[ ] E 2 3 ( 1) :1 S32X E ICP-MS km 2 ;2 Ca 2+ Mg 2+ ;3 ΣREE 1 Eu [28] ;4 3000m [29] ;5 [2730] [30] - - (S32X) ( 2) 1 E 2 3 Fig

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1 GeologicalScienceandTechnologyInformation Vol.36 No.1 Jan doi: /j.cnki.dzkq [J] (1): a 1b 1a 1b 1a1b 2 3 1a 1b 4 5 (1. a. ;b ; ;3. ( ) ; ; ) : :1 ;2 FeO MnO 4.112% 0.186% Ca 2+ Fe 2+ Sr 2+ Mn 2+ Mg 2+ ;3ΣREE Eu ;4δ 18 O PDB -6.8 ~ : ; ; ; ; :P :A : (2017) [1-2] ;2 50% 80% [3] [4] ;3 ( ) [5] [9] t [6] E 2 [10] 3 : [11] [12] [13] [14] [15-22] t [7-8] :1 : : : ( ) : ( @qq.com : (1965 ) ) chenggang@nwu.edu.cn

88 2017 [6-723-27] E 2 3 ( 1) :1 S32X E 2 3 1400 ICP-MS km 2 ;2 Ca 2+ Mg 2+ ;3 ΣREE 1 Eu [28] ;4 3000m [29] ;5 [2730] [30] - - (S32X) ( 2) 1 E 2 3 Fig.

2 [ ] E 2 3 ( 1) :1 S32X E ICP-MS km 2 ;2 Ca 2+ Mg 2+ ;3 ΣREE 1 Eu [28] ;4 3000m [29] ;5 [2730] [30] - - (S32X) ( 2) 1 E 2 3 Fig.1 Locationofthestudyareaandthedevelopmentcharac- teristicsofthefaultofe 2 3inOligocenereservoirsofthe Yingxiarea 2 [6] Fig.2 SedimentaryfaciesoftheYingxiarea

3 1 : X ( Empyrean ) Mn/Sr [ ] 40μm 2g Mn/Sr [35-36] 40kV ma 2 /min Ce Eu 0.02 (2θ) X 0.040Ce ΣREE ( ZSXPrinmusⅡ) 0.071mm(200 ) 5g 60kV ma 30 3 mm 20 min 3.1 E 2 3 [25-26] ( Finnigan MAT252) 90μm 110 2h 20 mg 5 ml 100% 42 X 75 16h (-80~ 47.6% S32X ) 59.6% GBW04405 V-PDB %1.0% ICP-MS 40μm 7.1%20.4%0.1%1.7%0.1%3.6%1.4% (1.41g/mL) [w(h 2O 2 )= 3.5%0.4%1.0%0.1%37.4% 12.7% ( 30%] 1) 2θ ( > ( 3-mno) %) ICP ( 3-ae) ( 3-abcef) ( 3-def) ( 3-g~l) [ ] S32X E δ 18 O δ 13 C δ 18 O δ 13 C 2.8% 2%~5% μm 2 δ 18 O δ 13 [31-32] C SY/T E 2 3 [37]

地质科技情报年表英西地区ＳＸ井渐新统全岩矿物质量分数特征ＴｂＣｈｏｆｍｎｏｎｎｏｆｈｏｋｏｆｏｎｖｏｎｈｗＳＸｏｆｈｙｎｇｘｇｏ样品号岩性深度ｍ层位英钾长斜长方解文菱铁矿盐黄铁矿赤铁矿硬膏钙芒硝普通锐钛矿铁白黏土辉云矿物ｗｂ含泥灰质白云岩ＸＸ

