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1.
Using Raman spectroscopy to improve our understanding of geological fluidsMurphy andRoberts.1995.Geochim.Cosmochim.Acta,59:4809~4824 Murphy andRoberts.1997.ChemicalGeology,135:1~20 Murphy,Stevens andL aGrange.2000.Geochim.Cosmochim.Acta,64:479~494 Sam son andWalker.2000.CanadianMineralogist,38:35~43…  相似文献   

2.
1.IntToductionLowerJurassicDaanzaireservoirofCentralSichuanFieldisakindoftightfracturedreservoir,itsproductiveabilityisverylow.Thereasonoflowproductionisbadqualityofreservoir.Theexistenceoffewfracturesandsolutionporesalongthesefracturesmakereservoirproductive.Mainreservoirrocktypeislacustrinelimestonerichinbelly-fossils.MainporetypesofreservoirincludetectonicfractUre,diageneticfracture,beddingfractureandsolutionpore.ThoughthewholevolumeoffractUresandsolutionporesisverylow,buttheseporeshave…  相似文献   

3.
YQ0902孔位于瓯江三角洲南翼的海岸平原上,沉积相与AMS14C测年分析表明,钻孔底部为MIS 3阶段的河湖相沉积,之上为形成于MIS 2的硬粘土层.约在10cal.kaB.P.海侵到达本区,沉积了一套厚约29m的海侵-海退沉积旋回.古气候重建表明,50 ~ 35cal.kaB.P.凉爽干燥,35 ~ 25cal.kaB.P.温和湿润,25~ 10cal.kaB.P.寒冷干燥,10 ~ 9cal.kaB.P.凉爽偏干,9.0~6.5cal.kaB.P.暖热潮湿,6.5 ~ 4.8cal.kaB.P.温凉偏干,4.8~1.8cal.kaB.P.温暖潮湿,1.8cal.kaB.P.之后趋同于现代气候.受中全新世东亚夏季风减弱影响,研究区降雨减弱始于6.5cal.kaB.P.,这与前人研究认为季风区降雨减弱年限随纬度增加有时滞的观点相一致.孢粉记录的两次百年尺度(6.9 ~7.3cal.kaB.P.和5.0 ~5.5cal.kaB.P.)降温事件,与全球性强降温事件(7.3cal.kaB.P.和5.5cal.kaB.P.)有较好的对应关系.  相似文献   

4.
《地质学报》1943,(Z2):216-223
正 A Agraulos zone, 40. Aikuan group, 111. Amphoton typica zone, 40. Amplexograptus confertus, 41; (?). c. zone, 43. Anatina sp., 126. Annularia (?) paradoxa Sze, 67. Anodo(?)tophora münste(?)i (Wissmann), 127; A. m. var. khonvenensis Patte, 127; A. sp., 59, 127.  相似文献   

5.
重庆市石柱县冷水溪剖面上二叠统吴家坪阶下部为粉砂岩、泥岩,局部夹煤线,上部为灰岩(含白云岩),夹硅质岩和页岩.对上部灰岩研究发现:下段(第161~181层)由灰泥岩、粒泥灰岩、白云岩化灰泥岩和白云岩组成,未发现牙形石;上段(第182~189层)以灰泥岩、粒泥灰岩为主,仅局部夹少量白云岩,牙形石含量极其丰富,共发现1属11种,包括C. guangyuanensis,C.orientalis、C.liangshanensis,C.bizarrensis,C.longicuspidata,C.inflecta,C.renewalpostbitteri,C protowangi.C.n.sp.A,C. n.sp.B和C. n.sp.C,其中C. renewalpostbitteri,C.protowangi,C.n.sp.A,C.n.sp.B和C.n.sp.C为新种.碳、氧同位素分析显示:下段岩层同位素值由下至上逐渐增高,向正向偏移,曲线呈锯齿状;上段岩层同位素值向上略变小,曲线平直,反映沉积环境变化较大.综合分析认为:下段岩层属于近岸局限环境,受淡水混合影响,海水盐度异常,不利于牙形石生存;上段岩层属于正常浅海环境,适合牙形石生活,牙形石含量极其丰富.根据C. renewalpostbitteri的首现位置可将吴家坪阶分为上亚阶和下亚阶.  相似文献   

