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2010 Vol. 21, No. 3

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Paleofire Indicated by Polycyclic Aromatic Hydrocarbons in Soil of Jinluojia Archaeological Site, Hubei, China
邹胜利, 李仁成, 谢树成, 朱俊英, 王新君, 黄俊华
2010, 12(3) doi: 10.1007/s12583-010-0089-x
Abstract:
Combustion-derived and land-plant-derived polycyclic aromatic hydrocarbons (PAHs) have been investigated by using the GC-MS analysis in an ancient soil profile from Jinluojia (金罗家) archaeological site at Macheng (麻城), Hubei (湖北) Province, Central China. Retene, cadalene and si-monellite were proposed to be derived from contemporary land plants. The pyrolytic PAHs identified include fluoranthene, pyrene, benzofluoranthenes, benzo[e]pyrene and benzo[a]pyrene...
Detrital Zircon Geochronology andProvenance of Core Sediments in Zhoulao Town, Jianghan Plain, China
王节涛, 李长安, 杨勇, 邵磊
2010, 12(3) doi: 10.1007/s12583-010-0090-4
Abstract:
In our study, the U-Pb age spectrum of detrital zircons from terrigenous sediments is used to determine the sources. The Middle and Upper Reaches of the Yangtze River drain the western Yangtze craton and eastern Tibetan plateau, and take lots of sediments to the Jianghan (江汉) plain. Detrital zircons collected from Zhoulao (周老) core provide an ideal sample for the provenance studies. Here we report LA-ICP-MS U-Pb ages of 125 detrital zircons from one sand sample in the core sediments, which is recovered from a depth of 86.76–88.58 m and the paleomagnetic age is about 800 kaBP, in Zhoulao Town...
Effect of Volcanic Activities and CO2 Concentration on Summer Temperature in Middle Stratosphere, North Hemisphere
Qu Weizheng* (曲维政), Deng Shenggui (邓声贵), Huang Fei (黄菲), Liu Yingchen (刘应辰), Fan Ting (樊婷), Bai Yan (白燕)
2010, 12(3) doi: 10.1007/s12583-010-0091-3
Abstract:
Successive filtration and comparison show that the stratosphere air temperature in 10 hPa-layer of the Northern Hemisphere (NH) in July continuously increases, which is associated to the increases in greenhouse gases mostly CO2, volcanic activities, and solar activity, demonstrating the follows. (a) The increase in CO2 concentration is largely consistent with that of the stratosphere air temperature in 10 hPa-layer of the NH in July. However, the increase in the air temperature is not in a linear pattern, during which several cooling events interrupt...
Analysis of Depth-Diameter Relationship of Craters around Oceanus Procellarum Area
胡海艳, 杨瑞琰, 黄定华, 余兵
2010, 12(3) doi: 10.1007/s12583-010-0092-2
Abstract:
Studying the depth-diameter relationship of impact craters around the Oceanus Procellarum area together with values for simple crater, complex crater and basin confirms two inflections in the depth/diameter (d/D) curve. We classify impact craters to three types, which are simple crater, complex crater and basin. Using the most ‘pristine’ or deepest craters in the data, three kinds of depth-diameter relationships are determined: the linear fit for simple crater is d=0.126D+0.490 2; the best empirical power fit for complex crater is d=0.327 3D0.625 2; the best empirical power fit for basin is d=0.300 4D0.463 3, where d is the depth of the crater and D is the diameter of the crater, both in kilometers...
Characteristics of Subaerial Karstification and Late Reconstruction in the Dengying Formation, Sichuan Basin, Southwestern China
王国芝, 刘树根, 马永生, 徐国盛, 蔡勋育
2010, 12(3) doi: 10.1007/s12583-010-0093-1
Abstract:
Tectonic uplift at the end of Sinian resulted in the denudation of the Dengying (灯影) Formation on a different scale and the development of a great number of secondary dissolution vugs beneath the unconformity between Sinian and Cambrian. Geological and geochemical characteristics such as the development of caves, sinkholes, karst tubes and weathering crust, abrupt depletion and negative deflection of δ13C and δ18O in country rock and vug filling toward unconformity surface suggest that subaerial karstification is responsible for the development of secondary karst vugs within 150 m or so beneath the unconformity surface...
