plagioclase mineral in myanmar

Plagioclase - Wikipedia

Plagioclase is a series of tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific chemical composition, plagioclase is a continuous solid solution series, more properly known as the plagioclase feldspar series. This was first shown by the German mineralogist Johann Friedrich Christian Hessel (1796–1872) in 1826.

Plagioclase: The mineral Plagioclase information and pictures

The Plagioclase series is a group of related feldspar minerals that essentially have the same formula but vary in their percentage of sodium and calcium. Albite and Anorthite are the end members of the series, with the intermediary minerals Oligoclase, Andesine, Labradorite, and Bytownite. The acclaimed Dana's System of Mineralogy lists the intermediary members as individual minerals, whereas ...

Petrogenesis and tectonic implications of gabbro and ...

Jul 01, 2017  The plagiogranites are mainly composed of plagioclase, quartz and amphibole, with small amount of accessory minerals, such as zircon, apatite and rutile. Plagioclase in the gabbros varies from andesine to anorthite (An 37–91), whereas plagioclase in the plagiogranites is less calcic (An 1–40). Clinopyroxene in the gabbros is pervasively ...

Petrogenesis and tectonic implications of gabbro and ...

Jul 01, 2017  Centimeter-size intrusions of gabbros and plagiogranites occur in mantle peridotites of the Myitkyina ophiolite, Myanmar. The gabbros mainly consist of plagioclase and clinopyroxene, whereas orthopyroxene occasionally occurs. The plagiogranites are mainly composed of plagioclase, quartz and amphibole, with small amount of accessory minerals, such as zircon, apatite and rutile.

Plagioclase Mineral Data

Plagioclase Labradorite. Comments: Dual view of a cleavage fragment of labradorite showing the multi-colored labradorescence (schiller effect) and the same area viewed without the color.The color is due to optical interference on Bøggild exsolution lamellae. Location: Ihosy, Betroka district, Toliara Province, Madagascar.Scale: Picture size 3x3 cm. ...

Petrology and Geochemistry of Basalts from Tonnge Area ...

Tonnge basalt is a relatively small basaltic field situated in the Tigyaing Township, Sagaing Region, Myanmar. This basaltic field is considered as one of the occurrences of younger extrusive rocks along the major strike-slip fault of central Myanmar. ... followed by other minerals such as plagioclase, pyroxene, and Fe-Ti oxides. Absence of ...

Distribution and variation of plagioclase compositions on Mars

mineral in the Martian crust, plagioclase feldspar. [3] Plagioclase is a challenging mineral to study remotely. It cannot be detected at visible light spectrometer near‐ infrared (VIS‐NIR) wavelengths, and even rover studies have had to infer plagioclase compositions from normative values modeled from bulk chemistry [e.g., McSween et al ...

Geology of Myanmar - Wikipedia

Mineral belts. Myanmar hosts a variety of ore-deposits with economic significance and global recognition. It is a global source of true jade and produces some of the world's finest rubies, with mines in the Mogok Valley providing the bulk of the world's supply for centuries. ...

Mining in Myanmar

As measured by reserves, Myanmar hosts at least three mineral deposits of global significance: the Bawdwin lead-zinc-silver deposits; the Monywa copper deposits; and the Mawchi tin and tungsten mine.29 In 2014, Myanmar produced 10% of the world's mined tin supply (as opposed to

Feldspars - all about the plagioclases and K-feldspars

Aug 11, 2018  Plagioclase. The plagioclase group consists of albite-anortite series of feldspars. With the 50% rule, all of the mineral members occuring between these two are not considered valid minerals by IMA. Basically, 50% rule says that Na dominant plagioclase is now

Plagioclase: Mineral information, data and localities.

Redfern, S.A.T., Salje, E. (1987) Thermodynamics of plagioclase II: temperature evolution of the spontaneous strain at the I1‾ ↔ P1‾ phase transition in anorthite. Physics and Chemistry of Minerals

Late Eocene-Oligocene granulite facies garnet-sillimanite ...

Apr 01, 2021  The Mogok Metamorphic Belt (MMB) in central Burma (Myanmar) is a granulite-upper amphibolite facies belt that runs the length of Myanmar from the Andaman Sea in the south to the East Himalayan syntaxis in the north (Chhibber, 1934a, Chhibber, 1934b; D.L. Searle and Haq, 1964; M.P. Searle et al., 2007, Searle et al., 2017, Searle et al., 2020; Myanmar Geosciences Society, 2012).

