Gravity and magnetic character of south-central Alaska: Constraints on geologic and tectonic interpretations, and implications for mineral exploration

2007 ◽  
pp. 593-622 ◽  
Author(s):  
Jonathan M.G. Glen ◽  
Jeanine Schmidt ◽  
Robert Morin
Keyword(s):  
Mineral Exploration ◽  
South Central ◽  
Gravity And Magnetic

Terrain Geochemistry Surveys, Permafrost Studies, and Arctic Limnology, District of Keewatin, N.W.T.: Implications for Water Quality Monitoring in the North

1987 ◽  
Vol 22 (4) ◽  
pp. 505-517
Author(s):  
Tom W.D. Edwards ◽  
R.A. Klassen ◽  
W.W. Shilts
Keyword(s):  
Water Quality ◽  
Lake Sediments ◽  
Mineral Exploration ◽  
Surface Water Quality ◽  
Water Quality Monitoring ◽  
Quality Monitoring ◽  
The North ◽  
South Central ◽  
Geochemical Variations ◽  
Arctic Limnology

Abstract Geochemical studies and surveys conducted by the Geological Survey of Canada have provided considerable information about the natural geochemical variations in glacial drift, lake sediments, and lake waters in south-central District of Keewatin. In addition to their intended contribution to mineral exploration, these activities yielded much basic background data that may be applied to the planning of water quality monitoring programs in the region. Studies of permafrost features, and arctic limnology have furnished knowledge about natural geomorphic and diagenetic processes that influence surface water quality. Cryoturbation, on land and in the shallow areas of lakes underlain by permafrost, plays a major role in the transfer of particulate and dissolved drift constituents to surface waters. In spite of the abundance of mineral detritus on shore, profundal lake sediments are typically highly diatomaceous and possess conspicuous oxic surface layers that likely have a strong capacity to sequester both nutrients and trace metals.

Late Wisconsinan glacial history in the Bonaparte Lake map area, south-central British Columbia: implications for glacial transport and mineral exploration1This article is one of a series of papers published in this Special Issue on the theme of New insights in Cordilleran Intermontane geoscience: reducing exploration risk in the mountain pine beetle-affected area, British Columbia.2Earth Sciences Sector Contribution Number: 20100093.

2011 ◽  
Vol 48 (6) ◽  
pp. 1091-1111 ◽  
Author(s):  
A. Plouffe ◽  
J.M. Bednarski ◽  
C.A. Huscroft ◽  
R.G. Anderson ◽  
S.J. McCuaig
Keyword(s):  
British Columbia ◽  
Mountain Pine Beetle ◽  
Mineral Exploration ◽  
Source Region ◽  
Mineralogical Composition ◽  
Glacial History ◽  
Ice Flow ◽  
Glacial Sediments ◽  
South Central ◽  
Late Wisconsinan

This study is centred on the Bonaparte Lake map area located in the southern Interior Plateau of south-central British Columbia. The reconstruction of the Late Wisconsinan glacial history of this part of the southern sector of the Cordilleran Ice Sheet incorporates (i) the analysis and interpretation of landforms of various scales, (ii) the sedimentology and stratigraphy of glacial sediments, and (iii) the geochemical and mineralogical composition of till and analysis of regional glacial dispersal of these components. The onset of the last glacial event was initiated by ice advancing westerly and southwesterly into the study area from an alpine source region located in the Cariboo Mountains. As glaciation intensified, ice from the Coast Mountains coalesced with the Cariboo Mountain ice over the Interior Plateau and developed into an ice divide around 52° north latitude, which resulted in ice flow to be diverted to a southerly direction over the study area. The two dominant ice-flow directions produced palimpsest dispersal that was measured by three tracers in till including thorianite grains and terbium concentrations in the heavy mineral fraction, and granitoid pebble percentage. The two main phases of ice flow identified within our study area have significant implications for mineral exploration that uses mineral tracing in glacial sediments, especially in the area underlain by the highly prospective Quesnel Terrane.

3D geologic model of Shizishan ore field constrained by gravity and magnetic interactive modeling: A case history

Geophysics ◽  
2013 ◽  
Vol 78 (1) ◽  
pp. B25-B35 ◽  
Author(s):  
Qingtian Lü ◽  
Guang Qi ◽  
Jiayong Yan
Keyword(s):  
3D Visualization ◽  
Mineral Exploration ◽  
3D Structure ◽  
Spatial Relations ◽  
3D Models ◽  
Magnetic Data ◽  
Gravity And Magnetic ◽  
Geologic Model ◽  
Gravity And Magnetic Data ◽  
Ore District

We performed a study on using an integrated geologic model in mineral exploration at depth. Shizishan ore field, in the western part of the Tongling ore district, Anhui Province in China, is well known for its polymetallic deposits and recent deep discovery of Dongguashan deposit at around 1000-m depth. Understanding the 3D structure and delineating the locations and variations of the intrusions and ore-controlling strata in the study area are essential for selecting deep mineral targets. A pilot 3D geologic model, covering an area of 11 × 16 km and extends to a depth of 3 km, has been constructed by interactive gravity and magnetic inversions to define the geometry, depth, and physical properties of geologic bodies at depths. The 3D visualization of the results assists in understanding the spatial relations between various intrusive units and the ore-bearing strata. The model has confirmed most previous knowledge, but also revealed new features of different folds and intrusions that are important for planning future exploration at large depths. Several deep targets have also been predicted by combining the conceptual mineralization model in the district with the 3D geologic model. Our study demonstrates the potential of using gravity and magnetic data with geologic constraints to build 3D models in structurally complex areas for the purpose of mineral exploration at depth and under cover.

scholarly journals Quality characteristics of Ilmenit minerals in the south central of Vietnam by SEM and QEMSCAN analysis

2020 ◽  
Vol 61 (1) ◽  
pp. 72-81
Author(s):  
Nguyen Huu Hiep ◽  
Andrew Carter ◽  
Dao Bui Din ◽  
Trinh The Luc ◽  
Ngo Thi Kim Chi ◽  
...  
Keyword(s):  
Mineral Exploration ◽  
Grain Structure ◽  
Heavy Minerals ◽  
The South ◽  
Central Coast ◽  
Erosion And Deposition ◽  
The North ◽  
South Central ◽  
Deposition Processes

Placer deposit along the South Central Coast of Viet Nam is formed by the enrichment of heavy minerals through a combination of transportation, weathering, erosion and deposition processes. Ilmenite placer forms continuously along the South Central Coast from local origin when the shoreline is far from the modern shoreline formed during the marine transgression process from the late Plestocene to Holocene. The morphological and localization characteristics of Ilmenite have been clarified on the distribution trend with SEM method combined with QEMSCAN. Meticulous research on Ilmenite's grain structure and chemical composition in the study area has shown a tendency to significantly enrich the quality of Ti placer according to the upward trend in the north-south direction. In the south, the Ilmenite placer has smaller particle size but better selective roundness and better quality than in the northern part of the study area. The enrichment of TiO2 content with increasing trend from North to South was observed due to the strong weathering process associated with ancient coastline which is very far away from current shoreline so heavy minerals are accumulates locally and light minerals are carried away. The southern region of the South Central Coast region is home to the highest gap between the ancient shoreline and the current coastline. This study has shown the trend of the quality distribution of Ilmenite as well as of other heavy minerals as the basis for future mineral exploration planning.

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