In the latter type δ 18 O and δ D are more than -7 00‰ and -55 0‰ respectively, δ 37 Cl approximates to the value of marine water and 14 C ages are more than 10 000a (corrected). The amount of sea water in saline water is more than 38 0%.
The features of fluid inclusions show that the gas field water is marine water with a salinity of(4.3～17.2)%(NaCl)and pH>8. The gas is composed mainly of CH_4 and(CO +CH_4)/ CO_2 ratio is high.
The ERs of α HCH in the marine water vary from 0.91to 0.80 in early spring and early summer, indicating that the marine microbial degradation of α HCH has enantioselectivity and (+)α HCH is degraded preferentially.
A scanning micro-electrode like a needle was used to measure the potencial distribution on the speciment surface of 921 steel and it's welding joint in the marine water and study the behaviour of the active process of localized corrosion.
In this paper, chlorofluorocarbon tracers, such as CFC-11, CFC-12, CFC-113, CCls4 and SFs6 were introduced. The applications of chlorofluorocarbon chemical tracer technique in study on the movement and the age of marine water masses, and air-sea exchange were expounded.
Enantioselective breakdown of α Hexachlorocyclohexane(HCH) and concentrations of α、β、γ、δ HCH isomers in Xingang Harbour marine water and Haihe River estuary water of Tianjin.
The concentrations of α、β、γ、δ HCH in both waters were also determined. The total HCH concentration of these two waters met the National Marine Water Quality Standard I (GB3097 82)and the National Drinking Water Quality Standard(GB5749 85) respectively.
and (3) trace elements correlated with ash mass fraction are Rb, Ga, Ho, Ba, Zn, Y, Cs and Tb. The distributions and affinities of trace elements in the vertical profile of 9 coal are correlated with the reduction_oxidation of the swamp and prove to be affected by the sulphur mass fraction of the coals and the marine water.
This paper aims at giving an account of the distribution of the Ordovician sedi-ments in North China,with brief reference to fossil zones and chronological relation-ship of nautiloids to graptolites and other invertebrate fossils.The history of sedimen-tary development and the distribution of the Polydesmia fauna indicate the fact thatin the Beianzhuang age immense marine water rapidly transgressed the Yellow Riverrealm and also spread over a vast land of Gan-Qing-Zang realm.One of the remar-kable events...
This paper aims at giving an account of the distribution of the Ordovician sedi-ments in North China,with brief reference to fossil zones and chronological relation-ship of nautiloids to graptolites and other invertebrate fossils.The history of sedimen-tary development and the distribution of the Polydesmia fauna indicate the fact thatin the Beianzhuang age immense marine water rapidly transgressed the Yellow Riverrealm and also spread over a vast land of Gan-Qing-Zang realm.One of the remar-kable events in the Beianzhuang age is that numerous actinoceroids made their firstappearance.The actinoceroid fauna has relations with those in Australia and NorthAmerica.A brief discussion is also made on the correlation of the Yellow River realm,the correlation of North China to South China and the wide distribution of the YellowRiver type,which,together with the Yangtze River type and the Pearl River type,constitutes three principal bio-sedimentary types in China and may be more or less usedas an approach to the analysis of bio-sedimentary provinces of the world.The bio-sedimentary provinces are controlled distributionally by the paleo-tectonic factor and bythe palaeolatitude,with Central Pacific and Northwest Africa as the North Pole andthe South Pole respectively.The Yellow River type was in the low latitudinal area;its distributional discontinuity may be related,in paleotectonic sense,to the stable shal-low sea.The Yangtze River type,equivalent to the Baltic one,ranged a little lower inthe middle latitudinal area and in the sub-stable shallow sea.The Pearl River type,cor-responding to the British one,was in the middle latitudinal area and in the mobileisland arc.
(1)The electroretinograms of the intact eyes of the round scad Decapterusmaruadsi and the Japanese mackerel Pneumatophorus japonicus(the main phototacticmarine fishes in China)were recorded and analysed.The waveforms of both speciesreveal the typical features of mixed retina.The ERGs were extremely sensitive toanoxia;after arresting the circulation of marine water for only a few minutes theb-wave rapidly became smaller leading finally to extinction while PⅢ and c-wavestill remained.(2)The relation between...
(1)The electroretinograms of the intact eyes of the round scad Decapterusmaruadsi and the Japanese mackerel Pneumatophorus japonicus(the main phototacticmarine fishes in China)were recorded and analysed.The waveforms of both speciesreveal the typical features of mixed retina.The ERGs were extremely sensitive toanoxia;after arresting the circulation of marine water for only a few minutes theb-wave rapidly became smaller leading finally to extinction while PⅢ and c-wavestill remained.(2)The relation between the amplitude of scotopie b-waves and light intensitycan be adequately expressed by the non-linear equation V/V_(max)=I~a/(I~a+K~a),whereV is the amplitude elicited by light intensity Ⅰ,V_(max) is the maximum amplitude,aand K are constants.(3)After preexposure to high intensity light,the threshold for eliciting a constantb-wave in the Japanese mackerel returned to the dark-adapted level in a period of 60 min.,which was in striking contrast to the round scad.The course of dark adaptationof the latter was quite slow,usually more than 3 hr.(4)During the course of light adaptation the changes in amplitude of b-waveshave been shown to be of two different kinds.In the course of weaker light adaptationthe amplitude of b-wave gradually decreased,but if the intensity of the adapting lighton the cornea was higher than 40μw/cm~2,the amplitude would increase instead.Thelatter phenomenon has been interpreted by adaptational characteristics of the photopicsystem.(5)The curves relating log incremental threshold to log intensity of adaptinglight for both species show similar features.The relation was quite linear,if theintensity of adapting light exceeded a certain level.Under the weaker light adaptation,however,the change in intensity of adapting light failed markedly to alter theincremental threshold.Curves obtained by using light stimuli of different wave lengthsshowed an intersecting tendency as adapting light increased,indicating the existenceof several sensory systems with various spectral sensitivities.
This paper gives a rough review of Mesozoic and Cenozoic fossil fishes reportedrecently from East China. Here, the fossil fishes are divided approximately into twogroups: freshwater fishes and fishes probably related to marine water. According tothese two different groups of fossil fishes the corresponding deposits are referred to astransitional and freshwater respectively. And it is suggested that the Mesozoic andCenozoic oil-bearing strata of East China were formed under the environment of thealternation...
This paper gives a rough review of Mesozoic and Cenozoic fossil fishes reportedrecently from East China. Here, the fossil fishes are divided approximately into twogroups: freshwater fishes and fishes probably related to marine water. According tothese two different groups of fossil fishes the corresponding deposits are referred to astransitional and freshwater respectively. And it is suggested that the Mesozoic andCenozoic oil-bearing strata of East China were formed under the environment of thealternation of transitional and freshwater conditions.
marine water
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