The role of decarbonization and structure in the Callie gold deposit, Tanami Region of northern Australia

2006 ◽  
Vol 42 (1-2) ◽  
pp. 65-87 ◽  
Author(s):  
Nicholas C. Williams
Keyword(s):  
Gold Deposit ◽  
Northern Australia ◽  
Tanami Region

The role of porphyry–related skarns in the Chating porphyry copper and gold deposit, eastern China

2021 ◽  
pp. 104096
Author(s):  
Qingling Xiao ◽  
Taofa Zhou ◽  
Pete Hollings ◽  
Shiwei Wang ◽  
Jing Liu ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Porphyry Copper ◽  
Eastern China

scholarly journals Influence of the 2015–2016 El Niño on the record-breaking mangrove dieback along northern Australia coast

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
S. Abhik ◽  
Pandora Hope ◽  
Harry H. Hendon ◽  
Lindsay B. Hutley ◽  
Stephanie Johnson ◽  
...  
Keyword(s):  
El Niño ◽  
El Nino ◽  
Southern Oscillation ◽  
Low Frequency ◽  
Multiple Linear Regression Model ◽  
Frequency Component ◽  
Enso Cycle ◽  
Northern Australia ◽  
Climate Conditions

AbstractThis study investigates the underlying climate processes behind the largest recorded mangrove dieback event along the Gulf of Carpentaria coast in northern Australia in late 2015. Using satellite-derived fractional canopy cover (FCC), variation of the mangrove canopies during recent decades are studied, including a severe dieback during 2015–2016. The relationship between mangrove FCC and climate conditions is examined with a focus on the possible role of the 2015–2016 El Niño in altering favorable conditions sustaining the mangroves. The mangrove FCC is shown to be coherent with the low-frequency component of sea level height (SLH) variation related to the El Niño Southern Oscillation (ENSO) cycle in the equatorial Pacific. The SLH drop associated with the 2015–2016 El Niño is identified to be the crucial factor leading to the dieback event. A stronger SLH drop occurred during austral autumn and winter, when the SLH anomalies were about 12% stronger than the previous very strong El Niño events. The persistent SLH drop occurred in the dry season of the year when SLH was seasonally at its lowest, so potentially exposed the mangroves to unprecedented hostile conditions. The influence of other key climate factors is also discussed, and a multiple linear regression model is developed to understand the combined role of the important climate variables on the mangrove FCC variation.

Fluid–rock interactions and the role of late Hercynian aplite intrusion in the genesis of the Castromil gold deposit, northern Portugal

2003 ◽  
Vol 194 (1-3) ◽  
pp. 201-224 ◽  
Author(s):  
J Vallance ◽  
M Cathelineau ◽  
M.C Boiron ◽  
S Fourcade ◽  
T.J Shepherd ◽  
...  
Keyword(s):  
Gold Deposit ◽  
Northern Portugal

Introduced and native grass-derived smoke effects on Cymbopogon obtectus germination

2014 ◽  
Vol 62 (6) ◽  
pp. 465 ◽  
Author(s):  
Paul R. Williams ◽  
Eleanor M. Collins ◽  
Mick Blackman ◽  
Clare Blackman ◽  
Jackie McLeod ◽  
...  
Keyword(s):  
Native Species ◽  
Native Plants ◽  
First Record ◽  
Northern Australia ◽  
Untreated Seed ◽  
Native Grass ◽  
Buffel Grass ◽  
Lemon Grass ◽  
Germination Cues

Introduced grasses, such as buffel, alter the dynamics of grassy ecosystems by replacing native species and influencing recruitment. Several different smoke-derived chemicals are separately responsible for the promotion and inhibition of germination of various plant species. We tested whether smoke derived from the introduced buffel grass (Cenchrus ciliaris) produced the same density of germination as provided by smoke derived from a native spinifex grass (Triodia brizoides). Smoke from both spinifex and buffel grass significantly enhanced the germination of a native lemon grass (Cymbopogon obtectus) in comparison to untreated seed, reflecting the significant role of fire in woodlands across northern Australia. This is the first record of smoke-promoted germination in a species of Cymbopogon. However, smoke from the exotic buffel grass provided the same level of germination as that from the native spinifex, suggesting similarity in smoke chemicals involved. Further research is required to test the effect of buffel smoke on the germination of other species and whether exotics such as buffel grass provide the same temperature profile in the topsoil as does spinifex, and therefore equivalent germination cues to heat-shock responsive native plants.

