RELATIONSHIP OF ANTIMONY WITH GOLD MINERALIZATION IN THE ORE DISTRICTS OF EASTERN KAZAKHSTAN

2014 ◽  
Vol 55 (10) ◽  
Keyword(s):  
Gold Mineralization ◽  
Relationship Of ◽  
Eastern Kazakhstan

Relationship of antimony with gold mineralization in the ore districts of Eastern Kazakhstan

2014 ◽  
Vol 55 (10) ◽  
pp. 1170-1182 ◽  
Author(s):  
K.R. Kovalev ◽  
Yu.A. Kalinin ◽  
E.A. Naumov ◽  
M.K. Myagkaya
Keyword(s):  
Gold Mineralization ◽  
Relationship Of ◽  
Eastern Kazakhstan

Gold–copper–bismuth mineralization in hedenbergitic skarn, Tombstone Mountains, Yukon

1987 ◽  
Vol 24 (12) ◽  
pp. 2362-2372 ◽  
Author(s):  
Isobel J. Brown ◽  
Bruce E. Nesbitt
Keyword(s):  
Large Scale ◽  
Small Volume ◽  
Gold Mineralization ◽  
Rock Interaction ◽  
The North ◽  
Mineral Assemblages ◽  
Intrusive Rocks ◽  
Porosity And Permeability ◽  
Relationship Of ◽  
The Relationship

Gold mineralization on the Marn property, Yukon, occurs in two pyroxene skarn bodies, which are adjacent to the Mount Brenner Stock in the Ogilvie Mountains. The skarns are separated by a 600 m wide monzonite intrusion and show contrasting mineralogical and geochemical characteristics in addition to quite different metal values. Significant but uneconomic Au, Ag, W, and Cu mineralization is found in skarn on the north side of the intrusion, while very low Au grades (0.052 g/t) occur at the southern contact. The mineral assemblages of both skarns are dominated by iron-rich pyroxenes. The iron content of the pyroxenes varies between Hd40 and Hd80 in the northern location and Hd80 and Hd100 in the southern skarn. A well-developed sequence of retrograde alteration affected only the northern skarn. This was probably the result of porosity and permeability differences in the early, high-temperature pyroxene skarn, which permitted greater fluid–rock interaction in the northern skarn during cooling. A small volume of diopsidic, aluminous, wollastonite-bearing skarn occurs in both the northern and southern localities. The relationship of this type of skarn to the hedenbergitic skarn is ambiguous, since there is no large-scale mineralogical zoning. The Marn is similar to hedenbergitic, auriferous skarns of Japan, where the oxidation state of the intrusive rocks is believed to be the controlling factor in the development of skarn mineralogy.

Microscopic Studies of Gold Deposit of Southern Ashaly in Eastern Kazakhstan

2013 ◽  
Vol 828 ◽  
pp. 1-10
Author(s):  
Adilkhan Baibatsha ◽  
Kulyash Dyussembayeva ◽  
Aimkhan Kassenova
Keyword(s):  
Gold Mineralization ◽  
Sedimentary Rocks ◽  
Sulfide Deposit ◽  
Carbonaceous Shales ◽  
Microscopic Studies ◽  
Middle Carboniferous ◽  
Gold Sulfide ◽  
First Time ◽  
Tuff Breccia ◽  
Eastern Kazakhstan

The gold-sulfide deposit Southern Ashaly is localized in carbonaceous terrigenous formation (black shale strata) of the middle carboniferous (Bukon suite, which is the ore-hosting for super large deposit Bakyrchik). The Southern Ashaly is at the exploration stage and according to preliminary estimates of the expected resources belongs to a large deposit in scale. Ore gold mineralization of such level as Southern Ashaly in southwestern Kalba is found for the first time and gives hope for the discovery of such objects in the Boko Vassilyevskoye ore field. Ore-hosting at the field Southern Ashaly is carbonaceous terrigenous formation of the middle carboniferous, with no visible signs of volcanic formations. But, it was revealed, at microscopic research by us, paragenetic relation of the gold mineralization with small intrusions of plagiogranites and zones of plagiogranite porphyry dykes and found volcano-sedimentary rocks (aleuritic tuffsandstone, tuff breccia) which have undergone hydrothermal-metasomatic changes. The vein-disseminated gold-sulfide mineralization is associated with beresitizated plagiogranites and plagigranite-porphyries and hydrothermally altered tuff sandstones, tuff breccia and carbonaceous shales. Southern Ashaly unlike Bakyrchik deposit which contains invisible gold in sulfides, all the gold is concentrated in the pyrite mainly in the form of micro-sized (1-5 µm or less) in arsenopyrite is noted rarely.

scholarly journals Металлогения Камчатского срединного массива

2020 ◽  
pp. 39-54
Author(s):  
V. A. Stepanov ◽  
◽  
V. Ye. Kungurova ◽  
I. A. Koidan ◽  
◽  
...  
Keyword(s):  
Late Cretaceous ◽  
Igneous Rock ◽  
Gold Mineralization ◽  
The Third ◽  
Copper Nickel ◽  
Nickel Copper ◽  
Three Stages ◽  
Relationship Of ◽  
Gold Sulfide ◽  
The Relationship

