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| | Journal (article/letter/editorial) | | An antimonian idocrase from the Bau mining district, Sarawak, Malaysia A ROCK specimen, K.I32, containing... Wolfenden, Geological Survey, Borneo Region, Malaysia. The specimen was collected from an ore-body that...the finer-grained aggregates. Trace amounts of grossular were identified only in rock crushed for mineral...indices of antimonian idocrase from the Bau mining district, Sarawak SiO~ TiO2 A12Os Fe~Oa FeO MnO MgO LifO...also thank the Director, Geological Survey of Malaysia and the Director, Institute of Geological Sciences | 👁 Image
| | Catalog/List | | to li" $3. 50 and $5. 00.
nUORITE
GARNET - GROSSULAR Asbestos, Quebec, Canada
Brilliant lustrous apple-green...½x¼"to ¼x¼"$2. 00.
SARABAUITE Sarabau mine, Sarawak, Malaysia.
Select rich red intergrown veins and masses...¼x¾"to½" $2. 50 and $3. 50.
STIBNITE Bau, Province of Sarawak, Malaysia.
Superb silvery-gray metallic elongated | 👁 Image
| | Report (issue) | | Clad), and
probably middle-Tertiary in West Sarawak, Malaysia (Bau) according to
Wolfenden (1965). Several...abundant sulfide(s)
and (or) magnetite. Some deposits (Bau) show lateral gradation and
subsequent replacement...wollastonite, diopside-hedenbergite, and finally grossular-andradite with
or without retrograde tremolit...flooded with
colloform-banded quartz and jasperoid (Bau) all distal to quartz-and
calcite-flooded, calc-silicate...The-distinctive low-silver gold of Indonesia and east
Malaysia, in Foster, R.P., Gold '82: The geology, geochemistry | 👁 Image
| | Journal (article/letter/editorial) | | rodingite is mainly composed of vesuvianite, grossular andradite series garnet, diopside,
and chlorite...vein rodingite also belongs to the andradite–grossular series, and
scarcely contains uvarovite and morimotoite...composition of garnet. (A) Grossular-andradite-uvarovite series. (B) Grossular-andradite-morimotoite series...Rodingite is mainly composed of vesuvianite, grossular
-
-
-
Rodingite with Ti and Cr rich vesuvianite...An antimonian idocrase from the Bau mining
district, Sarawak, Malaysia. Mineralogical Magazine, 38,
894-896 | 👁 Image
| | Journal (article/letter/editorial) | | of vesuvianite is closely related to that of grossular garnet (Warren
and Modell, 1931; Coda et al.,... with Mg, Fe, Ti, and other elements.
Unlike grossular, vesuvianite has a distinct chain of sites of...Vesuvianite
171
Discussion
Vesuvianite Types
A division of vesuvianite into types based on color and thus...Considering the extensive solid solution between grossular and members of the
pyralspite garnet group (see...charge balance, and the antimonian vesuvianite from
Malaysia reported by Bradshaw (1972), which contains 14 | 👁 Image
| | Report (issue) | | minerals typically include garnet (andradite-grossular),
pyroxene (diopside-hedenbergite), wollastonite...million tonne, 10.45 g/t Au), and the deposit at Bau,
Malaysia (2.4 million tonnes), however, contain more...Cu-Mo mineralization at depth, and the deposit at Bau,
Indonesia, that includes a large component of sedimenthosted...Colorado), and probably middle
Tertiary in West Sarawak, Malaysia (Bau), according to
Wolfenden (1965). Several...in Au-bearing skarn
include garnet (andradite-grossular), pyroxenes (diopsidehedenbergite), wollastonite | 👁 Image
| | Journal (article/letter/editorial) | | goldmanite margin (grey) to a F-bearing
vanadian grossular core (dark grey)
1946). An X-ray-diffraction...vesuvianite is a skarn from the Bau
mining district, Sarawak, Malaysia (15.7 wt. % Sb203;
Bradshaw 1972)...fine-grained ( < 30 ~tm)
and is close to the grossular c o m p o n e n t in composition
with variable...o m p o n ent) occurs a r o u n d a V-bearing grossular core (Fig. 2h;
Table 4). This V-rich margin is...respective presence of V- a n d Cr-rich
muscovite. This division is also manifested by o t h e r transition metals | 👁 Image
| Beddoe-Stephens, B., Shepherd, T. J., Bowles, J. F. W., Brook, M. (1987) Gold mineralization and skarn development near Muara Sipongi, West Sumatra, Indonesia. Economic Geology, 82 (7) 1732-1749 doi:10.2113/gsecongeo.82.7.1732 | Journal (article/letter/editorial) | | The skarnsrange from andradite-diopsiderocksto grossular-idocrase-wollastonite-diopside rockswhich formed...
