 | | Journal (article/letter/editorial) | | FAYALITE AT ROCKPORT, MASSACHUSETTS* Cn,lnrns Pa.racne, H arvard, U niv ersity, Cambri,dge, M assachusetts...and mode of occurrence of fayalite at four Iocalities on Cape Ann, Massachusetts, with a description of...related to a fayalite-bearing nordmarkite granite, older than and intruded by the dominant Rockport granite...granite. Fayalite is not a mineral of common occurrence.ft is true that it has been found as a constituent...come from the local volcanic rocks and the name fayalite was based on their description. However, further |  | Isa, J., Kohl, I.E., Liu, M.-C., Wasson, J.T., Young, E.D., McKeegan, K.D. (2017) Quantification of oxygen isotope SIMS matrix effects in olivine samples: Correlation with sputter rate. Chemical Geology, 458. 14-21 doi:10.1016/j.chemgeo.2017.03.020 | Journal (article/letter/editorial) | | (matrix effect) US ranging up to ~20‰ for pure fayalite (Eiler et al., 1997). With the development of...that varied non-linearly from T forsterite to fayalite, however only a limited number of intermediate...fluorination analysis. Several samples (Day Book dunite, Rockport, and those from the Skaergaard intrusion) were...range from very magnesian (Fa2) to nearly pure fayalite, with 4 samples spanning intermediate compositions...(Fa9) and the Rockport CE end-member (Fa97). All samples are close to the forsterite-fayalite join, with |  | | Report (issue) | | Fe2+ 2 SiO4 Fayalite c 2001 ° Mineral Data Publishing, version 1.2 Crystal Data: Orthorhombic. Point...= 6.0889 Z=4 X-ray Powder Pattern: Rockport, Massachusetts, USA. (ICDD 20-1139). 2.501 (100), 2.828...occurrences of relatively pure material are: in the USA, in the St. Peters Dome area, near Pikes Peak, El...Springs, Inyo Co., California; at Rockport, Essex Co., Massachusetts; from Monroe, Orange Co., New York;... (1975) High temperature crystal chemistry of fayalite. Amer. Mineral., 60, 1092{1097. All rights reserved |  | | Journal (article/letter/editorial) | | pattern consistentwith that of "normal" ferrous fayalite. The peaksdue to ferric iron split independentlyto...vacancies. Introduction "Ferrifayalite", a variety of fayalite containing from about ten to forty weight percent...1976,1982).prior to that time, two discoveriesof fayalite containing ferric iron had been made in the Soviet...the term "ferrifayalite" refersin generalto any fayalite containing severalpercentor more ferric iron,...Samplesfor study included "ferrifayalite"from Qianan County, China, as well as'ferrifayalites"from the more |  | | Journal (article/letter/editorial) | | PETROGRAPHICAL COUNTY, PROVINCE MASS. I. OF ESSEX THE area of igneous rocks in Eastern Massachusetts, especially...especially in Essex county, has been, as the late Geo. H. Williams said, " more discussed than any other...pages are written. I have visited the region of Essex county several times and collected a large number of...of its chief features. The igneous rocks of Essex county extend along the coast from Lynn to the New...Basin, but this paper does not include them. In Essex county they form a long ridge "extending in a northeasterly |  | | Journal (article/letter/editorial) | | Geophysical Laboratory, Washington, D.C. 20008, USA and S.S. H A F N E R The University of Chicago, Department...the Geophysical Sciences, Chicago, Illinois 60637, USA Received 10 December 1971 Revised version received...terrestrial samples include a fayalite from the type locality at Rockport, Massachusetts [5], an olivine separate...olivines. Olivine Rockport, Massachusetts a 12018,35-01 Modoc b B1c S14 d Fayalite molecular % Ca/(Mg+Fe+Ca)...natural samples 12018,35-01, S14 and the Rockport fayalite were made on separated crystals (approximately |  | | Journal (article/letter/editorial) | | WIDESPREAD OCCURRENCE OF FAYALITE IN CERTAIN IGNEOUS ROCKS OF CENTRAL WISCONSIN. IN centralWisconsin...the same structuralrelations. The habitat of the fayalite is in certain phases of the granitesyenite series...Consideredin its entirety, the series in which the fayalite occurs resemblesin many respects,though not in...Christianiaregion of southern Norway, and in Essex County,Mass. The compositionof some of the phases of...causes of the developmentof the ferroussilicate, fayalite, in the magma. 