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⇱ Omphacite from Sierra del Convento, Guantánamo Province, Cuba


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Omphacite from
Sierra del Convento, Guantánamo Province, Cuba

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Locality type:Sierra
Classification
Species:Omphacite
Formula:(NaaCabFec2+Mgd)(AleFef3+Feg2+Mgh)Si2O6
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Omphacite data
Locality Data:Click here to view Sierra del Convento, Guantánamo Province, Cuba
Data Identifiers
Mindat Occurrence Record ID:638734
Long-form Identifier:1:3:638734:1
GUID (UUID V4):0
References
Reference Search (possible matching items)
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Journal (article/letter/editorial)
origin and age of jadeitites from Sierra del Convento Mélange (Eastern Cuba) JUAN CÁRDENAS-PÁRRAGA1,*,...Abstract: Jadeitite (jadeite jade) from Sierra del Convento (eastern Cuba) occurs in a subduction-related serpentinite-matrix...inclusions and omphacite exsolution in jadeite crystals, as well as replacement or infilling by omphacite. Minor...environment. Late-stage crystallizations include omphacite, albite and epidote from fluids nearly saturated...high-temperature, Eastern Cuba, Caribbean. 1. Introduction localities occur in the Sierra del Convento mélange (Garcı́a-Casco
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Journal (article/letter/editorial)
PAPER A new jadeitite jade locality (Sierra del Convento, Cuba): first report and some petrological and...serpentinite-matrix subduction mélange of the Sierra del Convento (eastern Cuba) in a context associated with tectonic...are varied and include combinations of jadeite, omphacite, albite, paragonite, analcime, clinozoisite-epidote...MineroMetalúrgico, Las Coloradas s/n., Moa 83329, Holguı́n, Cuba J. Cárdenas Párraga  C. Lázaro  I. Blanco Quintero...Obispo no. 61, Plaza de Armas, 10100 La Habana, Cuba Y. Rojas Agramonte  A. Kröner Institut für Geowissenschaften
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Journal (article/letter/editorial)
mélange is distributed in the Caribbean (Guatemala, Cuba, and Dominican Republic), circum-Pacific (Japan...South of Motagua fault, Guatemala 3. Sierra del Convento, Cuba Locality Jadeitite Table 1. Summary...HP-LT conditions, including garnet amphibolite, omphacite-taramite-zoisite rock, albitite, phengiticmuscovite...lower P-T trajectory with garnets containing both omphacite and clinozoisite and interpreted P-T of 550–600...125–113 Ma (Harlow et al., 2004). 2.3. Sierra del Convento, Cuba 2.2. South of Motagua fault, Guatemala
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Journal (article/letter/editorial)
clinozoisite-eclogite, and jadeitite, albitite, mica rock, and omphacite-taramite TE rock (Harlow, 1994, Harlow et al...mica albite rock, etc.) RI as well as taramite omphacite rocks, chloritite and rarely garnet metabasite...occasional dark blue-green veins colored by blue omphacite (Harlow et al., 2004b). Coexisting lithologies...blueschist-altered eclogite, lawsonitite, glaucophane-omphacite rock, garnet-quartz-phengite schist, and graphite-bearing...Coexisting tectonic blocks in the area SC are omphacite-glaucophane blueschist and epidote-amphibolite
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Journal (article/letter/editorial)
of the Motagua Fault Zone, Guatemala; Sierra del Convento, Cuba; Rio San Juan Complex, Dominican Republic)...Zone (Harlow 1994; Harlow et al. 2011), Sierra del Convento (García-Casco et al. 2009; Cárdenas-Párraga...for zircon from the jadeitites of the Sierra del Convento in Cuba (hydrothermal zircon, Cárdenas-Párraga...high-pressure metamorphic rocks including garnet-omphacite blueschists, jadeite-lawsonite blueschists, both...their P–T paths (all clockwise): P–T paths of omphacite-free and jadeite-lawsonite blueschists follow
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Journal (article/letter/editorial)
