1-20 OF 64 RESULTS FOR

harrisite

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: 22 July 2016
Journal of the Geological Society (2016) 173 (6): 916-932.
... by skeletal to dendritic olivines (harrisites) was observed near the contact with host gabbros. Spinels from the olivine-rich troctolites locally include Ti-pargasite to kaersutite frequently associated with phlogopite to Na-phlogopite. Spinel-hosted amphibole displays rare earth element (REE) patterns...
FIGURES | View All (14)
Image
Photograph of a zone showing olivine with <b>harrisite</b> heterogeneous morpholog...
Published: 22 July 2016
Fig. 2. Photograph of a zone showing olivine with harrisite heterogeneous morphology. Coarse-grained domains including olivine with tabular to skeletal and dendritic morphology (ellipse) are associated with medium-grained domains characterized by granular olivines. The coarse-grained domain
Image
( a ) Photograph of pegmatoid <b>harrisite</b> MA11. Thin-section photographs: ( b...
Published: 22 July 2016
Fig. 3. ( a ) Photograph of pegmatoid harrisite MA11. Thin-section photographs: ( b ) pegmatoid harrisite MA11; ( c ) harrisite MA10; ( d ) olivine-rich troctolite MA5.
Journal Article
Journal: Economic Geology
Published: 01 October 1981
Economic Geology (1981) 76 (6): 1480-1502.
... of olivine in the ultramafic sequence shows that the sequence is made up of a series of thin flow units with gravity or flow-differentiated olivine-rich zones. Between these flows are thicker flows, characterized by massive olivine harrisites, commonly with ocelli structures. Throughout the sequence...
Journal Article
Journal: GSA Bulletin
Published: 01 November 1974
GSA Bulletin (1974) 85 (11): 1721-1726.
...COLIN H. DONALDSON Abstract Skeletal and dendritic olivine crystals in the Archean volcanic ultramafic spinifex rocks and in harrisitic ultramafic layers of the Rhum pluton are classified as (1) plate, (2) randomly oriented, (3) porphyritic, or (4) branching type. Volcanic and plutonic examples...
Image
( a ) <b>Harrisitic</b> structures in peridotite and gabbro of the Western Layered...
Published: 01 August 2014
F ig . 20. ( a ) Harrisitic structures in peridotite and gabbro of the Western Layered Intrusion. Surface showing the weathering out of elongate olivine crystals in typical harrisite for comparison with the smooth surface of the underlying layered peridotite (below hammer). Episodic growth
Image
( a,b ) Successive stages in the formation of <b>harrisitic</b> structures (after ...
Published: 01 August 2014
F ig . 21. ( a,b ) Successive stages in the formation of harrisitic structures (after O'Driscoll et al. , 2007). Harrisitic olivine growth ( a ) is repeatedly interrupted by replenishments to produce both in situ and broken varieties ( b ).
Journal Article
Journal: Economic Geology
Published: 01 July 1985
Economic Geology (1985) 80 (4): 849-871.
... that gave rise to the folding along the basal contact of the complex. A peridotite member of one such sill which has distinctive harrisitic textures originated by crescumulate growth, followed by homogenization of its bladed olivine crystals through subsolidus diffusion at high temperatures. GeoRef...
Journal Article
Published: 01 June 1981
Journal of the Geological Society (1981) 138 (3): 307-326.
.... These represent the 4 main magma influxes which formed the malic phase of the Bushveld Complex and are, in chronological order: 1, a contaminated magnesian basalt (B1) which gave rise to a saucer-shaped laminated marginal zone at the base of the Complex with diverse related sills; 2, a harrisitic peridotite...
Journal Article
Published: 01 March 1976
Canadian Journal of Earth Sciences (1976) 13 (3): 442-450.
... in metamorphic grade from amphibolile fades to granulite facies. Some of the interlocking textures ( i . e . near Hopedale) are interpreted as relict cumulate or harrisitic growths, mimicked by olivine regrowlh during metamorphism and preserved in structurally isotropic enclaves in their host rocks. Others ( e...
Journal Article
Journal: GSA Bulletin
Published: 01 September 1960
GSA Bulletin (1960) 71 (9): 1295-1322.
... in part be due to processes other than those operating under the influence of gravity. The perpendicular feldspar rock of the Skaergaard intrusion and the harrisite structure of layered periodotites from the island of Rhum are cited as products of moderate undercooling of magma in a bivariate condition...