551 SAMUEL WEIDM.4N 552 I II |  | | Journal (article/letter/editorial) | | feldspar group. THE MINERALS OF ROCKPORT. I{. E. MCKINSTRY MASSACHUSETTS Cambrid,ge, Mass. More than...was called to the unusua, mineral occurrences at Rockport, on Cape Ann, by J. P. Cooke's description of...being the type locality for these species, the Rockport quarries have afforded an interesting list of...most unusual of all, lacge tabular crystals of fayalite, normally an utter stranger to granitic rocks...pegmatite masses. Location und, Present Condition.-Rockport is best reaehed via the Boston and Maine R. R |  | | Report (issue) | | Al0:08 )§=8:00 O22 (OH)1:64 : (2) Rockport, Essex Co., Massachusetts, USA; 3+ corresponds to (Fe2+ 6:63 Mn0:30...Magnetite, hematite, hedenbergite, riebeckite, fayalite, garnet, quartz. Distribution: Many localities...From around Michigamme, Marquette Co., Michigan, USA. In Canada, in the Labrador City area, Labrador, |  | | Journal (article/letter/editorial) | | pages 1252–1260, 2001 Ferroanthophyllite in Rockport grunerite: A transmission electron microscopy...twinned, near end-member grunerite from Rockport, Massachusetts. A small percentage of Pnma ferroanthophyllite... formed by replacement of fayalite in granite from Rockport, Massachusetts, is a case in point. It was...However, we did not find protoamphibole in the Rockport sample. For comparison, we also studied a sample...produces twinned crystals 1252 BOZHILOV AND EVANS: ROCKPORT GRUNERITE (Fig. 1b). Starting with the C2/m amphibole |  | | Journal (article/letter/editorial) | | AMERICA AUGUST, 1935 No. 8 GRUNERITE FROM ROCKPORT, MASSACHUSETTS, " AND A SERIES OI- SYNTHETIC FLUOR-AMPHIBOLES...studies of iron silicates we have found the fayalite of Rockport, Mass., a very useful natural material,...the theoretical composition, FerSiO+.The best fayalite from that sourcealways has inclusions of griinerite...hitherto recorded and suggests that, Iike the fayalite, it is very close to the pure ferrous end-member...is fully borne out by the facts. Our first Rockport fayalite contained only a very small amount of disseminatedgriinerite |  | | Journal (article/letter/editorial) | | Minerals of Franklin and Sterling Hill, Sussex County, New Jersey, U.S.G.S. Professional Paper, l8O,...PnrBsrr-BvToururN rrr, Haraard.IJnitersity, Cambrid.ge38,Massachusetts. The writer has recently had the opportunity...described as allanite in a granite from Gloucester, Massachusetts, but the pleochroism and extinction angle of...similar to certain granites of Cape Ann, Massachusetts,in which fayalite and allanite (the latter "very rare")...England area. The rocks of Cape Ann and Peabody, Massachusetts,appear to be about 85 million years older than |  | | Journal (article/letter/editorial) | | segregations consist of small elongate bodies of fayalite granite and porphy'1i1is granite. These igneous...and aplite. Accessoryminerals of the fayalite granite are fayalite, fluorite and allanite. Sill-like bodies...characteristics, support the theory that the Pikes Peak, fayalite granite, Windy Point, and Mount Rosa granites...porphyritic granite, 3) granitic dikes and aplites, 4) fayalite granite, 5) Mount Rosa alkalic granite and its...the North Fork of the South Platte River in Park County) to the Canon City embayment, a distance of about |  | | Journal (article/letter/editorial) | | hydrothermal fayalite in the epicrustal rocks of the Bushveld Igneous Complex FAYALITE (Fa97Fo3) is associated...genetically related to the Bushveld Granite. The fayalite occurs in veins up to 2 m. thick; in hand specimens...agrees well with published data for nearly pure fayalite (Yoder and Sahama, 1957): d130 2"83 A and d174...sample current o.o25~A on brass. Standard, analysed fayalite with SiO2 3o-5 0/0; TiO2 o.I 0/0; FeO 64. 