 | | Journal (article/letter/editorial) | | Barndoor diabase intrusions, north-central Connecticut RICHARD L. KROLL Department of Earth and Planetary...ABSTRACT The Barndoor diabase in north-central Connecticut cuts the N e w Haven Arkose, the oldest formation...the N e w a r k G r o u p of Triassic age in Connecticut. T h e intrusions are dikes in part and slightly...typical diabases, with unusual features such as pigeonite with semispherical fractures and pale-green pyroxene...basalt flows in the N e w a r k G r o u p in Connecticut, and indicate contemporaneity of intrusive and |  | | Journal (article/letter/editorial) | | tellurides is noteworthy. PIGEONITE FROM THE TRIASSIC TRAPS OF THE CONNECTICUT VALLEY Josnln L. Grr,rsoN...Technology In the diabase from West Rock, New Haven, Connecticut, specimen 106 of the Educational Series of rocks...this white augite was of wide occurrencein the Connecticut valley. In describing the rock at New Haven he...occurrence of more than one pyroxene in the Connecticut River traps. The same mineral was found by the...These properties are so close to those given for pigeonite by Larsen5 that without a chemical analysis it |  | | Journal (article/letter/editorial) | | feeder dike in the Mesozoic Hartford Basin, Connecticut Received: 3 October 1997 / Accepted: 5 May 1998...Hartford, Pomperaug, and Deer®eld basins of Connecticut and Massachusetts indicate an original ¯ow volume...The ¯ow consisted largely of a liquid at the pigeonite reaction point. Dike compositions can be modeled...Department of Geology and Geophysics, University of Connecticut, Storrs, CT 06269, U.S.A. e-mail: philpotts@geol...¯ood-basalts in the Hartford Mesozoic basin of Connecticut, was fed by the Buttress dike, which, as a result |  | | Journal (article/letter/editorial) | | Institute ol Materials Science, Uniuersityof Connecticut,Storrs,Ccnnecticut06268 Abstract Hydrofluoric...to produce striking contrastsbetweengrains of pigeonite,augite, and orthopyroxenewhen observed in reflectedlight...them to contain approximate (001) lamellae of pigeonite (Fig. 1A). The augite contains no lamellae of...clinopyroxene which forms either the typical "inverted pigeonite" texture or a more graphic intergrowth referred...material is augite and some is pigeonite. In addition, both the augite and pigeonite contain approximate (001) |  | | Journal (article/letter/editorial) | | GEOLOGY AND GEOPHYSICS, UNIVERSITY OF CONNECTICUT, STORRS, CT 06269, USA Where the Holyokeflood-basaltflowin...1993; Wheelock & Marsh, 1994). Similar Basin in Connecticut is thick and contains coarse-grained, hori-sheets...contains many segregation sheets, in the Basin of Connecticut has allowed where in the flow the segregation...flood Mesozoic Hartford basalt; tholeiitie; Connecticut us to identify from INTRODUCTION The central...Flood-Basalt Flow in the Mesozoic Hartford Basin, Connecticut JOURNAL OF PETROLOGY VOLUME S7 environment |  | | Journal (article/letter/editorial) | | clinopyroxene (C2/c) and Ca-poor clinopyroxene or pigeonite {Pljc) at room temperature, but probably Cllc...temperatures (cf. Brown et al., 1972). Iron-free pigeonite (Yang & Foster, 1972; Kushiro, 1972; Yang, 1973)...correct. At 30 kb No Ca-poor clinopyroxene (Fe-free pigeonite) was found in the join En-Di (Mori & Green, 1976)...Di cpx hosfx Hd Makrirrakhi cpx lamellae Connecticut Cape Vogel opx PPX En Fs FIG. 10. Plots of...sources are: Cape Vogel—Dallwitz et al. (1966), Connecticut—PhQlpotts & Gray (1974), and Makrirrakhi, Greece—Menzies |  | | Journal (article/letter/editorial) | | University of Hawai‘i, Manoa, Honolulu, Hawai‘i 96822, USA 2Department of Physical Sciences, Kingsborough