜-08	0.525	0.007	0.07	0.001	429	4	436	5
14KL-5斜-09	0.533	0.009	0.071	0.001	434	6	440	5
14KL-5斜-10	0.531	0.008	0.07	0.001	433	5	437	5
14KL-5斜-11	0.526	0.007	0.069	0.001	429	5	431	5
14KL-5斜-12	0.534	0.007	0.07	0.001	435	5	437	5
14KL-5斜-13	0.522	0.008	0.07	0.001	427	5	435	5
14KL-5斜-14	0.527	0.009	0.069	0.001	430	6	432	5
14KL-5斜-15	0.52	0.006	0.07	0.001	425	4	434	5
14KL-5斜-16	0.515	0.006	0.07	0.001	422	4	439	5

Baddeleyite U-Pb Geochronology and Tectonic Significance of the Gabbro in Kalamaili, Eastern Junggar

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