Fluid Inclusion Study of Epithermal Quartz Veins from the Kyaukmyet Prospect, Monywa Copper-Gold Ore Field, Central Myanmar

The Kyaukmyet prospect is located near the main ore bodies of the Kyisintaung and Sabetaung high-sulfidation Cu-Au deposits, Monywa copper-gold ore field, central Myanmar. Lithologic units in the research area are of mainly rhyolite lava, lapilli tuff and silicified sandstone, mudstone and siltstone units of Magyigon Formation which hosted to be polymetallic mineralization. Our field study recorded that epithermal quartz veins are hosted largely in rhyolite lava and lapilli tuff units. Those quartz veins show crustiform, banded (colloform), lattice bladed texture and comb quartz. The main objectives of the present research in which fluid inclusion studies were considered to conduct the nature, characteristics and hydrothermal fluids evolution from the epithermal quartz veins. In this research, there are three main types of fluid inclusions are classified according to their phase relationship (1) two-phase liquid-rich inclusions, (2) the coexisting liquid-rich and vapor-rich inclusions, and (3) only vapor-rich inclusions. Microthermometric measurements of fluid inclusions yielded homogenization temperatures (Th) of 148–282 °C and final ice-melting temperature (Tm) of -0.2°C to -1.4°C . The value of (Tm) are equal to the salinities reaching up 0.35 to 2.07 wt % NaCl equiv. respectively. Estimation formation temperature of the quartz veins provide 190°C and 210°C and paleo-depth of formation are estimated to be between 130m and 210m. Petrography of fluid inclusion and microthermometric data suggest that fluid boiling as well as mixing processes were likely to be happened during the hydrothermal fluid evolution at the Kyaukmyet prospect. According to the characteristics of many parameters including petrography of fluid inclusion, microthermometric data, paleo-depth, evidence of quartz vein textures and types of hydrothermal alteration from the Kyaukmyet prospect allows to interpret these data to be the low-sulfidation epithermal system.

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Ore Forming Fluid of Epithermal Quartz Veins at Cisuru Prospect, Papandayan District, West Java, Indonesia

Journal of Geoscience Engineering Environment and Technology ◽

10.25299/jgeet.2019.4.3.2279 ◽

2019 ◽

Vol 4 (3) ◽

pp. 170

Author(s):

Kha Yay Oo ◽

Wayan Warmada ◽

Anastasia Dewi Titisari ◽

Koichiro Watanabe

Keyword(s):

Fluid Inclusion ◽

Melting Temperature ◽

Fluid Inclusions ◽

Measurement Data ◽

Homogenization Temperature ◽

Salinity Range ◽

Ice Melting ◽

West Java ◽

Quartz Veins ◽

Lapilli Tuff

The Cisuru area is located in Talegong Sub-district, Garut Regency, West Java, Indonesia which is belongs to the central part of Southern Mountain Slope. The aim of this research is to understand the nature and characteristic of fluid inclusion from quartz veins (especially drill core samples) in the study area. Rock units in the area are characterized by Tertiary volcanic rocks and volcaniclastic sequence which is mainly composed of andesite, andesitic breccia, volcanic breccia, lapilli tuff, dacite and related to the intrusion of diorite. The Cisuru epithermal mineralization is dominantly hosted by andesite, dacite, breccia and lapilli tuff, and would probably be controlled by both permeable rocks and NS and NE-SW trending strike-slip faults. The mineralization is shown as void filling and replacement within the silica zone, veinlets along with the open space/fractures and dissemination. Fluid inclusion from quartz veins was studied to know nature, characteristics and origin of hydrothermal fluids. Microthermometric measurements of fluid inclusions were realized by using a Linkam THMSG 600 combined freezing and heating stages. Homogenization temperature and final ice melting temperature were measured for primary two-phase inclusion from quartz veins. Base on the study of the fluid inclusion, the value of homogenization temperature (Th) range from 200 ºC to 395 °C and ice melting temperature range from -0.1 to - 4.5 where salinity range from 0.2 to 7.2 wt. % NaCl equivalent. Fluid inclusion petrography and microthermometric measurement data exhibit that fluid mixing, dilution and boiling were main processes during the hydrothermal evolution. The formation temperature of each quartz vein is 260 ºC to 290 ºC and also their formation depth is estimated between 560m to 925m respectively. Combination of fluid inclusions petrography, microthermometric measurement, and estimate paleo depth from Cisuru area were suggested under the epithermal environment.

