用户名: 密码: 验证码:
西准噶尔克西—柳树沟一带石炭系的划分与对比
详细信息    本馆镜像全文|  推荐本文 |  |   获取CNKI官网全文
摘要
本文以新疆西准噶尔克西-柳树沟一带石炭系沉积地层为研究对象,从岩石组合、沉积环境、生物化石、上下地层接触关系、构造形态差异等方面,对该套沉积地层作了比较系统的对比研究,取得了如下认识:
     1.西准噶尔克西-柳树沟一带石炭系希贝库拉斯组与包古图组岩石组合区别明显,具有良好的宏观可识别性和区域延展稳定性,区域上可对比,属于不同的岩石地层单位。
     2.希贝库拉斯组为一套无障壁海岸(滨海或陆源海盆沉积为主)粗碎屑沉积,主要岩石组合为砾岩、含砾粗砂岩及砂岩。包古图组总体为一套深海相细碎屑岩,夹有火山岩、灰岩夹层或条带,局部发育放射虫硅质岩。
     3.希贝库拉斯组陆源碎屑供给充足,发育有多层的粗粒含砾砂岩以及冲刷侵蚀面、包卷层理等原生沉积构造,砾石具有明显的定向性。上述说明该组的沉积是在水动力很强的无障壁海岸(以滨海沉积为主)环境下形成。
     相对上覆希贝库拉斯组的粗碎屑岩,下伏包古图组由细砂岩-粉砂岩-硅质粉砂岩的正旋回组成,磨圆-性与分选性变好,成熟度变高。本组形成环境应位于低流态的浪击面以下,为一套深海相细碎屑沉积建造。
     4.希贝库拉斯组不整合于包古图组之上:二者直接接触,接触面处未见断裂迹象;接触面两侧岩性不同,产状不一致;不整合面上见有底砾岩。该不整合指示了一次重大构造事件的发生,代表了一次沉积旋回结束与新一次旋回开始的分界面,即包古图组沉积结束后,区内发生了褶皱造山,形成沉积间断,之后地壳下降,并再次接受了希贝库拉斯组的沉积。
     希贝库拉斯组底部灰岩砾石中发现Lithostrotionella cf. shimeri, Multithecopora等珊瑚化石,其组合与阿克库拉采石场包古图组灰岩中所含化石组合基本一致,并且含化石的灰岩砾石之岩性相同。据前人资料,区内仅包古图组中有灰岩沉积记录。由此推断希贝库拉斯组底部的灰岩砾石物源只能来自于包古图组,新老关系不言而喻。
     5.希贝库拉斯组与包古图组地层的褶皱样式差异显著,表明两组是不同的变形域、不同的构造应力场和动力学体制的产物。包古图组的强烈挤压变形与前述的褶皱隆起造山作用密切相关,并且在希贝库拉斯组形成之后,经历了再次叠加褶皱变形。
     6.本文对包古图组安山岩中锆石进行LA-ICP-MS测年,最新获得锆石U-Pb年龄345.6±6.2Ma,MSWD=1.14(置信度95%),与西准噶尔宝贝金矿一带火山岩中获得328.6±1.8Ma的锆石SHRIMP年龄相吻合,其时代为早石炭世晚期。
     7.依据上述生物化石、不整合接触关系,结合区域资料,将克西-柳树沟一带石炭系划分为晚石炭世希贝库拉斯组与早石炭世包古图组。这一结论为正确确立本区地层层序,建立区域地层格架和大区地层对比提供了重要的佐证,也是恢复本区古沉积盆地及鉴别地壳运动特征的重要依据,对重建中亚地区晚古生代地质历史有重要的价值。
This dissertation is object on the sedimentary stratum of Carboniferous System in the Kexi-Liushugou area of Western Junggar, Xinjiang. Studying the features of strata in our researching area synthetically, including lithofacies, rock association, organic fossil analysis and contact relationship between the stratum and structural form differences. Through the several years of our research, gained the achievement as follows:
     1. The clastic rock with Carboniferous Xibeikulasi Formation and Baogutu Formation in the Kexi-Liushugou area of Western Junggar, is different from each other, and have macroexamination regional extension stability and regional correlation. They are belongs to two different rock-stratigraphicunits.