The article describes the ore bearance of three stages of reflected activation of the Kamchatka middle massif: Late Cretaceous, Eocene, and Miocene. In the first stage, gold mineralization of the gold-quartz and gold-sulfide-quartz formations was formed; in the second - sulfide platinoid-copper-nickel; in the third - gold-copper-molybdenum-porphyry. The relationship of gold, sulfide platinoid-copper-nickel and gold-copper-molybdenum-porphyry mineralization with certain igneous rock complexes - (Kola, Dukuk and Lavkin) is shown. The mining of nickel, copper from the Shanuch deposit and gold from placers has been noted.

scholarly journals Akkalkan deposit of bentonite clays (Southeast Kazakhstan): formation conditions and prospects for technological use

2019 ◽  
Vol 61 (5) ◽  
pp. 84-95
Author(s):  
V. V. Nasedkin ◽  
N. M. Boeva ◽  
A. L. Vasiliev
Keyword(s):  
Raw Materials ◽  
Technological Properties ◽  
Lamellar Texture ◽  
Mineralogical Study ◽  
Formation Conditions ◽  
Black Plastic ◽  
Bentonite Clays ◽  
Relationship Of ◽  
The Relationship ◽  
Eastern Kazakhstan

The article presents the results of the bentonite clays study of Akkolkanskoye deposit, located in South-Eastern Kazakhstan. Based on the mapping, four main types of bentonites were identified: light gray argillite-like clay; dark gray clay lamellar and crushed stone morphology; waxy light brown and pale yellow clay lamellar texture; black plastic clay. Mineralogical study of these varieties allowed to establish the relationship of crystal-morphological features of the main rock-forming mineral in clays with the conditions of their formation and with the technological properties of bentonite raw materials for use in various industries.

scholarly journals Gold mineralization in the Neo-Tectonic Region of Honje Formation and Cipacar Formation

2018 ◽  
Vol 3 (4) ◽  
pp. 231 ◽  
Author(s):  
Dudi Nasrudin Usman ◽  
Nana Sulaksana ◽  
Febri Hirnawan ◽  
Iyan Haryanto
Keyword(s):  
Rock Mass ◽  
Gold Mineralization ◽  
Statistical Tests ◽  
Tectonic Activity ◽  
Sample Collection ◽  
Structure Mapping ◽  
Surface Mapping ◽  
Rock Structure ◽  
Relationship Of ◽  
Andesite Lava

The gold ore mineralization region is a zone of mineralization which is inseparable from the role of geological structures, one of which is fracture. The Cibaliung and surrounding areas are epithermal gold mineralization zones, in this region there are two main mineralized zones, namely Cibitung Zone and Cikoneng Zone. It has almost the same characteristics where the fractures formed are quite large so that it influences the class of rock mass, but the other side is the presence of many fractures which make it easier for scattered mineralization to fill the fracture so that the formed vein is thick enough. This study aims to analyze the relationship of Rock Mass Rating (RMR) and Rocks Quality Design (RQD) to tectonic movements in the region to prove the neo-tectonic phenomena in the Honje Formation and Cipacar Formation using surface mapping methods. The methods used are rock type mapping, rock structure mapping, mapping and RQD measurements, rock descriptions and rock sample collection. All the data obtained are then verified and validated before processing and statistical tests. Statistical tests are carried out to ensure an analysis with a basis that is recognized by all parties. Both formations above have different ages, which is for the Honje Formation (Andesite Lava) with the final Miocene age and Cipacar Formation (tuff) at the age of Pleistocene. The findings of this study are the two formations measured by RQD and RMR on rock cracks and surrounding conditions; the RMR observation station made around 125 points in the Honje Formation and 117 points in the Cipacar Formation. The R2 value of the RMR value of the Honje Formation and the Cipacar Formation shows a positive relationship of 67%; The biggest RMR value is in Tuff rock. In addition, the relation between RMR Andesite Lava Value and RMR Tuff Value is done with T-Test between Andesite Lava and Tuff where the result shows no difference of mean between RMR Andesite Lava and RMR Tuff Value. Therefore, the tectonic processes that occur in the Honor Andesite Lava Unit of Honje Formation with the preceding position are formed, and the older age at the end of the Miocene age that is blocked by the field of unconformity experienced Continuity on Cipacar Formation Tuff Unit with the upper position that is formed after Honje Formation and younger age in Pleistocene. The continuation of the tectonic process proves the existence of active tectonic activity better known as Neo-tectonic.