3.031
3.001
2.984
Mole percent
Andradite
Grossular
22.9
73.8
37.4
60.4
23.4
72.0
Pyrope
0.9...51.6
42.9
52.5
0.9
Mole percent
Andradite
Grossular
Pyrope
1.7
1.1
1.3
2.2
0.0
3.1
1.9
1...to 1.2 percentTiO2. Patchyformationofwollas- grossular
tonitc was noted in this skarn.
showextensivequartz...Figure 8. Garnetcompositions
complete
range
from
grossular
to
andraditewith
skarnsfollowing a west-northwest-east-southeast | 👁 Image
| | Catalog/List | | matrix with some massive stibnite. (Sarabau Mine, Bau, Sarawak,Borneo)
2x2 £18
5. BRAZILIANITE single translucent...Australia ,brown micros on about 5mm £7.50
20. GROSSULAR GARNET a 1.5cm single greenish-brown crystal with | 👁 Image
| | Catalog/List | | shaYp
masse0
on green
U.S.AJ
cFystals
C:214
GROSSULAR single
two common crystal
1.Jit:h
look
si 1...Mapimi 1 mexico)
f5
(Kusa
silvery
Mine,
Bau,
Sarawak
in
3/4
x3/4
lK
octahedral
Borneo)
ins...(Buxton
brown
91
GROSSULAR GARNET pinkish
3xl.Sins
(Jeffery
Mine,
92
GROSSULAR
crude
Sweden)
f.2
...
3/4ins
Quartz
long
f.6
ch~ome
across.
Grossular
(Vastro
t5
| 👁 Image
| | Journal (article/letter/editorial) | | proportions as
follows: spessartine (48 to 55 mol %), grossular (25 to 35 mol %), andradite (7 to 13 mol %) and...of oxic sea water (e.g.,
Elderfield et al., 1981; Bau et al., 1996).
The cerium responsible for the positive...due to conditions
of low fluid/rock ratios (e.g., Bau, 1993). In particular,
the preservation of sedimentary...Gd/Gd* and Pr/Pr* were calculated as
defined in Bau and Dulski (1996).
157
SOUTH AFRICAN JOURNAL OF...0
9.8
12.5
11.1
9.7
7.2
9.6
7.9
7.5
grossular
34.6
25.4
29.8
26.2
29.4
31.9
34.9
32 | 👁 Image
| Xiao, Xin, Zhou, Tao-fa, White, Noel C., Zhang, Le-jun, Fan, Yu, Wang, Fang-yue, Chen, Xue-feng (2018) The formation and trace elements of garnet in the skarn zone from the Xinqiao Cu-S-Fe-Au deposit, Tongling ore district, Anhui Province, Eastern China. Lithos, 302. 467-479 doi:10.1016/j.lithos.2018.01.023 | Journal (article/letter/editorial) | | the garnet from skarn zone in Xinqiao deposit.
Grossular
(Adr20-44Grs56-80)
mostly
occurs
in
endoskarn...mainly controlled in the endoskarn garnet
SC
(grossular) and the proximal exoskarn (Al-rich andradite)...a grandite solid solution, which consists of
grossular (Ca3Al2Si3O12) and andradite (Ca3Fe2Si3O12) endmember...content, and andradite has a higher ∑REE
than grossular (Fig. 9). This is not the YAG-type substitution...relaxation energy for Eu2+ entering the Ca-site in grossular is
AC
lower than for the trivalent REEs (Van | 👁 Image
| | Journal (article/letter/editorial) | | Al-rich (pyrope, almandine, spessartine, and grossular) and little is known about garnets with a more...suggest preferential incorporation of HREE in grossular and LREE in more andraditic
compositions.
Variations...summarizing Crown Jewel garnet compositions. Grs-grossular; Adr-andradite; Pyralspite (pyrope + almandine...show that garnets from
the SWOZ belong to the grossular–andradite (grandite)
solid solution ranging in...0
Uvarovite
0.0
0.0
0.0
0.1
0.0
n.a.
n.a.
0.0
Grossular
41.3
47.7
36.2
56.6
36.2
1.3
45.9
0.0
Andradite | 👁 Image
| Tsikouras, Basilios, Karipi, Sofia, Rigopoulos, Ioannis, Perraki, Maria, Pomonis, Panagiotis, Hatzipanagiotou, Konstantin (2009) Geochemical processes and petrogenetic evolution of rodingite dykes in the ophiolite complex of Othrys (Central Greece) Lithos, 113 (3) 540-554 doi:10.1016/j.lithos.2009.06.013 | Journal (article/letter/editorial) | | School of Mining & Metallurgical Engineering, Division of Geosciences, Heroon Politechniou 9, GR-157...protoliths.