Community...Community College, Brooklyn, New York 11235, USA *Corresponding author. E-mail: dionysos@higp.hawaii.edu...abundance of maskelynite (increasing from A to B) and pigeonite/ maskelynite (decreasing from A to B), and a gradational...magnesian and ferroan pigeonite appear and thicken into B) across the contact. A pigeonite phenocryst-bearing...shergottites, like the basaltic shergottites, consist of pigeonite, augite, and maskelynite (shocked plagioclase) |  | | Journal (article/letter/editorial) | | Iwtitute of Materials Science, Uniuersityof Connecticut,Storrs,Connecticut06268 Abstract The morphology...chilled margins of a diabase dike in eastern Connecticut indicates that this mineral crystallized with...developed in the (100) anO (i00) sectors of the Connecticut bronzite. Their development may be related to...from Route 9, 6.5 miles south of Middletown, Connecticut. The internal optical features and the morphology...the monoclinic crystals of synthetic iron-free pigeonite recently described by is best Yang and Foster |  | | Journal (article/letter/editorial) | | new ferrosilite and Fe-pigeonite occurrence in the Reading Prong, New Jersey, USA Davis A. Young and John...Environmental Studies, Calvin College, GrandRapids, M149546, USA (Received April 6, 1993; revised and accepted July...1993) LITHOS ABSTRACT Ferrosilite and Fe-rich pigeonite have been discovered as discrete grains and as...terranes, pyroxenes such as ferrosilite or Fe-rich pigeonite are much less abundant (Lindsley and Munoz, 1969)...have established that ferrosilite a n d / o r Fe-pigeonite coexisting with fayalite, quartz and hedenbergite |  | | Journal (article/letter/editorial) | | 1975 in Metamorphic Lamellae Orientation of Pigeonite Exsolution Augite:Correlation with Composition...these are orthopyroxene lamellae on (1@), and pigeonite lamellae, termed "0Ot" and "l00", oriented on...lattice parameters of host and one or both sets of pigeonite lamellae. Compositional control of lamellae orientation...were indeed pigeonite' with phaseboundaries,separatinglamel'The definitions of pigeonite and augite used...the work of Ross, Huebner, and Dowty (1973). Pigeonite is defined as a monoclinic pyroxene containing |  | Philpotts, Anthony R., Brustman, Caroline M., Shi, Jianyang, Carlson, William D., Denison, Cambria (1999) Plagioclase-chain networks in slowly cooled basaltic magma. American Mineralogist, 84 (11) 1819-1829 doi:10.2138/am-1999-11-1209 | Journal (article/letter/editorial) | | Geology and Geophysics, University of Connecticut, Storrs, Connecticut 06269, U.S.A. High-Resolution X-ray...interior of the thick Holyoke flood-basalt flow of Connecticut linked to form monomineralic chains at an early...0003-004X/99/1112–1819$05.00 Holyoke flood basalt of Connecticut (Philpotts and Carroll 1996) indicated that this...phenocrysts in a groundmass of plagioclase, augite, and pigeonite, with a mesostasis of magnetite and granophyre...crystals are present, but these react out to form pigeonite in the flow’s interior. A previous experimental |  | | Journal (article/letter/editorial) | | A Checklist Minerals of Connecticut Although perhaps best known for its garnet, chalcocite, and tourmaline...tourmaline, Connecticut also boasts many other mineral species. BRUCEJARNOT R O . B o x 627 M a r t i n...e , N e w J e r s e y 08836 T he study of Connecticut minerals has enjoyed a long peri od of attention...reviews of this mineral list. Dr. Bruce Jarnot, a Connecticut native, has avidly collected both minerals and...collections of Connecticut gems and minerals in existence. 