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PbSL dating of garnet and staurolite: Constraints on the

The North China Craton (NCC) was cratonization in the Paleoproterozoic by assembly of the Eastern and Western blocks along the Trans-North China Orogen (Zhao et al., 2001, Zhao et al., 2005). ... Garnet and staurolite grains were obtained from fresh samples 03JH073 and 03JH074 of garnet–staurolite–mica schist at location of N40°34′18.5 ...

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Staurolite: A metamorphic mineral famous for twinned …

The name "staurolite" is from the Greek word "stauros," which means "cross." The mineral commonly occurs as twinned, six-sided crystals that sometimes intersect at 90 degrees to form a cross. (An intersection angle of 60 degrees is more common.) In some localities these twinned crystals are collected, made into jewelry, and sold under the name ...

Staurolite: A metamorphic mineral famous for twinned …

Properties of Staurolite. Staurolite is a silicate mineral with a generalized chemical composition of (Fe,Mg) 2 Al 9 Si 4 O 23 (OH). It is usually brown or black in color with a resinous to vitreous luster. It ranges from transparent to opaque in diaphaneity. Staurolite is usually easy to identify when it occurs as visible grains in a ...

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Staurolite

Staurolite is an orthosilicate: ratio of (Si,Al):O is 1:4 and the silica tetrahedra are isolated from each other. Structurally similar silicate minerals are kyanite and garnet which tend to occur often together with staurolite as they are all Al-rich minerals formed during metamorphism. Other common metamorphic minerals that often occur with them are kyanite, muscovite, biotite, …

Staurolite

Transparency: Staurolite can be opaque, translucent or transparent. Crystallography: In terms of crystallography, staurolite can be monoclinic or orthorhombic. Luster: In terms of luster, staurolite can be dull, resinous or vitreous (glassy). Streak: Staurolite streaks white. Hardness: Staurolite's hardness ranges from 7 to 7.5 on the Moh's scale.

PbSL dating of garnet and staurolite: Constraints on the

Previously published age data of the Liaohe Group mainly consist of zircon U–Pb and biotite 40 Ar/ 39 Ar ages. Metamorphic minerals such as garnet and staurolite are important minerals that can be used to reconstruct the P/T paths in high-grade terrains, because they are involved in a number of reactions useful for thermobarometry (Essene, 1989), occur in a range …

Staurolite: Meaning, Properties, Benefits You Should Know

Staurolite with Kyanite: This union combines the calming energies of serenity and balance. This divine combination soothes the spirit, dissipates anxiety, and promotes clear communication. Staurolite with Muscovite: This harmonious blend supports spiritual growth, intuition, and the exploration of inner landscapes. It encourages self-reflection ...

Staurolite Gem Guide and Properties Chart

The name staurolite comes from the Greek word stauros, meaning cross. Staurolite is prized for its twinned crystals that intersect at 60 or 90 angles forming x-like or perpendicular crosses and specimens exhibiting these forms are highly prized by collectors.

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STAUROLITE: ITS LEGENDS & LORE

With its Mohs hardness of 7.0 to 7.5 and relatively high speci c gravity of 3.7 to 3.8, it is somewhat harder and denser than quartz. Staurolite's colors range from yellowish-brown and reddish-brown to brownish-black. Staurolite has a metamorphic origin and forms from the high-grade alteration of shale.

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Staurolite

A biotite-rich garnet (+ staurolite) bearing schist-quartzite zone below the MCT and above the Daling–Shumar Group is traceable across a major part of Bhutan (Fig. 8.3).This lithotectonic unit has been named as the Jaishidanda Formation by Dasgupta (1995a; see also Bhargava, 1995). Dasgupta (1995a) described the unit as "an almost persistent package of metasedimentary …

Ultrahigh-pressure corundum-rich garnetite in garnet

Corundum-rich garnetite occurs as an isolated lens in a garnet peridotite body in the Donghai area of the Sulu ultrahigh-pressure (UHP) terrane. This rock consists of garnet and corundum, along with minor crack-related zoisite, pargasite, Mg-staurolite, Mg-chloritoid, sapphirine and chlorite. Pyropic garnet (Prp54–63Grs26–36Alm10–12) exhibits a sinusoidal …

Staurolite: Mineral information, data and localities.

blue Co-bearing staurolite in high-grade "ferrolite" (staurolite-kyanite-quartz-magnetite gneiss), with kyanite, quartz, magnetite and scattered pleochroic violet/brown grains of a Co-dominant member of the högbomite family. ... 2.400 Å (60) 1.515 Å (60) 1.511 Å ... China . Anhui; Tongling; Tongguanshan ore field

Staurolite – Geology is the Way

Staurolite in thin section Staurolite is easy to recognize in thin section because of its characteristic colorless to golden yellow pleochroism, the typical pale yellow color, and prismatic habit with 6-sided basal sections. At parallel polars, …

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Staurolite in Metabasites: P–T–X Parameters and the

Abstract Fe–Mg staurolite is a typical and widespread mineral of medium-temperature high-alumina metapelites, whereas magnesian staurolite is only relatively rarely found in metamorphosed mafic rocks (metabasites). The most significant factors controlling staurolite stability in metabasites were identified by thermodynamic modeling and analysis of …

Staurolite: Meanings, Properties, Facts, And More.

Staurolite Meaning. This gemstone is believed to represent protection against evil spirits and give strength during challenging times. Staurolite also symbolizes hope and perseverance when it comes to reaching goals and dreams. Many believe that carrying a piece of staurolite will help them overcome obstacles they may face while striving toward success.

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Staurolite Mineral Data

PE Staurolite = 4.22 barns/electron U=PE Staurolite x rElectron Density= 15.15 barns/cc. Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units) Staurolite is Not Radioactive

Metamorphic records for subduction erosion and subsequent underplating

1 Introduction. Subduction erosion, by frontal and basal removal of crustal material from the overriding plate, is widely accepted as a fundamental process of crustal recycling at nearly all current convergent plate margins [von Huene and Scholl, 1991; Ranero and von Huene, 2000; von Huene et al., 2004; Scholl and von Huene, 2009].Globally, it accounts for nearly …

Staurolite

·Appearance and habit - Staurolite has diagnostic pleochroic yellow color. It often contains many quartz inclusions, sometimes giving a "swiss cheese" appearance. ·Interference colors - interference colors may range up to 1st order red but are often masked by the strong color of the mineral. ·Twinning - penetration twins are common but rarely can be seen in thin section

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The Origin Of Geological Terms: Staurolite

Staurolite is a hard mineral (Mohs hardness of 7 to 7.5, like quartz) and is resistant to weathering, so loose crystals and twins can often be found in sedimentary deposits of rivers. Staurolite ...

14 Metamorphism of Pelitic Rocks – Open Petrology

14.4.3 The Staurolite, Kyanite, and Sillimanite Isograds 14.20 Conditions of the staurolite, kyanite, and sillimanite isograds (in blue) Although extremely Fe-rich staurolite is stable in some unusual composition rocks at temperatures as low as 500 o C, transition from zone J to K (Figure 14.20) generally marks the staurolite isograd. Figure 14 ...