Prediction of the Toxic and Harmful Gas along the Sichuan-Tibet Railway

2011 ◽  
Vol 90-93 ◽  
pp. 2025-2032
Author(s):  
Pei Dong Su
Keyword(s):  
Fault Zones ◽  
Ultrabasic Rock ◽  
The Other ◽  
Metamorphic Rocks ◽  
Volcanic Zone ◽  
Geological Setting ◽  
Geological Conditions ◽  
Basement Fault ◽  
Metamorphic Zone ◽  
Poisonous Gas

The geological setting of Sichuan-Tibet Railway is complicated, while magmatic and metamorphic rocks are widely distributed. Reference to the other engineering experience of underground works under similar geological conditions at home and abroad, the analysis shows that it exists the hazardous possibility that the inorganic gas are toxic and harmful in the tunnels of Sichuan-Tibet Railway. Combining the conditions that inorganic gas produced and the geological conditions along the Sichuan-Tibet Railway, it analyzes and predicates that CH4, CO2, H2S, SO2, CO, NO2, NH3 and H2 are the main types of poisonous gas along the Sichuan-Tibet Railway. The poisonous gas is mainly distributed in the three suture zones, three crustal fault zones and more than three basement fault zones and mafic and ultrabasic rock zone, granites zone, volcanic zone and contact metamorphic zone. All these zones are the favorable migration point to area and gathering area to the toxic and harmful gas. It should be highly mentioned on the construction of the tunnels.

scholarly journals Rock Types Classification and Distribution on Anabanua Village, Barru Regency, South Sulawesi

2020 ◽  
Vol 8 (1) ◽  
pp. 1-8
Author(s):  
Muhammad Resky Ariansyah ◽  
Muhammad Fawzy Ismullah Massinai ◽  
Muhammad Altin Massinai
Keyword(s):  
Sedimentary Rocks ◽  
Research Area ◽  
Igneous Rocks ◽  
The Other ◽  
Metamorphic Rocks ◽  
Geological Process ◽  
Rock Types ◽  
South Sulawesi ◽  
Geological Conditions ◽  
Limestone Sand

Anabanua Village, Barru Regency is one of the areas in South Sulawesi that has quite unique geological conditions. This condition inseparably comes from the complicated geological process that took place during the formation of the island, Sulawesi. In Anabanua Village, there are many types of rocks such as sedimentary rocks, metamorphic rocks and igneous rocks. This paper aims to map and classify the types of rock by taking samples on different places in the research area. Then we observe the samples physical properties. The results showed, from taking 10 rock samples in different places, they have various characteristics. 8 of them were sedimentary rocks, they are Limestone Quartz, Limestone Sand, Shale, Sandstone, Coal, Limestone Bioturbation, Breccia, and Chert Stone. The other 2 samples were metamorphic rocks, they are Greenschist and Quartzite.

Long-term investigation of a deep-seated creeping landslide in crystalline rock. Part I. Geological and hydromechanical factors controlling the Campo Vallemaggia landslide

2007 ◽  
Vol 44 (10) ◽  
pp. 1157-1180 ◽  
Author(s):  
L. Bonzanigo ◽  
E. Eberhardt ◽  
S. Loew
Keyword(s):  
Complex Structure ◽  
Companion Paper ◽  
Crystalline Rock ◽  
Fault Zones ◽  
Swiss Alps ◽  
Mitigation Measures ◽  
Metamorphic Rocks ◽  
Artesian Water ◽  
Creep Deformations

Slope movements of the deep-seated Campo Vallemaggia landslide in the southern Swiss Alps have been reported for over 200 years. Surface and borehole investigations of the unstable mass reveal an up to 300 m deep complex structure incorporating 800 million cubic metres of disturbed metamorphic rocks divided into blocks along primary fault zones. An average slide velocity of approximately 5 cm/year can be calculated from various monitoring data recorded between 1892 and 1995. Block movements primarily involve mechanisms relating to multiple shear surfaces, but in cases where slide blocks are constrained by other blocks, creep deformations are observed. Borehole investigations revealed the presence of artesian water pressures, which when integrated with inclinometer and surface geodetic data, helped to provide key insights into the underlying instability mechanisms. This paper reports the findings of an extensive mapping, geophysical, and monitoring investigation carried out over a 20 year period. Results from the analysis are presented with respect to the hydromechanical factors controlling the unstable mass, the significance of which were instrumental in resolving conflicts with regards to the slope mitigation measures required to stabilize the slope. In Part II (see companion paper, this issue), the stabilization works performed at Campo Vallemaggia and their effectiveness are presented.