4 地质科技情报年表英西地区ＳＸ井渐新统全岩矿物质量分数特征ＴｂＣｈｏｆｍｎｏｎｎｏｆｈｏｋｏｆｏｎｖｏｎｈｗＳＸｏｆｈｙｎｇｘｇｏ样品号岩性深度ｍ层位英钾长斜长方解文菱铁矿盐黄铁矿赤铁矿硬膏钙芒硝普通锐钛矿铁白黏土辉云矿物ｗｂ含泥灰质白云岩ＸＸ含粉砂泥质碳酸盐岩含粉砂白云岩Ｘ含粉砂白云岩Ｘ含灰白云岩Ｘ含灰白云岩Ｘ含灰白云岩ＸＸ含泥粉砂质白云岩Ｘ含粉砂泥质碳酸盐岩Ｘ含云粉砂质灰岩含粉砂灰岩Ｘ含粉砂白云岩Ｘ含灰白云岩Ｘ平均值ＥＥＥＥＥＥＥＥＥＥＥＥＥ图英西地区ＳＸ井渐新统岩心及微观照片ＦｇＣｏｐｈｏｏｇｐｈｎｄｍｏｏｐｆｕｏｆｏｇｏｎｖｏｎｈｗＳＸｏｆｈＹｎｇｘｍ含粉砂白云岩岩心照片ｂｍ白云岩岩心照片ｍ白云岩岩心照片ｄｍ含粉砂泥质碳酸盐岩泥晶发育偏光显微镜照片ｍ含粉砂白云岩裂缝发育部分含油偏光显微镜照片ｆｍ含灰白云岩裂缝发育被膏充填偏光显微镜照片ｍ含泥灰质白云岩白云晶体形貌扫描电镜照片ｍ含ｇｊ泥白云岩晶体形貌扫描电镜照片ｍｍ含泥白云岩天青含重晶扫描电镜背散射照片ｎｏｍ含粉砂白云岩天青含重晶扫描电镜背散射照片

5 1 : 91 - ) ( 5-ab c) (SrSO 4 ) ( 5-def) ( Ca 2+ Fe 2+ IM4000 ) ( Sr 2+ Mn 2+ Mg 2+ FEI QuantaFEG450 ) Ca 2+ Mg 2+ Fe μm 100~ nm [2638] 1 600nm ( 4) molmg 2+ 2 molcaco 3 1 molca 2+ 1mol (CaMg(CaCO 3 ) 2 ) Mg Ca 2+ Fe 2+ Mg 2+ Fe 2+ Mg Fe 2+ S32X ( ) Ca(Mg0.83Fe 0.17 )(CO 3 ) 2 2 w(feo) w(mno) Ca(Mg % 0.141% Fe 0.05 )(CO 3 ) 2 Fe 2+ Mg 2+ w(feo) w (MnO) 4.112% 0.186% w (FeO) w (MnO)( 0.942% 100~600nm 0.052% ) [2426] w(feo) w(mno) 500~1000nm [26] w(feo) w(mno) 1.917% :2CaCO Mg Fe 2+ Ca 0.323% [15] (Mg0.83Fe 0.17 )(CO 3 ) 2+Ca 2+ w (FeO) w (MnO) % 0.36% [33] ( 3) Fe Mn w(σree) Fe w (ΣREE) Mg ( ) [2539] (48.70 Fe 10-6 ~ ) Fe ( ~ ) [33] w (CaO) % ~ w(σree) w(σree) ( % % 10-6 ) [40] w(cao) % ~40.285% w(σree) ( ) [41] % w (CaO) ( 6) (30.411%)w(MgO) % ~18.878% Eu [42-43] % ;LREE/HREE (La/Yb) N w(mgo) (21.857%) w (CaO) (La/Sm) N (Gd/Yb) N 8.08 w(mgo) w(cao) w(mgo) ( % %) [26] LREE HREE LREE Ca Mg Ca [33] (

6 地质科技情报年ｍ含泥白云岩氩离子抛光后场发射扫描电镜照片图英西地区ＳＸ井渐新统岩心及微观照片ＦｇＣｏｐｈｏｏｇｐｈｎｄｍｏｏｐｆｕｏｆｏｇｏｎｖｏｎｈｗＳＸｏｆｈＹｎｇｘ表英西地区ＳＸ井渐新统岩电子探针成分组成ＴｂＥｏｎｍｏｐｏｂｎｏｆｈｍｏｍｐｏｏｎｏｆｈｏｋｏｆＯｎｖｏｎｈｗＳＸｏｆｈｙｇｏＹｎｇｘ样品编号深度层位ｍＳＸＥＳＸＥＳＸＥ平均值探针点ＮＯＭｇＯＡＯＳＯＳＯＫＯＣＯＭｎＯＦＯＳＯＢＯ总量ｗｂ矿物名称