6.
The Wupata‘erkan Group, also called Wupata‘erkan Formation, distributed in the South Tianshan, Xinjiang,China, mainly consists of gray and dark gray fine-grained clastic rocks, interlayered with volcanic rocks, carbonates and cherts. Some ultra-basic rocks (blocks) punctuate the formation. The formation was variously assigned to Silurian-Middle Devonian, Silurian-Lower Devonian, and pre-Devonian, mainly based on Atrypa bodini Mansuy, Hypothyridina parallelepipedia (Brour.) and Prismatophyllum hexagonum Yoh collected from the limestone interlayers, respectively.However, radiolarian fossils obtained from 24 chert specimens of the Wupata‘erkan Group, mainly include Albaillella sp.cf. A. undulata Deflandre, Albaillella sp. cf. A. paradoxa Deflandre, Albaillella cf. A. deflandrei Gourmelon, Albaillella sp. cf. A. indensis Won, Albaillella sp. cf. A. excelsa Ishiga, Kito and Imoto, Albaillella sp. and Latentifistulidae gen. et. sp.indet., are earliest Carboniferous and Late Permian. The earliest Carboniferous assemblage is characterized by Albaillella sp. cf. A. undulata Deflandre, Albaillella sp. cf. A. paradoxa Deflandre, Albaillella cf. A. deflandrei Gourmelon and Albaillella sp. cf. A. indensis Won, and the Late Permian assemblage by Albaillella sp. cf. A. excelsa Ishiga, Kito and Imoto. This new stratigraphic evidence indicates that the Wupata‘erkan Group is possibly composed of rocks with different ages from Silurian to Permian, and therefore, it is probably an ophiolite mrlange. The discovery of Late Permian Albaillella sp. cf. A. excelsa provides more reliable evidence supporting the existence of a Permian relic ancient oceanic basin in the western part of Xinjiang South Tianshan.  相似文献   

7.
的NO工卜O洲16.哪卜.昙.V哪魏.洲洲.6006州.q属.三之LON叫卜0116.哪卜.昌.V0099食91帅.哪卜.薯.V aol卜.哪卜.昙瞬囚1.叫叭卜N.导9卜0 .91帅.哪卜.导.Vt,、O,O)皿00匀月义)小】沪叫《幻 幽卜卜哪‘92.国.口N.卜N.昙.口闪.卜闪.导.口0 100.哪卜.导.州工洲6.哪.9囚.国.口 21!11.嘟卜.国.V的.0口.州.10卜.u一导.口﹄nof口‘。do﹄n阁 工的帅.的,的帅.岑.国001卜.哪卜.岑.V提材柳嘛 。︵国0丫ON端才口 HO的NONz(一V.。凶.A.川曰)N(q叨.。V) 呻︵,O的︶︵”01).。么八季份酬夕十识份斑书樱g编惫|︶。﹄0囚﹃︹如昌冲。灿,J口门;丫闺 …  相似文献   

8.
A.凡now吕舍具Brooke,N.P.束四牌楼瞪士胡同福公司搏Chow,K.C.周阴基,子建,湖北大冶孩瘫探鞍股Drake,F.5.,Shantung ohristian University,T,inan,Shantuug.Edmond,Jilla西直四外尸,颐裤煤蛾公司Garretson,Mary Welleek,Colu一n飞,ia University,New York City,U.5.A.Hsu,Y.M.徐渊摩,厚甫,北京女子大率徐竟甫收搏Kao,L.高鲁,曙青,北京中央觑象台King,sohtsu G.金招基,叔初,北京嘎嘎胡同Kil:g,Kunpei c.金城,常伯,北京束城技搔胡同Kobayashi,B.小林胖生,热河阜新森大典煤绩公司K,ung,K.H.孔夏锹,章虎,北京都城煌厢街Liu,0.F…  相似文献   

9.
A REINTERPRETATION OF THE OLDEST HIMALAYAN FORELAND BASIN SEDIMENTS: A REVISED AGE FOR THE BALAKOT FORMATION, PAKISTAN1 BossartP .1986 .PhDthesisno .2 6 0 ,ETHZurich ,Switzerland . 2 BossartP ,OttigerR .EclogaeGeologicaHelvetica[j],1989,82 :133~ 16 5 . 3 BurbankDW ,BeckRA ,MulderT .TheTectonicevolutionofAsia[M ],A .Yin ,T .M .Harrison ,eds . 4 CritelliS ,GarzantiE .SedimentaryGeology[J],1994,89:2 6 5~ 2 84. 5 DeCelle…  相似文献   