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Fluid inclusion study of quartz veins from the orogenic Klecza gold deposit in the Kaczawa Mountains (SW Poland)

Mineral Deposit Research: Meeting the Global Challenge ◽

10.1007/3-540-27946-6_142 ◽

2005 ◽

pp. 553-556

Author(s):

S. Z. Mikulski ◽

S. Speczik ◽

A. Kozlowski

Keyword(s):

Fluid Inclusion ◽

Gold Deposit ◽

Fluid Inclusion Study ◽

Quartz Veins ◽

Inclusion Study ◽

Sw Poland

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Fluid Inclusion Study and Opaque Mineral Assemblage at the Deep and Shallow Part of the Batu Hijau Porphyry Copper-gold Deposit, Sumbawa, Indonesia

Resource Geology ◽

10.1111/j.1751-3928.2009.00093.x ◽

2009 ◽

Vol 59 (3) ◽

pp. 231-243 ◽

Cited By ~ 6

Author(s):

Akira Imai ◽

Yuki Nagai

Keyword(s):

Fluid Inclusion ◽

Gold Deposit ◽

Mineral Assemblage ◽

Porphyry Copper ◽

Fluid Inclusion Study ◽

Opaque Mineral ◽

Copper Gold ◽

Inclusion Study ◽

Shallow Part

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Chronology and orientation of N2–CH4, CO2-H2O, and H2O-rich fluid-inclusion trails in intrametamorphic quartz veins from the Cuiabá gold district, Brazil

Mineralogical Magazine ◽

10.1180/minmag.1990.054.375.10 ◽

1990 ◽

Vol 54 (375) ◽

pp. 245-255 ◽

Cited By ~ 11

Author(s):

C. J. S. de Alvarenga ◽

M. Cathelineau ◽

J. Dubessy

Keyword(s):

Fluid Inclusion ◽

Fluid Inclusions ◽

Low Grade ◽

Fluid Circulation ◽

Raman Spectrometry ◽

Mato Grosso ◽

Spectrometry Analysis ◽

Quartz Veins ◽

Three Generations ◽

Inclusion Trails

AbstractThe upper Proterozoic Cuiabá group of Mato Grosso, Brazil, is composed of low-grade clastic meta-sediments which have been folded by several successive tectonic events. Three generations of quartz veins are associated with the structural evolution of this area. The first veins are deformed by the main tectonic phases and show a complex deformational patterns. The second set is parallel to the cleavage and was formed syntectonically during the main folding phase, whilst the last quartz veins are related to a later stage of deformation. A systematic study of fluid inclusions in relation with a statistical study of microstructural markers (fluid inclusion trails, opened microcracks) was carried out on quartz veins from three localities. On the basis of microthermometric studies and Raman spectrometry analysis, four differents types of fluids have been distinguished, each trapped in specific fluid inclusion trails: (i) CO2-rich liquids and vapours (Lc, Vc) at Casa de Pedra, (ii) Lc and Vc inclusions with variable amounts of CO2, CH4, N2 in the vapour phase at BR-70, (iii) CH2-N2-rich vapours (Vn-m), and (iv) aqueous inclusions (L) with variable salinities representing the last fluid generations at all localities.At Casa de Pedra and BR-70, most fluids are observed within the three generations of quartz veins, indicating an important fluid circulation associated with the last phase of brittle deformation. Fluid inclusions of type (iii) and (iv) are oriented along several well defined directions. The study shows the importance of integrated microstructural and fluid-inclusion studies for understanding the geometry and chronology of fluid circulation.

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Geochemical Data and Fluid Inclusion Study of the Middle Miocene Halite from Deep Borehole Huwniki-1, Situated in the Inner Zone of the Carpathian Foredeep in Poland

Minerals ◽

10.3390/min10121113 ◽

2020 ◽

Vol 10 (12) ◽

pp. 1113

Author(s):

Krzysztof Bukowski ◽

Anatoliy Galamay ◽

Piotr Krzywiec ◽

Andrzej Maksym

Keyword(s):

