The appearance of copper-bearing mineralization in the region of Muang Xay, Laos

2018 ◽  
Vol 472 (472) ◽  
pp. 303-310
Author(s):  
Karol Zglinicki ◽  
Krzysztof Szamałek ◽  
Krzysztof Szamałek ◽  
Michał Pilaszkiewicz
Keyword(s):  
Mineralogical Composition ◽  
High Potential ◽  
Igneous Rocks ◽  
Abandoned Mine ◽  
Indochina Peninsula ◽  
Rock Samples ◽  
Field Reconnaissance ◽  
Indosinian Orogeny ◽  
Crust Deformation ◽  
Geological Research

Geotectonic events in the Indochina Peninsula, associatted with the Indosinian orogeny between the Paleozoic and Mesozoic, has created many fold structures and fault areas oin the territory of Laos. Magmatic processes and Earth’s crust deformation enabled arising of rich Cu mineralization. A prospective area for the occurrence of Cu, Ag and Au minerals is the folded region on Muang Xay, northern Laos. The main purpose of geological research of the Muang Xay area was the recognition of chemical and mineralogical composition of rock samples and the evaluation of the area of potential geological resources. During field reconnaissance in 2018, the rock samples were taken from an abandoned mine. It was concluded that primary rocks suffered intense Na-metasomatic processes, preserving primary copper sulphides – bornite, chalcocite and covellite. The content of Cu is up to 49.64% and Ag up to 119.5 ppm. As a result of metasomatism of igneous rocks, diorite or andesite types – albitite was formed. Albitite is composed of medium-grained albite, Mg-chlorite and Cu-carbonates. The prospective research shows that the Muang Xay region has a high potential of metalliferous deposits.

scholarly journals Uran, thorium a draslík v krystaliniku a paleozoických sedimentech na mapovém listu 14-33 Polička – laboratorní gamaspektrometrie a parciální chemické složení variských plutonitů

2017 ◽  
Vol 24 (1-2) ◽  
Author(s):  
Jiří Zimák
Keyword(s):  
Natural Radioactivity ◽  
Gamma Ray ◽  
Igneous Rocks ◽  
Crystalline Complex ◽  
Rock Samples ◽  
Gamma Ray Spectrometer ◽  
Variscan Granitoids ◽  
Mass Activity ◽  
Geological Units

The paper deals with natural radioactivity of metamorphic and igneous rocks and Palaeozoic sediments within the map sheet 14-33 Polička. Studied rocks belong to three geological units: the Hlinsko Zone (phyllites and quartzites of the Mrákotín Fm., flysch sediments of the Hlinsko-Rychmburk Fm.), the Svratka Crystalline Complex (mainly mica schists, paragneisses, orthogneisses and migmatites, also amphibolites, skarns, erlans and quartzites) and the Polička Crystalline Complex (mica schists, paragneisses to migmatites and the Variscan granitoids are dominant). Concentrations of potassium, uranium and thorium were measured using a laboratory gamma-ray spectrometer in 805 rock samples. Data are tabled and discussed. Natural radioactivity of rocks is evaluated on the basis of the calculated values of mass activity of 226Ra equivalent (am). Slightly increased am values were found in migmatites and orthogneisses of the Svratka Crystalline Complex (187 Bq.kg-1 on average), granites and granodiorites of the Budislav Pluton (216 Bq.kg-1), granodiorites and rocks of a tonalite suite of the Miřetín Pluton (199 and 194 Bq.kg-1). Increased concentrations of uranium and thorium were found in some samples of pegmatite and aplite. Radioactivity of rocks of the Hlinsko-Rychmburk and Mrákotín Fms. can be assessed as relatively low.

