 | | Report (chapter) | | Permian magmatism of the Iberian Chain, Central Spain, and its relationship to extensional tectonics M... G I L - I M A Z 2 1Departamento de Ciencias de la Tierra, Area de Petrologia y Geoquimica, Universidad...50.009 Zaragoza, Spain (e-mail: mlago@posta.unizar.es) 2Departamento de Ciencias de la Tierra, Area de...009 Zaragoza, Spain Abstract: Late Variscan magmatism in the Iberian Chain (Central Spain) is recorded...hypabyssal intrusions. Earlier amphibole-rich andesite, rich in crustal xenoliths (metapelite, granitoid |  | | Journal (article/letter/editorial) | | careful search for many miles revealed no granite outcrops up the valley from the moraine. A glance at Hague's...shows that in his mapping he located no granite outcrops in Sunlight valley within the area of that quadrangle...relative scarcity of andesite, although not far above the moraine in question the andesite walls of the basin...conglomerate. Very little andesite occurs in the moraine, though the andesite walls close in completely...search up creek from the moraine to where the andesite covers all the older rocks shows no exposures |  | | Journal (article/letter/editorial) | | 1991 Petrology and geochemistry of the Huerto Andesite, San Juan volcanic field, Colorado Daniel R.R... 1990 Abstract. The Huerto Andesite is the largest of several andesite sequences interlayered with...volcanic field, Colorado. Stratigraphically this andesite is between the region's largest tuff (the 27.8...present in the more mafic, SiO2-poor samples of andesite, hence the parent magma was most likely a mantle-derived...inferred Oligocene destructive margin, the Huerto Andesite is similar to typical plate-margin andesites: |  | | Report (volume) | | (see appendixes for geologic time scale) basalt, andesite, dacite, rhyolite, and lahar deposits. South of...volcanic rocks which probably originally consisted of andesite, dacite, and lahar deposits. Identified Mineral...mercury, and antimony. Host rocks consist mostly of andesite. The mineralization is similar to that at bulk-tonnage...sampling, collection of gravity data, and inspecting outcrops for mineralization. The geology of the study area...rocks (Tertiary) Consists of dacite and rhyolite Andesite and lahar deposits (Tertiary) Basalt (Tertiary) |  | | Report (volume) | | Peaks Andesite of Central Colorado GEOLOGICAL SURVEY BULLETIN 1405-F The Buffalo Peaks Andesite of Central...restudy and adoption of a formal name for the andesite that was the subject of Bulletin 1 of the U.S...Publication Data Sanders, George F. The Buffalo Peaks Andesite of central Colorado. (Contributions to stratigraphy)...Supt.ofDocs.no.: I 19.3:1405-F 1. Andesite Colorado Park Co. 2. Andesite Colorado Chaffee Co. 3. AndesiteColorado............... Description of the Buffalo Peaks Andesite.............................................. |  | | Report (issue) | | Porphyritic andesite................................. 7 Altered porphyritic andesite................silicified, and pyritized dacite and possibly andesite. Hematite is present as massive replacements...below. Volcanic rocks . ; Porphyritic andesite Porphyritic andesite containing local andesitic tuff lenses...west of the Eymir mine area (pis. 1 and 2). The andesite is strongly altered, hydrothermally, near the...described separately below. The porphyritic andesite has abundant plagioclase phenocrysts and rare |  | | Journal (article/letter/editorial) | | 9ST 1. INTRODUCTION terised by shattered rock outcrops and a thick cover of in situ frost detritus. A... 307 ALTITUD E O F TH E LAST ICE SH E E T , SW LA K E DISTRICT ..~~. , 8 : ~ 'O ~) ,,-:..-,--...in unglaciated outcrops may be expected to have expanded more than those in outcrops that were eroded...depth measurements were made using a probe on andesite outcrops at each of five high-altitude sites located...plateau above 700 m support numerous icemoulded rock outcrops and perched, glacially-transported boulders (Fig |  | | Book (volume) | | Boulder, Colorado 80301 Cover Photo: Chapter 20. 