scholarly journals Organic geochemistry of the upper cretaceous-tertiary delta complexes of the Beaufort-Mackenzie sedimentary basins, Northwest Territories

1981 ◽  
Author(s):  
L R Snowdon
Keyword(s):  
Northwest Territories ◽  
Upper Cretaceous ◽  
Organic Geochemistry ◽  
Sedimentary Basins

Potassium–argon ages of intrusion and scheelite mineralization, Cantung, Tungsten, Northwest Territories

1978 ◽  
Vol 15 (7) ◽  
pp. 1205-1207 ◽  
Author(s):  
Douglas A. Archibald ◽  
Alan H. Clark ◽  
Edward Farrar ◽  
U Khin Zaw
Keyword(s):  
Northwest Territories ◽  
Late Stage ◽  
Upper Cretaceous ◽  
Quartz Monzonite ◽  
Mackenzie Mountains ◽  
Tungsten Mineralization

K–Ar dating of magmatic biotite, and of hydrothermal biotite and muscovite, demonstrates that quartz monzonite intrusion and exoskarn scheelite mineralization at Cantung, N.W.T., took place over a brief interval in the Upper Cretaceous (ca. 91 Ma). The regional age relationships of magmatic and ore-forming activity in the Logan–Mackenzie Mountains are poorly defined, but it is tentatively inferred that tungsten mineralization may have been related to a late stage in the plutonic development of the area.

scholarly journals Provenance and weathering index of the Upper Cretaceous São Carlos Formation and its tectonic significance in the eastern Bauru Basin, SE Brazil

2019 ◽  
Vol 19 (3) ◽  
pp. 77-94
Author(s):  
Lara Ferreira Neves ◽  
Alessandro Batezelli
Keyword(s):  
Trace Elements ◽  
Chemical Weathering ◽  
Upper Cretaceous ◽  
Source Area ◽  
Sedimentary Basins ◽  
Major And Trace Elements ◽  
Published Data ◽  
Weathering Index ◽  
Se Brazil ◽  
Eastern Border

Geochemistry of major and trace elements has been used as an important tool for the study of provenance and tectonic and climatic evolution of sedimentary basins. The São Carlos Formation is an Upper Cretaceous unit that lies on the eastern border of the Bauru Basin. Despite the paleontological and paleodepositional studies performed in this unit in the last years, little is known about the correspondence between tectonic and climatic conditions acting during the first stages of sedimentation. The hypothesis of this paper is to evaluate São Carlos and Araçatuba formations and understand the evolution of the eastern border of the basin. Thus, were conducted geochemical studies using X-ray fluorescence on sandstones, siltstones, and shales from the São Carlos Formation. According to the chemical weathering index, which presented values ranging from 57.12 to 71.58%, the oxides of major elements indicate that moderate weathering processes affected the source area, possibly associated with the arid-semiarid climate. Alkaline rocks, granites, gneisses, and metasediments were the main lithotypes of the source area. Ternary diagrams show that the tectonic environment was equivalent to the passive continental margin, coinciding with the Serra do Mar and, secondarily, Alto Paranaíba Uplift regions. Based on major and trace elements, their ratios, and published data on the basin, was elaborated a paleogeographic model of the eastern border of the Bauru Basin, concluding that the source area of the sediments was constituted by intermediate and felsic rocks, sometimes recycled by sedimentary processes.

ORGANIC GEOCHEMISTRY OF CRUDE OILS AND UPPER CRETACEOUS SOURCE ROCKS FROM CONCESSION 11, WEST SIRTE BASIN, LIBYA

2016 ◽  
Vol 39 (4) ◽  
pp. 393-413 ◽  
Author(s):  
W. Sh. El Diasty ◽  
S. Y. El Beialy ◽  
K. E. Peters ◽  
H. El Atfy ◽  
A. M. Gheith ◽  
...  
Keyword(s):  
Upper Cretaceous ◽  
Organic Geochemistry ◽  
Source Rocks ◽  
Crude Oils ◽  
Sirte Basin

Organic geochemistry of the Pine Point lead-zinc ore field and region, Northwest Territories, Canada

1983 ◽  
Vol 78 (1) ◽  
pp. 1-25 ◽  
Author(s):  
R. W. Macqueen ◽  
T. G. Powell
Keyword(s):  
Northwest Territories ◽  
Organic Geochemistry ◽  
Lead Zinc ◽  
Pine Point

Recent and future mineral developments in northern Canada. By Oil and Mineral Division, Department of Indian Affairs and Northern Development, Ottawa

Polar Record ◽  
1970 ◽  
Vol 15 (95) ◽  
pp. 151-166 ◽  
Keyword(s):  
Northwest Territories ◽  
Oil And Gas ◽  
Rapid Development ◽  
Sedimentary Basins ◽  
Oil And Gas Industry ◽  
Yukon Territory ◽  
The Arctic ◽  
Mountain Area ◽  
Southern Boundary ◽  
Northern Canada