scholarly journals Safety of building constructed on hillside slope

2021 ◽  
Vol 23 (1) ◽  
pp. 126-139
Author(s):  
S. V. Yushchube ◽  
I. I. Podshivalov ◽  
A. S. Larionov
Keyword(s):  
Pile Foundation ◽  
Strain State ◽  
Three Dimensional ◽  
Soil Formation ◽  
The Other ◽  
Structural Safety ◽  
Construction Site ◽  
Geological Surveys ◽  
Geological Conditions ◽  
Supporting Structures

The paper focuses on the pile foundation and footing of the building constructed on a hillside slope and consisting of four three-dimensional blocks. The building is arranged such that to protect the first block constructed on the footslope from the negative technogenic influence of the latter via the embedment of three supporting blocks into the hillside slope. The first three-dimensional block is a three-storey brick building, while the other three are the spatial supporting structures made of insitu reinforced concrete. All the blocks locate at different position levels. The resulting embedded part of the structure matches the class KS-3 construction site safety. It is thus necessary to assess the structural safety of the building constructed in difficult engineering and geological conditions. The MicroFe software is used for finite element dimensional calculations of the pile foundation and footing strength, stability and oscillation after studying the engineering-geological surveys, the analysis of the soil formation, composition and physicalmechanical properties, the piling field. Also, the theoretical model is proposed for the footingfoundation–building system. The obtained results allow assessing the stress-strain state of the pile foundation and footing with the lateral support to the hillside slope of soil.

Facies de metamorphisme profond et de retromorphose au NW du cap Corse

1954 ◽  
Vol S6-IV (4-6) ◽  
pp. 203-208
Author(s):  
Jean Laporte
Keyword(s):  
The Other ◽  
Metamorphic Rocks ◽  
Northwestern Part

Abstract The metamorphic rocks outcropping around Ersa and Centuri in the northwestern part of Corse cape on Corsica, France, may possibly be the more highly metamorphosed equivalents (including retrograde products) of the other rocks forming the cape.

scholarly journals IV.—On the Formation of the “Rock-Basin” of Lough Corrib, County Galway

1866 ◽  
Vol 3 (29) ◽  
pp. 489-495 ◽  
Author(s):  
G. H. Kinahan
Keyword(s):  
Metamorphic Rock ◽  
The Other ◽  
Metamorphic Rocks ◽  
Northern Portion ◽  
Boulder Clay

Lough Corrib is a long irregular lake of various widths, but having a general bearing of about N.W. and S.E. Its N.W. portion is in a granite and metamorphic rock country, while the rest of it overlies Carboniferous rocks, principally limestone. The northern portion is deep, the southern shallow, and through the whole of it are scattered numerous islands which, in the former part, are generally composed of Boulder-clay, while those in the latter portion are nearly always rock. Its known natural outlets are two, one being over the barrier of metamorphic rocks at Galway (U on Map, Pl. XIX), and the other subterranean passage south of Castlegar (T on Map, Pl. XIX). On all sides of the lake are rocks extending under it, or, to use Professor Ramsay's term, it lies in a “Rock-basin.” What excavated this Rock-basin? I propose in this paper to consider.

MICRONUTRIENT STATUS OF SELECTED CACAO-GROWING SOILS IN SOUTHWESTERN NIGERIA: PROFILE DISTRIBUTION OF TOTAL AND AVAILABLE ZINC

1985 ◽  
Vol 65 (1) ◽  
pp. 21-24 ◽  
Author(s):  
V. O. CHUDE ◽  
G. O. OBIGBESAN ◽  
N. E. EGBE
Keyword(s):  
Strong Association ◽  
Clay Content ◽  
The Other ◽  
Metamorphic Rocks ◽  
Soil Profiles ◽  
Southwestern Nigeria ◽  
Micronutrient Status ◽  
Profile Distribution ◽  
Available Zinc ◽  
Extractable Zn

A study was conducted to determine the content and distribution of total 1.0 M NH4OAc-, 0.1 M HCl-, 1 M MgCl2-, and 0.005 M DTPA-extractable Zn in the genetic horizons of 16 soil profiles from major cacao-growing areas in Southwestern Nigeria. The content of total Zn for all the soils varied from 12 to 92 μg/g with soils derived from igneous and metamorphic rocks containing more than those of sedimentary origin. Most of the soils had the highest concentration of total Zn in the surface horizons. There was a strong association between total Zn and organic matter, total Zn and silt/clay content. The 1 M NH4OAc-, 0.1 M NCl-, 1 M MgCl2- and 0.005 M DTPA-extractable Zn in all the soils and horizons varied from 0.17 to 5.6, from 0.06 to 2.37, from 0.20 to 1.20 and from 0.022 to 1.14 μg Zn/g, respectively. The NH4OAc generally removed more Zn than the other three extractants. The amount of Zn extracted showed a general decrease with depth. A significant amount of MgCl2-extractable Zn appeared to be associated with silt content while soil pH influenced the quantity of Zn extracted by the NH4OAc method. Key words: Total Zn, NH4OAc-extractable N, HCl-extractable N, MgCl2-extractable N, DTPA-extractable Zn, soil profile

scholarly journals Geologi dan Identifikasi Cebakan Bijih di Daerah Batubesi, Belitung Timur

