The Composition of the Ore-Forming Fluid and Physicochemical Parameters of the Formation of Economic Ores of the Malmyzh Au–Cu Porphyry Deposit, Far East, Russia: An Example of the Svoboda Ore Area

2021 ◽  
Vol 76 (2) ◽  
pp. 155-162
Author(s):  
V. V. Svistunov ◽  
V. Yu. Prokof’ev
Keyword(s):  
Physicochemical Parameters ◽  
Far East ◽  
Porphyry Deposit ◽  
East Russia

PERMIAN RADIOLARIAN FAUNAS FROM CHERT IN THE KHABAROVSK COMPLEX, FAR EAST RUSSIA, AND THE AGE OF EACH LITHOLOGIC UNIT OF THE KHABAROVSK COMPLEX

2005 ◽  
Vol 79 (4) ◽  
pp. 687-701 ◽  
Author(s):  
NORITOSHI SUZUKI ◽  
SATORU KOJIMA ◽  
HARUMASA KANO ◽  
SATOSHI YAMAKITA ◽  
AKIHIRO MISAKI ◽  
...  
Keyword(s):  
Far East ◽  
East Russia ◽  
Lithologic Unit

Bipolaris sacchari. [Distribution map].

2012 ◽  
Author(s):  
Keyword(s):  
Tamil Nadu ◽  
Solomon Islands ◽  
Far East ◽  
Uttar Pradesh ◽  
French Polynesia ◽  
Virgin Islands ◽  
Peninsular Malaysia ◽  
Pennisetum Purpureum ◽  
Distribution Map ◽  
East Russia

Abstract A new distribution map is provided for Bipolaris sacchari (E.J. Butler) Shoemaker. Ascomycota: Pleosporales. Hosts: sugarcane, citronella grass (Cymbopogon citratus) and elephant grass (Pennisetum purpureum). Information is given on the geographical distribution in Europe (Italy; Madeira, Portugal; and Far East, Russia), Asia (Bangladesh; Bhutan; Cambodia; Fujian, Guangdong, Guangxi, Hong Kong, Hunan, Jiangxi, Nei Menggu, Sichuan and Yunnan, China; Andaman and Nicobar Islands, Andhra Pradesh, Assam, Karnataka, Madhya Pradesh, Maharashtra, Rajasthan, Tamil Nadu, Uttar Pradesh and West Bengal, India; Irian Jaya, Indonesia; Iran; Israel; Japan; Peninsular Malaysia, Sabah and Sarawak, Malaysia; Myanmar; Pakistan; Philippines; Sri Lanka; Taiwan; Thailand; and Vietnam), Africa (Cameroon, Congo Democratic Republic, Egypt, Ghana, Kenya, Madagascar, Malawi, Mauritius, Mozambique, Nigeria, Reunion, Senegal, Sierra Leone, South Africa, Tanzania, Uganda, Zambia and Zimbabwe), North America (Mexico, and Alabama, Florida, Georgia, Hawaii, Louisiana and Maryland, USA), Central America and Caribbean (Antigua and Barbuda, Belize, Costa Rica, Cuba, Dominican Republic, El Salvador, Grenada, Guadeloupe, Guatemala, Haiti, Honduras, Jamaica, Martinique, Nicaragua, Panama, Puerto Rico, Saint Kitts and Nevis, Saint Lucia, Trinidad and Tobago, United States Virgin Islands and Windward Islands), South America (Argentina; Bolivia; Acre, Minas Gerais, Pernambuco and Rio Grande do Sul, Brazil; Colombia; French Guiana; Guyana; Peru; Suriname; and Venezuela) and Oceania (New South Wales and Queensland, Australia; Cook Islands; Federated States of Micronesia; Fiji; French Polynesia; New Zealand; Palau; Papua New Guinea; Samoa; Solomon Islands; and Vanuatu).

Holopogon pekinensis (Orchidaceae), a new heteromycotrophic species from Northern China

Phytotaxa ◽  
2017 ◽  
Vol 326 (2) ◽  
pp. 151
Author(s):  
XIAN-YUN MU ◽  
BING LIU ◽  
YI-XUAN ZHU ◽  
LING TONG ◽  
QIN-WEN LIN ◽  
...  
Keyword(s):  
New Species ◽  
Endangered Species ◽  
Conservation Status ◽  
Far East ◽  
Northern China ◽  
Identification Key ◽  
Beijing City ◽  
East Russia ◽  
Light Green

Holopogon pekinensis, a new heteromycotrophic orchid from Beijing City, China, is described and illustrated. This new species is morphologically similar to an endangered species endemic to Far East Russia, Holopogon ussuriensis Komarov & Nevski, but differs in having green flowers (vs white) and light green pubescence (vs red). Its conservation status and an identification key to Holopogon are provided.