     2. The Xibeikulasi Formation is no barrier seacoast (main littoral or terrigenous sea basin deposit) coarse clastic deposit, the major lithology of which are conglomerate, bearing gravel coarse sand, and sandstone; Baogutuzu Formation is deep-sea facies microclastic rock, with volcanic rock, limerock partings or banding, and radiolarian silicalite in some area, which consists siltstone, siliceous siltstone,silicalite and so on.
     3. The terrigenous supply of Xibeikulasi formation is sufficient. It develops coarse-grained gravel-bearing sandstone, scouring erosion surface, convolute bedding and other primary sedimentary structures. The gravels have obviously orientable arrangement. The above show that the Xibeikulasi formation formed under a non-barrier coast sendiment environment (dominated by onshore sedimentary system) with strong hydrodynamic force.
     Relative to the overlying coarse fragment sandstone of Xibeikulasi formation, the Baogutu formation is composed of normal cycle formed by fine sandstone-siltstone-siliceous siltstone, with getting better and higher of the psephicity, sorting and maturity. The Baogutu formation developed under wave base of lower regime is a suit of abyssal fine-clastic sediment formation.
     4. The Xibeikulasi Formation aboved-mentioned unconformity on the Baogutu Formation, they contact directly between which there is no indication of fault; the lithology of both sides of contact, the occurrence is different; and basal conglomerate spread on the unconformity interfaces. The unconformity indicates one big important tectonic event happened, represents the tectonic setting transition from one sedimentary cycle finished and a new one happened. These suggest that folding mountain-building movement occurred after the Baogutu formation sedimentary, and then the Xibeikulasi formation begin to deposit.
     The corals Lithostrotionella cf. shimeri, Multithecopora which was discovered from the limestone gravel at the bottom of Xibeikulasi formation can be contrast with the fossil assemblage of Baogutu formation, and the lithologic character of limestone gravel is same with the limestone of Baogutu formation. During our 1:50000 regional geological and mianeral survey, the lithologic deposit record only occurred in the Baogutu Formation. It can be sure that the gravel must come from the Baogutu formation. So that, the chronogensis of the Xibeikulasi formation and the Baogutu formation is understood without further explanation.
     5. The significantly different fold-shapes between Xibeikulasi formation and Baogutu formation show that they are products of different deformation domain, tectonic stress field and dynamics system. The strong compression deformation of Baogutu formation is related to aforesaid folding mountain-building movement, and after Xibeikulasi formation forming, Baogutu formation experience superimposed folding again.
     6. LA-ICP-MS dating technique is used to determine the zircons from Baogutu formation, and yielded zircon U-Pb age of 346±12Ma (MSWD=1.14,95% confidence). The data is consistent with the SHRIMP age of 328.6±1.8Ma of volcanic rock in the Baobei gold deposit, Western Junggar. With the relevant data synthesized, the Baogutu formation was considered to form in the Early Caiboniferous.
     7. According to the biology fossil, discordant contact relationship, and correlating the regional researching, the Carboniferous system in the Kexi-Liushugou area is divided into the Late Carboniferous Xibeikulasi Formation and the Early Carboniferous Baogutu Formation. The result affords important basis for building correct regional stratigraphic sequence and correlation, and it is great significant for recoverying paleosedimentary basin in the area, discriminating features of crustal moving, rebuilding the Late Paleozoic era geologic history of the central Asia.