Particle size and mineralogical composition of inorganic colloids in waters draining the adit of an abandoned mine, Goesdorf, Luxembourg

2009 ◽  
Vol 24 (1) ◽  
pp. 52-61 ◽  
Author(s):  
Montserrat Filella ◽  
Vincent Chanudet ◽  
Simon Philippo ◽  
François Quentel
Keyword(s):  
Particle Size ◽  
Mineralogical Composition ◽  
Abandoned Mine

scholarly journals Meteorit Potůčky (Steinbach): historie a nové nálezy (Česká republika)

2020 ◽  
Vol 28 (1) ◽  
pp. 179-202
Author(s):  
Petr Pauliš ◽  
David Černý ◽  
Tomáš Malý ◽  
Zdeněk Dolníček ◽  
Martin Bohatý ◽  
...  
Keyword(s):  
Binary Mixtures ◽  
Mineralogical Composition ◽  
Total Weight ◽  
Published Data ◽  
Iron Meteorites ◽  
Chemical Similarity ◽  
Rock Samples ◽  
Subsequent Research ◽  
Literary Sources

In the years 2017 and 2019 two silicate-rich iron meteorites (IVA-an) with a total weight of over 7 kg were found during the collection of rock samples near the old mining locality Glücksburg near Potůčky in the Krušné hory/Erzgebirge Mountains. Subsequent research confirmed their structural, mineralogical and chemical similarity with the meteorites of the historical find called Steinbach. Due to the complicated circumstances of the finding of these meteorites (in addition to already recognized finds of Steinbach itself at Grimma, Rittersgrün in Saxony and Potůčky/Breitenbach in Bohemia), historical literary sources have been reviewed. In the study of mineralogical composition of both newly found meteorites, previously known and published data were confirmed, in several cases their data were refined (chromite, schreibersite and nickelphosphide). In addition, the presence of troilite-hosted veinlets of Fe-Ni sulfides mostly corresponding to Ni-rich binary mixtures troilite-godlevskite and troilite-heazlewoodite, and a supergene phosphate close to beraunite were found. In the final chapter, there a hypothetical area, in which the potential occurrence of additional pieces of meteorites of the Steinbach historical fall can be expected is delineated. Based on the concentration of 40K radionuclide in the meteorite found, its radiation age can be estimated at 70 ± 30 million years.

scholarly journals Pétrographie characterization of rocks from the Mirabello bay region, Crete, and its application to Minoan archaeology: the provenance of stone implements from Minoan sites

2007 ◽  
Vol 40 (4) ◽  
pp. 1768 ◽  
Author(s):  
H. M. Dierckx ◽  
B. Tsikouras
Keyword(s):  
Raw Materials ◽  
Igneous Rocks ◽  
Metamorphic Rocks ◽  
Rock Samples ◽  
Rock Types ◽  
Source Regions ◽  
Time Period

The Minoans of East Crete used a variety of igneous and metamorphic rocks as stone implements. These were probably procured in dry riverbeds and beaches located in a region along the Bay of Mirabello or from an onlap conglomerate, which geologically dominates that region and contains rock types of igneous, metamorphic and sedimentary origin. Several rock samples were collected for pétrographie investigation to examine and confirm the source for the igneous rocks. Detailed pétrographie description of natural samples provides the identification of the rocks employed by Minoans and confirms the source of their origin. Apparently the Minoans were able to evaluate the hardness of the stones procured according to the desirable usage and their expected fatigue, thus avoiding unnecessary timeconsuming treatment. The identification of the variable lithotypes used for these implements and the verification of their source regions reveal the time it took to procure the raw materials as well as the time period during which the rocks were employed.

Zircon U–Pb ages of Permian–Triassic igneous rocks in the Song Hien structure, NE Vietnam: The Emeishan mantle plume or the Indosinian orogeny?

2022 ◽  
Vol 224 ◽  
pp. 105033
Author(s):  
Tatyana V. Svetlitskaya ◽  
Thi Huong Ngo ◽  
Peter A. Nevolko ◽  
Tuan Anh Tran ◽  
Andrey E. Izokh ◽  
...  
Keyword(s):  
Mantle Plume ◽  
Igneous Rocks ◽  
Indosinian Orogeny ◽  
Emeishan Mantle Plume

Application of Outcrops Rock Samples in Laboratory Research of Shale Drilling Fluid Interaction

2017 ◽  
Author(s):  
Borivoje Pašić ◽  
Nediljka Gaurina-Međimurec ◽  
Petar Mijić ◽  
Uroš Barudžija
Keyword(s):  
Drilling Fluid ◽  
Chemical Properties ◽  
Mineralogical Composition ◽  
Laboratory Research ◽  
Main Task ◽  
Laboratory Equipment ◽  
Rock Samples ◽  
Original Rock ◽  
Hot Rolled ◽  
Fluid Interaction

