松辽盆地南部两井东-木头南地区扶余油层物源分析

通过岩芯观察描述以及分析化验资料的综合分析,从重矿物组合、砂岩厚度及砂地比平面分布、沉积微相以及垂向厚砂体追踪等方面对物源方向进行了判断。研究表明:松辽盆地南部两井东-木头南地区扶余油层存在西南保康沉积体系和南部长春怀德沉积体系。并对每个沉积体系的影响范围和强度变化进行了综合分析和厘定。古物源与沉积体系具有良好的空间配置关系,决定了松辽盆地两井东-木头南地区扶余油层的沉积体系分布格局。沉积物源的研究将有助于油气勘探的部署。     

Isotope chronological trace of granite gravel in Hefei Basin

The discovery of granite gravel in Hefei Jurassic backland basin, which came from the Dabie Shan or North Huaiyang, has a great significance for probing into uplift and exhumation of the Dabie orogenic belt. Lithochemical and isotope chronological analyses on the granite gravel in the Sanjianpu Formation and the Fenghuangtai Formation in Jinzhai County prove that post-orogenic granite was developed in the major provenance of the Hefei Basin; that is, Dabie Shan or North Huaiyang. Discordant lower intersection point age of zircon U-Pb of granite gravel is about 214 Ma, and⁴⁰Ar/³⁹Ar age of muscovite about 196 Ma, K-Ar age of K-spar about 181 Ma. The former is the diagenetic age of the sample, and the latter two represent the sealed ages of muscovite and K-spar respectively. The age of sedimentary rocks in which a lot of granite gravels appear in the sedimentary section may represent the newest age of the exhumation of the granite body, so we assume that the age is 166 Ma. Therefore, we calculated the uplift rates of the granite body from Late Triassic to early Middle Jurassic; that is about 0.08 km/Ma and 0.4–0.3 km/Ma in the early slowly uplifting stage and later fast uplifting stage respectively, after the formation of the body at 214 Ma. These results are basically identical to the uplifting ages of the Dabie ultrahigh pressure metamorphic (UHPM) belt and the North Huaiyang thrust belt.     

东营凹陷滨南地区Es3下亚段湖相浊积岩精细物源研究

针对滨县凸起南坡沙三段浊积岩物源研究薄弱的问题,通过查阅前人的研究,利用岩心样品化验数据及钻井、测井资料,通过稀土元素分析法、砂岩组分分析法、沉积法三个方面进行精细物源分析。稀土元素分析结果结合岩屑特征的认识,认为研究区的母岩主要为变质岩,也存在少量火山岩母岩和沉积岩母岩。通过分析样品平面分布特征,结合砂体厚度以及砂泥比等直线图的认识,认为研究区存在两个主要物源方向,并对每个沉积方向的影响范围和强度变化进行了综合分析和厘定。研究区物源的研究有利于正确认识浊积岩的沉积特征,划分浊流沉积体系。     

Carbon isotopic study of individual n-alkanes in certain modern organisms

Simulation experiment was carried out on all kinds of modern organisms significant to oil-gas generation and the C-isotopic values of n-alkanes in different organisms. The distribution characteristics of individual n-alkane isotopes are studied. The experimental results supply important clues in biological provenance of n-alkanes in sedimentary organisms.     

基于区块链的数据溯源可信查询方法

针对区块链数据溯源系统中轻节点验证溯源信息时面临的存储问题,引入一种优化Merkle树动态追加性能的数据结构Merkle山脉(Merkle mountain range,MMR),将区块链上完整的区块头存入MMR;提出一种溯源数据高效可信的验证方法,降低了区块包含证明所需信息的大小.在此基础上,设计了一种基于区块链的数...     

