Provenance evolution of the Paleoproterozoic metasedimentary cover sequences in northern Fennoscandia: Age distribution, geochemistry, and zircon morphology

2019 ◽  
Vol 331 ◽  
pp. 105364 ◽  
Author(s):  
J. Köykkä ◽  
R. Lahtinen ◽  
H. Huhma
Keyword(s):  
Age Distribution ◽  
Northern Fennoscandia ◽  
Zircon Morphology ◽  
Provenance Evolution

scholarly journals Morphology of Detrital Zircon as a Fingerprint to Trace Sediment Provenance: Case Study of the Yangtze Delta

Minerals ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 438 ◽  
Author(s):  
Wei Yue ◽  
Xiyuan Yue ◽  
Lingmin Zhang ◽  
Xianbin Liu ◽  
Jian Song
Keyword(s):  
Detrital Zircon ◽  
Sediment Provenance ◽  
The Tibetan Plateau ◽  
Yangtze Delta ◽  
Marginal Seas ◽  
Source To Sink ◽  
Regional Tectonic ◽  
Yangtze Basin ◽  
Zircon Morphology ◽  
Provenance Evolution

Deltaic areas and marginal seas are important archives that document information on regional tectonic movement, sea level rise, river evolution, and climate change. Here, sediment samples from boreholes of the Yangtze Delta and the modern Yangtze drainage were collected. A quantitative analysis of detrital zircon morphology was used to discuss the provenance evolution of the Yangtze Delta. This research demonstrated that a dramatic change in sediment provenance occurred in the transition from the Pliocene to Quaternary. Zircon grains in the Pliocene sediments featured euhedral crystals with large elongation (>3 accounted for 13.2%) and were closely matched to tributary samples in the Lower Yangtze (>3 accounted for 11.3%), suggesting sediment provenance from the proximal river basin. However, most detrital zircon grains of the Quaternary samples exhibited lower values of elongation and increased roundness (rounded grains were 9.4%), which was similar to those found in the modern Yangtze mainstream (rounded grains were 12.5%) and the middle tributaries (rounded grains were 7.0%). The decrease in zircon elongation and improvement of its roundness in the Quaternary strata implied that the Yangtze Delta received sediments of different provenance that originated from the Middle-Upper Yangtze basin due to the uplift of the Tibetan Plateau. Statistical analysis of detrital zircon morphology has proven useful for studying the source-to-sink of sediments.

Defects in Resin Transfer Molded Plaques Due to Resin Age Distribution During Mold Filling

1996 ◽  
Vol 11 (3) ◽  
pp. 284-290 ◽  
Author(s):  
N. S. Losure ◽  
K. Jayaraman ◽  
C. A. Petty
Keyword(s):  
Age Distribution ◽  
Mold Filling

Analysis of age distribution of advanced colorectal neoplasm in average-risk Chinese

2013 ◽  
Vol 32 (4) ◽  
pp. 368-373
Author(s):  
Rong LIANG ◽  
En-da YU ◽  
Wei ZHU ◽  
Jie GAO ◽  
Zhao-shen LI ◽  
...  
Keyword(s):  
Colorectal Neoplasm ◽  
Age Distribution ◽  
Average Risk

PROVENANCE EVOLUTION OF THE PALEO-HANJIAN RIVER IN THE NORTH SOUTH CHINA SEA

2013 ◽  
Vol 32 (4) ◽  
pp. 41-48 ◽  
Author(s):  
Xiangtao ZHANG ◽  
Liang CHEN ◽  
Qinghua SHE ◽  
Sufang ZHANG ◽  
Peijun QIAO ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
China Sea ◽  
The North ◽  
Provenance Evolution

Age Distribution as a Challenge to Development

1965 ◽  
Vol 70 (6) ◽  
pp. 659-668 ◽  
Author(s):  
Nathan Keyfitz
Keyword(s):  
Age Distribution

Cancer as a Scottish Problem

1968 ◽  
Vol 13 (10) ◽  
pp. 338-348
Author(s):  
A. J. Haddow
Keyword(s):  
Breast Cancer ◽  
Lung Cancer ◽  
Cause Of Death ◽  
Cancer Mortality ◽  
Time Lag ◽  
Age Distribution ◽  
Lung Cancer Mortality ◽  
Cervix Uteri ◽  
Hospital Treatment ◽  
Cancer Of The Lung

Cancer, responsible for about 1 death in 5 in Scotland, cost over £1 per head of population in 1965 and led to bed occupation of almost 2,000 bed years. Time lag (symptoms-doctor-hospital-treatment) is usuallv small. Age distribution is as in other European countries. Excluding accidents, cancer is the second most important cause of death in children. In relation to other countries Scotland's position is very poor and the lung cancer mortality in both sexes is the highest known. Lung cancer is the most important in males, breast cancer in females. Alimentary cancers come second in both sexes. In this century alimentary cancers increased till the thirties or forties and then declined. Cancers of pancreas, cervix uteri, ovary, prostate, kidney and bladder, together with leukaemia, have all increased. Cancer of the lung has increased elevenfold in women and fiftyfold in men. It now accounts for 9 to 12 per cent of all male deaths in cities and large towns

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