7 第期张浩等柴达木盆地英西地区渐新统热液改造型白云岩的发现及意义图英西地区ＳＸ井渐新统裂缝中的热液矿物ｍＦｇＨｙｄｏｈｍｍｎｎｈｆｕｏｆＯｇｏｎｖｏｆｏｍｈｗＳＸｍｏｆｈｙｎｇｘ裂缝中的热液粗晶ＳＥＭ图片ｄ裂缝中的热液天青ＳＥＭ图片ｆ图中的天青能谱谱图表英西地区ＳＸ井渐新统岩稀土元素组成ＴｂＡｎｏｆｒｅｅｕｏｆｏｎｖｏｎｙｇｏＳＸｏｆｈｙｎｇｘｈｗ样品编号岩性深度ｍＸＸＸＸＸ含泥灰质泥质碳含泥含粉砂含灰白云岩酸盐岩白云岩白云岩白云岩ＬＣＰＮｄＳｍＥｕＧｄＴｂｗｂＤｙＨｏＥＴｍＹｂＬｕＨＲＥＥＬＲＥＥＨＲＥＥＹｂＮＬＲＥＥＬＲＥＥＳｍＮＬＧｄＹｂＮ δｅｕ δｃＹｂＮ代注稀土元素球粒陨标准化数据引自文献Ｌ表球粒陨标准化后的比值ＥｕＮＳＱＲＴＳｍＧｄＮ δｅｕ δｃＣＮＳＱＲＴＬＰＮＮ表示球粒陨标准化后的值图英西地区ＳＸ井渐新统岩稀土元素配分模式ＦｇＲＥＥｄｂｕｏｎｐｎｏｆＯｇｏｎｖｏｎｈｗＳＸｏｆｈＹｎｇｘ碳氧同位素组成英西地区渐新统湖相碳酸盐岩的碳同位素平均值为 δ ＣＰＤＢ值变化范围为氧同位素δＯＰＤＢ值变化范围为平均值为表前人研究表明柴西地区典型的准同生交代成因的湖相碳酸盐岩的 δ ＣＰＤＢ和 δ ＯＰＤＢ的平均值分别为和由此可见研究样品的碳同位素组成与其相当但氧同位素组成明显偏轻图多分布于其最小值区域而与青西凹陷白垩系热液白云岩相比氧同位素值多分布于其最大值区域导致这一同位素组成特征的主要控制因素包括

8 (1) δ 13 C ( [43-44] :1 7) [633] ;2 δ 13 [153345] C ( CO 2 δ 18 O PDB [33] ) ;2 δ 13 C [6] δ 18 O PDB [6] ; E % 1.65% δ 18 O PDB δ 18 O PDB δ 18 O PDB ;3 ( 2) ;4 (2) :1 δ 18 O 7 S32X ; Fig.7 CarbonandoxygenisotopiccompositionoftheOligocenela- [ ] E 2 3 custrinecarbonateinthewels32xoftheyingxiarea Table4 4 S32X AnalysisdataoftraceelementsandcarbonandoxygenisotopicvaluesoftheOligocenelacustrinecarbonateinthewel S32XoftheYingxiarea /m δ 13 CPDB/ δ18 OPDB/ / Mn Sr Ba S/ w B /10-6 Sr/Ba Mn/Sr Shi32X Shi32X Shi32X Shi32X Shi32X Shi32X Shi32X Shi32X Shi32X Shi32X Shi32X Shi32X Shi32X

9 1 : 95 4 ICP-MS [4]. 41(6): [5] (1) (3): [7] Fe Mn [J] (2):7-15. ΣREE Eu [J] (5): [9] (3): [10] [J] (2) S32X E 2 3 :1 Mg 2+ Fe 2+ [13] Mg 2+ Ca 2+ ;2 Mn 690. [14] ;3w(ΣREE) [15] w(σree)( ) ;4δ 18 [J]. O PDB (2): (3) 1μm [46] (E 2 3) Bul.Can.Petrol.Geol : Assoc.Petrol.Geol.Bul : : [1] Bustilo M AArribasM EBustilo M.Dolomitizationandsi- licificationinlow-energylacustrinecarbonates(paleogenema- dridbasinspin)[j].sedimentarygeology (1/2): [2] TueherM EWrightVP.Carbonatesedimentology[M].Ox- ford:blackwelscientificpublications1990. ence1997: [J] [J] (3): [6]. : [J].. [8].. : [J] (5): [11]. [J] (5): [12]. [J] (8): [J] (3): : [16]LavoieDMorinC.HydrothermaldolomitizationintheLower Silurian Sayabec formation in northern Gaspé-Matapédia icanceforhydrocarbonreservoirs[j].bul.can.petrol.geol : [3] AlsharhanASNairnA E M.Sedimentarybasinsandpetrole- umgeologyofthemiddleeast[m].amsterdam:elseviersci-. [J] (6):681- (Québec):Constraintontimingofporosityandregionalsignif- [17]LavoieDChiGBrennan-AlpertPetal.Hydrothermaldolo- mitizationinthelowerordovician Romaineformationofthe Anticostibasin:Significanceforhydrocarbonexploration[J]. [18] WierzbickiRDravisJJAl-AasmIetal.Burialdolomitiza- tionanddissolutionofupperjurassicabenakiplatform car- bonatesdeeppanukereservoirnovascotiacanada[j].am. [19] Hurley N FBudrosR.Albion-scipioandstonypointfields- USA MichiganBasin[C] BeaumontE AFosterN H.Strati- graphictraps1aapg TreatiseofPetroleum GeologyAtlas ofoilandgasfields.tulsa:americanassociationofpetrole- um Geologists1990:1-38. [20]LuczajJAHarrison IW BWiliamsNS.Fracturedhydro- thermaldolomitereservoirsinthedevoniandundeeformation ofthecentral Michigan Basin[J].Am.Assoc.Petrol.Geol.

