|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 华北地台中元古代串岭沟组页岩中的砂脉构造:17亿年前甲烷气逃逸的沉积标识?显示文摘华北地台中元古界串岭沟组暗色页岩中发育一种特殊的砂质脉状构造;层面上表现为不规则密集分布的细砂脊,垂向上由不连续薄砂层和近于直立的'肠状'砂脉体相交互组成.浅色砂脉由较纯的石英粉砂-细砂组成,含微量自生白云石、菱铁矿及微晶碳酸盐岩斑块,与黑色泥质围岩边界截然.研究表明,砂脉构造可能是在早期成岩阶段前由来自薄砂层的细-粉砂灌入甲烷缓慢逃逸通道而成,并由于压实缩短而褶皱成'肠状'.薄砂层与黑色页岩形成的能量条件完全不同,可能系由风暴将海岸带或砂坝细砂带入低能环境而形成;甲烷源自沉积中埋藏的微生物席腐烂分解.围岩层面有微生物席成因微皱痕和气体逃逸形成的气泡构造,围岩中发现有细菌化石和草霉状黄铁矿.串岭沟组中密集发育的砂脉构造是目前地层中识别的最古老的甲烷排放证据,并有可能作为指示地质时期陆源碎屑沉积环境甲烷逃逸的沉积标识.大量高效温室气体进入大气圈可能是导致元古宙地球表层高温室气候和无冰川发育的重要原因. | 史晓颖 蒋干清 张传恒 刘娟 高林志 | 2008 | 地球科学(中国地质大学学报)2008，33，5： | 22 |
| 2 | 中国元古代碳酸盐岩微亮晶构造及形成的沉积环境约束显示文摘微亮晶构造(Microspar,Molar-Tooth Structure,简称MT)发育于全球各稳定克拉通的中、新元古代盖层碳酸盐岩中。微亮晶构造碳酸盐岩也发育于中国大部分地区的中、新元古代地层中。全球范围的中、新元古代微亮晶构造都表现显著一致的岩石学和沉积学特征。微亮晶构造呈肠状褶皱状等复杂形态。微亮晶由5~15μm的均匀、等粒状,规则或不规则多边形方解石或白云石组成。宿主沉积岩相岩石主要含有少量陆源碎屑物质的碎屑灰岩。微亮晶构造在阴极发光(CL)和背散射(BS)显微镜下显示,每个微晶方解石个体内部发育似棱形的晶核,其外为叠置的微晶方解石晶簇,说明微亮晶构造是围绕微晶核'增生'加大的集合体。微亮晶和宿主围岩电子探针测试表明,微亮晶Ca含量38%~40%,Mg、Al、Si、P、K、Fe含量小于0.2%,基质中粘土矿物含量和Si和Al的含量较高。微亮晶宿主岩相主要砂屑、粉屑和泥屑灰岩(白云岩)与含铁含泥灰质泥页岩,垂向岩相序列表现为向上变浅、变薄,其中频繁发育冲刷、充填和硬底(hardground)与压溶构造,以及平行层理,各种规模斜层理、波状层理-水平层理、粒序层理、同沉积揉皱构造和变浅与暴露构造等,反应了微亮晶构造碳酸盐岩的形成严格受沉积环境和微沉积岩相的约束,无一例外地发育于浅潮下带-潮上带(环潮坪)环境。微亮晶构造碳酸盐岩不仅是环潮坪沉积环境的指相标志,也是全球元古代时期特殊与重要沉积岩石类型,其形成受控于全球古地理和古海洋地球化学条件与背景,是中、新元古代时期全球变化的沉积记录,有益于全球对比和元古代古地理、大地构造重建。 | 柳永清 旷红伟 彭楠 刘燕学 江小均 许欢 | 2010 | 岩石学报2010，26，7： | 12 |
| 3 | 燕山中东部凌源地区雾迷山组MT构造的发现、地质特征和研究意义显示文摘MT构造碳酸盐岩(Molar-tooth structure carhonate)的研究已有百余年历史,尽管其成因至今还未完全达成共识,但其独特的地质特征和重要的地质意义使得它越来越引起地学界的重视。文中报道了在凌源中元古界雾迷山组中发现MT构造。通过对雾迷山组MT宏观、微观特征的详细观察,常量和微量元素以及碳、氧同位素分析和综合研究表明,MT断续发育于上部灰岩段,有细纺锤形、碎屑状、细长条带状(和/或肠状)及小瘤状(或不规则形态)等4种类型,其形态与沉积环境密切相关。MT发育层位Sr/Ba和Ca/Mg较高,相比邻近不发育MT的层位,分别表现为高δ^(13)C和低δ^(18)O.MT构造岩石学、形态学及地球化学研究表明,它形成于潮间带下部至风暴浪基面附近的潮下带环境,背景条件具有气候温暖、海水碳酸钙过饱和、生物产率较高,局部菌藻类生物富集的特点,碳酸钙软泥钙化速度快,菌藻类生物具有催生MT的作用。雾迷山组MT与同样发育MT的北美中元古界Belt超群及俄罗斯里菲系碳同位素具有良好的对比关系,它是区域和全球前寒武系对比的良好标志。 | 旷红伟 彭楠 罗顺社 岑超 李家华 陈铭培 | 2009 | 自然科学进展2009，19，12： | 12 |
| 4 | Molar-Tooth Structure from the Mesoproterozoic Wumishan Formation in Lingyuan,Yanshan Region,North China,and Geological Implications显示文摘Although its origin has not yet reached a consensus so far,MTS(Molar-Tooth Structure) has been documented for more than 100 years.Current study reports a discovery of MTS from the Mesoproterozoic Wumishan Formation,Lingyuan,Yanshan Region,North China,and the features and geological implications of MTS are further discussed.Here,straitigraphic horizons of MTS's occurrences show that it was mainly located within the top part of the Wumishan Formation,i.e.,limestone unit.Four kinds of morphology of MTS,i.e.,fine fusiform,debris,ribbon,ptigmatic and nodular(irregular),were recognized and thought to be highly related to the sedimentary environments and facies.Geochemistry of MTS including oxides,trace elements and C,O and Sr isotopes indicates that the horizons of MTS-bearing is of higher Sr/Ba and Ca/Mg ratios,lower positive δ13C and highly negative δ18O values than the adjacent stratigraphic levels of rare MTS.Lithology,morphology and geochemistry of MTS in the Wumishan Formation suggest that MTS occurs mainly in shallow subtidal near the storm wave base,which is typically characterized by warm temperature,oversaturated calcium carbonate seawater and high organic productivity.Furthermore,occasional enrichment of algae bacteria here is more favorable for the calcification of calcium oozes and catalytic for MTS.C isotope composition of the Wumishan Formation and MTS of this study is well correlated with that of the Mesoproterozoic Belt Supergroup,North America and Riphean,Siberia,suggesting that MTS acts as a sedimentary record responding to global changes and is a perfect indicator in Precambrian stratigraphic correlation worldwide. | KUANG Hongwei LIU Yongqing PENG Nan LUO Shunshe LI Jiahua CEN Chao CHEN Mingpei | 2012 | Acta Geologica Sinica(English Edition)2012，86，1： | 7 |