10 La Caridad Copper Mine, I. Salas, Guillermo P. ...geothermal field, Puebla F. Romero R. . 77 8. La Primavera geothermal field, Jalisco . Saul Vengas...stratigraphic data on the Monterrey Formation outcrops of the San Hilario area, Baja California Sur ...copper deposit, Sonora Guillermo P. Salas 199 . 20. La Caridad disseminated copper deposits, Sonora Guillermo... Contents V 27. Geology and mineralization of the La Encantada Mining District, Coahuila . B. Solano R |  | | Report (volume) | | -.--Early andesite eruption .................... -------------.___._---____ Later andesite eruption ...the early andesite.................. Distribution and characteristics of the later andesite.............---..-.. Mineralization subsequent to the early andesite intrusion.............. Mineralization subsequent...-----.-.--.---.-..-.--. Vein groups of the' early andesite mineralization..--...---.--...-..--..... Occurrence...GEOLOGICAL SURVEY BULLETIN JEarly andesite (lode porphyry) Later andesite Early daoite pro.bably intrusive |  | Carrino, Thais Andressa, Crósta, Alvaro Penteado, Toledo, Catarina Labouré Bemfica, Silva, Adalene Moreira (2015) Unveiling the hydrothermal mineralogy of the Chapi Chiara gold prospect, Peru, through reflectance spectroscopy, geochemical and petrographic data. Ore Geology Reviews, 64. 299-315 doi:10.1016/j.oregeorev.2014.07.012 | Journal (article/letter/editorial) | | times ranging from Paleozoic to Cenozoic PT ED (de la Cruz, 1998). The origin of the mineralization is...Barroso Group was formed. It is characterized by andesite and trachyandesite, in addition to tuffs with...of large proximal alteration, characterized by outcrops of fresh volcanic rocks (e.g., CC-05 and CC-08...characterized in detail and discussed below. Andesite outcrops with a low degree of alteration are visible... 4B). Extensive outcrops of rhyolitic tuff also occur close to porphyritic andesite. These rocks are |  | | Journal (article/letter/editorial) | | com/loi/taje20 Jurassic volcaniclastic – basaltic andesite – dolerite sequence in Tasmania: new age constraints...Meffre (2007) Jurassic volcaniclastic – basaltic andesite – dolerite sequence in Tasmania: new age constraints...(965 – 974) Jurassic volcaniclastic – basaltic andesite – dolerite sequence in Tasmania: new age constraints...Proterozoic populations. Basaltic andesite, hereafter referred to as andesite, caps the volcanilithic units...composition and fluid-immobile traceelement ratios. The andesite is interpreted as an extrusive equivalent of the |  | | Report (issue) | | . . . . . . . . . . • Earlier andesite (hornblende-biotite-andesite).............................. Appearance................ _... . . . . Later andesite (biotite-augite-andesite) .................................... . . . . . . . . . . . . Relation to earlier andesite . . . . . . . . . . . . . . . . . . . . . . .... . . . . . . . . . • Distinction from earlier andesite . __ ............................. . . . . . ...-.-- .. ------.-.----. 83 Veins of the earlier andesite ........ ." . .' .•.•.•...................... |  | | Report (issue) | | ___ Eot Eiol Trachyte, ___ 6 6 6 7 7 7 8 8 Andesite, basalt, and trachyte blocks Gabbro blocks _ ...Gabbro blocks Recrystallized basalt blocks Dikes of andesite and basalt in gabbro 19 12 12 13 13 15 15 Page...boundary of the Pacific basin corresponds to the andesite line _ ______________-_______--_-_--_----___-_-_______________...melilite-nepheline and nepheline basalt, nepheline basanite, andesite, and trachyte. The breccias of central Udot and...fine-grained tuff matrix of crystal and rock fragments. Andesite, trachyte, and basalt blocks predominate in the |  | Humphreys, M. C. S., Edmonds, M., Plail, M., Barclay, J., Parkes, D., Christopher, T. (2013) A new method to quantify the real supply of mafic components to a hybrid