10 Bul : [21]SmithLB.OriginandreservoircharacteristicsofUpperOrdo- viciantrenton-blackriverhydrothermaldolomitereservoirsin New York[J].Am.Assoc.Petrol.Geol.Bul : field[j].mineral.mag : amchina[j/ol].carbonatesand Evaporites201530(3). DOI: /s canceofsalinelacustrinedolomitefromthe Qaidam Basin [22] WilkinsonJJEarlsG.Ahightemperaturehydrothermalori- ginforblackdolomitematrixbrecciasintheirishzn-pbore- [23]HuangChenggangZhaoFanYuanJianyingetal.Thecharac- teristicsofdolomitereservoirinsalinelacustrinebasinqaid- [24]YuanJianyingHuangJianyingZhaoFanetal.Carbonand oxygenisotopiccompositionandpalaeoenvironmentalsignifi- WesternChina[J/OL].JournalofPetroleumScienceandEn- gineering (11): doi: /j.petrol [26]. andevolution[m].london:blackwel1985: : [J]. [41]SunSSMcDonough W F.Chemicalandisotopicsystematics (1): ofoceanic basalts:implicationsfor mantlecomposition and [27]. processes[c] SundersA DNorry MJ.MamatismintheO- [J] (2): ceanbasin.[s.l.]:londongeologicalsocietyspecialpublica [28]ZhaoFanHe WenyuanHuangChenggangetal.Salinefluid interactionexperimentinclasticreservoiroflacustrinebasin [J/OL].Carbonatesand Evaporites201631(3).Doi: /s [29]. sedimentarypetrologyofarcheanclasticsedimentaryrocksat [J] (5): Mt.GoldsworthyPilbaraCratonWestern Australia:Evidence fortheearlyevolutionofcontinentalcrustandhydrothermal [30]. alteration[j].precamb.res : [J] (4): [31]. [J] (5): [J] (1): [34]. [J] (2): [35]DehlerC MElrick MBlochJDetal.High-resolutionδ 13 C stratigraphyofchuargroup(ca ma)grandcanyon: ImplicationsforMid-Neoproterozoicclimatechange[J].Geol. Soc.Am.Bul (1/2): topicexcursioninearth History:TheNeoproterozoicShuram formation (NafunGroupOman)[J].Precamb.Res (1): [37]. SY/T [S]. : 2011:2. [38]. [M]. : 2003:62 [32]. dolomitesinthesouthwestern CantabrianZone (Spain)and [J] theirrelationtothelatevariscanevolution[j].mar.petrol. (3): Geol (5): [33] Qing Hairuo. [46]LapponiFBechstaedtTBoni Metal.Hydrothermaldolo- [J]. : mitizationinacomplexgeodynamicseting(lowerpalaeozoic (4): northernspain)[j].sedimentology201461(2): [25]. basinqaidamchina[j/ol].carbonatesand Evaporites [J] (3): (3).Doi: /s [36]LeGuerrouéEAlenP ACrozziA.Chemostratigraphicand sedimentologicalframeworkofthelargestnegativecarboniso- [39]YuanJianyingHuangChenggangZhaoFanetal.Geochemi- calcharacteristicsofeocenedolomiteinthesalinelacustrine [40]TaylorRMclenanS M.Thecontinentalcrust:Itscomposition tions198942: [42]HumphrisiSEBach W.OntheSrisotopeandREEcomposi- tionsofanhydritesfromthetagseafloorhydrothermalsys- tem[j].geochim.cosmochim.acta200569: [43]SugitaniKYamashitaFNagaokaTetal.Geochemistryand [44]. [45]GasparriniaMBechstadtaTBonib M.Massivehydrothermal

