 | | Journal (article/letter/editorial) | | minerals Article The Secondary Minerals from the Pillow Basalt of Salsette-Mumbai, Deccan Volcanic Province... R.; Benkó, Z. The Secondary Minerals from the Pillow Basalt of Salsette-Mumbai, Deccan Volcanic Province...consists of tholeiitic basaltic flows with pillows, pillow breccia, and hyaloclastite, which formed in contact...hyaloclastite breccia of the interpillow matrix and in the pillow cavities. The highly permeable hyaloclastite breccia...phase and at higher temperatures. In contrast, the pillow cavities were a temporally closed system and contained |  | | Journal (article/letter/editorial) | | Microscopic details. Development of chloritoid. Chlorite-mica phyllites. Volcanic series. Intrusive " greenstones...Cornwall is not far to seek. Commencing with the Lower Devonian of sheet 335, there is noticeable everywhere...enormous folds broken across by faults and thrusts. In quarry sections inland there is often developed a kind...designation was apparently chosen as a convenient group-name, and would not be adhered to in a revised map...desirable. The Volcanic Series are highly sheared lavas now usually found as dark green or purple schists |  | | Report (chapter) | | studies are limited and used mainly empirical chlorite geothermometry in the BGB sequence regionally...formations of the c. 3530–3298 Ma Onverwacht Group. Chlorite thermodynamic modelling indicates metamorphic...metamorphic conditions of between 281 and 301°C, lower than in previous studies. Raman thermometry on a...Formation. Application and critical evaluation of chlorite thermodynamic modelling results confirm the presence...inverted metamorphic field gradient beneath a fuchsite–chlorite– quartz shear zone in the c. 3334 Ma Kromberg |  | | Journal (article/letter/editorial) | | of the Gutkovaite subgroup of the Labuntsovite group Named after Aleksey Sergeyevich Sakharov (1910–1996)...of the Chinle Formation, Temple Mountain, Emery County, Utah, U.S.A. Cooper, M.A. et al. (2003): Can....of Skeleton Mountain, along Lake Greeson, Pike County, Arkansas, U.S.A. Roberts, A.C. et al. (2003):...Triassic age in the Temple Mountain region, Emery County, Utah. Schindler, M. et al. (2003): Can. Mineral...in veins in an altered diorite, New Cliffe Hill quarry, Stanton-upon-Bardon, Leicestershire, U.K. Hawthorne |  | | Journal (article/letter/editorial) | | investigations were carried out by an international working group of 66 earth scientists under the IGCP Project "Ophiolites"...trachybasaltic to shoshonitic) composition. The lower part of the island arc slope contains typical tholeiitic...these rocks are amygdaloidal, highly magnesian lavas (similar to boninites), which have not been recognized...Philippine Sea Floor" by the InternationalWorking Group on the IGCP Project "Ophiolites" [ 16 ]. According... basalt basalt pillow basalt pillow basalt ?pillow basalt ?pillow basalt basalt pillow basalt pilotaxitic |  | | Journal (article/letter/editorial) | | and Moss Agatefiom the Del Norte Area, Saguache County, Colorado” and appeared in the July/August 2003...Mountain having been recently acquired by Jefferson County Open Space, a governmental agency that emphasizes...the IabIe M0 U nt a inS near Golden, Jefferson County, Colorado Downloaded by [University of Kentucky...softer sedimentary rocks that compose the steep lower slopes of the mesas. Ralston dike, elevated about...Hays Limestone Member Kb Benton Shale Kd Dakota Group Jm Morrison Formation Jrc Ralston Creek Formation |  | | Journal (article/letter/editorial) | | Robertson and Varnavas, 1993 ): (a) the Othris Group (Permian-Cretaceous) consisting of rift-related...Anavra Chert and Neohori Formations). This group includes a pillow lava and chert unit (Agrilia and Neraida...break-up of the Othris ocean. Locally, the Othris Group unconformably overlies a metamorphic basement of...older age, the Pteleon Formation. (b) the Mirna Group (Triassic-Jurassic) consisting of ocean-floor peridotites...extensive pillow lava unit (Sipetorrema Pillow Lava) and minor sheeted dykes. (c) the Dinai Group (Cretaceous-Tertiary) |  | | Book | | milky quartz stems. Denny Mountain area of King County. Specimen from the collection of Cary A. Maykut...DESCRIPTIONS 21 ABBREVIATIONS 24 GLOSSARY 25 COUNTY INDEX OF MINERAL OCCURRENCES 29 MINERAL DESCRIPTIONS...