The Phanerozoic history of North America can be divided into three broad phases:
During the first phase, which lasted from the Late Precambrian to the Triassic, Pangea was under construction. The western continental margin was either a divergent (‘‘passive’’) margin, facing the paleo-Pacific Ocean (Panthalassa) or a backarc basin bordering that ocean, while the eastern margin, beginning in the Middle Ordovician, underwent convergent and collisional tectonism, with the generation of the Appalachian orogen.

Субэпитермальная Au-Pd минерализация, связанная со щелочно-порфировым Cu-Au месторождением, гора Миллиган, террейн Кеснел, Британская Колумбия, Канада

At the Mount Milligan Cu-Au porphyry deposit, Quesnel terrane, British Columbia, Canada, barren and weakly mineralized, late-stage hydrothermal veins occur in volcanic rocks adjacent to zones of Cu-Au porphyry mineralization, and have overprinted the porphyry-stage veins. The earliest of the late-stage hydrothermal veins are barren and consist of quartz ± pyrite ± carbonate ± chlorite ± tourmaline. These veins are similar to “transitional” to late-stage hydrothermal veins in other alkaline porphyry Cu-Au deposits, and we consider these to be the equivalent of transitional (post-porphyry, pre-epithermal) quartz-sericite-pyrite veins in calc-alkaline porphyry environments.

A National Standard of Canada is a standard developed by an SCC-accredited Standards Development Organization (SDO), and approved by the Standards Council of Canada (SCC), in accordance with SCC’s: Requirements and Guidance-Accreditation for Standards Development Organizations, and Requirements and Guidance-Approval of National Standards of Canada Designation.

The Geological Association of Canada (GAC) recognizes that its field trips may involve hazards to the leaders and participants. It is the policy of the Geological Association of Canada to provide for the safety of participants during field trips, and to take every precaution, reasonable in the circumstances, to ensure that field trips are run with due regard for the safety of leaders and participants.

The CIM Definition Standards on Mineral Resources and Reserves (CIM Definition Standards) establish definitions and guidance on the definitions for Mineral Resources, Mineral Reserves, and mining studies used in Canada. The Mineral Resource, Mineral Reserve, and mining study definitions are incorporated, by reference, into National Instrument 43-101 – Standards of Disclosure for Mineral Projects (NI 43-101). The CIM Definition Standards can be viewed at mrmr.cim.org.

To investigate the ability of komatiites to preserve during alteration a record of the geochemical and isotopic composition of the Archean mantle, we studied the petrology and geochemistry of a komatiite flow from Alexo, Ontario. Although this flow is relatively well preserved, two main types of alteration are recognized: (1) hydration of variable intensify throughout the whole flow; (2) local rodingitization. In samples only slightly affected by hydration, the alteration was essentially isochemical;

Working with Migmatites: Nomenclature for the Constituent Parts Edward W. Sawyer

Identifying the Parts of Migmatites in the Field Edward W. Sawyer

Crustal Melting: Working with Enclaves Bernardo Cesare

Decoding Migmatite Microstructures Marian Holness

Insights into Crustal Melting and the Formation of Migmatites Gained from the Petrological Modeling of Migmatites Richard W. White

Granites, Migmatites and Residual Granulites: Relationships and Processes Michael Brown

The interplay between tectonics/structure and migmatite morphology in the field Gary Solar

Wawa has long been a center of mineral exploration activity and diamonds have been reported in the area since the 1930s. However, diamond exploration did not begin in the area in earnest until 1991. In 1993, Sandor Surmacz and Marcelle Hauseux of Saminex began a prospecting program in the area which culminated in their discovery of the “Sandor” diamond occurrence in an outcrop on the east side of the Trans-Canada Highway.

Landsat Thematic Mapper [TM) data have been used to detect the presence of altered rocks associated with ore mineral deposition. In arid environments, the spectral signatures of diagnostic minerals are often not masked by water, vegetation, or suxficial materials. There are many studies in which TM data have been used to locate hydrothermally altered rocks in near desert regions, but few successful examples can be found that relate to glaciated, vegetated terrain at high latitudes. In this paper, TM data, in concert with lithogeochemical data and field observations, are used to detect and map altered rocks in the Sulphurets-Brucejack Lake district of northwestern British Columbia.

1. Создание прогнозных карт урана типа "несогласия" на основе нечетко-логического моделирования минеральнго потенциала МРМ. Бассейн Атабаска (Канада). СЗ МакАртур (Австралия)

2. Региональное прогнозирование вольфрама, олова и ниобий-тантала на основе нечетко-логического моделирования минерального потенциала МРМ интегрированныя информация по Руанде (Центральная Африка)