Matches in SemOpenAlex for { <https://semopenalex.org/work/W2031678578> ?p ?o ?g. }
Showing items 1 to 76 of
76
with 100 items per page.
- W2031678578 abstract "The mineralogy of specimens from seven manganese deposits in the Olympic Peninsula has been studied by microscope and x-ray diffraction methods. Primary minerals are chiefly silicates and oxides. Among the silicates bementite is predominant, and minor minerals include hibschite, rhodonite, johannsenite, tephroite, inesite, grossularite, and alleghanyite. Hausmannite is the chief oxide mineral, but in some deposits braunite and jacobsite are common. Crednerite is present in trace amounts, as is hematite. Carbonates, including rhodochrosite, manganoan calcite, and calcite, are widespread but are nowhere abundant. Alabandite, barite, quartz, and native copper, with associated cuprite, are rare.Interpretation of microscopic textural relationships leads to the recognition of three general periods in the primary paragenetic sequence. Pre-bementite minerals include hibschite, rhodonite, tephroite, johannsenite, and alleghanyite. Minerals more or less contemporaneous with bementite are braunite, hausmannite, jacobsite, crednerite, alabandite, barite, copper, manganiferous carbonate, and probably grossularite. Post-bementite minerals include manganiferous carbonate and calcite, inesite, and quartz.Supergene minerals are widespread but not abundant. They generally form thin veinlets in the primary material and consist chiefly of hydrous calcium-manganese oxides (rancieite, todorokite, and birnessite). Nsutite is the only manganese dioxide mineral recognized. Neotocite accompanies most of the supergene oxides.The primary deposits show microscopic features consistent with deposition in a sedimentary environment. These include micro-conglomerates, tuffaceous breccias, probable fossils, crystalline micro-pellets, and rare stratification. Some hausmannite specimens show nodular colloform structure that is suggestive of accretionary growth similar to that of modern marine manganese nodules.It is concluded that the mineralogy is consistent with a hypothesis of marine origin similar to that proposed by Park (38). Evidence is lacking for appreciable post-diagenetic change or for later introduction of the manganese and silica. The ultimate source of these constituents, however, is uncertain. Some connection with submarine vulcanism, however, seems probable." @default.
- W2031678578 created "2016-06-24" @default.
- W2031678578 creator A5083651319 @default.
- W2031678578 creator A5091343523 @default.
- W2031678578 date "1967-01-01" @default.
- W2031678578 modified "2023-09-24" @default.
- W2031678578 title "Mineralogy of manganese deposits, Olympic Peninsula, Washington" @default.
- W2031678578 doi "https://doi.org/10.2113/gsecongeo.62.1.22" @default.
- W2031678578 hasPublicationYear "1967" @default.
- W2031678578 type Work @default.
- W2031678578 sameAs 2031678578 @default.
- W2031678578 citedByCount "19" @default.
- W2031678578 crossrefType "journal-article" @default.
- W2031678578 hasAuthorship W2031678578A5083651319 @default.
- W2031678578 hasAuthorship W2031678578A5091343523 @default.
- W2031678578 hasConcept C127313418 @default.
- W2031678578 hasConcept C145761182 @default.
- W2031678578 hasConcept C17409809 @default.
- W2031678578 hasConcept C178790620 @default.
- W2031678578 hasConcept C185592680 @default.
- W2031678578 hasConcept C199289684 @default.
- W2031678578 hasConcept C2776062231 @default.
- W2031678578 hasConcept C2776268066 @default.
- W2031678578 hasConcept C2776432453 @default.
- W2031678578 hasConcept C2776597492 @default.
- W2031678578 hasConcept C2778818709 @default.
- W2031678578 hasConcept C2779002002 @default.
- W2031678578 hasConcept C2779471666 @default.
- W2031678578 hasConcept C2780191791 @default.
- W2031678578 hasConcept C2780659211 @default.
- W2031678578 hasConcept C2993225395 @default.
- W2031678578 hasConcept C528890316 @default.
- W2031678578 hasConceptScore W2031678578C127313418 @default.
- W2031678578 hasConceptScore W2031678578C145761182 @default.
- W2031678578 hasConceptScore W2031678578C17409809 @default.
- W2031678578 hasConceptScore W2031678578C178790620 @default.
- W2031678578 hasConceptScore W2031678578C185592680 @default.
- W2031678578 hasConceptScore W2031678578C199289684 @default.
- W2031678578 hasConceptScore W2031678578C2776062231 @default.
- W2031678578 hasConceptScore W2031678578C2776268066 @default.
- W2031678578 hasConceptScore W2031678578C2776432453 @default.
- W2031678578 hasConceptScore W2031678578C2776597492 @default.
- W2031678578 hasConceptScore W2031678578C2778818709 @default.
- W2031678578 hasConceptScore W2031678578C2779002002 @default.
- W2031678578 hasConceptScore W2031678578C2779471666 @default.
- W2031678578 hasConceptScore W2031678578C2780191791 @default.
- W2031678578 hasConceptScore W2031678578C2780659211 @default.
- W2031678578 hasConceptScore W2031678578C2993225395 @default.
- W2031678578 hasConceptScore W2031678578C528890316 @default.
- W2031678578 hasLocation W20316785781 @default.
- W2031678578 hasOpenAccess W2031678578 @default.
- W2031678578 hasPrimaryLocation W20316785781 @default.
- W2031678578 hasRelatedWork W1602046462 @default.
- W2031678578 hasRelatedWork W1984466054 @default.
- W2031678578 hasRelatedWork W1986515156 @default.
- W2031678578 hasRelatedWork W1996681409 @default.
- W2031678578 hasRelatedWork W2005594490 @default.
- W2031678578 hasRelatedWork W2006155482 @default.
- W2031678578 hasRelatedWork W2023989514 @default.
- W2031678578 hasRelatedWork W2085693114 @default.
- W2031678578 hasRelatedWork W2100988070 @default.
- W2031678578 hasRelatedWork W2126952920 @default.
- W2031678578 hasRelatedWork W2135379230 @default.
- W2031678578 hasRelatedWork W2319525270 @default.
- W2031678578 hasRelatedWork W2319985994 @default.
- W2031678578 hasRelatedWork W2328666178 @default.
- W2031678578 hasRelatedWork W2329248312 @default.
- W2031678578 hasRelatedWork W2331555838 @default.
- W2031678578 hasRelatedWork W3003863698 @default.
- W2031678578 hasRelatedWork W3048180641 @default.
- W2031678578 hasRelatedWork W3095682698 @default.
- W2031678578 hasRelatedWork W2002981688 @default.
- W2031678578 isParatext "false" @default.
- W2031678578 isRetracted "false" @default.
- W2031678578 magId "2031678578" @default.
- W2031678578 workType "article" @default.