Organic Geochemical and Fluid Inclusion Evidence for Filling Stages of Natural Gas and Bitumen in Volcanic Reservoir of Changling Faulted Depression, Southeastern Songliao Basin
秦黎明, 张枝焕, 吴聿元, 冯如进, 昝灵
2010, 12(3) doi: 10.1007/s12583-010-0094-0
Abstract:
Recently, volcanic gas reservoirs in Yaoyingtai (腰英台) and Daerhan (达尔罕) tectonic belts in Changling (长岭) faulted depression of southeastern Songliao (松辽) basin have been discovered. Based on the compositions and isotopic values, the natural gas is characterized by high content of methane, low content of C2+, and C1/C1–5 beyond 0.95. Also, the natural gas contains nonhydrocarbons including carbon dioxide with the content from 20% to 40% and minor amount of N2. Combined with the isotopic values, the natural gas is generated by humic kerogen and coal-derived type, but in Daerhan, the natural gas is probably mixed by oil type gas...
Origin of Subsequent Condensate Pool in Lunnan Low Uplift, Northwest China
吴楠, 蔡忠贤, 刘显凤, 杨海军, 韩剑发
2010, 12(3) doi: 10.1007/s12583-010-0095-z
Abstract:
Lunnan (轮南) low uplift, where developed amounts of condensate pools in both Ordovician and Carboniferous reservoirs, locates in the north uplift of Tarim basin, Northwest China. Lunnan area has experienced intensive gas invasion since the Himalayan movement, causing multiple types of accumulation coexisting in the Ordovician reservoir. Geochemical evidence shows that these condensate oils are of low maturity (vitrinite reflectance levels near 1.0%) and the dominant component of the condensate gas is dry gas (the content of CH4 over 94%), which reflects that the condensate pool in Lunnan area is not the product of thermal cracking, but the subsequent accumulation derived from the phase fractionation...
Experimental Field Study of Movement Charateristics of Rock Blocks Falling down a Slope
黄润秋, 刘卫华, 周江平, 裴向军
2010, 12(3) doi: 10.1007/s12583-010-0096-y
Abstract:
The downslope movement of detached rock blocks along steep slopes is an important process endangering the safety of infrastructure along the foot of a slope and on the valley bottom, but only limited knowledge is available on the influence of various factors on the velocity and distance of movement of such blocks. We discuss the influence of the mass and shape of the rock blocks, the steep-ness of the slope, and the thickness of the overburden on the slope, on the distance of movement of rock blocks which was observed in 256 field experiments with differently shaped blocks from 3 different po-sitions on the slope with a height of 176 m...
Pretreatment of Diosgenin Wastewater Using Polyferric Sulfate and Cationic Polyacrylamide
梁震, 王焰新
2010, 12(3) doi: 10.1007/s12583-010-0097-x
Abstract:
Coagulation-flocculation process was applied in the pretreatment of diosgenin wastewater. Polyferric sulfate was used as primary coagulant and a cationic polyacrylamide (CPAM) was used as coagulant aid. Using jar test procedure, the influence of the main operating parameters, such as effluent pH and coagulant dosage in the coagulation performance was investigated. The effective pH was found to be in the range of 6.5–8.0 and coagulant dosage was 100 mg/L. Under the optimal conditions, 15% chemical oxygen demand (COD) removal efficiency was achieved and the residual turbidity was less than 20 NTU. The presence of CPAM substantially promoted the reduction of residual turbidity with the appropriate CPAM dosage in the range of 2–5 mg/L.
Well Logging Responses of UHP Metamorphic Rocks from CCSD Main Hole in Sulu Terrane, Eastern Central China
Luo Miao (骆淼), Pan Heping* (潘和平)
2010, 12(3) doi: 10.1007/s12583-010-0098-9
Abstract:
The lithologies of the Chinese Continental Scientific Drilling main hole (CCSD-MH) are mainly comprised of orthogneiss, paragneiss, eclogite, amphibolite, and ultramafic rocks. The statistical results of logs of CCSD-MH indicate that ultramafic rocks are characterized by very high CNL (neutron log) and very low GR (gamma ray log) and RD (resistivity log); eclogites are characterized by high DEN (density), VP (P-wave velocity) and PE (photoelectric absorption capture cross section); orthogneiss and paragneiss are characterized by high GR, U (uranium content), Th (thorium content), K (potassium content) and RD, and low DEN, PE, and CNL; logging values of amphibolite are between the logging values of eclogites and paragneiss...
Derivative-Based Techniques for Geological Contact Mapping from Gravity Data
Li Yuanyuan* (李媛媛), Yang Yushan (杨宇山), Liu Tianyou (刘天佑)
2010, 12(3) doi: 10.1007/s12583-010-0099-8
Abstract:
Gravity anomalies illuminate subsurface lithology and geological structure in three dimensions, which is vital for studies of concealed faults, sedimentary basins, basement lithology, and other geological targets. Although not all geological contacts correspond to lithological contacts, the contact mapping provides key information on structural regimes, deformation styles and trends. Many techniques for contact mapping have been developed....