Image
REE and incompatible element compositions of the amphiboles and clinopyroxe...
Published: 22 July 2016
Fig. 8. REE and incompatible element compositions of the amphiboles and clinopyroxenes from harrisites normalized to CI chondrite ( Anders & Ebihara 1982 ). Trace element compositions of interstitial magmatic amphiboles from olivine-bearing gabbros of Tuscany ophiolites (light grey field
Image
Variations of Eu/Eu* (Eu N /(Sm N  × Gd N ) 1/2 ) and Sr/Sr* (Sr N /(Ce N  ...
Published: 22 July 2016
Fig. 11. Variations of Eu/Eu* (Eu N /(Sm N  × Gd N ) 1/2 ) and Sr/Sr* (Sr N /(Ce N  × Nd N ) 1/2 ) v. Y in clinopyroxene from olivine-rich troctolites and harrisites of the Internal Ligurian ophiolites (IL; this work and Renna & Tribuzio 2011 ). The compositions of clinopyroxene from olivine
Image
Occurrence of phosphorus (P) zoning in olivine crystals in gabbros from the...
in > Geology
Published: 01 October 2014
Figure 3. Occurrence of phosphorus (P) zoning in olivine crystals in gabbros from the Mid-Atlantic Ridge (30°N, Atlantis Massif, sample U1309D-247R3–002; see Suhr et al., 2008 ), harrisites from Rum Island (Scotland), and lunar basalts (sample 12002,162). Dotted lines in P maps demarcate
Image
Fig. 3.   (A) Upper mantle harzburgite (HZ) exhibiting pyroxenite (PX) band...
Published: 24 October 2008
Fig. 3. (A) Upper mantle harzburgite (HZ) exhibiting pyroxenite (PX) bands, which could be transposed dykes. (B) Pyroxenite dyke with boninitic geochemical affinities and harrisitic margins crosscutting the mantle harzburgite (HZ). (C) Polymictic debris flow occurring at the base of the Saint
Image
Variations of Eu/Eu* (Eu N /(Sm N  × Gd N ) 1/2 ) and Sr/Sr* (Sr N /(Ce N  ...
Published: 22 July 2016
Fig. 9. Variations of Eu/Eu* (Eu N /(Sm N  × Gd N ) 1/2 ) and Sr/Sr* (Sr N /(Ce N  × Nd N ) 1/2 ) v. Y in amphiboles from olivine-rich troctolites and harrisites. Compositions of interstitial magmatic amphiboles from olivine-bearing gabbros of Tuscany ophiolites ( Tribuzio et al. 2000
Image
Schematic diagram of the crustal petrogenetic scenario proposed for the for...
Published: 22 July 2016
Fig. 14. Schematic diagram of the crustal petrogenetic scenario proposed for the formation of olivine-rich troctolites. (1) Primitive melt intrusion into a gabbroic crystal mush and formation of harrisites from an hybrid undercooled melt. (2) Cooling of the underlying primitive melt or of new
Image
Variations of F and Ce N /Sm N  v. Y in amphiboles from selected olivine-ri...
Published: 22 July 2016
Fig. 7. Variations of F and Ce N /Sm N v. Y in amphiboles from selected olivine-rich troctolites and harrisites. The compositions of (1) spinel-hosted amphiboles from olivine-rich troctolite of the Atlantis Massif (AM; Tamura et al. 2014 ), (2) interstitial magmatic amphibole from olivine
Image
Marginal relationships of the Ultrabasic Intrusion, Layered Suite: ( a,b ) ...
Published: 01 August 2014
F ig . 11. Marginal relationships of the Ultrabasic Intrusion, Layered Suite: ( a,b ) Tongues of harrisitic gabbro in bytownite gabbro (Western Layered Intrusion (WLI)) extending into a heated and ductile granite zone to the left, west of mausoleum, Harris Bay. Hammer for scale is ~30 cm. ( c,d
Journal Article
Journal: Geology
Published: 01 October 2014
Geology (2014) 42 (10): 867-870.
...Figure 3. Occurrence of phosphorus (P) zoning in olivine crystals in gabbros from the Mid-Atlantic Ridge (30°N, Atlantis Massif, sample U1309D-247R3–002; see Suhr et al., 2008 ), harrisites from Rum Island (Scotland), and lunar basalts (sample 12002,162). Dotted lines in P maps demarcate...
FIGURES