| 5 | 华北地台胶辽徐淮地区中—新元古代地层研究进展显示文摘华北地台东缘—东南缘的胶辽徐淮地(层)区发育了一套中—新元古代海相碎屑岩与碳酸盐岩地层,通常不整合覆于太古宇或古—中元古界之上,平行不整合伏于寒武系之下,在安徽和江苏北部、山东中—西部和山东半岛、辽东半岛以及吉林南部等地区出露良好。前人对于胶辽徐淮地区中—新元古界的划分和对比,尤其是该套地层的时代归属,长期存在不同的认识。在2014年出版的《中国地层表》中,辽南地区的细河群桥头组被归入南华系,而五行山群和金县群被划入震旦系(埃迪卡拉系)。近年来越来越多的岩石地层学、生物地层学、同位素化学地层学,尤其是同位素年代地层学的证据表明,淮南地区的淮南群—肥水群、淮北地区的淮北群、鲁西地区的土门群、胶东地区的蓬莱群、辽南地区的永宁组—细河群—五行山群—金县群、吉南地区的白房子组—细河群—浑江群都是中元古代晚期—新元古代早期(拉伸纪)的沉积地层。 | 庞科 唐卿 万斌 李光金 陈雷 袁训来 周传明 | 2021 | 地层学杂志2021，45，4： | 7 |
| 6 | Sedimentary Micro-facies and Macro Heterogeneity of Reservoir Beds in the Third Member of the Qingshankou Formation,Qian'an Area,Songliao Basin显示文摘练习核心和井日志的分析证明主要在 Qian'an 的 Qingshankou 形成的第三成员沙身体微外形是水下的支流隧道外形,床单沙外形和水下的扇子外形(olistostrome ) 。显示出这些的分发的地图和内部隧道的海湾和职业人员三角洲微外形 mocro 外形为不同时间片(Qingshankou 形成的更低、中间、上面的部分) 被介绍。这些地图在 depositional 时期期间在 Baokang 沉积系统揭示沉积运输的不稳定性和变化。沉积运输从在早阶段的西方,从在中间的舞台的南方并且从在迟了的舞台的西北。在 Qingshankou 形成的第三个成员的沙身体的厚度,孔和渗透的值证明他们有对中等的孔和低渗透低,并且被严肃的水库异质描绘。在微外形、水下的扇子之间的关节微外形被最高的异质,表沙和远侧的沙酒吧潜水艇外形描绘下次来,并且水下的支流隧道沙身体的异质是相对弱的。 | SHAN Xuanlong HU Jinxiang Reinhard F. SACHSENHOFER SHI Tiaotiao | 2007 | Acta Geologica Sinica(English Edition)2007，81，6： | 4 |
| 7 | Molar Tooth Structure:a Contribution from the Mesoproterozoic Gaoyuzhuang Formation,Tianjin City,North China显示文摘Molar-tooth(MT) structure is an enigmatic sedimentary structure consisting of variously-shaped cracks and voids filled with a characteristically uniform,equant calcite microspar.It is globally distributed but temporally restricted to rocks from Neoarchean to Neoproterozoic age.The origin of MT structures has been debated for more than a century and the topic continues to be highly contentious.Some features of MT structure occurring in micritic limestones of the Mesoproterozoic Gaoyuzhuang Formation(ca.15... | Maurice E.TUCKER | 2011 | Acta Geologica Sinica(English Edition)2011，85，5： | 4 |
| 8 | Review of molar tooth structure research显示文摘For more than a century,molar tooth structure(MTS) has been studied.The study developed in three stages.During the first stage(before 1980),researchers described three basic morphologies of MTS,mainly from the Belt Supergroup in North America,and they provided several hypotheses for the origin of MTS.During the second stage(1980-1999),the frequent discoveries of MTS on all continents resulted in many detailed descriptions of their shape and in several hypotheses concerning the origin of MTS.Notably,hypotheses of MTS's origin such as seismic activity and biological activity were developed.Since 2000,research has progressed into a new stage(the third stage).This is due to discoveries of MTS in the Meso-Neoproterozoic of China and elsewhere,and the ongoing debate on the seismic or biological origin is replaced by a hypothesis that involves gas expansion and chemically-controlled carbonate precipitation(both of them possibly affected by biological