10.
1.IntroductionTheHuunmdepressionandtheDongyingdepressionbotharelocatedinthesouthoftheJiyanglargedepressionoftheBobalbasin.TheyareboundedonthenorthbytheNingiinembossmentandtheWuliembossmentintheChengningupliftandtheChenjieduangembossmentintheJiyanglargedepressionthroughtheCizhenfaultandtheChennanfaultFig.ITectoniclocationoftheHuimindepressionandtheDongyingdepression.1.fault,2.Eogeneoverlyingline,3.Eogencthinning-outlineandonthesouthbytheLuxiupliftthroughtheQihe-Guangraofault.Andonthewes…  相似文献   

11.
1.IntroductionTheManzhouli-SuifenheGeoscienceTransect(M-SGT)isinthenortheastChina,acrosstheprovincesofInnerMongoliaandHeilongiiang.Geologically,itissitllatedamongtheplatesofNorthChina,SiberiaandWesternPacific.ThewholeIengthoftheM-SGTisaboutl3Ookm,whichcrossesmanytectonicunits(Fig.l).ItisclearthatitstectonicsitUationisuniqueanditsgeologicstructUreiscomplex.Deepearthquakeshappenfrequentlya1ongthetransect.Therefore,itisarepresentativeprofileofnortheastChinaandtheNortheastAsia.TheM-S…  相似文献   

12.
1.IntroductionEasternQinlingtoDabieshanareaincentreChinacontainsabundantMoresources.ItisthemostimportantMomineralizingareaofChina.About40%exploredMoresourcesofChinaarestoredinthatarea.ThemainModepositsaredistributedintheEasternQinlingbelt.Inrecentyears,morethantenModeposits(spots),e.g.Qiushuwan,Mushan,Dayingiian,Xiaojiafan,Tangiiaping,havealsobeenfoundinZhenpingtoTongbaithentoDabieshanregion,butmineralizingscaleofthemismuchsmallercomparedwiththeModepositsintheEasternQinlingbelt.Momin…  相似文献   

13.
1.IntroductionIntheYanl82--Yong921regionofYong'AnZhenOilfield,ThearenaceousconglometaticrocksofSa-S,memberlieintheeastsectionoftheslOPezonewhichisinthenoaloftheDongyingsag,inthesaddlebetWeentheYong'AnandYangjiaswells,fromNo.33inlineinthewesttoNo.113inlineintheeast,fromNo.820crosslinetoNo.770crosslineinthesouth,theareaisabout12tri2.Anonlapdepositionwithdouble-bedconsbetiondepositSalongtheslopezone,WhichbelongstouPPerandlowerTertiarystrata.2.BasicCharacteristicsofOilAccumulation2.1.L…  相似文献   

14.
回 顾 国内外研究表明(S.Taber,1930;G.Beskow,1935;H.A.1955;1957;作者,1965等),在水流可以排除的条件下,饱水砂砾石等粗粒土冻结后的含水量比冻前反而减少。许多学者(A.E.Wissa andR.T.Martin,1968;N.R.Morgens-tern and C.B.Smith,1973;W.D.  相似文献   