引文
[1]金玉轩,范影年,伦志强,王向东,等.中国地层典-石炭系[M].北京:地质出版社,1993
    [2]《中国地层典》编委会.中国地层典-石炭系[M].地质出版社.2000
    [3]A.萨尔瓦多.国际地层指南地层分类、术语和程序[M].第二版.金玉轩,戎嘉余,等译.北京:地质出版社,2000.5
    [4]张守信.理论地层学与应用地层学-现代地层学概念[M].北京:高等教育出版社,2006.4
    [5]全国地层委员会.中国地层指南及中国地层指南说明书(修订版)[M].北京:地质出版社,2001
    [6]姜在兴.沉积学[M].石油工业出版社,2003.5
    [7]孙永传,李蕙生.碎屑岩沉积相和沉积环境[M].北京:地质出版社.1986.12
    [8]路风香,桑隆康.岩石学[M].北京:地质出版社,2002
    [9]Reading H. G. Sedimentary Environments and Facies[A]. In:H. G. Reading, eds. Sedimentation and Tectonics[C].1986,478-519
    [10]吴根耀.造山带地层学[M].成都:四川科学技术出版社,2000:1-218
    [11]Horn I, Rudnick R L, Mcdonough W F. Precise elemental and isotope ratio determination by simultaneous solution nebulization and laser ablation-ICPMS:Application to U-Pb geochronologyo[J]. Chemical Geology.2000,16(7):405-425
    [12]Ballard J R, Palin J M, Williams I S, et al. Two ages of porphyry intrusion resolved for the super-giant Chuquicamata copper deposit of northern Chile by ELA-ICPMS and SHRIMP[J]. Geology.2001,9: 383-386
    [13]Kosler J, Fonneland H, Sylvester P, et al. U-Pb dating of detrital zircons for sediment provenance studies-a comparison of laser ablation LCPMS and SIMS techniques [J]. Chemical Geology,2002,18 (2):605-618
    [14]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
    [15]Andersen T. Correction of common lead in U-Pb analyses that do not report 204Pb [J]. Chemical Geology,2002,19 (2):59-79
    [16]Ludwig K R. Isoplot--A plotting and regression program for radiogenic-isotope data[J]. US Geological Survey Open-File.Report.1991,39:91-445
    [17]成守德,王广瑞,杨树德,等.新疆古板块构造[J].新疆地质,1986,4(2):1-26
    [18]成守德,王元龙.新疆大地构造演化基本特征[J].新疆地质,1998,16(2): 97-107
    [19]成守德,王元龙.中亚地壳发展演化与成矿[C].乌鲁木齐:新疆人民出版社,2000
    [20]陈哲夫,梁云海.新疆多旋回构造与板块运动[J].新疆地质,1991,9(2):95-107
    [21]朱宝清,冯益民.新疆西准噶尔板块构造及演化[J].新疆地质,1994,2
    [22]曹荣龙,朱寿华,刘建兵,等.新疆北部板块与地体构造格局.见:涂光炽主编,新疆北部固体地球科学新进展.北京:科学出版社,11-26
    [23]张良臣,吴乃元.天山地质构造及演化史[J].新疆地质,1985,3(3):1-14
    [24]成守德,张湘江.新疆大地构造基本格局[J].新疆地质,2000,18(4):293-296
    [25]周良仁等.西准噶尔地质构造发展及岩浆演化特征.西安地矿所所刊,1987,第16号:3-55
    [26]蔡土赐,孙巧缡,缪长泉,等.新疆维吾尔自治区岩石地层[M].中国地质大学出版社,1999