(PDF) The Geology and Skarn Cu-Bi-Au Mineralization at ...

associated with opaque mineral (TGM8), (d) ore minerals occurring in the fracture of primary mineral in altered dio- ritic rock (TGM8), and (e, f ) plagioclase, hornblende, and

Geology and Skarn Cu–Bi–Au Mineralization at Shwe Min Bon ...

Aug 16, 2018  The MMB is one of the most important mineral belts in Myanmar (e.g. Zaw, 2017). Many different types of ore deposits occur within the MMB and Shan scarp zone. Mesothermal, orogenic Au deposits in Myanmar are found in the Slate belt, located in the southern part of the MMB (e.g. Modi Taung) (Swe et al., 2017; Zaw et al., 2017).

China's rare earth supplies disrupted by Myanmar tumult ...

Mar 22, 2021  YANGON – Fears are growing of a global shortage of rare earth minerals used in the manufacture of high-tech devices as unrest in Myanmar following the February 1 coup disrupts exports to China.. Chinese companies started complaining about delays in shipments of the minerals since mid-March, reportedly due to the deteriorating political and economic situation, which Chinese media

Jurassic to Miocene magmatism and metamorphism in the ...

May 22, 2003  Euhedral plagioclase (An33) is normally zoned and is included and resorbed by extensive pools of microcline. Accessory minerals include titanite, apatite and zircon. All members of the Yebokson B Suite are metaluminous, magnetite‐series, I‐type granitoids ranging in composition from tonalite to granodiorite [ Cobbing et al. , 1992 ].

Geology of the High Sulfidation Copper Deposits, Monywa ...

Dec 22, 2010  The 50 km 2 Monywa copper district lies near the Chindwin River within the northward continuation of the Sunda‐Andaman magmatic arc through western Myanmar. There are four deposits; Sabetaung, Sabetaung South, Kyisintaung, and the much larger Letpadaung 7 km to the southeast. Following exploration drilling which began in 1959, production of copper concentrates from a small

Moonstone (gemstone) - Wikipedia

The most common moonstone is of the orthoclase feldspar mineral adularia, named for an early mining site near Mt. Adular in Switzerland, now the town of St. Gotthard. A solid solution of the plagioclase feldspar oligoclase +/− the potassium feldspar orthoclase also produces moonstone specimens .

Myanmar - Wikipedia

Myanmar (English pronunciation below; Burmese: မြန်မာ) or Burma (Burmese: ဗမာ), officially the Republic of the Union of Myanmar, is a country in Southeast Asia. Myanmar is bordered by Bangladesh and India to its northwest, China to its northeast, Laos and Thailand to its east and southeast, and the Andaman Sea and the Bay of Bengal to its south and southwest.

Labradorite Plagioclase Image - Web Mineral

Mineral: Labradorite: (Ca,Na)(Si,Al)4O8 Plagioclase: (Na,Ca)(Si,Al)4O8; Comments: Dual view of a cleavage fragment of labradorite showing the multi-colored labradorescence (schiller effect) and the same area viewed without the color. The color is due to optical interference on Bøggild exsolution lamellae. Location:

(PDF) Geochemical and mineralogical research of tin ...

Myanmar is perhaps one of the world's most prospective but least explored minerals jurisdictions, containing important known deposits of tin, tungsten, copper, gold, zinc, lead, nickel, silver ...

Gabbro - an overview ScienceDirect Topics

The main ingredients of dolerite and diabase are mafic lath-shaped plagioclase of about 60% (labradorite and rarely bytownite) set in a finer matrix of clinopyroxene (typically 20–30% augite) and ±olivine (up to 10% in olivine diabase), magnetite and ilmenite (Fig. 4.21). The accessory minerals are chlorine, uralite and calcite.

Plagioclase - Melt Equilibria

anorthite mineral/melt equilibria, overlap within uncertainty over the interval of 1000 and 1200ºC. In the temperature range of 1110 ± 40ºC the water contents calculated from the plagioclase-melt equilibria are generally below that postulated by Eggler, and are much closer to

Petrogenesis and tectonic implications of gabbro and ...

Centimeter-size intrusions of gabbros and plagiogranites occur in mantle peridotites of the Myitkyina ophiolite, Myanmar. The gabbros mainly consist of plagioclase and clinopyroxene, whereas ...

mogok2 — PalaMinerals

Mesh-like structure of serpentine minerals in serpentinite at Mya-sein-Taung, XN, 25 X: 3.18: Photograph showing highly jointed nature in augite-biotite granite at the peak of Taung-me Taung 22° 58' 18.4" N, 96° 28' 8.5" E: 3.19: Twinned plagioclase (Pgl), augite (Aug) and quartz grains in augite-biotite granite, Taung-me Taung; between XN ...