15.
邱雅惠  刘健  刘斌  宁亮  严蜜 《第四纪研究》2019,39(4):1055-1067
全新世冷事件期间的气候格局及其成因是过去气候变化研究的热点问题.利用基于通用气候系统模式开展的TraCE-21ka气候模拟试验资料,在定义和提取典型冷事件的基础上,分析了全强迫试验模拟的全新世北半球多次冷事件的规模及冷事件发生时温度与降水的空间特征,并结合全强迫试验中使用的4个外强迫序列(淡水注入、轨道强迫、大气温室气体、大陆冰盖)及其对应的单因子敏感性试验,初步探讨了部分典型冷事件的成因.结果表明: TraCE-21ka模拟的冷事件年份与重建/集成序列的冷事件年份对应较好,模式较好地模拟出了全新世北半球的冷事件;全新世期间,北半球共发生了 10 次典型冷事件( 9. 7 ka B. P.、 8. 3 ka B. P.、 7. 3 ka B. P.、6. 2 ka B. P.、 5. 2 ka B. P.、 4. 2 ka B. P.、 3. 4 ka B. P.、 2. 1 ka B. P.、 1. 0 ka B. P.和 0. 2 ka B. P.);每次冷事件发生时,北半球大范围降温和变干,温度变化呈现明显的纬度地带性差异,中高纬地区降温最显著,低纬10°N附近降水减少最显著;在 8. 3 ka B. P.、 7. 3 ka B. P.、 6. 2 ka B. P.、 5. 2 ka B. P.、 4. 2 ka B. P.、 3. 4 ka B. P.、 2. 1 ka B. P.和1. 0 ka B. P.共8次冷事件中,北半球温度和降水的空间变化较为相似,北大西洋经圈翻转流( Atlantic Meridional Overturning Circulation,简称 AMOC)变弱导致了冷事件,格陵兰岛南部的北大西洋海域降温和变干尤为显著;9. 7 ka B. P.和3. 4 ka B. P.的冷事件可能与轨道强迫有关,淡水注入造成了8. 3 ka B. P.和7. 3 ka B. P.的冷事件, 0. 2 ka B. P.冷事件可能与大气温室气体波动有关.地球系统内部变率对于冷事件的发生可能也有一定影响.  相似文献   

16.
1.IntroductionThekhondaliteseriesinthenorthpartofHelanMountainshasbeenstudiedinrecentyears(Hu,N.G.,1994,Huo,F.Ch.,1989,Lu,L.Zh.,et.al.,1995,1996).Thesestudieshavefocusedongeochemistry,geochronology,tectonicevolutionandpeakP-Tconditions.MostauthorsagreethatthekhondaliteshaveexperiencedthemetamorphismofgranulitefactesduringpeakmetamorphismandclockwisePTevolution.However,theprogradeP-Ttrajectoryhasbeenpoorlydocumented,althoughtheclockwisePTtpathhasbeentacitlyassumed.Furthermore,therehaveb…  相似文献   

17.
正 With 1 Plate The fossil Charophyta collected by Messrs. T. K. Huang, C. C. Young, Y. C. Cheng and T. C. Chow from near Kucha, S Sinkiang, consist of a very large number of calcified oogonia and a few fragments of undeterminable vegetative parts. The  相似文献   

18.
通过对江陵剖面沉积物的高密度采样和有机碳同位素分析,重建了江汉平原江陵地区近9.0kaB.P.以来的古气候古环境演化。江汉平原江陵地区9.0~6.31kaB.P.属相对温暖湿润的气候环境,晚期向干旱方向发展;6.31~4.97kaB.P.为冷干气候环境,在5.78kaB.P.达到极盛;4.97~2.50kaB.P.为暖湿气候时期,其间3.44~2.50kaB.P.湖沼泥炭发育,3360aB.P.、3110aB.P.、2935aB.P.和2710aB.P.为明显的降温期,尤以2710aB.P.的降温幅度最大;2.50kaB.P.以来温度相对较低,为冷期。江陵地区近9kaB.P.以来的气候变化与国内相邻区域的研究资料相一致,但又有区域的差异性。  相似文献   

19.
1IntroductionTheTarimBasin ,NWChina,istheonlybasininChinawherenotonlymarine ,butalsoter restrialindustrialoilandgaspoolsaredeveloped .TheterrestrialoilandgaspoolshavebeenfoundintheKuchedepressioninthenorthernpartofthebasinanditsfrontupliftarea (Fig .1) .ThesourcerocksoftheterrestrialoilandgaspoolsareTriassicandJurassiclacustrinemudstonesandswampcoals.ThebiomarkersfromthesaturatedfractionsofTriassicandJurassicterrestrialsourcerocksandFig .1 .LocationofTriassicandJurassicterrestrialsource…  相似文献   

20.
The 2013 Geoscience Frontiers Annual Convention was held in Beijing, China during Nov. 1-2, 2013 hosted by China University of Geosciences, Beijing (CUGB) (Fig. 1 ). This conference assembled earth scientists from 5 countries, including China, India (Dr. C. Manikyamba, Miss Preetha Warrier), Japan (Prof. T. Tsunogae), South Korea (Prof. S. Kwon) and South Africa (Prof. H.M. Rajesh), and also representatives from Elsevier (Beijing) and Thomson Reuters (Beijing) offices.  相似文献   

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