Stability and phase equilibria of chloride and carbonate bearing scapolites at 750°C and 4000 bar

Ellis, D. E.

doi:10.1016/0016-7037(78)90121-7

Cited by 97 publications

(56 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…There are many papers in the literature that contain quantitative calculations on the volatile activity of metamorphic fluids based on the chemistry of scapolite (e.g. Ellis, 1978;Moecher and Essene, 1991;Harley et al, 1994;Gómez-Pugnaire et al, 1994). Nowadays, there are two diametrically opposed views on the distribution of volatile components between scapolite and fluids.…”

Section: Discussionmentioning

confidence: 99%

“…These two elements occur in many metamorphic rockforming minerals and consequently can be determined in order to estimate their ratios in metamorphic fluids (Munoz and Swenson, 1981;Zhu and Sverjensky, 1991;Harley and Buick, 1992;Markl and Bucher, 1998). As a result, the chemistry of scapolite, and particularly its Cl and CO2 contents, in relation to the Cl and F content of other coexisting common metamorphic rockforming minerals, such as amphibole, mica, apatite and titanite, can be used as tracers for the chemical composition of the metamorphic fluid (Ellis, 1978;Munoz and Swenson, 1981;Binder and Troll, 1989;Mora and Valley, 1989;Kullerud, 1996;Rebbert and Rice, 1997;Markl and Bucher, 1998;Kullerud and Erambert, 1999;Yardley et al, 2000;Svensen et al, 2001). …”

Section: Discussionmentioning

confidence: 99%

“…The formation of marialite requires saline (around 20 wt.% NaCl) metasomatic fluids (Vanko and Bishop, 1982), which means that Cl-rich scapolite is an indicator of high NaCl activity during crystallization (Orville, 1975;Ellis, 1978;Vanko and Bishop, 1982). NaCl may have been original to the system or may have been derived from an external source (such as nearby sedimentary rocks, halite-bearing rocks or brines) through fluid migration.…”

Section: Discussionmentioning

confidence: 99%

See 2 more Smart Citations

Marialitic Scapolite Occurences From the Kimmeria-Lefkopetra Metamorphic Contact, Xanthi (N. Greece)

Mouchos¹,

Papadopoulou

Williamson

et al. 2017

geosociety

View full text Add to dashboard Cite

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Marialitic Scapolite Occurences From the Kimmeria-Lefkopetra Metamorphic Contact, Xanthi (N. Greece)

Mouchos¹,

Papadopoulou

Williamson

et al. 2017

geosociety

View full text Add to dashboard Cite

show abstract

“…(2) Plagioclase + CO 2 + Cl -aq → Scapolite Scapolite composition is largely related to the infiltrating fluid (e.g., Orville, 1975;Ellis, 1978;Aitken, 1983), and although not completely carbonated, these scapolites must have been formed in contact with a low-salinity, CO 2 -dominated fluid.…”

Section: Figure 10 Isocon Diagrams Of the Alteration Zones Plotted Amentioning

confidence: 99%

Orogenic degassing, scapolitization and K- metasomatism during Caledonian exhumation, Helgeland, Norway

Drivenes¹,

Sørensen²,

Larsen³

2016

NJG

View full text Add to dashboard Cite

Metasomatism associated with barren quartz veins cross-cutting hornblende schist in the upper part of the metasedimentary sequence of the WMo-mineralized Bjellatinden area was studied using P-T modeling of the mafic schist host and alteration assemblages, fluid inclusions, and isocon diagrams. Two main alteration assemblages are associated with the quartz veins: A biotite-scapolite-dominated zone (BSZ), and a zone dominated by chlorite, muscovite and calcite (CMZ), replacing the former BSZ and extending further into the wall rock. Three types of fluid inclusions are observed: CO 2 -rich (type I), low-salinity H 2 O-rich (type II), and high-salinity H 2 O-rich (type III). Type III fluids are strongly associated with the CMZ, and are not observed in the BSZ, whereas type I and II fluids are observed in quartz and scapolite in the BSZ. Type I and II fluid inclusions found in quartz in the CMZ are interpreted to be relics from the earlier BSZ alteration. Plagioclase-amphibole thermobarometry of grains in the hornblende schist indicates a near-isothermal pressure drop from ca. 660 to ca. 560 MPa at ca. 690°C. Type I and II fluids are interpreted to have infiltrated extension fractures at ca. 240 MPa and 600°C giving rise to the BSZ, and only minor mass exchange with the hornblende schist. Type III fluids are responsible for K -metasomatism of the existing alteration assemblage, and infiltrated the pre-existing fracture system over a large temperature range, from ca. 600°C to ca. 350°C during near-isobaric cooling at ca. 200 MPa. The CMZ was stabilized towards the end of this fluid infiltration. The high-salinity fluids are interpreted to have exsolved from an underlying, unexposed, granitic intrusion. This intrusion may also be the source of the W-Mo mineralizations in the area.

show abstract

“…As a result, at these pressure and temperature conditions, Ellis (1978) suggested that regional Cl-rich scapolite is formed from the metamorphism of evaporite beds. In addition, this interpretation has been confirmed by more recent studies that have also suggested that the reaction of plagioclase with halite and calcite during regional metamorphism can generate scapolite (Mora and Valley, 1989;Frietsch et al;1997).…”

mentioning

confidence: 99%

Evidence of multiple halogen sources in scapolites from iron oxide-copper-gold (IOCG) deposits and regional Na Cl metasomatic alteration, Norrbotten County, Sweden

et al. 2017

View full text Add to dashboard Cite

Please cite this article as: Bernal, Nelson F., Gleeson, Sarah A., Smith, Martin P., Barnes, Jaime D., Pan, Yuanming, Evidence of multiple halogen sources in scapolites from iron oxide-copper-gold (IOCG) deposits and regional Na¡ce:glyph name="sbnd"/¿Cl metasomatic alteration, Norrbotten County, Sweden, Chemical Geology (2017), doi:10.1016/j.chemgeo.2017 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. Overall, the data in this study suggest that halogens in early scapolites were derived from residual brines and halite, during metamorphism of evaporites linked to the RM alteration. Later in the history of the Norrbotten district components of the RM alteration were recycled and mixed during magmatic and local metasomatic events to varying extents, resulting in the brines associated with IOCG alteration. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT A C C E P T E D M A N U S C R I P T

show abstract

Stability and phase equilibria of chloride and carbonate bearing scapolites at 750°C and 4000 bar

Cited by 97 publications

References 15 publications

Marialitic Scapolite Occurences From the Kimmeria-Lefkopetra Metamorphic Contact, Xanthi (N. Greece)

Marialitic Scapolite Occurences From the Kimmeria-Lefkopetra Metamorphic Contact, Xanthi (N. Greece)

Orogenic degassing, scapolitization and K- metasomatism during Caledonian exhumation, Helgeland, Norway

Evidence of multiple halogen sources in scapolites from iron oxide-copper-gold (IOCG) deposits and regional Na Cl metasomatic alteration, Norrbotten County, Sweden

Contact Info

Product

Resources

About