K)AlSiO4 — Ol Olivine (Mg,Fe)2 SiO4 — Omp Omphacite Ideally (CaNa)[(Mg,Fe)Al](Si2 O6 )2 Pyroxene...in eastern Cuba eventually spurred the recognition of the jadeitites of Sierra del Convento (Garcı́a-Casco...occurrences: for example, the Baja Verapaz and Sierra de Santa Cruz ultramafics (ophiolitic) north of...Moa-Barracoa ophiolite north of the Sierra del Convento mélange in eastern Cuba (Garcı́a-Casco et al. 2009)...and in print Zrn: 113 Ma PS PB PB , R Sierra del Convento, Cubac Rı́o San Juan complex, Dominican
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Journal (article/letter/editorial)
mostly consisting of jadeite, ‘‘omphacite jade’’ mostly consisting of omphacite (Ou Yang, 2006; Ou Yang et...compositions, pure jadeite and tiny exsolution blebs of omphacite within jadeite (Fig. 2b), the composition of which...an association of Napyroxenes with jadeite and omphacite compositions both showing a complex zoning (Fig...where pure jadeite contains exsolution blebs of omphacite. (online version in colour) eschweizerbart_xxx...coexisting, plotting in the fields of jadeite and omphacite, respectively. (online version in colour) Fig
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Journal (article/letter/editorial)
subduction-zone complex of the Escambray Massif in central Cuba have been studied by optical and transmission electron...jadeite, the latter with rims and patches of omphacite. TEM observations indicate extensive replacement...replacement of magmatic pyroxene by jadeite and omphacite along a broad front encroaching upon the augite...presumably plagioclase was formerly present. Omphacite dominates where augite is internally replaced...are replaced by jadeite together with lesser omphacite in epitactic relationship with the enclosing augite
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Report (article/chapter)
of pyroxenes rich in this component (as in the omphacite common in eclogite), called for high-pressure–low-temperature...described jadeitite from the Sierra del Convento region of eastern Cuba. Maresch et al. (2012) presented...possible occurrence in the Escambray area of central Cuba, briefly mentioned by Millán & Somin (1981). The...might have come from more distant sources such as Cuba or Guatemala (Harlow 1994; Seitz et al. 2001; Harlow...well as jadeite-rich albite rocks, jadeite-rich omphacite rocks and rare pumpellyite-bearing jadeite-rich
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Journal (article/letter/editorial)
thickness in blocks of jadeitelawsonite- or omphacite-garnetbearing blueschist of the mélange. Two...important phases so far found in both suites are omphacite, phengite, glaucophane, epidote, albite, calcite...high-pressure matrix minerals such as jadeite and omphacite, indicating coeval zircon growth. The cores of...subduction zone exposed in neighbouring eastern Cuba, are possible. Jadeitites and jadeite-rich rocks...rare high-temperature jadeitite as documented in Cuba. Key-words: Rio San Juan Complex, jadeitite, blueschist
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Journal (article/letter/editorial)
shiguanghai@263.net.cn; shigh@cugb.edu.cn 3 Guangdong Province Material Testing Center, Guangzhou 510080, PR...species, including jadeite, omphacite, kosmochlor, Cr-bearing jadeite-omphacite, albite, celsian, banalsite...newly reported here. Amphiboles, kosmochlor and omphacite formed closely related to the paragenetic sequence...jadeite, and the clinopyroxene in mafic rock by omphacite. Relict ilmenite replaced by titanite in omphacitite...species of amphibole, terrestrial kosmochlor and omphacite (Ou Yang, 1984; Harlow & Olds, 1987; Shi et al
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Journal (article/letter/editorial)
associated with albitite and omphacite–bearing rocks such as omphacite–bearing metagabbros and omphacitite...facies metamorphism according to the occurrence of omphacite and magnesio–riebeckite (Nishiyama and Miyazaki...scientific research can be donated by the authors. Omphacite–bearing rocks occur also in the Mie mélange and...meta–hornblendite, albitite, zoisite rock, rodingite, omphacite–bearing metagabbro, omphacitite, and jadeitite...in a very limited area together with albitite, omphacite–bearing metagabbro and omphacitite (Nishiyama