(using a code explained on page 21) and a county by county list mentioning the nature of their occurrence...Parks and Monuments prohibit all collecting. state, county and city parks usually prohibit collecting. Please...sphenc, ilmenite, anatase, tourmaline, zircon, chlorite, magnetite, pyrite, chalcopyrite,allanite Rarely: |  | | | | MUSEUM Ag ates Treasures of the Earth Essex County Council Many libraries in Essex have compact discs...produces them. Ardownie Quarry agates derive their name from Ardownie Quarry in Scotland, and M.F. Heddle...filling within gas cavities and veins in certain lavas or as a replacement mineral within some sedimentary...claystones. It is most commonly found within volcanic lavas, in particular andesites, some rhyolites and tholeiitic...surrounding rock by the eruption. All these varieties of lavas are very poor in free silicon dioxide, and the fact |  | | Book | | Treasures of the Earth ~ ~ ~ Essex County Council Many libraries in Essex have compact discs and cassettes...BY THE NATURAL HISTORY MUSEUM , LONDON Essex County Council Libraries First published by the Natural...produces them . Ardownie Quarry agates derive the ir name from Ardownie Quarry in Scotland, and M.F. Heddle...filling within gas cavities and veins in certain lavas or as a replacement mineral within some sed imentary...claystones. It is most commonly found within volcanic lavas. in particular andesites, some rhyolites and tholeiitic |  | | Journal (issue) | | Farringdon Sponge Beds, held on a hot April day! A group was taken to the Southwick Tunnel workings. It was...Palaeozoic to Recent, belonging as it does to a group (Pleurotomaraciea) that has remained faithful to...substantial spring rises from the Upper Greensand/Lower Chalk where the water table is brought to the surface...produced in 1 870, so is no longer in competition with quarry operators and masons, might have something to do...complex shows its ocean floor origins by masses of pillow lava which skirt the dykes. The Serpentite, a form |  | | Journal (article/letter/editorial) | | micaceous phyllosilicates, kaolinite-, smectite-group minerals and the composition of glauconite are observed...taken as an equivalent. Some ferroan saponite and chlorite represent the basic branch of the bimodal rift...multifunction display. Corrensite and mixed-layer chlorite-corrensite are not only in altered basic magmatic...impacts. The glauconite-kaolinite-illite-smectite-chlorite assemblages are efficient tools for the depositional...alluvial fan. Chromium muscovite, Cr smectite, and Cr chlorite formed at the brink from hypogene to supergene |  | | Report (issue) | | and W. A. Watters DSIR Geology and Geophysics, Lower Hutt Regretfully, an incorrect initial for Mr Railton...title page. His initials should be G.T., not G.L. Lower Hutt, New Zealand 1990 I I Beach sand, alluvium...may be unfamiliar with chemistry, an Survey) in Lower Hutt. They may also be consulted explanation of...various stages of the draft, and PO Box 30-368, Lower Hutt. J.G. Gregory for his advice and encouragement...(Photo: Wendy St George). Figure9 Arfvedsonite. Group ofcrystalswithin cavity in peralkaline rhyolite |  | | Journal (article/letter/editorial) | | movement apart of the caldera's and its filling with lavas began. The beginning of the "caldera" vulcanism...complex, with an age of 12-7 Ka. Eruption of these lavas led to depletion of the magma chamber, collapse...there were traces of montmorillonite, illite and chlorite. A single sample was found to contain equal amounts...These laminae were deposited at 7-5 Ka. On the lower part of the slopes of the seamount, at sts. 1484...section they are also cinnamon-colored, but in the lower part they are greenish gray. The finely dispersed |  | | Book | | ....243 APPENDIX II: MINERAL SPECIES LISTED BY COUNTY ...............................248 ABOUT THE AUTHORS...geographically: the Northern (Upper) and the Southern (Lower) Peninsulas, which, to a considerable degree, are...of volcanism (at least four) produced basaltic lavas and pyroclastic rocks, accompanied by dikes of diabase...MISSISSIPPIAN □ DEVONIAN SILURIAN ORDOVICIAN □ CAMBRIAN ■ LOWER PROTEROZIC 0 MIDDLE PROTEAOZIC ARCHEAN Figur...deposits of the Keweenaw, while occurring in basaltic lavas and associated rocks, were deposited in those rocks |  | | Journal (article/letter/editorial) | | microbial metabolism [41,42]. These characteristics can lower activation-energy and thus invoke nucleation of...Mössbauer Spectroscopy data from Pacific Ocean pillow basalt and two anoxic fractured granite cores from...bacterial precipitates, which are characterized by a lower Si concentration, smaller grain size, and frequently...have a reduced expansion ability compared with lower Fe smectites [56]. The association and interaction...of the smectite group, formed around microbial cells and their EPS within pillow lavas from the North |  | | Journal (article/letter/editorial) | | textures and primary minerals are different, chlorite evolved at similar rates in coeval metabasites...phyllosilicates and increase in thicknesses of chlorite and mite crystallites. The principal difference...difference is in the type of interstratification in chlorite, with berthierine in metapelites, and smectite (saponite)...number