嘉陵江三大水系边滩沉积物磁性特征及其物源指示意义

通过2009年夏季采集的嘉陵江三大水系边滩沉积物样品的磁性测量,结合粒度分析,探讨了三江沉积物磁学特征的差异.结果表明,三大水系沉积物中磁性矿物除磁铁矿外,还含有丰富的赤铁矿,反映了四川盆地中生代紫色砂页岩作为嘉陵江水系泥沙来源的特点.嘉陵江干流由于上游黄土的输入,其磁铁矿对样品磁性特征的贡献最为显著.磁性参数x,SI...     

Seasonal variations in the Sr-Nd isotopic compositions of suspended particulate matter in the lower Changjiang River: Provenance and erosion constraints

Suspended particulate matter samples were collected monthly for more than 2 years in Nanjing,China to examine seasonal changes in the Sr-Nd isotopic compositions of the lower Changjiang River(CR).The results indicate that the 87Sr/86Sr ratios of the samples ranges from 0.725352 to 0.738128,and the values ofεNd(0)ranges from-10.55 to-12.29.The Sr-Nd isotopic compositions show distinct seasonal variations.The samples had lower 87Sr/86Sr ratios and higherε Nd(0)values during the flood season than the dry seasons.The seasonal variations primarily reflect the controls of provenance rocks and erosion in different sub-catchments.The relative decrease in 87Sr/86Sr ratios and the increase inε Nd(0)values during the flood season may reflect an increasing in the mechanical erosion rate in the upper basin and the contribution of more sediment from the upper reaches.The end member values of 87Sr/86Sr andε Nd(0)of the samples were 0.728254 and?11.26,respectively.     

Radiometric dating of sediments derived from metamorphic rocks of the Dabie orogenic belt in the Jurasic and Early Cretaceous

Using isotopic dating of tuff, heavy mineral and lithofacies, correlation of Jurassic strata on the northern margin of the Dabie orogenic belt (DOB) has been enabled in the Fenghuangtai, Zhougongshan, Maotanchang and Jingangtai formations, which might be as young as Early Cretaceous. Depositional systems have been interpreted as mainly alluvial fan, braided stream and overbank, secondarily fan-delta and lacustrine. The palaeocurrent systems of the Jurassic-Cretaceous basins can be divided into two classes: one transverse adjacent to the southern margin, the other longitudinal close to the middle flowing from west to east. Mesozoic sedimentary source rocks are mainly from the DOB and, according to their geochemistry, experienced evolution in a volcanic arc tectonic setting. The Jurassic-Cretaceous strata have been subdivided into four Chronosomes, and their overlapping progressively from east toward west implies that exhumation of the DOB characterized diachronous. Based on stratigraphic evidence from eclogite conglomerates found in the Maotanchang and Fenghuangtai formations, the first exposure of UHP (ultrahigh pressure) rocks in the DOB occurred in Jurassic-Lower Cretaceous time. Further, phengites and Triassic zircons found in the Lower Jurassic Fanghushan Formation suggest that denudation began in the Early Jurassic.     

基于报备池和模版的网格记账溯源服务

提出一种网格记账溯源服务(Accounting Provenance Service,APS),针对网格记账数据的描述和获取,分别采用模版和报备池/动态报备组的方法,并分析APS在ChinaGrid中的潜在应用场景.研究结果表明,APS能将记账数据的采集独立于上层异构的记账策略,灵活地应用于各种记账背景,而且在记录单个网格成员记账行为的同时可以重现多个网格成员参与的分布式流程现场(如工作流作业的执行),提供记账事件的“溯源”功能,防止网格成员的虚假行为.     

南盘江盆地中三叠统复理石的物源和沉积构造背景分析

利用数据统计分析方法,对岩石薄片数据、古水流数据、岩石化学数据等进行了统计分析,在此基础上研究了南盘江盆地中三叠统物源和沉积构造背景.结果表明:中三叠统南盘江盆地古水流方向为北西西方向;沉积物主要来源于盆地一侧的再旋回造山带;再旋回造山带应该在盆地的东南方向;沉积构造背景以大陆岛弧为主,兼有活动陆缘的性质.