Shales instability is a result of its mineralogical composition (especially content of different water sensitive clay) and its physico-chemical properties. In different laboratory research of shale/drilling fluid interaction conducted until now, researcher used different shale samples (original rock samples taken by the coring process, drilling cuttings, outcrop samples and artificial rock samples), different laboratory equipment and various inhibitive muds. There are two main problems related to the laboratory testing of shale samples’ quantity and quality. The main task of this paper was to examine the applicability of outcrop rock (shale) samples for laboratory research of shale/drilling fluid interaction. Rock samples were taken at natural shale outcrop on different locations in Croatia. In the first stage of the laboratory research, mineralogical composition and petrophysical properties of used shale samples were tested. In the second stage, shale samples’ swelling in different fluid were examined. After getting results of the shale swelling, new quantity of outcrop shale samples was taken, crushed to drilling cuttings size and placed in roller oven cells previous charged with different fluids. In the last stage, a dried (hot rolled) shale sample was used for preparation of the artificial shale samples. Generated artificial samples were used in further laboratory research.

Soil studies in relation to geology in an area in north-east Scotland. Part II. The soils and their development

1942 ◽  
Vol 32 (4) ◽  
pp. 373-388
Author(s):  
R. Hart
Keyword(s):  
Sedimentary Rocks ◽  
Mineralogical Composition ◽  
Igneous Rocks ◽  
Metamorphic Rocks ◽  
Similar Material ◽  
Parent Materials ◽  
Red Sandstone ◽  
The Third ◽  
North East ◽  
Boulder Clay

Discussion and SummaryThere are many areas throughout Britain where soil parent materials cannot be differentiated on the basis of solid geology alone, and difficulties are frequently experienced in classifying and mapping the soils. The object of this investigation was to study the parent materials and soils in a complex area of this kind.The area selected is in north-east Scotland, and about half of it is covered by acid igneous and metamorphic rocks and the rest by sedimentary rocks of Old Red Sandstone age. The geology is complicated by three glaciations giving rise to diverse soil parent materials.Five main groups of parent materials have been recognized, based on origin, texture and mineralogical composition. The first group consists of drift derived from acid igneous rocks and schists; the second of boulder clay from similar material plus an admixture of sedimentary rocks; the third of fluvioglacial deposits of varied textures; the fourth of conglomerate or thin drift from Old Red Sandstone rocks; and the fifth of boulder clay derived from Old Red Sandstone rocks where the influence of marls and shales in the drift is strong. Groups 1 and 5 are of major importance in this region and also elsewhere because of their widespread distribution. The others are more local.

scholarly journals Electrical behaviour of rock samples from Puglia 1 borehole (South Italy): from 20°C to 1000°C

1997 ◽  
Vol 40 (6) ◽  
Author(s):  
M. Muschietti
Keyword(s):  
Harmonic Distortion ◽  
Mineralogical Composition ◽  
Laboratory Research ◽  
Electrical Measurements ◽  
Rock Samples ◽  
Low Resistivity ◽  
South Italy ◽  
Internal Fluid ◽  
Deep Rock ◽  
Internal Pore

During 1992, at the Applied Geophysics Laboratories of Florence (I) and Prague (CS) some electrical measurements were made on deep rock samples to understand the source of low resistivity values measured by logs.The studied samples were sandstones (6380 m depth) and dolomites (6070 m depth) coming from the borehole AGIP-PUGLIA 1 (South Italy). The electrical parameters were the real part of the complex resistivity, the loss tangent and the total harmonic distortion. They were measured as functions of temperature (20 £ T £ 1000°C),confining and internal pore pressure (3 £ p £ 33 MPA), and frequency (0.002 £ f£ 1000 Hz). For the measurements, two different apparatus were used: the Florence apparatus working up to T= 200°C conditioning internal pore fluid, and the Prague apparatus working in temperature (200°÷1000°C). Both the literature and laboratory research confirm that the electrical results at our experimental physical conditions remain unchanged. The obtained results confirmed that deep rocks can show low resistivity valued at special internal fluid pressures and temperatures, according to their mineralogical composition and petrographic structure.