scholarly journals The Influence of 2015-16 El Niño On the Record-Breaking Mangrove Dieback Along Northern Australia Coast

2021 ◽  
Author(s):  
S. Abhik ◽  
Pandora Hope ◽  
Harry H. Hendon ◽  
Lindsay B. Hutley ◽  
Stephanie Johnson ◽  
...  
Keyword(s):  
Sea Level ◽  
El Niño ◽  
El Nino ◽  
Southern Oscillation ◽  
Multiple Linear Regression Model ◽  
Enso Cycle ◽  
Northern Australia ◽  
Climate Conditions ◽  
Level Height

Abstract This study investigates the underlying climate processes behind the largest recorded mangrove dieback event along the Gulf of Carpentaria coast in northern Australia in late 2015. Capitalizing on the satellite observation-based mangrove green-fraction dataset, variation of the mangroves during recent decades are studied, including their dieback during 2015. The relationship between mangrove greenness and the climate conditions is examined using available observations and by exploring the possible role of the mega 2015-16 El Niño in altering the favorable conditions for the mangroves. The mangrove greenness is shown to be coherent with the low-frequency component of sea-level height variation related to the El Niño southern oscillation (ENSO) cycle in the equatorial Pacific. The sea-level drop associated with the 2015-16 El Niño is identified to be the crucial factor leading to the dieback event. A stronger sea-level drop occurred during austral autumn and winter, when the anomalies were more than 12% greater than the previous very strong El Niño events. The persistent drop in sea-level height occurred in the dry season of the year when sea-level was seasonally at its lowest, so potentially exposed the mangroves to unprecedented hostile conditions. The influence of other key climate factors is also discussed, and a multiple linear regression model is developed to understand the combined role of the important climate variables on the mangrove greenness variation.

scholarly journals Designs for the future: the role of sustainable irrigation in northern Australia

2008 ◽  
Author(s):  
J. K. Camkin ◽  
K. L. Bristow ◽  
C. Petheram ◽  
Z. Paydar ◽  
F. J. Cook ◽  
...  
Keyword(s):  
Northern Australia ◽  
The Future ◽  
Sustainable Irrigation

Boundaries, Relationality, and Style Provinces in Australian Rock Art

2021 ◽  
Author(s):  
Madeleine Kelly ◽  
Liam M. Brady
Keyword(s):  
Spatial Distribution ◽  
Rock Art ◽  
Formal Analysis ◽  
Social Boundaries ◽  
Northern Australia ◽  
The Core ◽  
Key Indicator ◽  
Art Research ◽  
Similarity And Difference

Identifying style provinces is a popular topic of enquiry in Australian rock art research. At the core of these studies is the focus on the style or manner of depiction of motifs as a key indicator for determining patterns of motif similarity and difference, and their corresponding spatial distribution. In identifying spatial continuities and discontinuities based on a formal analysis of rock art motifs fixed in place, researchers sometimes limit their ability to understand the relational dimensions associated with past and present graphic systems more broadly. This chapter reviews and critiques the formal, style-based methods of delineating discontinuities in rock art as boundaries and uses Nancy Williams’s work on Yolngu boundaries as a framework to further build on research into spatial discontinuities in rock art as flexible, intersecting, and fluid. In doing so, the authors also draw attention to the role of relational understandings and decorative portable objects in characterizing intersecting style-based discontinuities. Using two case studies from northern Australia, they demonstrate how the spatial and social boundaries expressed in rock art are often much more complex than originally envisaged.

Flake-thrust structures and their role in gold deposits formation within Trans-Baikal region

2021 ◽  
pp. 52-61
Author(s):  
Vladimir Salikhov
Keyword(s):  
Gold Deposit ◽  
Significant Role ◽  
Baikal Region ◽  
Gold Mineralization ◽  
Gold Deposits ◽  
Low Grade

The significant role of tectonometamorphic gold mineralization style thrust structures in the formation of some gold deposits (Kultuminskoye, Andryushkinskoye, Sepchugur, etc.) within Trans-Baikal region is shown. Thrust structures may present certain prospects for major relatively low-grade gold deposit prospecting, which requires a reassessment of some deposits.

Sign in / Sign up

Export Citation Format

Share Document