scholarly journals Adakites, High-Nb Basalts and Copper–Gold Deposits in Magmatic Arcs and Collisional Orogens: An Overview

Geosciences ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 29
Author(s):  
Pavel Kepezhinskas ◽  
Nikolai Berdnikov ◽  
Nikita Kepezhinskas ◽  
Natalia Konovalova
Keyword(s):  
Subduction Zones ◽  
Far East ◽  
Gold Deposits ◽  
Type I ◽  
Isotopic Signatures ◽  
Epithermal Mineralization ◽  
Depleted Mantle ◽  
Mantle Sources ◽  
East Russia ◽  
Collisional Orogens

Adakites are Y- and Yb-depleted, SiO2- and Sr-enriched rocks with elevated Sr/Y and La/Yb ratios originally thought to represent partial melts of subducted metabasalt, based on their association with the subduction of young (<25 Ma) and hot oceanic crust. Later, adakites were found in arc segments associated with oblique, slow and flat subduction, arc–transform intersections, collision zones and post-collisional extensional environments. New models of adakite petrogenesis include the melting of thickened and delaminated mafic lower crust, basalt underplating of the continental crust and high-pressure fractionation (amphibole ± garnet) of mantle-derived, hydrous mafic melts. In some cases, adakites are associated with Nb-enriched (10 ppm < Nb < 20 ppm) and high-Nb (Nb > 20 ppm) arc basalts in ancient and modern subduction zones (HNBs). Two types of HNBs are recognized on the basis of their geochemistry. Type I HNBs (Kamchatka, Honduras) share N-MORB-like isotopic and OIB-like trace element characteristics and most probably originate from adakite-contaminated mantle sources. Type II HNBs (Sulu arc, Jamaica) display high-field strength element enrichments in respect to island-arc basalts coupled with enriched, OIB-like isotopic signatures, suggesting derivation from asthenospheric mantle sources in arcs. Adakites and, to a lesser extent, HNBs are associated with Cu–Au porphyry and epithermal deposits in Cenozoic magmatic arcs (Kamchatka, Phlippines, Indonesia, Andean margin) and Paleozoic-Mesozoic (Central Asian and Tethyan) collisional orogens. This association is believed to be not just temporal and structural but also genetic due to the hydrous (common presence of amphibole and biotite), highly oxidized (>ΔFMQ > +2) and S-rich (anhydrite in modern Pinatubo and El Chichon adakite eruptions) nature of adakite magmas. Cretaceous adakites from the Stanovoy Suture Zone in Far East Russia contain Cu–Ag–Au and Cu–Zn–Mo–Ag alloys, native Au and Pt, cupriferous Ag in association witn barite and Ag-chloride. Stanovoy adakites also have systematically higher Au contents in comparison with volcanic arc magmas, suggesting that ore-forming hydrothermal fluids responsible for Cu–Au(Mo–Ag) porphyry and epithermal mineralization in upper crustal environments could have been exsolved from metal-saturated, H2O–S–Cl-rich adakite magmas. The interaction between depleted mantle peridotites and metal-rich adakites appears to be capable of producing (under a certain set of conditions) fertile sources for HNB melts connected with some epithermal Au (Porgera) and porphyry Cu–Au–Mo (Tibet, Iran) mineralized systems in modern and ancient subduction zones.

Puccinia ferruginea. [Descriptions of Fungi and Bacteria].

2011 ◽  
Author(s):  
P. F. Cannon
Keyword(s):  
Hong Kong ◽  
Sierra Leone ◽  
Papua New Guinea ◽  
Tamil Nadu ◽  
Host Plants ◽  
Russian Far East ◽  
Far East ◽  
Uttar Pradesh ◽  
Northern Territory ◽  
East Russia

Abstract A description is provided for P. ferruginea. Information on dispersal and transmission, geographical distribution (Kenya; Sierra Leone; Bangladesh; Anhui, Fujian, Guangdong, Guangxi, Hong Kong and Yunnan, China; Assam, Maharashtra, Tamil Nadu, Uttar Pradesh and Uttarakhand, India; Indonesia; Japan; Russian Far East, Russia; Sri Lanka; Taiwan; Northern Territory, Australia; and Papua New Guinea), and host plants (Heterosmilax gaudichaudiana, H. japonica, Smilax arisanensis, S. aspera, S. bracteata, S. davidiana, S. discotis, S. elegans, S. ferox, S. glauco-china, S. hypoglauca, S. lanceifolia, S. microphylla, S. nipponica, S. riparia, S. sieboldii, S. stans and S. zeylanica) is included.

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