EKSPLORIUM ◽  
2017 ◽  
Vol 38 (1) ◽  
pp. 7
Author(s):  
Ngadenin Ngadenin ◽  
Frederikus Dian Indrastomo ◽  
Adhika Junara Karunianto ◽  
Ersina Rakhma
Keyword(s):  
Iron Ore ◽  
Southeast Asian ◽  
Ore Deposits ◽  
Geological Mapping ◽  
The Other ◽  
Geological Structures ◽  
Ore Deposit ◽  
Geological Setting ◽  
Iron Ore Deposits ◽  
Potential Area

ABSTRAKWilayah Batubesi di Belitung Timur berada di zona bagian timur dari granit jalur timah Asia Tenggara sehingga diduga merupakan daerah yang sangat potensial bagi terbentuknya cebakan bijih seperti besi dan timah bersama dengan monasit dan mineral asesoris lainnya. Penelitian ini bertujuan untuk mengetahui tataan geologi dan mengidentifikasi keterdapatan cebakan bijih dan mineral ikutan radioaktif  di daerah Batubesi. Metodologi dalam penelitian ini adalah pemetaan geologi, pengukuran kadar uranium dan thorium, analisis petrografi, mineragrafi, dan butir. Daerah penelitian tersusun atas satuan granit dan metabatupasir. Granit diidentifikasi sebagai granit biotit dan granit hornblenda. Struktur geologi yang berkembang adalah sesar sinistral berarah barat daya – timur laut dan sesar dekstral berarah tenggara – barat laut. Cebakan bijih yang terbentuk di  merupakan cebakan bijih besi primer tipe skarn iron tin polymetallic dengan magnetit sebagai mineral utama dan monasit serta zirkon sebagai mineral ikutan radioaktif . Mineral ikutan lainya adalah hematit, ilmenit, kasiterit, dan rutil. ABSTRACTThe Batubesi area in Belitung Timur is located in the eastern part of the Southeast Asian granites tin belt zone, so that it expected as a potential area for the occurence of ore deposit such as iron and cassiterite associate with monazite and other accessories minerals. The study aimed to understand the geological setting and to determine the occurrence of primary ore deposit and its radioactive accessories minerals. The methodologies in this research are geological mapping, uranium and thorium grade measurement, petrography, mineragraphy and grain counting analysis. The area composed by granite and metasandstone units. Types of granites are biotite and hornblende granites. The geological structures founded in this area are SW-NE sinistral and NW-SE dextral faults. Ore deposit in the area is primary iron ore deposits of skarn iron tin polymetallic type where magnetite is the main mineral while monazite and zircon are radioactive accessories minerals. The other accessories minerals are hematite, ilmenite, cassiterite, and rutile.

scholarly journals Development of a database for the analysis of the disposal system in the representative preliminary safety analysis

2021 ◽  
Vol 1 ◽  
pp. 39-40
Author(s):  
Eva-Maria Hoyer ◽  
Paulina Müller ◽  
Phillip Kreye ◽  
Christoph Behrens ◽  
Marc Wengler ◽  
...  
Keyword(s):  
Radioactive Waste ◽  
Site Selection ◽  
Selection Procedure ◽  
Crystalline Rock ◽  
Radioactive Waste Disposal ◽  
Future Evolution ◽  
Technical Parameters ◽  
Geological Setting ◽  
Geological Conditions ◽  
High Level

