 | | Report (issue) | | poorly bedded and generally poorly exposed sedimentary breccia, conglomerate, and sandstone of probable...of a western gray facies, here called the sedimentary breccia of Apache Potrero (Tap), composed primarily...and an eastern red facies, here called the sedimentary breccia and sandstone of Cowhead Potrero (Tcp), composed...represent alluvial-fan environments. The sedimentary breccia and sandstone of Cowhead Potrero depositionally...canyon of Santiago Creek near the northwest corner of the quadrangle. The sedimentary breccia of Apache |  | | Journal (article/letter/editorial) | | Geology Vol. 59, 1964, pp. 428-442 STRATIGRAPHY SEDIMENTARY AND MINERALOGY DEPOSITS LUIS AGUIRRE OF...Geo16gicas (IIG), Chile. 428 M/tNG•INESE SEDIMENTARY DEPOSITS OF CHILE 429 Instituto de Investigaciones...light gray, aphanitic limestone. Also calcareous breccia with a dusky-red matrix and angularfragmentsof...rupted by channel structures filled with sedimentary breccia. d) Grayish red, fine to medium-grainedsandstonecontaining... to 30 cm in diameter. Sedimentary breccia(mud flows?), andesiticflow breccia,and intercalationsof red |  | | Report (volume) | | fossiliferous, continuously deposited marine sedimentary sequences in California of early and middle Tertiary...western Tehachapi Mountains form a sequence of sedimentary and volcanic rocks that is valuable for related...assemblages and radiometric dates from nonmarine sedimentary and volcanic rocks to the east. The ages, stratigraphic...REGIONAL GEOLOGY The lower and middle Tertiary sedimentary sequence exposed on the north flanks of the San...unconformably by late Cenozoic predominantly nonmarine sedimentary rocks described and mapped by Hoots (1930), Dibblee |  | MATHUR, R., Marschik, R., Ruiz, J., Munizaga, F., Leveille, R. A., Martin, W. (2003) AGE OF MINERALIZATION OF THE CANDELARIA Fe OXIDE Cu-Au DEPOSIT ANDTHE ORIGIN OF THE CHILEAN IRON BELT, BASED ON Re-Os ISOTOPES--A REPLY. Economic Geology, 98 (5) 1050-1052 doi:10.2113/gsecongeo.98.5.1050 | Journal (article/letter/editorial) | | de Geología y Geofísica, Universidad de Chile, Santiago, Chile RICHARD A. LEVEILLE, Phelps Dodge Exploration...Chañarcillo Group is absent. The andesite, volcanic breccia, and sandstone sequence in the Teresa de Colmo...advocated by Mathur et al. (2002) for a radiogenic sedimentary source of Os is robust, but here we clarify that...base of a red continental sedimentary breccia or conglomerate (the Basal Breccia, Punta del Cobre Formation)...(Camus, 1986; Marschik and Fontboté, 2001a). The sedimentary record on top of the massive volcanic rocks in |  | | Journal (article/letter/editorial) | | small (0.2–1 mm) pores (sample S2304/1) and sedimentary breccia with clasts of nonporous grayish green volcanic...contents. However, some rocks of the Fogo and Santiago islands also have low MgO contents (<10%) [6,...volcanic rocks of the Cape Verde Islands (Maio, Sal, Santiago, 246 PEYVE, SKOLOTNEV Sample/Chondrite 1000...of some Cape Verde islands: the dark field is Santiago island, the dashed field is Sao Vicente Island |  | | Journal (article/letter/editorial) | | Indio belt LOBO LA PEPA VOLCAN PANTANILLOS Santiago -70° -27°30’ REFUGIO 200 km FIG. 1. Location...are capped by Triassic bimodal volcanic and sedimentary rocks deposited in extensional rift basins and...Jurassic to Early Cretaceous marine and continental sedimentary rocks that accumulated in a backarc basin developed...volcanic units are covered by Oligocene continental sedimentary sequences, composed of red sandstone, siltstone...four broad units: premineral sedimentary host rocks; volcanic breccia, which also predates all the potentially |  | | Report (issue) | | floored by Pliocene, Pleistocene, and Holocene sedimentary deposits (Mason, Vallecito, and Carrizo Valleys)...metasedimentary layers and are lithologically similar to the Santiago Peak Volcanics (Larsen, 1948), which form the...on the west, marine sedimentation. The oldest sedimentary rocks that overlap the batholith in San Diego...pluton in the area and by overlying Pliocene sedimentary