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Journal (article/letter/editorial)
et al., 2012). Abbreviations for the main units: Sierra de Santa Cruz ophiolite (SSC), Baja Verapaz ophiolite...serpentinite mélange that hosts garnet amphibolite, omphacite–taramite metabasite, jadeitite, albitite, and...lesser amounts of paragonite (Pg), phengite (Ph), omphacite (Omp), albite (Ab), minor zircon (Zrn), apatite...Mon—monazite, Ms—Muscovite, Ne—nepheline, Omp—omphacite, Pg—paragonite, Ph— phengitic muscovite, Phl—phlogopite...Omp is unaffected. Zircons are contained within omphacite and albite and contain Omp and fluid inclusions
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Journal (article/letter/editorial)
peridotite massifs: GH, Gaspar Hernández; LC, Loma del Catey; LM, Loma El Morrito; EH, Helechal. Locations:...porphyroblasts growing in an S1J foliation with omphacite, zoisite, rare phengite and rutile define an M1J...(2008) for the same eclogite and one sample of omphacite–blueschist, respectively. These authors also obtain...5, 80.3 ± 1.1 and 62.1 ± 1.4 Ma for eclogite, omphacite blueschist and jadeite blueschist, respectively...subduction-related Mabujina Amphibolite Complex, Central Cuba. For these authors, the Precambrian ages suggest
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Journal (article/letter/editorial)
crystals, minor omphacite, and little analcime, and Type II, comprising mainly omphacite and analcime,...northern Motagua Fault Zone in Guatemala [1–3], Cuba [4], Dominica [5], Japan (Itoigawa–Omi [6], Osayama...this location is jadeite + albite + analcime + omphacite, which can be found in block and water drop shapes...(Type I) and jadejadeite–omphacite–analcime domains (Type II). ite–omphacite–analcime domains (Type II)...predominately of jadeite crystals (~90 vol.%), minor omphacite (~9I MTDs vol.%) consists and analcime (~1 vol
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Journal (article/letter/editorial)
conditions of selected jadeitites from Guatemala, Cuba, Iran, Dominican Republic, and Italian Alps (modified...Southern Motagua Mélange (Guatemala); SC, Sierra del Convento (Cuba); IR, Iran; RSJC, Rio San Juan Complex...taramite–jadeitite; 2Cpx–JD, two pyroxene ( jadeite + omphacite) jadeitite; Ky–JD, kyanite–jadeitite. P and E...as the compositional gap between jadeite and omphacite are another index to assess temperature. Harlow...amphibole, two coexisting pyroxenes ( jadeite + omphacite), and kyanite, they defined five mineralogical types;
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Journal (article/letter/editorial)
construction of the Escambray nappe stack, central Cuba. A review Klaus P. STANEK1,*, Walter V. MARESCH2... USA Abstract: The Escambray Massif of central Cuba is the largest metamorphic complex exposed in the...metamorphism; Lu–Hf, U–Pb and Ar–Ar geochronology; Cuba. 1. Introduction 1.1. Regional setting of subduction-related... but collisional features are best preserved on Cuba. The subduction-related metamorphic rocks shown...central Cuba: a case study The nappe stack exposed in the Escambray Mountains (Fig. 1b) of Cuba represents
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Report (article/chapter)
implications from structural and geochronological data of Cuba K. P. STANEK1*, W. V. MARESCH2 & J. L. PINDELL3...n. Magmatism ceased at least in onshore central Cuba at about 75 Ma, probably as the southern edge of...metamorphism of high-pressure metamorphic rocks in Cuba cluster at 70 Ma; rapid uplift/ exhumation of these...Bahamas Platform along the Eocene suture zone in Cuba. Between the arc’s interaction with Yucatán and...Caribbean. Although magmatism ceased in central Cuba by 75 Ma, traces of continuing Early Palaeogene
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Journal (article/letter/editorial)