Abstract. The Federal Company for Radioactive Waste Disposal (BGE) is the German waste management organisation responsible for implementing the search for a site with the best possible safety for the disposal of high-level radioactive waste for at least 1 million years, following the amendments of the Repository Site Selection Act in 2017. The selection procedure is meant to be a participatory, transparent, learning and self-questioning process based on scientific expertise. It consists of three phases with an increasing level of detail. The first step of the first phase of the site selection procedure was completed in September 2020 and resulted in the identification of 90 subareas that give reason to expect favourable geological conditions for the safe disposal. The potentially suitable subareas cover approximately 54 % of Germany and are located in three different host rocks: rock salt (halite), claystone and crystalline rock. The second step of phase one is currently in progress and includes the so-called representative preliminary safety analyses that aim to assess the extent to which the safe containment of the radioactive waste can be expected. Representative preliminary safety analyses are one of the foundations for deciding whether an area will be considered for surface-based exploration in the next phase of the site selection procedure. Within the preliminary safety analyses, the behaviour of the disposal system is analysed in its entirety, across all operational phases of the repository and under consideration of possible future evolution of the disposal system with respect to the safe containment of the radioactive waste. The development of a database is described, which aims to systematically document and provide the framework needed for the analyses of the disposal systems in the subareas regarding the safe containment of the radionuclides over the assessment period of 1 million years. This database includes the vast amount of information about the different components of the disposal system. This includes also the geological setting, the technical conception of the repository and compilations of values for the physical, geoscientific, and technical parameters characterising the various barriers of the disposal system. Furthermore, a self-contained derivation of expected and deviating future evolution of the disposal system and its geological setting is included; following the so-called features, events and processes (FEP) strategy.

scholarly journals Bencana Kekeringan di Wilayah Taman Bumi Nasional Karangsambung-Karangbolong: Pengontrol, Dampak, dan Ketahanan

2021 ◽  
Vol 12 (1) ◽  
pp. 57
Author(s):  
Sugeng Purwo Saputro ◽  
Dwi Ratih Purwaningsih ◽  
Rahmi Mulyasari
Keyword(s):  
Local Governments ◽  
Secondary Data ◽  
Metamorphic Rocks ◽  
Field Observations ◽  
Danger Zone ◽  
Infiltration Rates ◽  
Geological Conditions ◽  
Groundwater Reserves ◽  
Groundwater Reserve

ABSTRAKKaranggayam dan Karangsambung di Kabupaten Kebumen termasuk ke dalam zona bahaya tinggi terdampak bencana kekeringan. Kedua daerah tersebut memiliki variasi batuan yang lengkap mulai dari batuan beku, batuan sedimen, hingga batuan metamorf, dan termasuk ke dalam wilayah Taman Bumi Nasional Karangsambung-Karangbolong. Prediksi dan penentuan area yang masih memiliki cadangan air tanah menjadi hal yang vital untuk segera dilakukan guna mengurangi dampak dari bencana tersebut, ditunjang dengan pengetahuan mengenai pengontrol utama dari parameter penyebab bencana kekeringan di daerah Karanggayam dan Karangsambung. Observasi lapangan dan analisis geospasial dipilih menjadi metode karena dinilai lebih efisien untuk penelitian ini, serta didukung dengan hasil analisis statistik dari data sekunder. Fisiognomi tanah, kondisi geologi, dan angka infiltrasi yang merupakan bagian dari delapan karakteristik geografi dan geomorfologi, dinilai menjadi pengontrol utama dari parameter penyebab bencana kekeringan yang terjadi di Karanggayam dan Karangsambung. Ketiga karakteristik tersebut berperan dalam mempersempit kemungkinan area cadangan air tanah menjadi hanya berada di sekitar lembah antiklin dan lereng sayap antiklin bagian selatan-tenggara (S-SE). Seluruh hasil penelitian ini dapat berfungsi untuk membantu pemerintah daerah dan pengelola taman bumi dalam membuat berbagai macam perencanaan dan kebijakan terkait Taman Bumi Nasional Karangsambung-Karangbolong.Kata kunci: bencana, cadangan air tanah, Kebumen, kekeringan, taman bumiABSTRACTKaranggayam and Karangsambung in Kebumen Regency included in the high danger zone affected by drought. Both areas have complete rock variations ranging from igneous, sedimentary, to metamorphic rocks, and are included in the Karangsambung-Karangbolong National Geopark. Prediction and determination of areas that still have groundwater reserves are vital to be carried out immediately to reduce the disaster’s impact, supported by the knowledge of the main controllers of drought-causing parameters in both areas. Field observations and geospatial analysis were chosen because they were considered more efficient and supported by the results of statistical analysis from secondary data. Soil physiognomy, geological conditions, and infiltration rates are considered the main controllers causing drought disasters in Karanggayam and Karangsambung areas. These three characteristics narrow down the possibility that the groundwater reserve area is only around the anticline valley and the south-southeast (S-SE) side of the anticline wing. All of the results of this study can help local governments and geopark management to make various plans and policies related to the Karangsambung-Karangbolong National Geopark.Keywords: disaster, groundwater reserves, Kebumen, drought, geopark

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