Manganiferous garnet underlying the Bousquet gold orebody, Quebec: metamorphosed manganese sediment as a guide to gold ore

1982 ◽  
Vol 19 (5) ◽  
pp. 993-1010 ◽  
Author(s):  
R. I. Valliant ◽  
R. L. Barnett
Keyword(s):  
Hydrothermal Vent ◽  
Gold Mineralization ◽  
Spatial Relationship ◽  
Manganese Nodules ◽  
Sea Floor ◽  
Gold Ore ◽  
Abitibi Greenstone Belt ◽  
Relationship Of ◽  
East West ◽  
Similar Enrichment

Garnet–quartz–muscovite rock stratigraphically underlies a volcanogenic pyritic gold orebody within Bousquet Township, Abitibi greenstone belt, Quebec. Garnet constitutes only 3% of the rock within muscovite-rich layers near its east and west ends whereas the rock contains 12% of garnet near its center. Trails of quartz, carbonate, and sulphide inclusions and parallel bands of an ultrafine black opaque mineral produce a layered appearance in the garnet. Garnet consists of 25% MnO and is zoned with maximum MnO content at its center. Furthermore, MnO content is greatest in garnet near the center and stratigraphic top of the rock and decreases systematically to the east, west, and stratigraphic base. Pb, Zn, and Ba exhibit similar enrichment trends from stratigraphic base to top of the rock; however Ba remains abundant in the overlying orebody.The interpretation is that the garnet rock was a primary Mn-rich sediment that accumulated near a sea-floor hydrothermal vent. By analogy with modern hydrothermal Mn deposits, the garnets are believed to be metamorphosed equivalents of Archean manganese nodules. The spatial relationship of the garnet rock to gold ore, the increase in MnO/FeO in garnet toward ore, and the large areal extent of the rock indicate its usefulness in exploration for gold mineralization.

The relationship of the scleractinian corals to the rugose corals

Paleobiology ◽  
1980 ◽  
Vol 6 (02) ◽  
pp. 146-160 ◽  
Author(s):  
William A. Oliver
Keyword(s):  
Critical Points ◽  
Scleractinian Corals ◽  
Convincing Evidence ◽  
Early Triassic ◽  
Rugose Corals ◽  
History Of ◽  
The Subject ◽  
Relationship Of ◽  
The Relationship ◽  
Biologic Factors

The Mesozoic-Cenozoic coral Order Scleractinia has been suggested to have originated or evolved (1) by direct descent from the Paleozoic Order Rugosa or (2) by the development of a skeleton in members of one of the anemone groups that probably have existed throughout Phanerozoic time. In spite of much work on the subject, advocates of the direct descent hypothesis have failed to find convincing evidence of this relationship. Critical points are:(1) Rugosan septal insertion is serial; Scleractinian insertion is cyclic; no intermediate stages have been demonstrated. Apparent intermediates are Scleractinia having bilateral cyclic insertion or teratological Rugosa.(2) There is convincing evidence that the skeletons of many Rugosa were calcitic and none are known to be or to have been aragonitic. In contrast, the skeletons of all living Scleractinia are aragonitic and there is evidence that fossil Scleractinia were aragonitic also. The mineralogic difference is almost certainly due to intrinsic biologic factors.(3) No early Triassic corals of either group are known. This fact is not compelling (by itself) but is important in connection with points 1 and 2, because, given direct descent, both changes took place during this only stage in the history of the two groups in which there are no known corals.

Skeletal elements of crinoid echinoderms: High-resolution structural and microanalytical results

1983 ◽  
Vol 41 ◽  
pp. 194-195
Author(s):  
D. F. Blake ◽  
L. F. Allard ◽  
D. R. Peacor
Keyword(s):  
High Resolution ◽  
Marine Invertebrates ◽  
Sea Urchins ◽  
Structural Features ◽  
Sea Stars ◽  
High Resolution Tem ◽  
Relationship Of ◽  
The Relationship ◽  
Insight Into

Echinodermata is a phylum of marine invertebrates which has been extant since Cambrian time (c.a. 500 m.y. before the present). Modern examples of echinoderms include sea urchins, sea stars, and sea lilies (crinoids). The endoskeletons of echinoderms are composed of plates or ossicles (Fig. 1) which are with few exceptions, porous, single crystals of high-magnesian calcite. Despite their single crystal nature, fracture surfaces do not exhibit the near-perfect {10.4} cleavage characteristic of inorganic calcite. This paradoxical mix of biogenic and inorganic features has prompted much recent work on echinoderm skeletal crystallography. Furthermore, fossil echinoderm hard parts comprise a volumetrically significant portion of some marine limestones sequences. The ultrastructural and microchemical characterization of modern skeletal material should lend insight into: 1). The nature of the biogenic processes involved, for example, the relationship of Mg heterogeneity to morphological and structural features in modern echinoderm material, and 2). The nature of the diagenetic changes undergone by their ancient, fossilized counterparts. In this study, high resolution TEM (HRTEM), high voltage TEM (HVTEM), and STEM microanalysis are used to characterize tha ultrastructural and microchemical composition of skeletal elements of the modern crinoid Neocrinus blakei.

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