11 1 : 97 DiscoveryandSignificanceofDolomitesAlteredbyHydrothermal FluidinOligoceneReservoirsoftheYingxiAreaQaidamBasin Zhang Hao 1a1b ChenGang 1a1b ZhuYushuang 1a1b HuangChenggang 2 YangShuang 3 SiYang 1a1b LiXue 4 XueZhao 5 (1a.StateKeyLaboratoryofContinentalDynamics;1b.DepartmentofGeologyNorthwestern UniversityXi an710069china;2.keylabofreservoirdescriptionofcnpclanzhou China;3.SchoolofEarthSciencesandResourcesChinaUniversityofGeosciences(Beijing) Beijing100083China;4.PetroChinaChuanqingDrilingEngineeringCompanyEngineering InstituteofTechnologyXi an710018china;5.researchinstituteofexplorationand DevelopmentofHuabeiOilfieldCompanyRenqiu Hebei062552China) Abstracts:Throughthecomprehensivestudyofcoreand microstructurecharacteristicspetrologytrace elementsandcarbonandoxygenisotopegeochemicalcharacteristicsararedolomitereservoiralteredby hydrothermalfluidisdiscoveredforthefirsttimeintheyingxiareaofqaidam Basinbutthehydrother- malalterationdegreeisnotstrong.theevidencemainlyincludesthefolowingaspects:(1)themainres- ervoirrocksaredensemainlydevelopedwithankeriteandcalcitewithmicriticstructure.albitepyrite baritecelestiteandotherhydrothermalmineralscanbefoundoccasionaly.(2)thetraceelementsoffeo and MnOareenrichedincarbonatemineralsattheaverage4.112% and0.186% respectively.theyare significantlyhigherthanthepenecontemporarymetasomatismdolomites.thecontentsofca 2+ and Mg 2+ alsoincreasereflectingthatthehydrothermalfluidisalkalinehotbrinerichinca 2+ Fe 2+ Sr 2+ Mn 2+ voirsalteredbyhydrothermalfluidforthefirsttimeopensupnewhorizonsforthedeeptightoilandgas explorationofyingxiareain Qaidam Basin.Thisresearchresultscanbeanimportantguideforfinding quality dessert reservoirsinthedeepstrataofyingxiarea. andafew Mg 2+.(3)REEhasalargerangeofchangeswithhighertotalamount.ObviousEunegativea- nomalyisdisplayedonthereedistributionmodelcurves.thisreflectsthereecompositioncharacteris- ticsofthelakeenvironmentspecificthermalfluid.itformedinalkalinedeeplakehotbrineenvironment. (4)Thechangerangeofδ 18 O PDBvaluesis withanaverageof-5.2.thevaluesare betweenhydrothermaldolomiteandpenecontemporaneous metasomatism dolomite.thisshowsthatthe dolomiteisalteredbyhydrothermalfluidtoacertainextentbasedonpenecontemporaneousmetasomatism origin.thedegreeofhydrothermalmodificationiscontroledbydevelopmentdegreeoffractureandthe distancebetweenthesampleandthehydrothermalchannel.insummarythediscoveryofdolomitereser- Keywords:hydrothermalalteration;intercrystalinepore;carbonandoxygenisotope;Yingxiarea;Qaid- am Basin

, 3.1 PM303, 10(2)( 5, 5 ), 1 w (SiO 2 ) 68% ~89%, 2( 1, 1) (Al 2O 3,Fe 2O 3,MnO) (MgO,K 2O, Na 2O),w(TiO 2 ) w (SiO 2 ) ;,w (TiO 2 ) 0.31%

, 3.1 PM303, 10(2)( 5, 5 ), 1 w (SiO 2 ) 68% ~89%, 2( 1, 1) (Al 2O 3,Fe 2O 3,MnO) (MgO,K 2O, Na 2O),w(TiO 2 ) w (SiO 2 ) ;,w (TiO 2 ) 0.31% 36 3 2017 5 GeologicalScienceandTechnologyInformation Vol.36 No.3 May 2017 doi:10.19509/j.cnki.dzkq.2017.0302,,,. [J].,2017,36(3): 7-17. 1, 1, 1, 2, 1 3 (1., 264004;2. ( ), 430074; 3., 710000) :, (Al 2O