rocks. Regional evidence indicates that low-angle...conglomerate (in part grading to tuff-breccia and (or) reworked tuff-breccia)(Todd, 1978a, 1979; Todd and Shaw |  | Masterman, G. J., Cooke, D. R., Berry, R. F., Clark, A. H., Archibald, D. A., Mathur, R., Walshe, J. L., Duran, M. (2004) 40Ar/39Ar and Re-Os Geochronology of Porphyry Copper-Molybdenum Deposits and Related Copper-Silver Veins in the Collahuasi District, Northern Chile. Economic Geology, 99 (4) 673-690 doi:10.2113/gsecongeo.99.4.673 | Journal (article/letter/editorial) | | Miocene-Pliocene Porphyry Copper Belt N Andina Santiago 35° 0 km El Teniente 500 km FIG. 1. Map showing...Formation) overlie deep to shallow marine Jurassic sedimentary rocks (Quehuita Formation). Both formations unconformably...overlie continental to shallow marine volcanic and sedimentary rocks of the Permo-Triassic Collahuasi Formation...several flows) overlain by rhyolite and sedimentary breccia (Fig. 5A; Bisso et al., 1998). Two main ...R200154 UC447, 510.3 m 0.4% copper contour Sedimentary breccia Inca Porphyry Rhyolite Ujina Porphyry |  | | Journal (article/letter/editorial) | | (Mt) at 1.0 percent Cu. The ore occurs in veins, breccia, and stringer bodies, and in replacement bodies...include: the Basal Breccia, the Trinidad Siltstone, and the Upper Lavas. The Basal Breccia (up to 25 m) is...is a red sedimentary breccia, in places conglomeratic, that contains interdigitations of sandstone and...Andesites. The Basal Breccia hosts stratiform orebodies and the top of the Basal Breccia commonly marks the...the Basal Breccia is mainly composed of silt- and sandstone, chert, and tuffaceous sedimentary rocks, which |  | | Journal (article/letter/editorial) | | ARTICLE R. Fleischer A rift model for the sedimentary diamond deposits of Brazil Received: 13 January...production has been derived almost entirely from sedimentary deposits: diamond-bearing conglomerates of dierent...thus a very privileged area to study diamond sedimentary deposits, not only because they are numerous...importance, but also and mainly because they occur in sedimentary sequences of at least four dierent ages. The...recognition of common geological features in diamond sedimentary sequences of dierent ages led to the conclusion |  | | Book | | deposits require knowledge of the stratified sedimentary and/or volcanic host rock, the previous gap between... . . . . . . . . . . . . . 365 c) Volcano-Sedimentary Sequences in Back-Arc Basins (in Part Marginal.... . . . . . . . . . . . . . 485 d) Marine Sedimentary Sequences in Back-Arc Basins Geologic Evolution...al. 1976). 2. Lower Paleozoic, terrigenous, sedimentary rocks including basic pyroclastics which, together...(Megard 1987), seem to form a first Paleozoic sedimentary cycle that ended with the Late Devonian uplift |  | | Journal (article/letter/editorial) | | Case study Optical granulometric analysis of sedimentary deposits by color segmentation-based software:...images. We test the novel algorithm in different sedimentary deposit types from 14 varieties of sedimentological...outcrop is, in many cases, a complicated task. Sedimentary deposits are often characterized by a wide range...Due to the difficulty in segmenting images of sedimentary outcrops in order to separate clasts from the...of sedimentary deposits, which have different colors, textures and shapes, as well as sedimentary structures |  | Cordeiro, Pedro F.O., Oliveira, Claudinei G., Paniago, Luiz N., Romagna, Glacir, Santos, Roberto V. (2018) The carbonate-hosted MVT Morro Agudo Zn-Pb deposit, central Brazil. Ore Geology Reviews, 101. 