塔里木盆地晶包有机质的地球化学性质及其应用   总被引：2，自引：0，他引：2  

范善发  周中毅  解启来  潘长春 《矿物岩石地球化学通报》1996,(2)

塔里木盆地晶包有机质的地球化学性质及其应用范善发，周中毅，解启来，潘长春（中国科学院广州地球化学研究所．广州５１０６４０）关键词晶包有机质，塔里木盆地，二次生烃，生物标志物碳酸盐岩的可溶有机质主要为沥青Ａ和晶包有机质，前者是用溶剂抽提碳酸盐岩样品获得...  相似文献   

气相色谱法测定岩矿中有机碳无机碳及石墨碳     

杨翼华  朱永昌 《岩矿测试》1996,15(2):124-128134

介绍了测定岩矿样品中不同形态碳的方法。样品中加入ＭｎＯ２作氧化剂，在气相色谱仪内热解，测定结果是总碳。有机碳、石墨碳是由样品分别除去碳酸盐碳、碳酸盐碳与有机碳后，按总碳测定法测出。无机碳（碳酸盐碳）是在气相色谱仪密封系统内加酸分解碳酸盐，不用附加系统分离Ｈ２Ｏ与ＣＯ２，直接经色谱柱分离测定。也可分别测定总碳、有机碳或无机碳，用差减法计算无机碳或有机碳。  相似文献   

Implications of ozone depletion for surface-water photochemistry: Sensitivity of clear lakes   总被引：1，自引：0，他引：1  

Norman M. Scully  Warwick F. Vincent  David R. S. Lean  William J. Cooper 《Aquatic Sciences - Research Across Boundaries》1997,59(3):260-274

Increased ultraviolet-B radiation (UV-B) in aquatic ecosystems brought about by stratospheric ozone depletion may result in increased formation rates of photochemical reaction products in the surface waters of aquatic ecosystems. In this study, the potential impact of increases in lower wave-length radiation on the formation of hydrogen peroxide (H₂O₂) and singlet oxygen (¹O₂) was modelled for lakes over a range of dissolved organic carbon (DOC) concentrations. The impact of increased UV-B radiation on the production of carbon monoxide (CO) was also calculated for two humic stained systems. The relative increases of H₂O₂ and¹O₂ production were greater in the clear lakes (70% increase in photochemical reaction rates near the surface) than the coloured systems (25%). Production of CO in the study sites also increased under depleted ozone conditions implying increased DOC losses to the overlying atmosphere.  相似文献   

An evaluation method of hydrocarbon generating potential of highly mature and over-mature marine carbonate   总被引：2，自引：0，他引：2  

Keming Cheng  Zhaoyun Wang 《中国科学D辑(英文版)》1997,40(1):81-90

How to restore the residual organic carbon and residual hydrocarbon-generating potential is discussed based on the hydrocarbon degradability of source rock. The results indicate there is linear function relationship between the restoring coefficient of residual organic carbon (K_c) and the vitrinite reflectance (R _o%) of various kinds of source rock, but the relationship is secondary functional between the restoring coefficient of residual hydrocarbon-generating potential (K_s) and the vitrinite reflectance (R _o%). It is pointed out thatKc = (1 -Dresidual)/(1 -D _primary),Ks= Kc (D _primary/D _residual). The restoration of residual organic carbon and hydrocarbon-generating potential of the Cambrian and Ordovician highly mature marine carbonate in the Tarim Basin and North China region shows that the lower limit value of hydrocarbon generating potential and the organic matter abundance of carbonate source rock are basically the same as that of clastic rock. The technical difficulty in hydrocarbon generating evaluation of highly mature and overmature carbonate is solved.  相似文献   

Direct determination of the aliphatic carbon content of individual macerals in petroleum source rocks by near-infrared microspectroscopy     

A.K. Blob  J. Rullktter  D.H. Welte 《Organic Geochemistry》1988,13(4-6)