andesite. Contributions to Mineralogy and Petrology, 165 (1) 191-215 doi:10.1007/s00410-012-0805-x | Journal (article/letter/editorial) | | the real supply of mafic components to a hybrid andesite M. C. S. Humphreys • M. Edmonds • M. Plail • J...erupting a crystal-rich hornblende-plagioclase andesite with ubiquitous mafic inclusions, indicating mixing...eruption, supplying heat and volatiles to the andesite resident in the magma chamber. As well as producing...involves incorporation of phenocrysts from the andesite into the mafic magma. These inherited phenocrysts... Approximately 25 % of all phenocrysts in the andesite show these textures, indicating very extensive |  | | Report (issue) | | .......................................... 29 Andesite, latite, and their quartzose equivalents ............................................ 81 Late andesite .............................................................. 80 Table 13. Modes of the late andesite volcanic unit ..................................Figure 9. Interbedded flows and tuffs of the early andesite ...........................................31...sill………………… 52 Figure 16. Green vitrophyre dike in andesite ............................................. |  | | Report (issue) | | to the right, on Arizona Highway 69. and meta-andesite that Krieger (1965) assigned Highway crosses...15 miles away, are the northern and westernmost outcrops of Mazatzal Quartzite in the hills near Del Rio...98 1 Metarhyolite Metatuff Metabasalt and meta-andesite 4 C11 � � 0\ � i To Ash Creek \:'....Assemble at the western dump piles near the discovery outcrops for a discussion of the regional geologic setting...Blacet, 19718; DeWitt, 1989) that forms extensive outcrops in the southwestern part of the Prescott area |  | | Journal (article/letter/editorial) | | scanty. Attention has been directed to particular outcrops of serpentine and the Highland Border Series,...suites of rocks, named from the locality of their outcrops the Highland Border Rocks, and consisting of a...short description of the salient features of the outcrops, which are for the most part confined to stream...about a mile to the W.S.W., there are several outcrops of serpentine, with almost vertical strong shear-planes...rock is identical with that from the River Prosen outcrops. Immediately beyond, and high up the east bank |  | Slater, Evan, Hanley, Jacob, Mulja, Thomas, Zentilli, Marcos, Trottier, Corwin (2020) Epithermal Mineralization in the Busang Southeast Zone, Indonesia: New Insight into the Au Prospect at the Center of the Bre-X Fraud. Minerals, 10 (8) 698 doi:10.3390/min10080698 | Journal (article/letter/editorial) | | which the NE-trending basalt-andesite volcanic centers of the basalt-andesite volcanic centers of the ECKVB...placed the Busang field camp the south side of the andesite-basalt plug, locally known as the Busang Hill...Hill. A placer gold mining the south side of the andesite-basalt plug, locally known as the Busang Hill....Busang Busang and its vicinity are dominated by andesite-basalt flows, diorite subvolcanic stocks, tuffs...texture were similar to those of the subsurface andesite porphyry investigated by Farquharson [4] (Figure |  | | Report (issue) | | __________________________ __________________ Andesite on the Nosoko peninsula______________________...---_--------Chemical composition and norms of andesite from Ishigaki-shima, and comparative analyses...boulders, sand or gravel beaches having bedrock outcrops, and sand or gravel beaches backed by limestone...containing some graphite]. The Fu-saki called andesite line is well to the east of the Ryukyus, Formation...greenschist, quartz-mica system. schist, hornfels, meta-andesite, and some marble. STRATIGRAPHY Some metamorphic |  | | Journal (article/letter/editorial) | | Geology, petrology and magma process of Ishikoshi Andesite in northern Miyagi Prefecture, NE Japan 佐藤 石渡...ISHIWATARI)†,‡ Ishikoshi Andesite is the Middle