1-20 OF 166 RESULTS FOR

grossular

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 April 2020
American Mineralogist (2020) 105 (4): 468–478.
...Charles A. Geiger; George R. Rossman Abstract The nominally anhydrous, calcium-silicate garnets, grossular (Ca 3 Al 2 Si 3 O 12 ), andradite (Ca 3 Fe 2 3 + Si 3 O 12 ), schorlomite (Ca 3 Ti 2 4 + [Si, Fe 2 3 + ]O 12 ), and their solid solutions can incorporate structural OH - , often termed “water...
FIGURES | View All (5)
Journal Article
Published: 01 April 2020
American Mineralogist (2020) 105 (4): 455–467.
...Charles A. Geiger; George R. Rossman Abstract The calcium-silicate garnets, grossular (Ca 3 Al 2 Si 3 O 12 ), andradite (Ca 3 Fe 2 3 + Si 3 O 12 ), and their solid solutions [Ca 3 (Al x , Fe 1 − x 3 + ) 2 Si 3 O 12 ], can incorporate various amounts of structural OH – . This has important...
FIGURES | View All (12)
Journal Article
Published: 01 October 2019
American Mineralogist (2019) 104 (10): 1455–1468.
...Xianghui Fei; Zhaochong Zhang; Zhiguo Cheng; M. Santosh Abstract The grossular-andradite solid solutions in garnet from skarn deposits in relation to hydrothermal processes and physicochemical conditions of ore formation remain controversial. Here we investigate garnet occurring in association...
FIGURES | View All (8)
Journal Article
Published: 01 September 2019
American Mineralogist (2019) 104 (9): 1246–1255.
... SiO 4 ], and the garnet series, grossular-andradite [Ca 3 (Al x , Fe 1 − x 3 + ) 2 Si 3 O 12 ], grossular-spessartine [(Ca x , Mn 1 − x 2 + ) 3 Al 2 Si 3 O 12 ], and almandine-spessartine [ ( Fe x 2 + , Mn 1 − x 2 + ) 3 Al 2 Si 3 O 12 ]. Local magnetic behavior of the transition-metal-bearing end...
FIGURES | View All (5)
Journal Article
Journal: Economic Geology
Published: 01 June 2019
Economic Geology (2019) 114 (4): 745–770.
...- or andradite-grossular solid solution (Ad 68- Ad 72 )–stable assemblages representative of calcic alteration typically occur in deep and/or distal positions but are less commonly exposed. The sodic-calcic and sodic alteration types, however, occur more proximally to the porphyry orebody. Sodic-calcic...
FIGURES | View All (10)
Journal Article
Journal: Economic Geology
Published: 01 May 2019
Economic Geology (2019) 114 (3): 513–540.
... as pyrope (prp = 100*Mg/[Mg + Fe + Mn + Ca]), almandine (alm = 100*Fe/[Mg + Fe + Mn + Ca]), grossular (grs = 100*Ca/[Mg + Fe + Mn + Ca]), and spessartine (sps = 100*Mn/[Mg + Fe + Mn + Ca]) members. Titanium, which occurs in some mantle-derived garnet pyroxenites in eastern New Zealand ( Reay et al., 2002...
FIGURES | View All (12)
Journal Article
Published: 01 May 2019
European Journal of Mineralogy (2019) 31 (3): 453–463.
... in the pyrope-rich garnets. Intermediate garnet compositions are more depleted in HREE and enriched in LREE (Ce, Nd, and Sm). Finally, Ca-rich garnets (50% grossular component) are depleted in LREE and HREE, but are enriched in MREE. Hence, the X site dimension does exert a crucial role in REE incorporation...
FIGURES | View All (13)
Journal Article
Published: 01 May 2019
European Journal of Mineralogy (2019) 31 (3): 443–451.
...Edgar Dachs; Charles A. Geiger The thermodynamic behaviour of three synthetic, Ca 3 (Al 0.25 Fe 0.75 3 + ) 2 Si 3 O 12 , Ca 3 (Al 0.50 Fe 0.50 3 + ) 2 Si 3 O 12 and Ca 3 (Al 0.75 Fe 0.25 3 + ) 2 Si 3 O 12 and three grossular-rich natural solid-solution garnets were investigated. Synthetic garnets...
FIGURES | View All (5)
Journal Article
Published: 01 April 2019
Russ. Geol. Geophys. (2019) 60 (4): 386–399.
... and gehlenite (±rankinite, bredigite); T ≥ 750 °C (spurrite); T ≥ 700 °C (tilleyite, wollastonite, and melilite (Gehl <50 )); and ~500–550 °C (diopside, amphibole, and grossular). Very high temperatures at the contact ( T cont > 2/3 T melt ) result from magma flow along a conduit. The temperature profiles...
FIGURES | View All (7)
Journal Article
Published: 01 December 2018
American Mineralogist (2018) 103 (12): 1918–1924.