to the east to form the Greater Antilles islands (Cuba, Jamaica, Hispaniola, Puerto Rico and the Virgin...Albian–Coniacian Quibiján and Téneme Formations, Cuba (Groups 3T and 3Q1 — Marchesi et al., 2007); (6)...phengite–omphacite–whole rock metamorphic age determination of 118.2 ± 0.6 Ma for an eclogite from Cuba. Pindell...(2011) suggested that subduction initiation in the Cuba region would have occurred prior to ~ 130 Ma. Similarly...on modelled P–T–t paths in the Sierra del Convento mélange, Eastern Cuba. Many of the P–T–t paths are based
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Journal (article/letter/editorial)
Jd94Ae6 to Jd63Ae36, and without any coexisting omphacite. This contrasts with Jd-Di or Jd-Aug compositional...sources moving over recent time from Guatemala to Cuba and Hispaniola (Garcı́a-Casco et al., 2009, Schertl...Islands, Sepik valley and Torare River. Ireland Province, Papua New Guinea (Fig. 1), a small green stone...Matisoo-Smith Ae Aegirine Aegirine Augite J 8016 Omphacite S- DEI Ec g Augite a d e i t e 5019...Papua Indonesia, of Wichmann (Visser, 2004), omphacite from eclogite samples 8016 (a line), 5019 (dashed
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Journal (article/letter/editorial)
(Burma) can be divided into the Western province and the Eastern province, separated by the Sagaing fault (Fig...The Western province is also named as the Burma microplate, whereas the Eastern province is part of the...onshore along the western margin of the Western province (the Burma microplate) marks the presently active...subduction system (Mitchell, 1993). The Eastern province of Myanmar is composed of the Paleozoic Mogok...prominent metamorphic belts within the Western province (Fig. 1). These three metamorphic belts, from
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Journal (article/letter/editorial)
jadeitite has been reported in other localities such as Cuba (e.g., Cárdenas–Párraga et al., 2012), Myanmar (e...based on the presence of large amphibole laths in omphacite–bearing jadeitite. The details of the hydrothermal...can see a sample composed of serpentinite and omphacite jadeitite in the Fossa Magna Museum (Fig. 3)...Morishita et al., 2007). Jadeitite rarely contains omphacite, phlogopite, edenitic pargasite, titanite, rutile...jadeitite. zircon, pectolite, and prehnite. Omphacite occurs as patches of fine–grained aggregates, and
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Journal (article/letter/editorial)
intergrows replacing omphacite D inclusions in garnet II, and relict omphacite (XJd45) included in edenitic-pargasitic...epidote, and phengite (Fig. 3a-d) ± diopside, ± omphacite, ± glaucophane, actinolite, ± chloritoid and ±...inclusions (+ albite) within garnet mantles (Fig. 3a). Omphacite can be rarely observed as relics within hornblende...(Alm48Prp4Grs43Sps4). CE P Clinopyroxene with omphacite compositions (XJd31-XJd45, Mg# = 0.64-0.76) is...aegirine molecule is minor (Aeg0-Aeg10) (Table A.1). Omphacite was not observed enclosed in garnet grains in
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Journal (article/letter/editorial)
from the Motagua fault zone in Guatemala through Cuba SC RI PT towards the Dominican Republic (García-Gasco...was reached at ca. 70 Ma. Various garnet- and omphacite-bearing blueschist blocks show clockwise P-T-t...filling of veins in combination with carbonates. Omphacite often constitutes either cores in or overgrowths...abundant in the matrix-quartz-free rock suite, omphacite, epidote-group minerals, and calcite. Extensive...and accessory minerals are albite, phengite, omphacite, glaucophane, and titanite. The second matrix-quartz-free
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Journal (article/letter/editorial)
and Sierra de Salinas schists of southern California were underplated beneath the southern Sierra Nevada...temperatures and partial melting in San Emigdio and Sierra de Salinas schists, inverted metamorphism in the...high-temperature Pelona, Orocopia, Rand, San Emigdio and Sierra de Salinas schist (collectively referred to as...schist was underplated directly beneath the southern Sierra Nevada batholith (SNB) and the once contiguous...conjugate massif to the Shatsky Rise, a large igneous province (LIP) 2000 km south-east of Japan (Saleeby, 2003;
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