    [27]王广平,吴广涛,伦志强,等.新疆维吾尔自治区区域地质志[M].北京:地质出版社,1993
    [28]廖卓庭,王玉净,王克良.新疆北部石炭纪生物地层研究新进展[J].见:涂光炽主编.新疆北部固体地球科学新进展.北京:科学出版社.1993,79-94
    [29]廖卓庭,杨蔚华,魏洲龄,等.新疆北部石炭系及其含矿性研究报告[R].1990
    [30]郝杰,刘洪涛,张维.西准古生代地层.见:涂光炽主编.新疆北部固体地球科学新进展[J].北京:科学出版社,1993,24-26
    [31]中国科学院南京地质古生物研究所编.中国地层研究二十年(1979-1999).合肥:中国科学技术大学出版社.2000,3-22
    [32]新疆维吾尔自治区区域地质测量,1:20万托里幅区域地质矿产调查报告[R].1975
    [33]新疆维吾尔自治区第七地质大队,长安大学,新疆托里县科尔巴依-野马井地区1:5万区域地质矿产调查报告[R].2008
    [34]新疆维吾尔自治区区域地质测量大,1:20万克拉玛依幅区域地质矿产调查报告[R].1966
    [35]地质矿产部直属单位管理局.花岗岩类区1:5万区域地质填图方法指南[M].武汉:中国地质大学出版社,1991,1-93
    [36]周维屏、陈克强、简人初,等.1:50000区域地质填图新方法[M].武汉:中国地质大学出版社,1993,18-28,41-49
    [37]肖庆辉,邓晋福,马大铨,等.花岗岩研究思维与方法[M].北京,地质出版社,2002,53-63
    [38]董申葆.花岗岩成因类型划分的探讨[J].见:花岗岩地质和成矿关系国际学术会议论文集.南京:江苏科学技术出版社1984,49-57
    [39]肖序常,汤跃庆,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
    [40]冯益民.西准噶尔古板块构造特征[J].西安地矿所所刊,1987,第18号,141-160
    [41]佟丽莉,李永军,张兵等.新疆西准噶尔达尔布特断裂带南包古图组安山岩LA-ICP-MS锆石U-Pb测年及地质时代[J].新疆地质,2009,27(3):226-230
    [42]李永军,佟丽莉,张兵等.论西准噶尔石炭系希贝库拉斯组与包古图组的新老关系[J].新疆地质,2010,待刊
    [43]赵治信,韩建修,王增吉.塔里木盆地西南缘石炭纪地层及其生物群[M].北京:地质出版社,1984
    [44]赵治信.新疆中天山下、中石炭统界线和牙形石序列[J].科学通报,1988,33(23):1806-1811
    [45]朱怀诚,赵治信.塔里木盆地泥盆4石炭系孢粉研究新进展[J].新疆石油地质,1999,20(3),248-251
    [46]吴乃元,王明倩.新疆石炭系.新疆区调,新疆地质专辑[J].新疆地质,1983:252-224
    [47]杨式溥.新疆波罗霍洛山北坡下石炭统腕足动物及其地层意义[M].北京:科学出版社,1964
    [48]张兵康磊,王晓刚,李永军等.新疆西准噶尔夏尔莆岩体中微粒镁铁质包体特征及其意义.新疆地质,2009,27(3):207-211
    [49]康磊,李永军,张兵等.新疆西准噶尔夏尔莆岩体岩浆混合的岩相学证据.岩石矿物学杂志,2009,28(5):423-432
    [50]苏玉平,唐红峰,侯广顺,等.新疆西准噶尔达拉布特构造带铝质A型花岗岩的地球化学研究[J].地球化学,2006,35(1):55-67
    [51]金成伟,张秀棋.新疆西准噶尔花岗岩类时代及其成因[J].地质科学,1993,28(1):28-36
    [52]庞振甲,李永军,赵玉梅等.新疆西准阿克巴斯陶铝质A型花岗岩的厘定及意义[J].新疆地质,2010,待刊
    [53]吴元保,郑永飞.锆石成因矿物学研究及其对U-Pb年龄解释的制约[J].科学通报,2004,49(16):1589-1604
    [54]Pidgeon R T, Nemchin A A, Hitchen G J. Internal structures of zircons from Archaean granites from the Darling Range batholith:Implications for zircon stability and the interpretation of zircon U-Pb ages[J]. Contributions to Mineralogy and Petrology,1998,13 (2:288-299