Fluid Inclusion ◽

Fluid Inclusions ◽

Fluid Inclusion Study ◽

Geochemical Data ◽

Sulfate Ions ◽

Deep Well ◽

Evolutionary Changes ◽

Orogenic Wedge ◽

Inclusion Study ◽

Salinity Water

The geochemical data and the study of fluid inclusions in primary halite are invaluable sources of saline basin information. Most of the previous analyses of salt from the Carpathian area have been obtained by studying the halite samples collected from depths not exceeding 1000 m (i.e., from salt mine outcrops or boreholes). In this article, for the first time, we present the results of samples obtained from a deep well where salt occurs below the frontal orogenic wedge at a depth of ~5000 m. The salt core’s petrological studies showed, quite unexpectedly, the presence of the chevron relics, typical for primary halite. Their geochemical data and fluid inclusion study can be used to reconstruct the environment of the salt sedimentation. The bromine, strontium, and rubidium content values indicated that primary brines were of marine origin, and salts may have undergone partial dissolution and redeposition under lower salinity water inflows. The main ions’ (K, Mg, SO4) ratios in the fluid inclusions were typical for those of the Badenian brines collected from the Carpathian Foredeep’s eastern part. Compared with modern seawater’s chemical composition, this brine contained a slightly lower content of sulfate ions. This was associated with evolutionary changes occurring in the contents of sulfate ions during the Cenozoic.

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Characteristics and applications of fluid inclusions in the Eogene system of the Biyang Depression—I. a fluid inclusion study

Chinese Journal of Geochemistry ◽

10.1007/bf02869068 ◽

1992 ◽

Vol 11 (4) ◽

pp. 370-383 ◽

Cited By ~ 3

Author(s):

Bixian Mai ◽

Benshan Wang

Keyword(s):

Fluid Inclusion ◽

Fluid Inclusions ◽

Fluid Inclusion Study ◽

Inclusion Study ◽

Biyang Depression

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Emeralds from the Delbegetey deposit (Kazakhstan): mineralogical characteristics and fluid-inclusion study

Mineralogical Magazine ◽

10.1180/0026461067020321 ◽

2006 ◽

Vol 70 (2) ◽

pp. 159-173 ◽

Cited By ~ 8

Author(s):

E.V. Gavrilenko ◽

B. Calvo Pérez ◽

R. Castroviejo Bolibar ◽

D. García del Amo

Keyword(s):

Fluid Inclusion ◽

Fluid Inclusions ◽

Isotope Composition ◽

Aqueous Fluid ◽

Fluid Inclusion Study ◽

Refractive Indices ◽

Mineralogical Characteristics ◽

Primary Fluid ◽

Inclusion Study ◽

Characteristic Features

AbstractThe aim of this study is to provide the first detailed mineralogical and fluid-inclusion description of emeralds from the Delbegetey deposit (Kazakhstan). The characteristic features of Delbegetey emeralds are established: they have dissolution figures on crystal faces, bluish colour and distinct colour zoning; the refractive indices are ω = 1.566–1.570, ε = 1.558–1.562, and the specific gravity is 2.65±0.005, relatively low for natural emeralds; they have very small concentrations of the impurities (Fe, Mg, Na and others) typical of other emeralds, and contain Cr and V; there is a significant preponderance of vapour in fluid inclusions of all types and there is liquid-to-vapour homogenization of primary fluid inclusions (at 395–420°C). The lattice oxygen isotope composition data obtained (δ18O SMOW value of 11.3%o) situate the deposit within the range characteristic of other granite-related emerald deposits. Emerald crystallization took place in low-density (0.40–0.55 g/cm3) aqueous fluid, with the following chemical composition (mol.%): 75.6-97.4 H2O, 0.0-18.4 CO2, 0.0-0.9 CH4, and 4.06-9.65 wt.% NaCl equiv. salinity. According to the calculated isochores, the pressure of formation of the Delbegetey emeralds can be estimated at 570–1240 bar.

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Amphibole lamellae formation in the upper mantle due to interaction of fluid inclusions and host minerals: a case study from Persani Mountains Volcanic Field, Transylvania

10.5194/egusphere-egu2020-1192 ◽

2020 ◽

Author(s):

Thomas Pieter Lange ◽

Zsófia Pálos ◽

Levente Patkó ◽

Márta Berkesi ◽

Nóra Liptai ◽

...