In order to determine the aliphatic carbon content in sedimentary organic particles near-infrared (NIR) microscope spectroscopy has been employed for the first time. An ordinary lens microscope photometer common for vitrinite reflectance measurements has been modified to detect hydrocarbon absorbance differences with a spatial resolution of about 30 μm.Microscopic studies of natural and artificial samples under reflected light condition were shown to be unsuitable for quantitative aliphatic C--- determination. Transmitted light measurements ofliptinites in polished thin sections, however, could be calibrated against synthetic polymer blends without exact knowledge of the sample thickness. In contrast to the established microscopic techniques for characterizing coal and petroleum source rocks NIR microspectroscopy is able to follow the chemical alterations of liptinites directly with comparatively low cost.  相似文献   

Distribution of particulate organic carbon in the central Arabian Sea     

N B Bhosle  V M Dhople  A B Wagh 《Journal of Earth System Science》1988,97(1):35-47

Particulate organic carbon (POC) of 161 water samples collected from 8 depths (surface to 1000 m) at 21 stations was measured. The POC concentrations ranged from 154 to 554 ¼g per litre at the surface and decreased in the upper 300 m water column. At greater depths (> 300 m), POC concentrations increased and were similar (145 to 542 ¼g1^?1) to those observed at surface. Deep water POC maximum was embedded within the oxygen minimum layer and was also associated with high phosphate-phosphorus. The POC contents increased, whereas oxygen decreased as the distance away from the shore increased. Phytoplankton biomass was a major source of POC. The observed pattern of POC is discussed with respect to some physicochemical and biological factors.  相似文献   

层控矿床有机地球化学初步研究     

胡明安 《地球科学》1988,(2)

地史上由生物死亡后变成的各种有机物质会遭到各种地质作用的改造,尤其是热液活动、岩浆侵入、放射性元素蜕变以及构造变动等地质因素所引起的热能,会使矿床中(主岩中)的有机物出现成熟异常现象。通过对某些层控矿床中有机物质的研究,可以解释成矿物质的来源、沉淀富集机理、含矿热液运移路线和主岩的沉积环境,并且可以指示矿体的大致分布范围,指导找矿勘探。  相似文献   

有机质的热液成熟作用在云南金顶铅锌矿床形成过程中的意义   总被引：16，自引：0，他引：16  

胡明安 《地球科学》1989,14(5):503-512

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Cross polarization, magic-angle spinning C nuclear magnetic resonance spectroscopy of soil humic fractions     

C. Saiz-Jimenez  Bruce L. Hawkins  Gary E. Maciel   《Organic Geochemistry》1986,9(6)

Cross polarization, magic-angle spinning ¹³C nuclear magnetic resonance spectroscopy was used to characterize humic fractions isolated from different soils. The acid fractions are more aromatic than the humin fractions, probably due to the higher polyssaccharide content of humins. However, fulvic acid fractions are more aromatic than the corresponding humic acid and humin fractions. These results can be interpreted in terms of the isolation procedure, because the high affinity of Polyclar AT for phenols results in higher aromaticities as compared with other isolation methods (e.g. charcoal).  相似文献   

Oxygen-containing functional groups in land-derived humic acids—II. Changes in the oxygen distribution of humic acids during early diagenesis as revealed by derivatization methods     

P. Pillon  J.M. Portal  B. Gerard  P. Jeanson  L. Jocteur-Monrozier   《Organic Geochemistry》1986,9(6)

Extensive functional group analyses were performed on humic acids representative of eight increasing depth levels from a core drilled in the Mahakam delta (East Kalimantan, Indonesia). Oxygen amounts decrease observed during early diagenesis was related chiefly to loss of hydroxyl (lignol?) groups. Comparison between upper and deeper levels shows the following variations: hydroxyl group abundances go from 19 to 6% of humic oxygen. Identified functional groups amounts represent 47 to 32% of weight of moisture- and ash-free humic acids. No evidence of decarboxylation of humic material was detected.  相似文献