排序方式: 共有35条查询结果,搜索用时 15 毫秒
1.
Chemical structure of immature sulfur-rich kerogen and composition of immature sulfur-rich crude oil in Jianghun oil field
have been studied. In molecular level, crude oil differs from thermolysed and chemolysed products of kerogen but does resemble
the bitumen in immature sulfur-rich source rock. Therefore, immature sulfur-rich oil may be derived from the expelling of
bitumen rather than from thermal cracking of kerogen. 相似文献
2.
3.
聚胞藻热模拟产烃研究 总被引:4,自引:0,他引:4
采用GC和GCMS对蓝藻聚胞藻原生烃类及热解烃类进行了分析.聚胞藻在250 ℃~300 ℃热解产气属于低熟气,以非烃气为主,产气组分参数反映了原核生物母质来源的特征.热解作用使其氯仿沥青“A”含量和烷烃含量大幅度提高.原生烷烃以正烷烃为主,主峰为nC17 .热解烷烃仍以低碳数正烷烃为主,主峰为nC17 ,反映了典型的藻类母质来源的烷烃特征.热解烷烃中还检出了丰富的二环倍半萜和五环三萜.五环三萜以C30 莫烷为主峰,并含有丰度较高的C30藿烯,表明生成的烃类属于低熟油 相似文献
4.
One strain of photosynthetic bacteria (PSB) was isolated from substrate sludge offresh-water fishpond. Influence of the use level of PSB culture solution, illumination condition,temperature, salinity, the use level of copper sulfate and dipterex on the purification efficiency was investigated. The results showed that the optimum use level of PSB culture solution was 10 mg/L,and the purification efficiency at illumination was higher than that at black, and if the temperature was lower than 15℃, or the use level of sodium chloride, copper sulfate and dipterex were higherthan 10 000 mg/L, 0.4 mg/L and 2.0 mg/L, respectively, the purification efficiency dropped distinctly. 相似文献
5.
Nitrate pollution of groundwater is paid more and more attention for its hazardous to environments and human health. A strain of DN11 was isolated from soil and used in the laboratory columns filled with various media for nitrate removal. The experimental results showed that DN11could reduce nitrate at different rates in different media under the aerobic condition. The mechanism for nitrate removal with DN11 is explained meanwhile. 相似文献
6.
Conclusion Lipids present in different modes of occurrence in lacustrine sediments vary obviously in their composition. The ester-bound
and amide-bound lipids are more likely to be derived from autochthonous input such as bacteria, algae and fungi in the lake,
and they were more stable than the free lipids in the process of early diagenesis. Bound lipids record the more actual information
about the paleoclimatic and paleoenvironmental changes. Amide-bound P-hydroxy fatty acids can be used as a fingerprint of
the past bacterial communities which is informative to the paleoenvironment. 相似文献
7.
本文从理论上探讨了地壳波导中传播的柱面电磁波,发现地震电磁波没有TM型波,这一特点可以用来识别地震电磁信号,引入衰减因子后,得到kr<1的区域,高导电层的衰减随频率的升高而减小,从而可以定性地解释观测到高频地震电磁信息的现象。 相似文献
8.
Based on the organic geochemical studies on two typical Carlin-type deposits in southwestern Guizhou, as well as the comparison
between the two deposits in terms of geological background, igneous rock, paleo-oilfield, lithofacies and paleogeographical
and geochemical features, two kinds of Carlin-type deposit were proposed: Lannigou Type and Getang Type. The former includes
Lannigou, Banqi and Yata gold deposits. These deposits are hosted by turbidite, geographically situated in the southwest of
the mineralized district, and related genetically to paleo-oilfields. The latter includes Getang, Zimudang and Dachang gold
(mercury and thallium) deposits, situated geographically in the northwest of the mineralized district where Emeishan basalt
commonly occurs. These deposits are associated with reduction of coaly organic matter. 相似文献
9.
Long-chain alkenones in Hotong Qagan Nur Lake sediments and its paleoclimatic implications 总被引:8,自引:0,他引:8
Sheng Guoying Cai Keqin Yang Xuexian Lu Jialan Jia Guodong Peng Ping’an Fu Jiamo 《科学通报(英文版)》1999,44(3):259-259
The long-chain alkenones present in the shallow sediment of Hotong Qagan Nur Lake in China are reported. According to the similarity of compositions and distributions of the alkenones determined commonly in the sediment section to those of marine sediment, it is reasonably referred that the alkenones might also originate from Prymnesiophyceae. In addition, the parameter U37k of alkenone is in positive correlation to δ18O values of authigenic calcium and magnesium minerals. This indicates that the parameter U37k of long-chain alkenone is also available to indicate paleoclimate of high-salinity alkaline lake. 相似文献
10.
Fig. . Variation in CTs/ 《科学通报(英文版)》2000,45(19):1742-1748
Distributions and geochemical significances of 18α(H)-neohopanes and of 17α(H)-diahopanes in oils from west Xialiaohe depression
of the Bohai Bay Basin have been studied. Relative abundance of 18α(H)-neohopanes and of 17α(H)-diahopanes can be effectively
used as maturity parameters, in a range of medium-high mature stage, based on consideration on sedimentary-organic facies
of source rocks. With a dual geochemical significance of maturity and sedimentary-organic facies, neohopane and diahopane
parameters can be well used in oil-source correlation and in petroleum population division. Formation, primary concentration
and preservation of precursors of rearranged hopanes are closely related to depositional conditions such as Eh-pH and clays
content. A series of probable diahopanes (series D) was detected in the oils, which exhibits a similar distribution pattern
and geochemical behavior as that of 17α(H)-diahopanes (series B). 相似文献