Their mineral assemblages commonly include grossular, hydrogrossular, andradite, epidote, prehnite...full occupancy. The
analysed garnets are mainly grossular with minor amounts of
andradite component (Table...comprise intermediate compositions between the
grossular (Ca3Al2(SiO4)3)–hydrogrossular (Ca3Al2(O4H4)3)...and pure silicate garnet (hydrogrossular and grossular, respectively). Moreover, in addition to Ca, the | 👁 Image
| | Journal (article/letter/editorial) | | andradite–uvarovite (Adr81–96Uv3–18) or
andradite–grossular (Adr92–94Grs6–8) solid solution, with the sole...composition
varying from pure andradite to almost pure grossular (Adr11Grs89). All the samples have a low abundance...patterns with a small positive Eu anomaly, and (iii) grossular-rich
samples are LREE-depleted with no Eu anomaly...end-members (pyrope, almandine, spessartine
and grossular), whereas relatively little attention has
been...Ca-rich garnet in which Fe3+ is replaced by
Al (grossular) and Cr3+ (uvarovite).
In this paper, we present | 👁 Image
| | Journal (article/letter/editorial) | | tremolite-actinolite,
titanite,
prehnite,pumpellyite,allanite,grossular
garnet,antimonian
vesuvianite,
andarmenite,occur...tensionareshownin Table3B. Calciteiscommonlya wak, Malaysia(Bradshaw,
1972). Althougha minor
major and,locally...prehnite-, epidote-,vesuvianite-,pumpellyite-,and grossular
garnet-bearing
in the formerandtremolite-phlogopite-dominant...antimonianvesuvianitefrom the Bau
particularly the Archcan gold skarn deposits miningdistrict,Sarawak,Malaysia:Mineralog | 👁 Image
| Zhai, De-Gao, Liu, Jia-Jun, Zhang, Hong-Yu, Wang, Jian-Ping, Su, Li, Yang, Xi-An, Wu, Sheng-Hua (2014) Origin of oscillatory zoned garnets from the Xieertala Fe–Zn skarn deposit, northern China: In situ LA–ICP-MS evidence. Lithos, 190. 279-291 doi:10.1016/j.lithos.2013.12.017 | Journal (article/letter/editorial) | | phenomenon in grandite (grossular Ca3Al2Si3O12–andradite Ca3Fe2Si3O12)
garnets and grossular (Ca3Al2Si3O12)–almandine...garnets
(e.g., pyrope, almandine, spessartine and grossular) and less is
known about garnets with a more andraditic...concentrations of oscillatory
zoning patterns in andradite–grossular garnets from the Xieertala
Fe–Zn skarn deposit...analyses show that garnets from the deposit
form a grossular–andradite (grandite) solid solution and are rich...dominated by andradite and there are also some grossular and minor pyralspite (sum of pyrope, spessartine | 👁 Image
| | Journal (article/letter/editorial) | | zoisite and minor diopside and titanite);
(ii) grossular-rich rodingites (with the assemblage hydrogrossular...phase composition and not that of the parent rock (Bau 1991; Gillis et al. 1992). Fluid phases
rich in CO2...¯uid phase. The occurrence of vesuvianite
and grossular-andradite garnet is also indicative of the involvement...such a case basic conditions would be required (Bau 1991). Therefore, the variation of
REE in the rodingite...rodingitization is marked by the appearance of prehnite and grossular/hydrogrossular and may be
described by the reactions | 👁 Image
| Pomonis, P., Tsikouras, B., Karipi, S., Hatzipanagiotou, K. (2008) RODINGITE FORMATION IN ULTRAMAFIC ROCKS FROM THE KOZIAKAS OPHIOLITE, WESTERN THESSALY, GREECE: CONDITIONS OF METASOMATIC ALTERATION, GEOCHEMICAL EXCHANGES AND T-X(CO2) EVOLUTIONARY PATH. The Canadian Mineralogist, 46 (3) 569-581 doi:10.3749/canmin.46.3.569 | Journal (article/letter/editorial) | | compositional range
between grossular and andradite end-members with
the grossular component ranging from...(Hatzipanagiotou et
al. 2003), are also shown. Symbols: Grs: grossular, Adr:
andradite, Chl: chlorite, Czo: clinozoisite...the
area defined by the three-phase assemblage grossular
– chlorite – diopside and are similar in composition...zoisite and minor diopside and titanite),
(ii) grossular-rich rodingites (with the assemblage
hydrogrossular...the fluid phase and not that of the
parent rock (Bau 1991, Gillis et al. 1992). Fluorine
and CO2-rich | 👁 Image
| | Journal (article/letter/editorial) | | garnet
breakdown. Garnets have high-pyrope and low-grossular/-spessartine components. Fe/(Fe+Mg) profiles across...rich in sillimanite
inclusions commonly show grossular contents up to three
times higher than the cores...100 s count
time with a 2 lm spot. The derived grossular content and Fe/
(Fe+Mg) are given in Table 2....(lm) from the edge of the garnet, Fe/(Fe+Mg) and grossular content
(formula units) respectively (complete...the rock, requiring a
fluid transport mechanism.