of mineral species with increasing grade, chlorite, sensu stricto, being the only trioctabedral mineral...the same end-member, thermodynamically stable chlorite, as well as texture (crystal size), and where |  | | Book (edition) | | petrographic description of each important rock-group includes, or is followed by, an account of the distribution...for one group of rocks that are much to the fore at the present time (the Central African lavas), something...FELSIC MINERALS Feldspars; Feldspathoids; Silica Group Ill ACCESSORY AND SECONDARY MINERALS 97 The Normal...Contamination; Zeolites; Epidote Group; Chlorite, Serpentine Group; the Carbonates; Talc Part II: Modes...EXTRUSIVE IGNEOUS ROCKS 131 The Eruption of Lavas; Structures of Lavas II MODES OF OCCURRENCE OF INTRUSIVE |  | | Book | | (Fe,Mg,Zn)3-4 LOCALITIES AND ASSOCIATIONS GROUP INTRODUCTIONS Shows important rock or mineral localities...introductory page describing the parameters of the group, as well as any further sub-groups. is often associated...lazuli. Lazurite is a member of the feldspathoid group. It is always deep or vibrant blue, and it was once...representative specimens show the diversity within the group. SECTION SHOWN bladed crystals rich blue colour...Some silicate minerals also inlude an additional group classification. CRYSTAL SYSTEM: the crystal system |  | | Journal (article/letter/editorial) | | intensively altered volcanic rocks. Besides talc, chlorite, carbonates and tremolite that occur in variable...restricted to certain parts of the sulphide body (upper, lower or the keel zone)? Also, are there any distinct...intercalated banded tuff and chert beds. The Abu Hamamid group includes two distinct cycles of volcanism. Each...N.D. 132 000 tons Abandoned Talc occurs in the lower levels off the sulphide body 13 200 tons Abandoned...below surface Pockets of massive sulphide in the lower levels of the talc mine A lens of sulphide mineralization |  | | Journal (article/letter/editorial) | | characteristic mineral assemblage is serpentine + chlorite + hematite + pyrite (magnetite–hematite buffer);...Arg—aragonite, Atg—antigorite, Brc—brucite, Chl—chlorite, Ctl— chrysotile, Di—diopside, Dol—dolomite, Fa—fayalite...serpentine + brucite + chlorite + actinolite + magnetite, serpentinite + talc + chlorite + actinolite + magnetite...magnetite + pyrite, and serpentine + talc + chlorite + pyrite + hematite + anhydrite. At contact with the...model for the hydrothermal transformation of the lower part of the oceanic crust was proposed in (McCollom |  | | Journal (issue) | | Three Articles The Tonopah-Belmont mine, Maricopa County, A rizona by G. B. Allen & W. Hunt 139 James...aerially extensive Osborn Ag-Au district of Maricopa County in west-central Arizona. The primary property in...Linarite crystals, 1 mm. F igure 7. Vanadinite crystal group, 3.5 mm, with descloizite. F igure 8. Rosasite sphere...the water table and limited accessibility of the lower workings have prevented determi nation of a definitive...of widespread volcanism and block tilting. The lower age is constrained by radiometric determinations |  | | Book | | older mining pictures from the collections of the County Museum, Truro. ln supplying material fro1n the...to innumerable questions, the curators. of the County Mu~eu1n. Leslie Douch and Roger Penhallurick, have...The tops of the granite masses get progressively lower towards the west. DartEdwards, 1985. The region...74). continued beyond the Devonian. During· the Lower Carboniferous, the dominant sediments were mudstones...sediments accumulated in these Devonian sented by lavas, tuffs, and agglomerates, such as those at coastal |  | | Book | | most probably relates 10 such eve111s. Ba al1ic lavas aro.: common in Wales. many of Ordovician age but...cornpO\ed of plagioclase feldspar and clinopyroxene. Lavas of the Rhobell Figure 5. Thin ,ection of parga...sion of Oxford Univer·i1y Pre~s. "idc (grey) rn: Group. 'ho1ograph 1986). by Volcanic Complex. expo ed...cornpo ition of the magma p. : tal 10 the Rhobell lavas. Ba alt in the Fi hguard are..... , pillowed as...molybdenite (Bromley. 1964: Roben . 1979). Rhyolitic lavas (Fig. 8) and high-level rhyolitic intrusion are |  | | Book (volume) | | stalleites), PyhHsalmi, and Vihanti] is a separate group. These deposits show enough differences in geologic...in alphabetical order. The only two deposits in Poland worthy o f separate treatment are so diverse in...Scotland 3 7 1 Wales Norway Sweden 1 7 17 Finland Poland USSR 12 2 30. These 80 do not include the four...to 15 January meeting in London of the Contact Group "Geology of Ore Deposits held at the Institute of...Sass-Gustkiewicz were of the greatest assistance in Poland. Again, as I have stated in the two previous volumes |
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