Plagioclase Feldspar Physical-Optical Properties ...

Plagioclase is a continuous series of solid solutions known as the plagioclase feldspar series, rather than a specific mineral with a particular chemical composition. The series ranges from albite to anorthite endmembers (with respective compositions NaAlSi3O8 to CaAl2Si2O8), where sodium and calcium atoms can substitute for each other in the ...

Locations for Feldspar Feldspar

Plagioclase feldspars are the most common rock forming mineral on earth and form the ground-mass of many mafic, felsic, and intermediate rock. Sodium rich plagioclase or albite is present in more felsic rocks and is associated with alkali feldspar, mica, quartz, and many other minerals.

Gabbro - an overview ScienceDirect Topics

The main ingredients of dolerite and diabase are mafic lath-shaped plagioclase of about 60% (labradorite and rarely bytownite) set in a finer matrix of clinopyroxene (typically 20–30% augite) and ±olivine (up to 10% in olivine diabase), magnetite and ilmenite (Fig. 4.21). The accessory minerals are chlorine, uralite and calcite.

Geology and Skarn Cu–Bi–Au Mineralization at Shwe Min Bon ...

Aug 16, 2018  The MMB is one of the most important mineral belts in Myanmar (e.g. Zaw, 2017). Many different types of ore deposits occur within the MMB and Shan scarp zone. Mesothermal, orogenic Au deposits in Myanmar are found in the Slate belt, located in the southern part of the MMB (e.g. Modi Taung) (Swe et al., 2017; Zaw et al., 2017).

Myanmar (Burma): Mining, Minerals and Fuel Resources

Industrial Minerals and Gemstones. Myanmar is the largest jade producer in the world and is one of the only countries in the world to produce jadeite, the highest quality of jade. Jade export in the financial year 2014–2015 was more than $1 billion; however, this export fell in consecutive years. Precious and semi-precious stones accounted ...

Plagioclase - Melt Equilibria

anorthite mineral/melt equilibria, overlap within uncertainty over the interval of 1000 and 1200ºC. In the temperature range of 1110 ± 40ºC the water contents calculated from the plagioclase-melt equilibria are generally below that postulated by Eggler, and are much closer to

Spinel - Wikipedia

Spinel, (Mg,Fe)Al 2 O 4, is a common mineral in the Ca-Al-rich inclusions (CAIs) in some chondritic meteorites. [citation needed] Geographical occurrence . Spinel has long been found in the gemstone-bearing gravel of Sri Lanka and in limestones of the Badakshan Province in modern-day Afghanistan and Tajikistan; and of Mogok in Myanmar.

Minerals Free Full-Text Identification of Opaque ...

Every ruby selected contained opaque, mineral inclusions with metallic luster. In one case, the opaque mineral is not present as an inclusion. This sample (A6), from the Baw Lon Gyi mining area in Mogok, Myanmar, has an opaque mineral in the matrix attached to the ruby, rather than as an inclusion.

Calcic plagioclase: Mineral information, data and localities.

Svetoslav Petrussenko, Iliya Dimitrov, Kostadin Glushkov, Lubomir Metodiev (2007) A Wonderful World of Minerals (Minerals, Mineral Deposits and Localities from the Area of the Town of Chepelare). Fourth International Symposium Mineral Diversity Research and Preservation pp229-233

Geology and Petrography of the Igneous Rocks exposed at ...

Myanmar extends from Putao and the jade mining areas ... quartz, plagioclase and alkali-feldspar with minor amount of biotite, pyrite and iron ore minerals. ... It is composed of quartz, orthoclase and plagioclase. Minor constituent minerals, such as pyrite and zeolite. This rock is fine grained, hypocrystalline and porphyritic ...

Minerals Free Full-Text Petrogenesis, Ore Mineralogy ...

Most of the granite-related Sn–W deposits in Myanmar are located in the Western Granitoid Province (WGP) of Southeast Asia. The Tagu deposit in the southern part of the WGP is a granite related Sn–W deposit. The biotite granite is composed of quartz, feldspars (plagioclase, orthoclase, and microcline), and micas (muscovite and biotite) and belongs to S-type peraluminous granite.

The petrology of a complex sodic and sodic–calcic ...

In the Myanmar jadeitite area of Pharkan, amphibole felses occur between jadeitites and serpentinized dunites. These so-called amphibole fels boundary zones were studied optically and by electron microprobe, and found to include the six amphibole species magnesiokatophorite (Mg-kat), nyböite (Nyb), eckermannite (Eck), glaucophane (Gln), richterite (Rich) and winchite (Win).

Copyright © 2020.Company name All rights reserved.SiteMap