High potassium-chlorine-bearing hastingsites in skarns from Primorye, Far East USSR

Gulyaeva, T.L.; Gorelikova, N. V.; Карабцов, А. А.

doi:10.1180/minmag.1986.050.358.21

Cited by 16 publications

(7 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, relatively higher Al IV values are accompanied by relatively higher Ti content (same analyses in Table 1) or FeO content (analysis V5144 in Table 1). Correlation of Cl with Al IV has already been noted by Mével (1984), Vanko (1986), Suwa et al (1987), Castelli (1988), Morrison (1991), and Enami et al (1992), whereas Gulyaeva et al (1986) and Suwa et al (1987) showed high Cl values only in Fe-rich amphiboles. Such correlations among Cl, Al IV, and Fe 2+ have been explained recently in terms of crystal structure of calcic amphiboles (Oberti et al, 1993).…”

Section: Amphibolementioning

confidence: 52%

Vein Formation Mechanisms in the Sheeted Dike Complex from Hole 504B

Tartarotti¹,

Allerton²,

Laverne³

1995

Proceedings of the Ocean Drilling Program, 137/140 Scientific Results

View full text Add to dashboard Cite

Diabases were recovered during Legs 137 and 140 at Hole 504B from depths between 1621.5 and 2000.4 meters below seafloor in the lower sheeted dike complex. The samples contain multiple generations of millimetric to centimetric veins. The orientation of the measured veins suggests that two main vein sets exist: one characterized by shallow dipping and the other by random trend. Thermal contraction during rock cooling is considered the main mechanism responsible for fracture formation. Vein infill is related to the circulation of hydrothermal fluids near the spreading axis. Some veins are surrounded by millimeter-sized alteration halos due to fluid percolation from the fractures through the host rock. Vein-filling minerals are essentially amphibole, chlorite, and zeolites. Amphibole composition is controlled by the microstructural site of the rock. Actinolite is the main amphibole occurring in the veins and also in the groundmass away from the halos. In the alteration halos, amphibole shows composition of actinolitic hornblende and Mg-hornblende. Late-stage tension gashes and interstitial spaces in some amphibole-bearing veins are filled with zeolites, suggesting that the veins likely suffered multiple opening stages that record the cooling history of the circulating fluids. Evidence of deformation recorded by the recovered samples seems to be restricted to veins that clearly represent elements of weakness of the rock. On the basis of vein geometry and microstructure we infer structural inteΦretations for the formation mechanism and for deformation of veins.

show abstract

Section: Amphibolementioning

confidence: 52%

Vein Formation Mechanisms in the Sheeted Dike Complex from Hole 504B

Tartarotti¹,

Allerton²,

Laverne³

1995

Proceedings of the Ocean Drilling Program, 137/140 Scientific Results

View full text Add to dashboard Cite

show abstract

“…In a survey of the terrestrial literature, Gulyaeva et al. () commented that ~20 localities of chlorine‐bearing potassium amphibole were known. Since their own samples had not more than 2.68 wt% Cl (<0.4 apfu), clearly they were not meaning to restrict this count to localities with >1.0 apfu Cl.…”

Section: Terrestrial Localities With Chloro‐amphibolementioning

confidence: 99%

The formation environment of potassic‐chloro‐hastingsite in the nakhlites MIL 03346 and pairs and NWA 5790: Insights from terrestrial chloro‐amphibole

