Application of seismic tomography for detecting structural faults in a Tertiary Formation

Seismic refraction technique is an increasingly useful geophysical tool for geotechnical studies in civil engineering work including the mapping of different soil formation of subsoil and detection of the bed rock. Additionally, wave velocity is a key parameter which correlates directly with significant geotechnical parameters of soils and rocks. Today, the evolution of the measurement technique in the field and the data processing allows to obtain tomographic images which increases its potential for applications to evaluate structuration of rock mass. This work describes the basic principles of seismic tomography and a case history of an application in civil works used to detect hidden faults in the sedimentary Gatun formation at the north of Panama. The correlation between the seismic profile and geologic profile obtained from boreholes showed very good agreement. Subsequent directed boreholes performed at the site confirmed the position and nature of the faults detected.

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Electron microscope studies of minerals: phase boundaries in an extremely slowly cooled clinopyroxene (augite)

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1983.0049 ◽

1983 ◽

Vol 387 (1792) ◽

pp. 21-30 ◽

Cited By ~ 1

Keyword(s):

Phase Interface ◽

Intermediate Formation ◽

High Resolution Electron Microscopy ◽

Cooling History ◽

The North ◽

North Side ◽

Resolution Electron ◽

History Of ◽

Ambient Surface ◽

Good Agreement

High resolution electron microscopy has been used to study the nature of exsolution lamellae that developed during extremely slow and prolonged cooling and depressurization of an aluminium rich augite (high Ca clinopyroxene) taken from a layer of garnet-augite rich gneiss that outcrops on the north side of Scourie Bay, Sutherland, northwest Scotland. The parent clinopyroxene structure evolved with an average cooling rate of ca . 6 x 10 -6 K per year and an average depressurization rate of ca . 0.75 Pa per year over a span of ca . 2 x 10 9 years between 3.0 x 10 9 and 1.0 x 10 9 years ago, and was subsequently stored at close to ambient surface conditions. Three sets of lamellae, which probably formed mainly during the middle of this evolution, were identified as amphibole, pigeonite and hypersthene. Coherent amphibole lamellae, ca . 10 nm thick, exsolved parallel to (010) of the host augite whereas hypersthene formed thicker lamellae 150-250 nm wide, parallel to (100) augite. Again the phase interface is coherent but contains ledges, a few lattice spacings wide, of a pigeonite structure suggesting that the growth of the hypersthene lamellae proceeded via the intermediate formation of pigeonite. Pigeonite forms ca . 90 nm thick lamellae, which extend parallel to an irrational plane (7.96, 0, 1) of host augite at 12° to (100) augite, yet at the same time maintains a coherent interphase boundary. The angle between lamellae of this type and (100) of the host augite is known to be dependent upon composition of the host augite. The quoted value indicates a (Fe+Mn)/(Fe+Mn+Mg) ratio of 0.30 ± 0.05, in good agreement with microprobe data for the host augite, which fall in the range 0.372–0.382. The micrographs also indicate that hypersthene lamellae precede amphibole. The above observations have enabled the relation between the phases and the cooling history of the rock to be established.

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Seismic wide-angle constrains on the structure of the northern Sicily margin and Vavilov Basin: implications for the opening of the Tyrrhenian back-arc basin

10.5194/egusphere-egu2020-5130 ◽

2020 ◽

Author(s):

Ingo Grevemeyer ◽

Cesar Ranero ◽

Nevio Zitellini ◽

Valenit Sallares ◽

Manel Prada

Keyword(s):

Continental Crust ◽

Seismic Refraction ◽

Seismic Profile ◽

Passive Margin ◽

P Wave ◽

Tyrrhenian Sea ◽

Wide Angle ◽

Central Mediterranean ◽

The North ◽

Back Arc

<p>The Tyrrhenian Sea in the central Mediterranean Sea was form by Neogene slab roll-back of the retreating Ionian slab about 6 to 2 Myr ago. Yet, little is known about the structure of its southern margin off Sicily as well as back-arc extension and spreading in the southern Tyrrhenian Sea to the north of Sicily. The Sicilian margin is generally classified as a passive margin bounding a young back-arc basin. However, focal mechanisms from regional earthquakes suggest that the margins suffers presently from compressional tectonics. New seismic refraction and wide-angle data were collected along seismic profile WAS4 during the CHIANTI survey of the Spanish research vessel Sarmiento de Gamboa in 2015. The profile runs from the centre of the Tyrrhenian Sea &#8211; the Vavilov Basin &#8211; across the margin of Sicily, approaching the Gulf of Castellammare to the northwest of Sicily. Reanalyzed multi-channel seismic data supports compressional tectonics across a small basin paralleling the coastline of Sicily, revealing recent inversion of the Tyrrhenian Basin. Offshore of Sicily WAS4 indicates a roughly 120-140 km wide domain showing seismic P-wave velocities characteristic for continental crust (Vp ~4-6.7 km/s) and a base of crust defined by a wide-angle Moho reflection. Continental crust reaches a maximum thickness of 22 km to the north of the Gulf of Castellammare and is thinning to ~9 km to the north of the Ustica Ridge. The compressional belt occurs in continental crust to the south of Ustica Ridge. In the Vavilov Basin, a lithosphere was sample where seismic P-wave velocity increases from approx. 3-4 km/s to 7.5 km/s. This velocity depth-distribution clearly shows profound similarities to serpentinized mantle and hence un-roofed mantle. Thus, seismic constrains support results from Ocean Drilling Program (ODP) hole 651A, which sample serpentinized peridotites in the Vavilov Basin. The transition between serpentinized mantle and continental crust is rather abrupt. Thus, within a ~10 km wide transitional domain, continental crust with a thickness of~ 9 km is juxtaposed against un-roofed mantle. All available data from the Tyrrhenian Sea support wide-spread mantle exhumation in the Vavilov Basin. Therefore, the Tyrrhenian Sea provides a rather different structure when compared to marginal basins in the Western Pacific and hence may not have supported a mid-ocean ridge-type spreading system opening the basin.</p>