386 R O C K S & MINERALS Two Connecticut localities |  | | Journal (article/letter/editorial) | | pigeonitefrom diabase, West Rock, New Haven, Connecticut. Solid circles:observed points; open circles:deduced...structure is present, as is commonly the casewith pigeonite in dolerites, the position of (001) can be observed...824 In order to obtain the composition of the pigeonite under consideration it is of course still necessaryto...twinned crystal of pigeonite in diabase from West Rock, New lfaven, Conn., in which pigeonite is associated |  | Veksler, I. V., Dorfman, A. M., Borisov, A. A., Wirth, R., Dingwell, D. B. (2008) Liquid Immiscibility and Evolution of Basaltic Magma: Reply to S. A. Morse, A. R. McBirney and A. R. Philpotts. Journal of Petrology, 49 (12) 2177-2186 doi:10.1093/petrology/egn064 | Journal (article/letter/editorial) | | olivine^pigeonite peritectic point; TD, thermal divide. Phases: opx, orthopyroxene; pig, pigeonite; qz,...become quartz-normative at the stage of olivine^pigeonite peritectic reaction (the lower part of the Skaergaard...Fig. 1) is positioned between the olivine and pigeonite fields, deep inside the region of quartz-normative...the Thingmuli volcano, Iceland and the Cascades, USA (Carmichael, 1964). Dotted curve T & C and open circles...Philpotts, large tholeiitic lava flows in Connecticut (USA) have become the best studied examples of |  | | Journal (article/letter/editorial) | | Materials Science, University of Connecticut, Storrs, CT 06268, USA Abstract. Immiscible liquids, preserved... Northern Ireland (30076); F South Britain, Connecticut (reflected light; 65301); G Keweenawan, Ontario...tholeiitic basalts of the Triassic-Jurassic basins of Connecticut (Philpotts 1979), the author began a systematic...the teaching collection at the University of Connecticut, samples with which the author was extremely...America Triassic-Jurassic age basalt, Southbury, Connecticut. See Table 2, No. 15. (Philpotts 1979) 65301 |  | | Journal (article/letter/editorial) | | tellurides is noteworthy. PIGEONITE FROM THE TRIASSIC TRAPS OF THE CONNECTICUT VALLEY Josnln L. Grr,rsoN...Technology In the diabase from West Rock, New Haven, Connecticut, specimen 106 of the Educational Series of rocks |  | | Journal (article/letter/editorial) | | (1993) OMereoritical Society, 1993. Printed in the USA. Catalogs and Inventories The Meteoritical Bulletin...New, P. 0. Box 278, Anacortes, Washington 98221, USA. See also Wlotzka et al., 1993. Denman 002 0"36'S...New, P. 0. Box 278, Anacortes, Washington 98221, USA. See also Davis and Petersen (1992). Frontier Mountain...1200 W. Algonquin Road, Palatine, Illinois 60067, USA. Main mass, Robert R. Brooks, Dept. of Soil Sciences...2"17'28"N, 88"37'32"W McHenry County, Illinois, USA Found 1991 September Ordinary chondrite (L6) One |  | | Journal (article/letter/editorial) | | mesostasis. Distinct pigeonite grains, pigeonitic exsolution lamellae in augite and pigeonite rimming augite...Fe-rich and Si-rich glasses. Si-rich glass in the Connecticut tholeiite is chemically similar to the rhyolites...2.82 O. 1 5 and comparative data. Model Connecticut Tholeiite 5 Rhyolite 4 Si-Glass Pe-Olass Rock...analysis for tholeiitio' basalt from Southbury Connecticut (Philpotts, 1982). Major Total Fe a s 314...these values. The pyroxenes coexist with minor pigeonite and give temperatures ranging from 1150~ to below |  | | Journal (article/letter/editorial) | | (1993) 0 Meteoritical Society, 1993. Printed in USA Preterrestrial aqueous alteration of the Lafayette...77058, USA *Lockheed Engineering and Sciences Co., Johnson Space Center, Houston, Texas 77058, USA 3Present...Engineering and Sciences Co., Houston, Texas 77058, USA (Received 1992 September 