ISSN:0141-6421    

DOI:10.1111/j.1747-5457.1984.tb00178.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

The results of a number of experiments simulating the early diagenesis of carbonate ooids are presented and discussed. consideratin of both inorganic and organic reactions indicate that the presence and maturation of organic matter i scritica. It is suggested matter, while the inorganic reactions are likely to be controlled by the by‐products of the maturation of the oraganic matter. In gernral the results obtained show a marked similarily to the geilogical situatio

ISSN:0141-6421    

DOI:10.1111/j.1747-5457.1984.tb00179.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

Published data from an organic geochemical study of Recent oolites from the Bahamas and teh kPersian Gulf suggest that petroleum‐bearing oolites may be the source, as well as the reservoir, of the hydrocarbons they contain. This paper advances a scheme for the generation of leached oolites with oomodic porosity, petroleum‐bearing oolites could be viewed as integrated source‐resrvoir

ISSN:0141-6421    

DOI:10.1111/j.1747-5457.1984.tb00180.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

The occurrence of oil in some fields of the Qattara Deprrssion is largely controlled by the lithological composition of the Lower Cretaceous succession. The lithologic percentage adn ratio; classifying, entropy and distance functions; entropy ratio, relative centre of gravity, variance, covariance adn relative standard deviation; adn tripartite and entropy facies parameters have been calculated for sections studied. They have then been correlated with optimum parameters, i. e. teh average composition fo four oil‐bearing sections. Similarity or departure of the calculated parameters from those of of the optimum composition facilttates delineation of areas favourable for finding oil.Thus, this tool provides a valuable means for the prospecting for and explorastion of new oil and gas deposits, as indicated in teh case study presente

ISSN:0141-6421    

DOI:10.1111/j.1747-5457.1984.tb00181.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

Petroleum reservoirs are known to depths of‐10 km, and their ages extend to ‐ 700 m. y. † Since ltemperature is important to petroleum‐forming processes, the thermal history of this region is analyzed. From the geologic record, average surface temperature values are derived for recent geologic time adn 2.5 b. y. BP. These data are applied to the Newton cooling law to obtain a value of 2.63×10‐11yr‐1for the heat transfer constant for the Earth surface/space system. This in turn, yield an approximate average cooling rate for the surface of 7°C per b. y. Profiles of average surface temperature over geologic time are constructed for high, middle and low latitudes. Respective initial average surface temperatures at these latitudes were 13.6°, 41.6° and 59.6°C. Two tests are applied to the cooling curves to cheek their validity. First, they are used with teh rate constant for the mantle outgassing of water vapor and the Clausius‐Clapeyron equation ot calculate the accumulation and average temperature of liquid surface water over geologic time. The results are consistent with teh geologic record pertaining ot the history of water‐borne sedimets, glaciation and life. Second, the calcualted thermal characteristics of the surface are compared with publushed date for the mantle. They agree to within 2%. The surface<10°C for the temperature change of a petroleum resrvoir buried at a depth of 10kkm over the past 700 m. y. The change for reservoirs of resrvoir age ot petroleum‐forming processes lies mainly in the increased opportunity for geologic change such as depth of burial or igneous actifity that would alter conditions

ISSN:0141-6421    

DOI:10.1111/j.1747-5457.1984.tb00182.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

In this, the second part of Dr. Meyerhoff's presentation, Carboniferous production from area outside the USSR is considered. The conclusions and references refer to both this paper and that published in the April issue.

ISSN:0141-6421    

DOI:10.1111/j.1747-5457.1984.tb00183.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

This paper deals with the influence of tectonic factors on teh distribution and generation of oil and gas accumulations in oil‐and gas‐bearing basins ancient platforms. Threee main platform evolutionary stages, with their corresponding structural‐formational associations, may be recognized; the petroleum potential of each stage is different.Important factors are: the intensity of subsidence; the areal distribution of individual formations, and the presence of sulphate‐saltis in teh section, formation regional seals.The influence of inversion processes in the development of “giant”l gas‐condensate accumulations is emphasized, adn the petroleum‐bearing basins of ancient platforms are classified according to their oil

ISSN:0141-6421    

DOI:10.1111/j.1747-5457.1984.tb00184.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

摘要:

To outline lthe process of formation of the Tethys Ocean and its developemt from teh Late Carboniferous (Hercynian) epeirogenic phase until teh end of the Cretaceous, (when this ocean started vanishing), an earlier proposed model, involving lithospheric uplift, stretching and developmetn f anastomosing normal faults, which was suggested to explain the thermotectonic evolution of the lKashmir basin, is extended to cover the region from Kashmir to Kempa Dzong (NE Silkkim).Basement subsidence curves show an overall exponential trend in agreement with teh common behaviour of passive margins. The anomalour Late Jurassic ‐ early Creataceous uplift of the marigin is difficult to explain wiht the available data; however, it seems likely to be related to the very restricted ocean‐floor spreading phase in early Late Creataceous time. The well preserved continental margin suggests a width of<500 km for the Tethys Ocean.The model and the inferred limited width of the Tethys Ocean have several implications for the evolution of the himalayas. For example: (1) the Main Central Thrust and Main Boundary Thrust are reactivated normal listric faults, which reversed their direction fo move, emt during the closing phase of the Tenthys Ocean; (2) the gravity high along the entire Higher Himalayas is due to the presence of transitional‐zone basic material, intruded during the rift phase; and (3) the limited width fo the Tethys Ocena does not support alleged large‐scale subduction along this belt.Finally, a few date (known and model‐derived) and conceptual constraints are pointed out. These must be considered in the evolultion of the Himalayas in general, and before in voing subduction in the Himalayas in particular. They include: the time required for passive margins to change to fracture boundaries; the north ward movement of India indicated by paleomagnetic data; th sinistral movement between norhtern and soutehrn continents; the p0osition of the Ladakh batholity within the Indus‐Tsansgpo Suture Zone; the 235+‐13Ma†age of a section fo this batholith; the occurrence of radiolarian chert within underformed beds; the suggested involvement of the Earth's rotational forces in plate‐tectonic driving mechanisms; and the possibility of many changes in teh spin velopcity of the Earth during the l

ISSN:0141-6421    

DOI:10.1111/j.1747-5457.1984.tb00185.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

ISSN:0141-6421    

DOI:10.1111/j.1747-5457.1984.tb00186.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY

ISSN:0141-6421    

DOI:10.1111/j.1747-5457.1984.tb00187.x

出版商:Blackwell Publishing Ltd    

年代:1984

数据来源: WILEY