activities).This latter idea has gradually been commonly recognized as the mainstream theory.Despite continued disagreements,researchers now agree that microsparry calcite played a controlling role regarding the development and the global distribution of MTS in time and space during the Proterozoic,the morphological diversity,and the impact on the sedimentary environment.The present contribution analyses the three major hypotheses regarding the origin of MTS.it also discusses the shortcomings of the hypotheses regarding a seismic or biologic origin,and it details the modern hypothesis that links formation of cracks to the precipitation of sparry calcite.It is deduced that important questions dealing with the Precambrian can be answered,among other aspects regarding the depositional palaeogeography and stratigraphic correlations. | Hong-Wei Kuang | 2014 | Journal of Palaeogeography2014，3，4： | 4 |
| 9 | Genesis types of the Neoproterozoic Molar tooth structures in the southeastern Jilin and eastern Liaoning provinces and its research significances显示文摘Molar tooth(briefly called MT) carbonate is one of the Proterozoic carbonates with enigmatic sedimentary structure. According to the morphology of MT,it can be divided into two main genesis-morphology types,i.e.,autochthonous and allochthonous,and each type can be further divided into a series of subtypes. The autochthonous MT can be divided into filamentous(MF1) ,ribbon,nodular and dotted type(MF4) ,in which the ribbon one can be subdivided into simple vertical(MF2) and complex ribbon(MF3) ,broken ribbon by storm in situ(MF5) and MT within nodular limestone(MF6) . Allochthonous MT includes conglomerate clasts and horizontal detritus. Studying on the links between MT and the host rocks on five stratigraphic sections in the southeastern Jilin and eastern Liaoning indicates that the morphology of MT is closely related to host rocks,and seven genetic types by relationships between MT and the host rocks with facies interpretations are classified and discussed in this paper. The sedimentary environments of MT formation will be diverse if their morphologies are different. | KUANG HongWei1,2,3,JIN GuangChun1,2 & LIU YanXue3 1 Geochemical Department of Yangtze University,Jingzhou 434023,China 2 Key Laboratory of Exploration Technologies for Oil and Gas Resources,Ministry of Education of China School of Geophysics and Oil Resources of Yangtze University,Jingzhou 434023,China 3 Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China | 2009 | Science China Earth Sciences2009，52，S1： | 3 |
| 10 | A New Progress of the Proterozoic Chronostratigraphical Division显示文摘The Precambrian, an informal chronostratigraphical unit, represents the period of Earth history from the start of the Cambrian at ca. 541 Ma back to the formation of the planet at 4567 Ma. It was originally conceptualized as a 'Cryptozoic Eon' that was contrasted with the Phanerozoic Eon from the Cambrian to the Quaternary, which is now known as the Precambrian and can be subdivided into three eons, i.e., the Hadean, the Archean and the Proterozoic. The Precambrian is currently divided chronometrically into convenient boundaries, including for the establishment of the Proterozoic periods that were chosen to reflect large-scale tectonic or sedimentary features(except for the Ediacaran Period). This chronometric