9 %...total IOO.6 %. The 'purest natural fayalite' from Rockport, Massachusetts, contains small 'magnetic' inclusions |  | | Journal (article/letter/editorial) | | five samplesof fayalite previously studied by Mdssbauer spectroscopy.Rockport fayalite is homogeneous...suggesting either a post-crystallization reaction with fayalite and oxygen going to laihunite and hematite or...the Mourne Mountains suggestsexsolution from a fayalite-laihunite solid solution, based on the substitution...images, but these areas cannot correspond to pure fayalite and laihunite exsolution becausethe bulk Fe3./EFeof...workers believed that ferrifayalite was a mixture of fayalite, hematite, and olivine from mantle kimberlite |  | | Journal (article/letter/editorial) | | TOPOGRAPHICAL NORTH AMERICA Canada Nain, Labrador: fayalite, 730 Tulameen complex, British Columbia; forsterite...and Trooper Lake, Glamorgan Township, Halliburton County: nepheline, 114 Munro mine: chrysotfle, 467 QUEBEC...forsterite, 730 United States Amelia County, Virginia: albite, 581 Bedford County, Virginia: chevkinite, perrierite...Brewster, New York: clinochlore, 404 Chester, Massachusetts: corundophilite, septeamesite, 404 Chester,...chevkinite, 42 Dona Ana County, New Mexico: aphrosiderite, 404 Eldorado County, Colorado: rhodophyL lite |  | | Journal (article/letter/editorial) | | eight olivines ranging in composition from Foeoto fayalite. For Fos6 the Mg/Fe ratio in the exsolved pyroxene...Skaergaardintrusion and a pure fayalite (RPT) from Rockport, Massachusetts,were also examined. The specimens(Fig...Another slightly different type is found in the Rockport fayalite in which orientation relationships do not...light. (a[d) Bushveld, (e) Rhum (199) and (f) Rockport. 142 MOSELEY: SYMPLECTIC EXSOLUTION IN OLIVINE...Bushveld, (b) and (c) Skaergaard(4472)and (f) Rockport. MOSELEY: SYMPLECTIC EXSOLUTION IN OLIVINE |  | | Report (volume) | | Geology of Selected Quadrangles In Massachusetts GEOLOGICAL SURVEY This volume was printed as separate...quadrangle, Worcester and Franklin Counties, Massachusetts, by Donald F. Eschman. (D) Geology of the Taunton...quadrangle, Bristol and Plymouth Counties, Massachusetts, by Joseph H. Hartshorn. o ; Bedrock Geology...Vicinity Massachusetts > w By PRIESTLEY TOULMIN 3d GEOLOGY OF SELECTED QUADRANGLES IN MASSACHUSETTS ~s -GEOLOGICAL...1163-A Prepared in cooperation with the i Massachusetts Department of Public Works « UNITED STATES |  | | Journal (article/letter/editorial) | | PETROGRAPHICAL MASS. GENERAL SIONS. V. PROVINCE OF ESSEX CO., DISCUSSION AND CONCLU- Analytical methods...Table I are given my analyses of the rocks of Essex county, with one by Dr. Eakle, and in Table II It is...line-syenites, PETROGRAPHICAL PROVINCE OF ESSEX COUNTY 465 and nordmarkite, the tinguaite, s6lvsbergite... HENRY S. WASHINGTON purely ferrous olivine, fayalite' in the granite, and the presence of the MgO-free...1894, and III, PETROGRAPHICAL PROVINCE OF ESSEX COUNTY 467 It will be seen that in what are obviously |  | | Journal (article/letter/editorial) | | hypersthene, garnet, and to a much lesserextent, fayalite. The form, struclure and mineral associations...containing layers locally rich in hedenbergite and fayalite. These rocks are interbedded with recrystallized...cummingtonile or dannemorite' The grunerite from Rockport, Mass. (Table 2, No. 5) consists of almost pure...Grunerite from Rockport, Massachusetts (6, p. 545). 