scholarly journals ASSESMENT OF THE QUALITY OF METAMORPHIC AND IGNEOUS ROCKS FROM TERPNI (SERRES, NORTH GREECE) FOR THEIR USE AS RAW MATERIALS IN THE PRODUCTION OF STONEWOOL

2017 ◽  
Vol 50 (4) ◽  
pp. 1913
Author(s):  
P. Lampropoulou ◽  
D. Papoulis ◽  
E. Metaxa ◽  
B. Tsikouras ◽  
K. Hatzipanagioutou ◽  
...  
Keyword(s):  
Raw Materials ◽  
Mineralogical Composition ◽  
Igneous Rocks ◽  
Raw Material ◽  
Metamorphic Rocks ◽  
Lower Content ◽  
Wool Production ◽  
Stone Wool ◽  
Frequent Presence

Metamorphic and igneous rocks of Terpnis' Serres in N. Greece have been studied. Nowadays these metamorphic rocks are used as raw materials in stone wool production, by Fibran industry, whilst the studied plutonic samples with lower content of iron oxide are proposed as alternative raw material for the production of new lightly colored stone wool, according to the market demands. Selected epidote amphibolites and quartz diorite samples were analyzed by ICP ΟES, AAS, XRD, Petrographic microscopy, and SEM. The epidote-amphibolites show some evidence of weathering leading to sericiticsaussuritizated plagioclase crystals and secondary smectite and chlorite nanocrystals. Phyllosilicates affect positively the grinding procedure and melting of the raw materials under industrial conditions of stone wool production, due to its lower hardness and melting point compared to that of the primary hornblende. The chemical and major mineralogical composition, the heterogeneous characteristics of textures as well as the frequent presence of phyllosilicates, due to the weathering of the plutonic studied samples, are expected to contribute to the easier grinding and melting of rocks under industrial conditions as well as to the production of a new light colored and competitive stone wool product

scholarly journals VNITŘNÍ ZONÁLNOST TĚLES HORNIN TĚŠÍNITOVÉ ASOCIACE VE SLEZSKÉ JEDNOTCE: KORELACE PETROGRAFICKÝCH A PETROFYZIKÁLNÍCH PARAMETRŮ

2014 ◽  
Vol 21 (1-2) ◽  
Author(s):  
Kristýna Schuchová ◽  
Zdeněk Dolníček
Keyword(s):  
Magnetic Susceptibility ◽  
Igneous Rocks ◽  
Western Carpathians ◽  
Published Data ◽  
Modal Composition ◽  
Petrophysical Parameters ◽  
Rock Samples ◽  
Outer Western Carpathians ◽  
Petrographic Study

This article is focused on petrography of igneous rocks of the teschenite association and its correlation with selected petrophysical parameters. These igneous rocks were studied at three localities in the Silesian unit (Outer Western Carpathians) – Hodslavice, Žilina near Nový Jičín and Tichá. We conducted petrographic study (including modal composition based on planimetry) and then we compared results with previously published data on magnetic susceptibility and density of the same rock samples. The primary magmatic phases (clinopyroxenes, amphibole, biotite, opaque phases, feldspars and analcime) show in all cases less or more signs of post-magmatic alteration, giving rise mainly to secondary chlorite, carbonate and “limonite”. The amount of chlorite ranges from 21 to 23, 3 to 9, and 16 to 35 mod. % and those of carbonate vary from 5 to 15, 3 to 4, and 16 to 24 mod. % in Hodslavice, Žilina near Nový Jičín, and Tichá, respectively. The values of magnetic susceptibility range from 5.56 × 10-8 to 7.66 × 10-5, 5.07 × 10-7 to 1.61 × 10-5, and 2.46 × 10-7 to 2.93 × 10-5 SI and those of density are between 2.50 and 2.77, 2.66 to 3.88, and 2.65 to 2.86 g/cm3 in Hodslavice, Žilina near Nový Jičín, and Tichá, respectively. Correlation of petrographic and petrophysical parameters suggests that various postmagmatic alterations (including chloritization, carbonatization and weathering associated with formation of limonite) can influence the values of magnetic susceptibility and density. The intensity of these alterations varies significantly among samples and sites.

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