16; accepted in revised...cedures; average analyses of olivine, augite, pigeonite, and plagioclase some or all of the secondary...material (mesostasis) consisting of plagioclase, pigeonite, alkali feldspar, Ti-magnetite, ilmenite, pyrite |  | | Journal (article/letter/editorial) | | Relation of Hlpersthene with Oriented Plates to Pigeonite B. Relation of Hr'oersthene to Hr,'oersthene rvith...following quotation sums up Barth's conclusions: "Pigeonite is the most abundant pyroxene of volcanic rocks...molecularratio is lessthan 45: 55, onepyroxene(pigeonite) becomesa stable phase.Where the ratio exceeds45:55...stated. In the efiusive stage Kuno believesthat pigeonite will form metastably because of rapid crystallizationas...composition is in the two pyroxene field or the pigeonite field. Wageranil Deer (1939) Wager and Deer in |  | | Report (issue) | | THE MOUNT CARMEL AND SOUTHIJOTON QUADRAM3LES, CONNECTICUT by Crawford E. Fritts New data concerning the...approximately 111-square miles in south-central Connecticut were obtained in the course of detailed geologic...rocks of pre-Triassic age, New Haven County, Connecticut oo.....«..».o.»».....o (Pocket) 2. ^ Analyses...Triassic (or younger) age, New Haven County, Connecticut ...... (Pocket) 3. Stability of minerals in...the Mount Carmel and Southington quadrangles, Connecticut . (Pocket) 4. Approximate equivalence of metasedlmentary |  | | Journal (article/letter/editorial) | | 90095–1567, USA of Geology and Geophysics, Yale University, New Haven, Connecticut 06520–8109, USA *Corresponding... 137 © Meteoritical Society, 2004. Printed in USA. 138 P. H. Warren et al. Its pyroxenes, in particular...partitioning is slightly smaller for augite than for pigeonite. Nonetheless, it does stand in contrast to the...anal.; CPig7, av. 7 VS core pigeonite anal.; CPig3, av. 3 VS core pigeonite anal.; FeSG12, av. 12 VS anal...94201, for example, the earliest pyroxenes were pigeonite only (McSween et al. 1996; Mikouchi 2001). Also |  | | Journal (article/letter/editorial) | | This article was downloaded by: [University of Connecticut] On: 12 October 2014, At: 00:37 Publisher: Taylor... 67700 Mexico Downloaded by [University of Connecticut] at 00:37 12 October 2014 Abstract Alkaline...AND HOST MAGMAS Downloaded by [University of Connecticut] at 00:37 12 October 2014 Introduction THE STUDY...platform (Ortega Downloaded by [University of Connecticut] at 00:37 12 October 2014 1262 TREVIÑO-CÁZARES...Belt. Peridotitic xenolith localities: (a) Southern USA (Luhr and Aranda-Gómez, 1997): I = Joshua Tree; II |  | | Report (issue) | | increasing volume. Subsequent pulses of ENA basalt in Connecticut are described by Philpotts as rising through...shifting extension. One of the feeder dikes in Connecticut that fed the initial ENA magma pulse (the Higinum...Studies Program, Wesleyan University, Middletown, Connecticut 06459 ABSTRACT Complex swarms of mafic dikes...relatively few, but large, ENA dolerite dikes in Connecticut and Massachusetts, which apparently were feeders...remnants of flood basalts now preserved in the Connecticut Valley (Philpotts and Martello, 1986). The majority |  | | Journal (article/letter/editorial) | | The augite contains ex solution lamellae of pigeonite on (00l), and typically exhibits simple contact...diabase inasmuch as they contain lamellae of pigeonite parallel to (001). These crystals are enclosed...continuity with cores of pigeonite-augite intergrowths derived from the diabase. The pigeonite-augite intergrowths...the University of Connecticut for discussion of his experimental results on Connecticut Valley diabase. |
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