Northern Canada consists of two political subdivisions. Yukon Territory and the Northwest Territories. Some 3.8 million km2 of land and the large continental shelf lie north of lat 60°N, which is the southern boundary of the two territories. The land area comprises 40 per cent of the whole of Canada. Distances are great, topography varies from flat plains and muskeg to high mountains, and variations in temperature are extreme. Nevertheless, despite these difficulties, the north is a land of great change and rapid development, particularly in the field of mineral exploitation. It was once considered that these territories were destined to remain a producer of precious metals only—commodities of high unit value. The turning point in mining developments came in November 1964, when the first shipment of ore from the Pine Point lead-zinc deposits marked the start of the tremendous and continuing surge forward in mining development. The oil and gas industry has also shown a keen interest in the potential of northern Canada in recent years and the sedimentary basins are all but covered with oil and gas exploration permits. A significant gas strike has been made in the Arctic archipelago and, far away in the south-west corner of the Northwest Territories, a major gas pool is being developed in the Pointed Mountain area.

scholarly journals Fácies orgânica da Formação La Luna, Bacia do Valle Superior Del Magdalena, Colômbia: implicações para a geração de petróleo e caracterização paleoambiental

2007 ◽  
Vol 30 (2) ◽  
pp. 65-81
Author(s):  
Juliana Andrade Iemini ◽  
João Graciano Mendonça Filho ◽  
Felix Thadeu Teixeira Gonçalves ◽  
Taíssa Rêgo Menezes
Keyword(s):  
Upper Cretaceous ◽  
Thermal Evolution ◽  
Organic Geochemistry ◽  
Maturation Stage ◽  
Hydrocarbon Production ◽  
Thermal Maturation ◽  
Oil Reserves ◽  
Organic Facies ◽  
Oil Generation ◽  
La Luna

Upper Cretaceous pelitic rocks generate most of the oil reserves in Colombia. In Del Magdalena Upper Valley (MUV), the existence of good quality outcrops and thermal evolution levels that vary from immaturity to the end of the oil generation "window" makes it one of the most appropriate regions for the study of primary migration and generation of oil in Upper Cretaceous. The main objectives of this work were to study the organic facies of La Luna Formation in an outcrop section called Riacho Bambuca (Bambuca Creek), determine the oil generation potential and characterize the paleoenvironment. For this research, 24 samples were used in palynofacies analysis (characterization of the kerogen components assembly) and in organic geochemistry analysis (Total Organic Carbon - TOC analysis and Rock-Eval pyrolysis, provided by Colombia Oil Institute - ECOPETROL). The palynofacies analysis included the use of microscopy techniques (transmitted white light and incident blue light). Furthermore, a Spore Coloration Index (SCI) analysis was made in order to determine the thermal maturation stage. The studied material was composed mainly of an amorphous organic substance, with its fluorescent coloration varying from yellow to bright orange. The palynomorph group is represented by spore morph and dinoflagellate cysts. The ligneous material are present in very low percentages; they are mainly opaque phytoclasts. The results of geochemical analysis showed TOC contents ranging from medium to high, excellent potential for the generation of hydrocarbons (PG >; 4 mg HC/g of rock), hydrogen index ranging from 329 to 589 mg HC/g, and low values of oxygen index, characterizing type II kerogen. The low degree of thermal maturation was determined by Spore Coloration Index values ranging from 2,5 to 3,0, Tmax values below 440ºC and Hydrocarbon Production Index inferior to 0,2. According to the organic facies data, La Luna Formation deposited in a marine environment with facies from disoxic-anoxic distal shelf and suboxic-oxic distal basin; there was kerogen of excellent quality, and its quantity was adequate for the generation of oil.

scholarly journals Upper Cretaceous and Tertiary stratigraphy on the Tuktoyaktuk Peninsula, Northwest Territories

2008 ◽  
Author(s):  
J Dixon ◽  
D H McNeil
Keyword(s):  
Northwest Territories ◽  
Upper Cretaceous

scholarly journals Organic geochemistry of the sedimentary basins of New Zealand. Part III. A biomarker correlation of three petroleum seeps and some rock bitumens from the East Coast of the North Island

1988 ◽  
Vol 18 (2) ◽  
pp. 225-243 ◽  
Author(s):  
Roderick J. Weston ◽  
Zofia Czochanska ◽  
Carolyn M. Sheppard ◽  
Anthony D. Woolhouse ◽  
Richard A. Cook
Keyword(s):  
New Zealand ◽  
East Coast ◽  
Organic Geochemistry ◽  
Sedimentary Basins ◽  
The North
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