Bau (1996) has proposed that ratios of pairs of elements | 👁 Image
| | Journal (article/letter/editorial) | | Al-rich (e.g., pyrope, almandine,
spessartine and grossular) and little attention was paid to the Fe-rich...show that the Xinqiao garnets were formed from grossular –
andradite solid solution and range from pure...contains nearly
equal amount of andradite and grossular (i.e., grandite), the Grt2 cores and (gray) rims...metamorphism. The Xinqiao garnets
are formed from grossular-andradite solid solution and have low MnO (0.19...from the Xinqiao stratiform orebody (Zhang, 2015). Bau and Dulski (1996)
considered that neither partial | 👁 Image
| Ranjbar, S., Tabatabaei Manesh, S. M., Mackizadeh, M. A., Tabatabaei, S. H., Parfenova, O. V. (2016) Geochemistry of major and rare earth elements in garnet of the Kal-e Kafi skarn, Anarak Area, Central Iran: Constraints on processes in a hydrothermal system. Geochemistry International, 54 (5) 423-438 doi:10.1134/s0016702916050098 | Journal (article/letter/editorial) | | 2015; in final form, September 24, 2015 Abstract—Grossular-andradite (grandite) garnets, precipitated from...skarn-type ore deposits (Clechenko and Walley, 2003). Grossular-Andradite (grandite) garnets with oscillatory...All the studied garnets are dominated by the grossular-andradite solid solution with only minor amounts...can be roughly described as a binary mixture of grossular (Ca3Al2Si3O12) and andradite (Ca3Fe2Si3O12) with...andradite mole % and a corresponding variation of grossular from 0.00 to 30.43. There is a significant relationship | 👁 Image
| | Journal (article/letter/editorial) | | 2113/gscanmin.45.5.1115
Th-, U- AND LREE-BEARING GROSSULAR, CHROMIAN FERRIALLANITE-(Ce)
AND CHROMIAN CERITE-(Ce)...exists in whole-rock samples. Among the minerals, grossular (Th + U: 0.10–3.97 wt.%, SLREE: 4.40–7.80
wt.%)...fineto medium-grained texture. The crystals of grossular
are idiomorphic, most being about 0.5 cm in diameter...around the
grossular crystals. The samples of skarn show variable
proportions of pyroxene, grossular and plagioclase...basis of variable proportions of clinopyroxene, grossular and plagioclase, skarn samples display a wide | 👁 Image
| | Journal (article/letter/editorial) | | crystals in the MDR are
frequently zoned where grossular is the most prominent molecule
while andradite... CaO, FeO t and MgO. They contain significant
grossular components (up to 99%) with variable substitutions...suggesting that the analysed crystals belong to the
grossular–hydrogrossular series.
MDR
GDR
DDR
Magnesiohornblende...its restricted appearance) and the formation of grossular after diopside and calcite in the MDR. The initial...hydrogrossular is explained by desilicification of grossular and partial
substitution of SiO4−4 by OH −, as | 👁 Image
| Lajoinie, M.F., Lanfranchini, M.E., Recio, C., Sial, A.N., Cingolani, C.A., Ballivián Justiniano, C.A., Etcheverry, R.O. (2019) The Lomagundi-Jatuli carbon isotopic event recorded in the marble of the Tandilia System basement, Río de la Plata Craton, Argentina. Precambrian Research, 326. 447-461 doi:10.1016/j.precamres.2018.03.012 | Journal (article/letter/editorial) | | crystallisation of a wollastonite-vesuvianite-grossular-diopside skarn generated by the leucogranite intrusions...calcitic marble, and a wollastonite-vesuvianite-grossular-diopside skarn (Lajoinie, 2015) (Fig. 4). Also...paragenesis,
consisting
of
wollastonite + vesuvianite + grossular + diopside, developed in each contact marble-leucogranite...leucosome
intrusions. (d) Wollastonite-vesuvianite-grossular-diopside skarn. Mineral abbreviations according...anomalies between 1.53 and 2.97 (Eu/Eu∗ according to Bau and Dulski, 1996)
and truly negative Ce anomalies |
|