Giesting

Filiberto

2016

Meteorit & Planetary Scien

View full text Add to dashboard Cite

Potassic-chloro-hastingsite has been found in melt inclusions in MIL 03346, its paired stones, and NWA 5790. It is some of the most chlorine-rich amphibole ever analyzed. In this article, we evaluate what crystal chemistry, terrestrial analogs, and experiments have shown about how chlorine-dominant amphibole (chloro-amphibole) forms and apply these insights to the nakhlites. Chloro-amphibole is rare, with about a dozen identified localities on Earth. It is always rich in potassium and iron and poor in titanium. In terrestrial settings, its presence has been interpreted to result from medium to high-grade alteration (>400°C) of a protolith by an alkali and/or iron chloride-rich aqueous fluid. Ferrous chloride fluids exsolved from mafic magmas can cause such alteration, as can crustal fluids that have reacted with rock and lost H 2 O in preference to chloride, resulting in concentrated alkali chloride fluids. In the case of the nakhlites, an aqueous alkali-ferrous chloride fluid was exsolved from the parental melt as it crystallized. This aqueous chloride fluid itself likely unmixed into chloride-dominant and water-dominant fluids. Chloridedominant fluid was trapped in some melt inclusions and reacted with the silicate contents of the inclusion to form potassic-chloro-hastingsite.

show abstract

“…Constructive reviews by Prof. S. Kobayashi and Dr. [4] Al and Cl of K -rich calcic amphiboles with [4] Al ≥ 1.5 apfu and [A] (Na + K) ≥ 0.5 apfu. The chemical data are from Borley (1963), Krutov and Vinogradova (1966), Leelanandam (1970), Czamanske et al (1977), Hawthorne and Grundy (1977), Dick and Robinson (1979), Sharma (1981), Shimazaki et al (1984), Matsubara and Motoyoshi (1985), van Marcke de Lummen and Verkaeren (1985), Gulyaeva et al (1986), Suwa et al (1987), Sawaki (1989), Morrison (1991), Enami et al (1992), Oberti et al (1993), Shira ishi et al (1994, Deer et al (1997), Robinson et al (1997), Sato et al (1997), Sokolova et al (2000), Chukanov et al (2002), Mazdab (2003), Banno et al (2004), Pekov et al (2005), Korinevskiy and Korinevskiy (2006), Sautter et al (2006) and Banno et al (this study). The Cl contents of K -rich amphiboles described by Shimazaki et al (1984) and Sawaki (1989) were not given, but they pointed out that qualitative analyses of these amphiboles show no appreciable amount of chlorine.…”

Section: Acknowledgmentsmentioning

confidence: 99%

Potassic-ferropargasite, a new member of the amphibole group, from Kabutoichiba, Mie Prefecture, central Japan

Banno

Miyawaki

Matsubara

et al. 2009

Journal of Mineralogical and Petrological Sciences

View full text Add to dashboard Cite

(OH) 2 , is a new member of the amphibole group occurring in a schistose calcareous hornfels from Kabutoichiba, Kameyama, Mie Prefecture, central Japan. The amphibole occurs as black subhedral to anhedral crystals, up to about 700 µm long, associated with calcite, biotite, K -feldspar, plagioclase, scapolite, chlorite and titanite. Potassic -ferropargasite is optically biaxial negative with α = 1.680(2), β = 1.690 (calc.), γ = 1.698 (2) (100) Σ2.00 on the basis of O = 23, assuming OH + F + Cl = 2. The crystal structure of the clinoamphibole type was refined to an R of 6.5%.

show abstract

High potassium-chlorine-bearing hastingsites in skarns from Primorye, Far East USSR

Abstract: High potassium-chlorine-bearing hastingsites in skarns from Primorye, Far East USSR CHLORINE-BEARING potassium amphiboles are typical of metasomatites from ore deposits, particularly iron-ores, but sometimes occur in granites, potassic syenites, and gneisses (

Cited by 16 publications

References 5 publications

Vein Formation Mechanisms in the Sheeted Dike Complex from Hole 504B

Vein Formation Mechanisms in the Sheeted Dike Complex from Hole 504B

The formation environment of potassic‐chloro‐hastingsite in the nakhlites MIL 03346 and pairs and NWA 5790: Insights from terrestrial chloro‐amphibole

Potassic-ferropargasite, a new member of the amphibole group, from Kabutoichiba, Mie Prefecture, central Japan

Contact Info

Product

Resources

About