Trends in Micro-Crack Properties of Sedimentary Rocks in Loading and Unloading Mechanism

2017 ◽  
Author(s):  
H. Saleh ◽  
Q. Fisher ◽  
D. Price ◽  
D. Angus
Keyword(s):  
Sedimentary Rocks ◽  
Loading And Unloading

Direct Observation of Crystalline Ordering In Naturally Graphitized Carbon Produced by Low Grade Metamorphism

1977 ◽  
Vol 35 ◽  
pp. 162-163
Author(s):  
Thomas R. McKee ◽  
Peter R. Buseck
Keyword(s):  
Crystallite Size ◽  
Sedimentary Rocks ◽  
Carbonaceous Material ◽  
Low Grade ◽  
X Ray ◽  
Graphitized Carbon ◽  
Transmission Electron ◽  
Heat Treated ◽  
Commercial Carbon ◽  
Metamorphic Zone

Sediments commonly contain organic material which appears as refractory carbonaceous material in metamorphosed sedimentary rocks. Grew and others have shown that relative carbon content, crystallite size, X-ray crystallinity and development of well-ordered graphite crystal structure of the carbonaceous material increases with increasing metamorphic grade. The graphitization process is irreversible and appears to be continous from the amorphous to the completely graphitized stage. The most dramatic chemical and crystallographic changes take place within the chlorite metamorphic zone.The detailed X-ray investigation of crystallite size and crystalline ordering is complex and can best be investigated by other means such as high resolution transmission electron microscopy (HRTEM). The natural graphitization series is similar to that for heat-treated commercial carbon blacks, which have been successfully studied by HRTEM (Ban and others).

Stabilizing pyritic material

1989 ◽  
Vol 4 ◽  
pp. 244-248 ◽  
Author(s):  
Donald L. Wolberg
Keyword(s):  
Significant Contribution ◽  
Organic Materials ◽  
Sedimentary Rocks ◽  
Iron Sulfides ◽  
Decomposition Products ◽  
Iron Minerals ◽  
Pyrite Formation ◽  
Organic Sediments ◽  
Freshwater Environments

The minerals pyrite and marcasite (broadly termed pyritic minerals) are iron sulfides that are common if not ubiquitous in sedimentary rocks, especially in association with organic materials (Berner, 1970). In most marine sedimentary associations, pyrite and marcasite are associated with organic sediments rich in dissolved sulfate and iron minerals. Because of the rapid consumption of sulfate in freshwater environments, however, pyrite formation is more restricted in nonmarine sediments (Berner, 1983). The origin of the sulfur in nonmarine environments must lie within pre-existing rocks or volcanic detritus; a relatively small, but significant contribution may derive from plant and animal decomposition products.

Heel-Skin Microvascular Blood Perfusion responses to Sustained Pressure Loading and Unloading

1998 ◽  
Vol 5 (2-3) ◽  
pp. 227-233 ◽  
Author(s):  
HARVEY N MAYROVITZ ◽  
J O S H U A SMITH
Keyword(s):  
Blood Perfusion ◽  
Pressure Loading ◽  
Loading And Unloading

Comparative fracture of joints that strike parallel to structures in sedimentary rocks—Characterization and implications

2006 ◽  
Vol 55 (3) ◽  
pp. 113-127 ◽  
Author(s):  
Dov Bahat ◽  
Avinoam Rabinovich ◽  
Vladimir Frid ◽  
Peter Bankwitz
Keyword(s):  
Sedimentary Rocks

Heat production of sedimentary rocks in the Sichuan basin, Southwest China

2018 ◽  
Vol 52 (5) ◽  
pp. 401-413 ◽  
Author(s):  
Chuanqing Zhu ◽  
Ming Xu ◽  
Nansheng Qiu ◽  
Shengbiao Hu
Keyword(s):  
Heat Production ◽  
Sichuan Basin ◽  
Southwest China ◽  
Sedimentary Rocks ◽  
The Sichuan Basin

THE EFFECT OF LOCATION AND FACILITIES SERVICES USER SATISFACTION CONTAINER LOADING AND UNLOADING IN PORT OF INDONESIA IV (Persero) BRANCH MERAUKE

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Tarsisius Kana
Keyword(s):  
Customer Satisfaction ◽  
Significant Relationship ◽  
User Satisfaction ◽  
Service User ◽  
Hypothesis Test ◽  
Positive Influence ◽  
Coefficient Of Determination ◽  
Service Users ◽  
Significance Level ◽  
Loading And Unloading

The Influence of Location and Facilities Against Satisfaction of Container Unloading Service User at PT Pelabuhan Indonesia IV (Persero) Merauke Branch.This study aims to determine how much influence the location and facilities to the satisfaction of service users. Locations have indicators: access, visibility, traffic and facilities have indicators: organizational characteristics and objectives, land availability and space and space requirements, flexibility, aesthetic factors, communities and the environment, construction and operation costs while service user satisfaction has indicators: customer satisfaction , dimensions of customer satisfaction, confirmation of expectations, repurchase interest, willingness to recommend, customer dissatisfaction.The method used in this research is quantitative method by using the technique of processing descriptive data, data collecting technique with interviews, questionnaires and literature study. Sampling technique used incidental sampling. The measurement using likert scale and processed using SPSS version 23 program to calculate the validity and reliability test, calculate hypothesis test that is t test, f test and coefficient of determination. The result of research shows that location and facility variables together have a positive influence on service user satisfaction at PT Pelabuhan Indonesia IV (Persero) Merauke Branch. This can be proven from the result of F count 39.984> 3.11 with significance level 0.000 ≤ 0.05, then Ho is rejected Ha accepted. Itcan be concluded there is a positive and significant relationship between location and facility to the satisfaction of service users of loading and unloading of containers at PT Pelabuhan Indonesia IV (Persero) Merauke Branch.The result of research shows that location and facility variables together have a positive influence on service user satisfaction at PT Pelabuhan Indonesia IV (Persero) Merauke Branch. This can be proven from the result of F count 39.984> 3.11 with significance level 0.000 ≤ 0.05, then Ho is rejected Ha accepted. It can be concluded there is a positive and significant relationship between location and facility to the satisfaction of service users of loading and unloading of containers at PT Pelabuhan Indonesia IV (Persero) Merauke Branch.

Application of X-ray tomography method for estimation of drilling agents influence on sedimentary rocks in the process of borehole drilling and completion

2020 ◽  
Vol 6 ◽  
pp. 40-44
Author(s):  
О.V. Garshina ◽  
◽  
D.А. Кazakov ◽  
I.L. Nekrasova ◽  
P.А. Khvoshchin ◽  
...  
Keyword(s):  
Sedimentary Rocks ◽  
X Ray ◽  
Borehole Drilling ◽  
Tomography Method
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