437-452 doi:10.1016/j.oregeorev.2018.08.002 | Journal (article/letter/editorial) | | Santos3 1 Pontifícia Universidad Católica de Chile, Santiago, Chile 2 Universidade Federal do Paraná, Curitiba...Mesoproterozoic-Neoproterozoic carbonate-dominant sedimentary sequence thrusted over Neoproterozoic rocks during...the Main Fault. Five orebodies are described: a) Breccia-hosted orebody “GHI”, b) Sphalerite-rich doloarenite...sulfides, b) Massive Ore, c) Laminated Ore, d) Breccia-hosted Ore, e) Late stage fracture-filling Ore...imbricated Neoproterozoic and Mesoproterozoic sedimentary rocks. Based on our work of sulfide textural |  | | Book | | Onofre Pacific between North and Plates American | Breccia displacement transform Andreas San Ongoing Rhyolite...and Catalina Schists MESOZOIC Extrusion of Santiago Peak Volcanics 145 Batholith Plate North American...according to their origin, whether igneous, sedimentary, or metamorphic. The size, shape, and arrangement...should suffice in most cases. INTRODUCTION SEDIMENTARY ROCKS. Mud, silt, sand, and gravel, the ingredients...even other sedimentary rock. Individual particles or fragments of rock within sedimentary rocks are called |  | Johnson, Scott E., Paterson, Scott R., Fletcher, John M., Girty, Gary H., Kimbrough, David L., Martín-Barajas, Arturo - Eds. (2003) Tectonic evolution of northwestern Mexico and the Southwestern USA. GSA Special Paper 374. Geological Society of America doi:10.1130/0-8137-2374-4 | Report (issue) | | and pioneered its use as a provenance tool in sedimentary successions. Inasmuch as Gordon and his students...and southern California. They conclude that the Santiago Peak and Alisitos arcs exposed north and south...respectively, have distinct histories, with the Santiago Peak representing a continental margin arc and...other topics, such as paleontology and modern sedimentary environments, is incomplete or absent. This paper...(undated) K plutonic rocks Early Cretaceous arc (Santiago Peak Cochimi Mesozoic island arcs, ophiolites |  | | Journal (article/letter/editorial) | | overlain by a 200 m thick homoclinal sequence of sedimentary and felsic volcanic beds of the IbaÂnÄez formation...Universidad de Chile, Casilla 13518 correo 21, Santiago, Chile 548 Fig. 1 Map showing the distribution...homoclinal sequence (N80°E±N80°W/20°± 30°N) of sedimentary and volcanic beds, which represents the lowest...from bottom to top, of a 50 m thick basal sedimentary breccia and a 150 m thick succession of dacitic and...lavas, hydrothermal eruption breccias and their sedimentary reworked equivalents. Two intrusive units are |  | Deyell, C. L., Leonardson, R., Rye, R. O., Thompson, J. F. H., Bissig, T., Cooke, D. R. (2005) Alunite in the Pascua-Lama High-Sulfidation Deposit: Constraints on Alteration and Ore Deposition Using Stable Isotope Geochemistry. Economic Geology, 100 (1) 131-148 doi:10.2113/100.1.0131 | Journal (article/letter/editorial) | | alunite-enargite veins at El Indio (Jannas et al., 1999), and breccia- and veinhosted mineralization at Tambo (Jannas...system. Geology of the Pascua-Lama Region Mendoza Santiago Average elevation 3kilometres > El eT Teniente...area, including large, premineral phreatomagmatic breccia pipes and small postmineral pebble dikes and alunitejarosite...breccias (Chouinard, 2003). The most significant breccia in the region is Brecha Central, which hosts roughly...25 percent of total gold mineralization. This breccia is sited on and elongate parallel to east-southeast |  | | Book | | and Temporal Settings in the World’s Largest Sedimentary Copper District Gregor Borg, Adam Piestrzyński...relating to the origin of copper-bearing tourmaline breccia pipes, Chile: Economic Geology, v. 65, p. 1028–1041...Recognition of bulk gold potential in Mount Leyshon breccia system, Queensland, Australia (mine now exhausted)...local community). 2007: Geologic modeling of breccia-hosted Cu-Au deposits in Gaoua district, Burkina... Michael Harris, London, and Francisco Camus, Santiago, Editors xiii © 2012 Society of Economic Geologists |  | | Report (chapter) | | others the sub-volcanic basement, consisting of sedimentary and intru, sive rocks. Post-mineral volcanic...dyke-like bodies of diorite porphyry and hydrothermal breccia, are located within a caldera of late Caenozoic...rhodochrosite and calcite fill open-space in a breccia body, apparently within a volcanic edifice. 