Miocene, amphibolebearing, two pyroxene andesite lava ‰ow located...formed to be composite lava ‰ow with PL. Ishikoshi Andesite has columnar joints rather than platy joints....large phenocryst size have prevented Ishikoshi Andesite from formation of foliation along which platy...joints develop in the lava. Keywords: Ishikoshi Andesite, Tholeiite/calcalkali series, Composite lava |  | | Report (chapter) | | (Mahaney 1990). Still older bedrock and sediment outcrops in the adjoining plains and foothills, discussed...detail by Shackleton (1945) and Baker (1967), outcrops on the south-western slopes of the mountain between...African volcanism. It is the prominent outcrops of trachytic andesite and tephrite lava and their loessic...elsewhere by Baker nearly a half century ago. Thin outcrops of weathered rock (palaeosols; Fig. 3c) are found...tenuous assignment of the lower trachytic andesite outcrops at Mweiga as correlative with the Late Miocene |  | Tran, Hoa Trong, Polyakov, Gleb V., Tran, Anh Tuan, Borisenko, Alexander S., Izokh, Andrey E., Balykin, Pavel A., Ngo, Phuong Thi, Pham, Dung Thi (2016) Intraplate Magmatism and Metallogeny of North Vietnam - Modern Approaches in Solid Earth Sciences No. 11. Springer International Publishing. doi:10.1007/978-3-319-25235-3 | Book | | Paleozoic intracontinental orogenic belt showing outcrops of Precambrian rocks (Tri and Khuc 2011); to the...Besides, according to Lien et al. (2005), meta-andesite outcrops elsewhere along a cross-section toward Hoang...Permian age of these rocks were determined by U-Pb, LA-ICP-MS for zircon (Tri, personal comm.). High-Al...has been kept since. The new isotopic data (U-Pb, LA-ICP-MS, zircon) of rhyolite from Binh Lieu area showed...Tran Van Tri, Pham Binh, Pham Hoe (2005) Meta-andesite in the Bac Ha area, Lao Cai province. 60-Anniversary |  | | Report (volume) | | limestone...................... ~ ""X HI- A, Cleaved andesite, Edmunds Hill; J3, Hobart Hill; massive andes"... Gregory; and Part III, List of localities of outcrops of Paleozoic and igneous rocks in Aroostook County...in ou't-of-way places, where he had discovered outcrops, and we are particularly indebted to him for knowledge...limest. |0nondaga (LucUow) /Silurian. ' IL'Anse a la Veille limestones. ' 12. Southwest Point limestones...hotel, and southward toward Masardis, are several outcrops of limestones, calcareous shales, and sandstones |  | Zeng, Qingdong, Di, Qingyun, Liu, Tiebing, Li, Guangming, Yu, Changming, Shen, Ping, Liu, Hongtao, Ye, Jie (2020) Explorations of gold and lead-zinc deposits using a magnetotelluric method: Case studies in the Tianshan-Xingmeng Orogenic Belt of Northern China. Ore Geology Reviews, 117. 103283 doi:10.1016/j.oregeorev.2019.103283 | Journal (article/letter/editorial) | | Devonian quartz sandstone, siltstone, tuff, 125 andesite porphyry, rhyolite porphyry, and Early-Middle...chlorite quartz phyllite, with minor amounts 221 of andesite and tuff. The southern part (D23) was mainly composed...middle Devonian 12 279 Sawuer Group (D2S) andesite, volcanic agglomerate, and volcanic breccia. The...slate. 330 In addition, there are Jurassic andesite outcrops located in the middle section of the mining...Resistivity (ohm) 2368.4 Location of sample Kp29 Andesite S74 Andesitic breccia 6.0 2.1×2.1 2708.9 |  | | Journal (article/letter/editorial) | | used for both named and unnamed units. Scattered outcrops east of Gunnan Ridge and the Kelvin Thrust, shown...ridge. Poorly outcropping, flow-foliated, pyroxene andesite is present beneath the Ourimperee Ignimbrite Member...homestead. The andesite differs from two occurrences of crystal-rich, pyroxene andesite west of Mountain...stratigraphic position of the crystal-rich andesite outcrops. The succeeding Tranquille Dacite, Yarralumba...Ignimbrite Member is a coarse, crystal-rich ignimbrite. Outcrops on Gunnan Ridge are extensively weathered and |
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