Keyword(s):

Fluid Inclusion ◽

Fluid Inclusions ◽

Upper Mantle ◽

Volcanic Field ◽

Planetary Science ◽

Mantle Xenoliths ◽

Fluid Inclusion Study ◽

Chemical Components ◽

Major Element Composition ◽

Host Mineral

Amphibole is one of the most abundant &#8217;water&#8217;-bearing minerals in the Earth&#8217;s upper mantle. Amphiboles occur as interstitial grains, lamellae within pyroxenes or as daughter minerals within fluid inclusions. &#160;Most commonly amphibole formation is related to mantle metasomatism, where the agent has a subducted slab (e.g. Manning 2004) or an asthenospheric origin (e.g. Berkesi et al. 2019). &#160;After the formation of fluid inclusions, a subsolidus interaction can take place where the H2O content of fluid inclusions may crystallize pargasite (e.g. Plank et al. 2016).Here we present amphibole lamellae formation in mantle xenoliths from the Persani Mountains Volcanic Field that is interrelated to a reaction between fluid inclusions and host clinopyroxene. &#160;Newly formed amphibole lamellae occur only in the surroundings of the fluid inclusions and grow within the host clinopyroxene in a preferred crystallographic direction. &#160;Studied lamellae do not reach the rim of the host mineral implying that components needed for formation of amphibole lamellae in clinopyroxene could have only originated from the fluid inclusion itself. &#160;We measured the major element composition of amphibole lamellae and host clinopyroxene (1) and used Raman spectroscopy and FIB-SEM on fluid inclusion study situated next to the lamellae (2). &#160;Results support the hypothesis that chemical components (dominantly H+) migrated sub-solidus from the fluid inclusion into the host mineral after fluid entrapment via subsolidus interaction. &#160;Beyond the clinopyroxene-hosted fluid inclusions, fluid inclusions in orthopyroxenes were also studied as a reference. &#160;Our study shows that post-entrapment diffusion from a fluid inclusion into the host mineral changes the solid/fluid ratio of the mantle &#160;which could modify the rheology of the lithospheric mantle.Berkesi, M. et al. 2019. Chemical Geology, 508, 182-196.Kov&#225;cs et al. (2017) Acta Geodaetica et Geophysica, 52(2), 183-204.Manning C. E. 2004. Earth and Planetary Science Letters, 223, 1-16.Plank, T. A. et al. 2016. In AGU Fall Meeting Abstracts.

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A fluid inclusion study of an amethyst deposit in the Cretaceous Kyongsang Basin, South Korea

Mineralogical Magazine ◽

10.1180/002646101750377515 ◽

2001 ◽

Vol 65 (4) ◽

pp. 477-487 ◽

Cited By ~ 3

Author(s):

K. H. Yang ◽

S. H. Yun ◽

J. D. Lee

Keyword(s):

Fluid Inclusion ◽

South Korea ◽

Fluid Inclusions ◽

Solidus Temperature ◽

Type Systems ◽

Biotite Granite ◽

Granitic Rocks ◽

Fluid Inclusion Study ◽

Quartz Crystals ◽

Inclusion Study

AbstractThe Eonyang amethyst deposit is thought to be spatially and temporally associated with the biotite granite of the Cretaceous Kyongsang Basin, South Korea. The euhedral quartz crystals in cavities in the aplite which intrudes biotite granite are colour-zoned from white at the base to amethystine at the top. Fluid inclusions from rock-forming quartz in granitic rocks and euhedral quartz crystals in cavities were examined. Three types of primary inclusions were observed and three isochores for inclusions representing each type are constructed to constrain the trapping conditions and fluid evolution involved during the formation of the amethyst. The intersection of the isochore representing the early fluid inclusions with solidus temperature of the host granite indicates initial quartz formation at ~600°C and 1.0–1.5 kbar. Intermediate quartz formation, associated with the high-salinity inclusions, occurred at somewhat lower temperatures (400°C) and pressures of ~1 kbar. The amethystine quartz formed from H2O–CO2–NaCl fluids at temperatures between 280 and 400°C, and pressures of ~1 kbar. Based on the texture and mineralogy of host minerals and on the fluid inclusion characteristics, the euhedral quartz began growing at near solidus conditions of the granite and the pressure did not vary significantly until the end of crystallization of amethystine quartz crystals in cavities. Early quartz in cavities formed from moderately saline fluids that either exsolved from or were in equilibrium with the granite, whereas the amethystine quartz apparently grew from fluids of at least partial sedimentary origin. The granite crystallized at considerable depth under relatively low water pressures probably in the root zones of porphyry-type systems. Hydrothermal activities, fluid compositions and erosion factors combined to provide favourable conditions for the formation of the Eonyang amethyst deposit and its presence near the Earth's surface today.

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