    [55]Claesson S, Vetrin V, Bayan ova T, et al. U-Pb zircon age from a Devonian carbonatite dyke, Kola peninsula, Russia; a record of geological evolution from the Archaean to the Palaeozoic[J]. Lithos, 2000,51 (1-2):95-108
    [56]Compston W, Williams I S, Kirschvink J L,et al. Zircon U-Pb ages for the Early Cambrian time-scale[J]. Journal of Geological. Society. London,1992,14 (9):171-184
    [57]涂荫玖,杨晓勇,李惠民,郑永飞.皖东南黄片麻岩的锫石U-Pb年龄[J].岩石学报,2001,17(1):157-160
    [58]w康普斯顿,R T皮金.西澳大利亚杰克希尔山更为古老的碎屑锆石的证据[J].见高劢主编:早太古代地壳形成及演化一颗粒锆石U-Pb同位素测年研究与应用.北京:冶金工业出版社,1992
    [59]王瑞,朱永峰.西准噶尔宝贝金矿地质与容矿火山岩的锆石SHRIMP年龄[J].高校地质学报,2007,13(3):590-602
    [60]安芳,朱永峰.新疆哈图金矿蚀变岩型矿体地质和地球化学研究[J].矿床地质,26(6):621-633
    [61]新疆维吾尔自治区地质矿产局,1:5万铁厂沟等四幅区域地质矿产调查(联测)报告[R].1998
    [62]李永军,张天继,栾新东.西天山特克斯达坂晚古生代若干不整合的厘定及地质意义[J].地球学报,2008,29(3):145-153
    [63]周守沄.新疆石炭纪古地理[J].新疆地质,2000,18(4):324-329
    [64]陈书平,张一伟,汤良杰.准噶尔晚石炭世-二叠纪前陆盆地的演化[J].石油大学学报,2001,25(5):11-23
    [65]杜品德,王坤茹,谭泽金等.新疆石炭系中间界线[J].新疆石油地质,2004,25(5):563-567
    [66]成守德,王元龙.中亚地壳发展演化与成矿[C].乌鲁木齐:新疆人民出版社,2000
    [67]陈哲夫,梁云海.新疆多旋回构造与板块运动[J].新疆地质,1991,9(2):95-107
    [68]朱宝清,冯益民.新疆西准噶尔板块构造及演化[J].新疆地质,1994,2
    [69]周良仁等.西准噶尔地质构造发展及岩浆演化特征.西安地矿所所刊,1987,第16号:3-55
    [70]冯益民.西准噶尔古板块构造特征.西安地矿所所刊,1987,第18号,141-160
    [71]成守德,王元龙.新疆大地构造演化基本特征[J].新疆地质,1998,16(2):97-107
    [72]陈哲夫,梁云海.新疆多旋回构造与板块运动[J].新疆地质,1991,9(2):95-107
    [73]朱宝清,冯益民.新疆西准噶尔板块构造及演化[J].新疆地质,1994,2
    [74]韩宝福,季建清,宋彪,陈立辉,张磊.2006.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,22(5):1077-1086
    [75]何国琦,成守德,徐新,李锦轶,赫杰.中国新疆及邻区大地构造图(1:2 500 000)[M].北京:地质出版社,2005.
    [76]何国琦,朱永峰.中国新疆及其邻区地质矿产对比研究[J].中国地质,2006,33:451-460
    [77]朱永峰,何国琦,安芳.中亚成矿域核心地区地质演化与成矿规律[J].地质通报,2007,26(9):1167-1177
    [78]朱永峰,王涛,徐新.新疆及邻区地质与矿产研究进展[J].岩石学报,2007b,23(8):1785-1794
    [79]成守德,王元龙.中亚地壳发展演化与成矿[C].乌鲁木齐:新疆人民出版社,2000
    [80]曹荣龙,朱寿华,刘建兵,等.新疆北部板块与地体构造格局[J].见:涂光炽主编,新疆北部固体地球科学新进展[M].北京:科学出版社,11-26
    [81]成守德,张湘江.新疆大地构造基本格局.新疆地质,2000,18(4):293-296
    [82]肖序常,汤跃庆,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
    [83]黄汲清.中国大地构造特征的新研究[J].中国地质科学院院报,1984,9,5-18

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700