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Ras al Khaimah: further archaeological discoveries

Antiquity ◽

10.1017/s0003598x00150070 ◽

1976 ◽

Vol 50 (200) ◽

pp. 216-222

Author(s):

Beatrice De Cardi

Keyword(s):

United Arab Emirates ◽

The State ◽

Focused Attention ◽

North East ◽

The North ◽

History Of ◽

The City

Ras a1 Khaimah is the most northerly of the seven states comprising the United Arab Emirates and its Ruler, H. H. Sheikh Saqr bin Mohammad al-Qasimi, is keenly interested in the history of the state and its people. Survey carried out there jointly with Dr D. B. Doe in 1968 had focused attention on the site of JuIfar which lies just north of the present town of Ras a1 Khaimah (de Cardi, 1971, 230-2). Julfar was in existence in Abbasid times and its importance as an entrep6t during the sixteenth and seventeenth centuries-the Portuguese Period-is reflected by the quantity and variety of imported wares to be found among the ruins of the city. Most of the sites discovered during the survey dated from that period but a group of cairns near Ghalilah and some long gabled graves in the Shimal area to the north-east of the date-groves behind Ras a1 Khaimah (map, FIG. I) clearly represented a more distant past.

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D. I. Mendeleev’s “cherished thoughts” on foreign trade and “proper protectionism”

Voprosy Ekonomiki ◽

10.32609/0042-8736-2020-9-120-139 ◽

2020 ◽

pp. 120-139

Author(s):

T. N. Belova

Keyword(s):

Foreign Trade ◽

Russian Empire ◽

Foreign Trade Policy ◽

Basic Principles ◽

Industrial Economy ◽

The North ◽

Russian Economy ◽

American Scholar ◽

The Russian Empire ◽

Competition Growth

Foreign trade policy and its role in the economic growth of the national economy are considered through the prism of history and comparison of the formation of the industrial economy in the Russian Empire and the North American United States. The author compares the protectionism of D. I. Mendeleev, described in his economic works, and the free trade thinking of the American scholar W. Sumner, who formulated the “misconceptions” of protectionism. Mendeleev’s proper protectionism is grounded on the basic principles (incentivizing internal competition, growth of consumption, bringing up of new industries ), which are relevant for contemporary Russia. The author gives a typical example of the formation and decline of the factory industry using the case of mirror factories in the Ryazan province. These historical analogies, the paper argues, are necessary for the correct assessment of the current situation and for coming up with valid solutions aimed at the development of the Russian economy.

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Sequencing Analysis and Phylogenetic Tree of HPV Isolated from Breast Cancer Patients at Thi-Qar Province/Iraq

10.32792/utq/utjsci/vol7/2/10 ◽

2020 ◽

pp. 37-40

Keyword(s):

Nucleotide Sequence ◽

Phylogenetic Tree ◽

Evolutionary Relationship ◽

Nucleotide Sequencing ◽

Sequencing Analysis ◽

Breast Cancer Patients ◽

The North ◽

Formalin Fixed Paraffin ◽

Formalin Fixed Paraffin Embedded ◽

History Of

Genetic variety examination has demonstrated fundamental to the understanding of the epidemiological and developmental history of Papillomavirus (HPV), for the development of accurate diagnostic tests and for efficient vaccine design. The HPV nucleotide diversity has been investigated widely among high-risk HPV types. To make the nucleotide sequence of HPV and do the virus database in Thi-Qar province, and compare sequences of our isolates with previously described isolates from around the world and then draw its phylogenetic tree, this study done. A total of 6 breast formalin-fixed paraffin-embedded (FFPE) of the female patients were included in the study, divided as 4 FFPE malignant tumor and 2 FFPE of benign tumor. The PCR technique was implemented to detect the presence of HPV in breast tissue, and the real-time PCR used to determinant HPV genotypes, then determined a complete nucleotide sequence of HPV of L1 capsid gene, and draw its phylogenetic tree. The nucleotide sequencing finding detects a number of substitution mutation (SNPs) in (L1) gene, which have not been designated before, were identified once in this study population, and revealed that the HPV16 strains have the evolutionary relationship with the South African race, while, the HPV33 and HPV6 showing the evolutionary association with the North American and East Asian race, respectively.

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North American Association for the Study of Religion (NAASR)

Bulletin for the Study of Religion ◽

10.1558/bsor.v44i2.27304 ◽

2015 ◽

Vol 44 (2) ◽

pp. 29-30

Author(s):

Matt Sheedy

Keyword(s):

North American ◽

American Association ◽

The North ◽

History Of

I interviewed Russell McCutcheon back in March 2015, about his new role as president of the North American Association for the Study of Religion (NAASR), asking him about the history of the organization, goals for his tenure, and developments for NAASR’s upcoming conference in Atlanta in November 2015.

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On the Publishing Infrastructure of the University and its Construction Principles

Bibliotekovedenie [Library and Information Science (Russia)] ◽

10.25281/0869-608x-2010-0-1-121-126 ◽

2010 ◽

pp. 121-126

Author(s):

Tatyana F. Berestova ◽

Vera R. Abramovskih

Keyword(s):

Research Library ◽

Basic Principles ◽

History Of ◽

Publishing Infrastructure ◽

Distribution Sector ◽

The University

The basic principles of publishing activities in universities and their interrelation, all stages of redaction, the problems each of them, and ways to solve them. The activities of the distribution sector of publishing in the structure of the Research Library of Chelyabinsk State Academy of Culture and Arts and the history of its creation are described.

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