6. Grunerite from Cummington, Massachusetts (7). 7. Grunerite...and they have calculated the composition of the Rockport grunerite, etc., in terms of the two moleIt may |  | | Journal (article/letter/editorial) | | (1996) 0 Meteoritical Society, 1996. Printed in USA. The search for exsolved ferromagnesian olivines:...Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA Author's e-mail address: mpetaev@mars...terrestrial rocks (San Carlos forsterite and Rockport fayalite) were studied by optical microscopy and high-precision...terrestrial San Carlos forsterite (2 grains) and Rockport fayalite (1 grain). Among meteorites, pallasites and...50 0 10 20 30 40 50 60 70 80 90 I00 Fayalite, mole % FIG. 1. Solvus in the Fa-Fo system calculated |  | | Journal (article/letter/editorial) | | feldspar group. THE MINERALS OF ROCKPORT. I{. E. MCKINSTRY MASSACHUSETTS Cambrid,ge, Mass. More than...was called to the unusua, mineral occurrences at Rockport, on Cape Ann, by J. P. Cooke's description of...being the type locality for these species, the Rockport quarries have afforded an interesting list of...most unusual of all, lacge tabular crystals of fayalite, normally an utter stranger to granitic rocks |  | Hua, Xin, Huss, Gary R., Tachibana, Shogo, Sharp, Thomas G. (2005) Oxygen, silicon, and Mn-Cr isotopes of fayalite in the Kaba oxidized CV3 chondrite: Constraints for its formation history. Geochimica et Cosmochimica Acta, 69 (5) 1333-1348 doi:10.1016/j.gca.2004.08.015 | Journal (article/letter/editorial) | | 2005 Copyright © 2005 Elsevier Ltd Printed in the USA. All rights reserved 0016-7037/05 $30.00 ⫹ .00 doi:10...08.015 Oxygen, silicon, and Mn-Cr isotopes of fayalite in the Kaba oxidized CV3 chondrite: Constraints...Arizona State University, Tempe, AZ 85287-1404, USA Department of Mechanical and Aerospace Engineering...85287-6106, USA 3 Center for Meteorite Studies, Arizona State University, Tempe, AZ 85287-1404, USA (Received...2004) Abstract—The iron-rich olivine end-member, fayalite, occurs in the matrix, chondrules, Ca-Al-rich |  | Doyle, Patricia M., Jogo, Kaori, Nagashima, Kazuhide, Huss, Gary R., Krot, Alexander N. (2016) Mn–Cr relative sensitivity factor in ferromagnesian olivines defined for SIMS measurements with a Cameca ims-1280 ion microprobe: Implications for dating secondary fayalite. Geochimica et Cosmochimica Acta, 174. 102-121 doi:10.1016/j.gca.2015.10.010 | Journal (article/letter/editorial) | | microprobe: Implications for dating secondary fayalite Patricia M. Doyle a,b,⇑, Kaori Jogo a,b,1, Kazuhide...University of Hawai‘i at Manoa, Honolulu, HI 96822, USA NASA Astrobiology Institute, Institute for Astronomy...Drive, University of Hawai‘i, Honolulu, HI 96822, USA Received 19 January 2015; accepted in revised form...enables aqueously formed secondary minerals such as fayalite and various carbonates in ordinary and carbonaceous...situ measurements of Mn–Cr isotope systematics in fayalite by secondary ion mass spectrometry (SIMS) require |  | | Journal (article/letter/editorial) | | solid solution between forsterite, Mg2SiO4, a n d fayalite, F%SiO4. It is an orthosilicate (i.e. it contains...r e d olivines containing 1 I, 34, a n d 53 % fayalite b y X - r a y p o w d e r diffraction and infra-red...infra-red spectroscopy. His results for the 53 % fayalite specimen m a y be briefly s u m m a r i z e d...the oxidation of powdered olivines, including fayalite, using differential thermal analysis and X-ray...and single-crystal samples of composition 2o % fayalite. In the powdered samples forsterite and hematite |
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