arrangement might represent the second progress on the study of chronostratigraphy of the Precambrian after its separation from the Phanerozoic. Upon further study of the evolutionary history of the Precambrian Earth, applying new geodynamic and geobiological knowledge and information, a revised division of Precambrian time has led to the third conceptual progress on the study of Precambrian chronostratigraphy. In the current scheme, the Proterozoic Eon began at 2500 Ma, which is the approximate time by which most granite-greenstone crust had formed, and can be subdivided into ten periods of typically 200 Ma duration grouped into three eras(except for the Ediacaran Period). Within this current scheme, the Ediacaran Period was ratified in 2004, the first period-level addition to the geologic time scale in more than a century, an important advancement in stratigraphy. There are two main problems in the current scheme of Proterozoic chronostratigraphical division:(1) the definition of the Archean–Proterozoic boundary at 2500 Ma, which does not reflect a unique time of synchronous global change in tectonic style and does not correspond with a major change in lithology;(2) the round number subdivision of the Proterozoic into several periods based on broad orogenic characteristics, which has not met with requests on the concept of modern stratigraphy, except for the Ediacaran Period. In the revised chronostratigraphic scheme for the Proterozoic, the Archean–Proterozoic boundary is placed at the major change from a reducing early Earth to a cooler, more modern Earth characterized by the supercontinent cycle, a major change that occurred at ca. 2420 Ma. Thus, a revised Proterozoic Eon(2420–542 Ma) is envisaged to extend from the Archean–Proterozoic boundary at ca. 2420 Ma to the end of the Ediacaran Period, i.e., a period marked by the progressive rise in atmospheric oxygen, supercontinent cyclicity, and the evolution of more complex(eukaryotic) life. As with the current Proterozoic Eon, a revised Proterozoic Eon based on chronostratigraphy is envisaged to consist of three eras(Paleoproterozoic, Mesoproterozoic, and Neoproterozoic), but the boundary ages for these divisions differ from their current ages and their subdivisions into periods would also differ from current practice. A scheme is proposed for the chronostratigraphic division of the Proterozoic, based principally on geodynamic and geobiological events and their expressions in the stratigraphic record. Importantly, this revision of the Proterozoic time scale will be of significant benefit to the community as a whole and will help to drive new research that will unveil new information about the history of our planet, since the Proterozoic is a significant connecting link between the preceding Precambrian and the following Phanerozoic. | MEI Mingxiang Kyawt Kay KHAING | 2016 | Acta Geologica Sinica(English Edition)2016，90，4： | 2 |
| 11 | 河南嵩山地区新元古界何家寨组微亮晶(臼齿)碳酸盐岩成因新认识显示文摘作为国际前寒武系碳酸盐岩研究的热点,微亮晶(臼齿)碳酸盐岩(简称MT)在前寒武纪古地理重塑、地层对比和古气候研究等方面具有重要研究意义,但对其成因机制的认识长期存在争论。华北克拉通南缘嵩山地区新元古界何家寨组发育大量MT沉积,被前人解释为地震液化的产物。文中对何家寨组MT发育层位进行了详细的形态描述、系统的微相分析和比较沉积学的研究,确定何家寨组MT沉积于碳酸盐缓坡沉积环境,发现MT具有早期成岩作用特征,其形态类型和宿主岩性、沉积环境之间存在密切关系。从多个方面对比探讨了MT微亮晶和地震“液化脉”之间的不同,明确指出,何家寨组MT的形成受到古海洋条件和沉积岩相的严格约束,具有鲜明的古环境意义,和地震没有必然的成因联系。 | 王振涛 李现根 | 2020 | 古地理学报2020，22，1： | 2 |
您所在的机构暂未开通此部分的功能，请联系管理员