...Chi Ma; John R. Beckett Abstract Nuwaite (Ni 6 GeS 2 , IMA 2013-018) and butianite (Ni 6 SnS 2 , IMA 2016-028) are two new chalcogenide minerals, occurring as micrometer-sized crystals with grossular, Na-bearing melilite, heazlewoodite, and Ge-bearing Ni-Fe alloys in veins and as mono-mineralic...
FIGURES
Journal Article
Published: 01 July 2018
European Journal of Mineralogy (2018) 30 (4): 681–694.
... property behavior. Three issues are: i) Could there be differences in the thermodynamic properties, namely heat capacity, C p , between synthetic and natural andradite crystals, as observed in the Ca-garnet grossular, Ca 3 Al 2 Si 3 O 12 ? ii) What is the thermal nature of the low-temperature magnetic...
FIGURES | View All (8)
Journal Article
Published: 30 January 2018
The Canadian Mineralogist (2018) 56 (1): 15–37.
... and volcaniclastic sediments in response to Oligo-Miocene intrusion by granitoid porphyries. The KSD contains abundant oscillatory-zoned garnet crystals, which are characterized by isotropic cores of nearly pure andradite that are rimmed by anisotropic grossular–andradite (grandite). The Fe-rich andraditic cores...
FIGURES | View All (5)
Journal Article
Published: 01 November 2017
American Mineralogist (2017) 102 (11): 2307–2316.
... is weaker in our previous study of pyrope-rich solutions (i.e., Py 80 Gr 20 , Du et al. 2016 ) because excess volume varies little from Ca-Ca S3NN pairings in pyrope-rich solutions, whereas Mg-Mg S3NN pairings in grossular-rich solutions studied here are effective at reducing excess volume. Heating to 600...
FIGURES | View All (10)
Journal Article
Published: 01 September 2017
The Canadian Mineralogist (2017) 55 (5): 845–865.
... Antarctica, Pakistan, and Madagascar, but is more abundant in Tanzania and Kenya. The gem-quality green vanadium-rich grossular is only mined in southern Madagascar (Vohibory), south-eastern Tanzania (Ruangwa and Tunduru, Fig. 1 a), north-eastern Tanzania (Lelatema fold belt and Kalalani), and south-eastern...
FIGURES | View All (11)
Journal Article
Published: 01 July 2017
The Canadian Mineralogist (2017) 55 (4): 763–786.
... November 2016 20 May 2017 © 2017 Mineralogical Association of Canada 2017 Neoproterozoic Metamorphic Mozambique Belt tsavorite tanzanite Sm/Nd dating Sr-O-S-isotopes fluid inclusion origin of the fluids World-famous deposits of both vanadium-bearing green grossular garnet...
FIGURES | View All (10)
Journal Article
Journal: Geology
Published: 01 May 2017
Geology (2017) 45 (5): 471–474.
.... We report on understated but widespread mineral assemblages present in the DTZ at the top of a mantle diapir (Oman ophiolite), including pargasite, grossular, and pyroxenes of peculiar composition. These minerals are present interstitially between olivines and as inclusions in the disseminated...
FIGURES | View All (4)
Journal Article
Published: 01 April 2017
American Mineralogist (2017) 102 (4): 851–859.
... single crystals of grossular garnet (Ca 3 Al 2 Si 3 O 12 ) has been studied in situ as a function of pressure and temperature separately. The same data collection protocol has been adopted to collect both the pressure-volume ( P-V ) and temperature-volume ( T-V ) data sets to make the measurements...
FIGURES | View All (5)
Journal Article
Published: 01 March 2017
The Canadian Mineralogist (2017) 55 (2): 333–347.
... of two distinct skarn zones: a proximal andradite skarn and a distal grossular-diopside-vesuvianite skarn, where the latter formed in the first stage of metasomatic reaction and was later overprinted by an oxidized, Fe,Sn-enriched fluid that formed the andradite skarn. The paragenetic sequence...
FIGURES | View All (11)
Journal Article
Published: 28 February 2017
European Journal of Mineralogy (2017) 29 (5): 821–837.
... be divided into two groups. Group I rodingite, where prehnite is absent, consists of the subgroups clinozoisite rodingite, garnet–diopside rodingite and garnet–vesuvianite rodingite. The grossular-rich (hydro) garnet may contain up to 13.7 wt% TiO 2 , essentially as morimotoite component (23 mol%). In group...
FIGURES | View All (8)
Journal Article
Published: 01 January 2017
American Mineralogist (2017) 102 (1): 173–183.
... temperature and pressure, suggesting a significant role for these two parameters in determining Ti solubility. However, a continuous increase in VI Ti with increasing grossular content also suggests that the Ca content of the garnet plays a critical role. Wavelength-dispersive X-ray maps for Ti, Fe...
FIGURES | View All (13)