18...Summitville;UN, Uncompahgre) widespread, include breccia pipes associated with small quartz latite porphyry...Pandora-Camp Bird and other vein systems and Red Mountain breccia-pipe district on northwest side of Silverton caldera |  | Baker, Michael J., Wilkinson, Jamie J., Wilkinson, Clara C., Cooke, David R., Ireland, Tim (2020) Epidote Trace Element Chemistry as an Exploration Tool in the Collahuasi District, Northern Chile. Economic Geology, 115 (4). 749-770 doi:10.5382/econgeo.4739 | Journal (article/letter/editorial) | | overlain by deep- to shallow-marine Jurassic sedimentary rocks of the Quehuita Formation. Overlying the...andesite sequence overlain by rhyolite and sedimentary breccia (Bisso et al., 1998; Masterman et al., 2004)...Andesite Diorite Dacite Andesite Diorite Rhyolite Breccia Rhyolite Volcaniclastic Diorite Rhyolite Diorite...Andesite Diorite Dacite Andesite Diorite Rhyolite Breccia Rhyolite Volcaniclastic Diorite Rhyolite Diorite...for Mining and Metallurgy, Mining Latin America, Santiago, Chile, 1994, Proceedings, p. 181–195. Dick, L |  | | Book | | o f the porphyries have later gold and barren breccia pipe over prints. Some, such as at Lepanto and...Perm-Carb. Perm-Carb, Carbonif. Epithermal Breccia pipe Breccia pipe Lo Sulphidation Fiji (Viti Levu) ...a C oipa Chile Mioc-OIigocene Diatreme breccia Breccia Sediment Hosted Lo Sulphidation Sediment Hosted...Aus Start apices o f zoned batholiths; skams; breccia pipes; supergene caps over low grade hypogene mineralisation...Australia. There are other great hydrothermal breccia "pipe" hosted deposits within the TaDle 7 L |  | Chouinard, A., Williams-Jones, A. E., Leonardson, R. W., Hodgson, C. J., Silva, P., Tellez, C., Vega, J., Rojas, F. (2005) Geology and Genesis of the Multistage High-Sulfidation Epithermal Pascua Au-Ag-Cu Deposit, Chile and Argentina. Economic Geology, 100 (3) 463-490 doi:10.2113/gsecongeo.100.3.463 | Journal (article/letter/editorial) | | mainly of Triassic granite and heterolithic Miocene breccia pipes. Granitic rocks host ~60 percent of the mineralization...mineralization (or >80% if granitic breccia fragments are included) but were not the cause of hydrothermal...centered on Brecha Central, the largest of the breccia pipes, and several smaller satellite bodies that...ESCABROSO GROUP ANDESITIC FLOWS AND VOLCANICLASTIC SEDIMENTARY ROCKS DIORITE AND GRANODIORITE TILLITO FORMATION...Between the Eocene and Oligocene, igneous and sedimentary rocks of the Carboniferous-Triassic Pastos de |  | | Journal (article/letter/editorial) | | Avenida Primavrea 834, Chacarilla del Estanque, Santiago de Surco, 33, Lima, Peru a r t i c l e i n f...graben, to the west, contains an allochthonous sedimentary sequence derived from the Western Andean Cordillera...Maranon Complex suggest derivation of a volcano-sedimentary protolith by erosion of the Sunsas–Rondonia–San...craton (Chew et al., 2007). The volcanic and sedimentary succession that defines the Eastern Andean Cordillera...Florida Group (Mafic to intermediate volcaniclastic sedimentary rocks and andesite, subvolcanic dioritic intrusions) |  | | Book (volume) | | are founded in sedimentary rocks, mainly late Mesozoic limestones and clastic sedimentary rocks of midI^te...Iceland Nicaragua Indonesia Kenya Soviet Union China Portugal Turkey France Total Expected 1986 June 1984...estab¬ lished the presence of a reservoir in sedimentary rocks capable of producing enough steam to generate...geosyncline. Many of these are found within Mesozoic sedimentary rocks, and others in volcanic and intrusive areas...cover or interrupt the geosyncline. Within the sedimentary rocks, thermal spots predominate in or near Cretaceous | | | Report (issue) | | ..........................................6 Sedimentary Rocks...........................................................................7 Tertiary Sedimentary Rocks.............................................................7 Tertiary to Cretaceous Sedimentary Rocks........................................................................17 Cretaceous Sedimentary Rocks............................................................19 Cretaceous to Jurassic Sedimentary Rocks....................................... |
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