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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.1
- 수록면
- 13 - 26 (14page)
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The Neoproterozoic successions in the Aksu region, NW China, which lies unconformably on the Precambrian Aksu Group basement, comprises the Qiaoenbrak, Yuermeinak, Sugetbrak, and Chigebrak formations (from bottom to top). The two lowermost units include two distinct glacial diamictites, which indicate distinct episodes of glaciations. We report the major and trace element (including rare earth element) data for the Qiaoenbrak, Yuermeinak, and Sugetbrak formations to identify the paleoclimatic perturbations. The chemical index of alteration (CIA) values show variations from Qiaoenbrak to Yuermeinak, then Sugetbrak formations. The diamictites have relatively lower chemical index of alteration values (45.23–59.64) than inter-, post- and non-glacial sediments (48.28–66.96). This result supported the condition that the diamictites underwent relatively weak chemical weathering from a dry-cold sedimentary environment, which is associated with the sedimentary facies description. The lower Neoproterozoic successions recoded at least two glaciations, one is Qiaoenbrak glaciation and the other is Yuermeinak glaciation.
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참고문헌 (62)
참고문헌 신청
Bahlburg, H. / 2011 / The Geological Record of Neoproterozoic Glaciations / Geological Society :81~92
Busfield, M.E. / 2014 / Sequencing the Sturtian icehouse: dynamic ice behaviour in South Australia / Journal of the Geological Society 171:443~456
Chen, Y. / 2004 / First mid-Neoproterozoic paleomagnetic results from the Tarim Basin(NW China)and their geodynamic implication / Precambrian Research 133:271~281
Colin, C. / 1998 / Magnetic properties of sediments in the Bay of Bengal and the Andaman Sea : impact of rapid North Atlantic Ocean climatic events on the strength of the Indian monsoon / Earth and Planetary Science Letters 160:623~635
Cox, R. / 1995 / The Influence of Sediment Recycling and Basement Composition on Evolution of Mudrock Chemistry in the Southwestern United-States / Geochimica et Cosmochimica Acta 59:2919~2940
Busfield, M.E. / 2014 / Sequencing the Sturtian icehouse: dynamic ice behaviour in South Australia / Journal of the Geological Society 171:443~456
Chen, Y. / 2004 / First mid-Neoproterozoic paleomagnetic results from the Tarim Basin(NW China)and their geodynamic implication / Precambrian Research 133:271~281
Colin, C. / 1998 / Magnetic properties of sediments in the Bay of Bengal and the Andaman Sea : impact of rapid North Atlantic Ocean climatic events on the strength of the Indian monsoon / Earth and Planetary Science Letters 160:623~635
Cox, R. / 1995 / The Influence of Sediment Recycling and Basement Composition on Evolution of Mudrock Chemistry in the Southwestern United-States / Geochimica et Cosmochimica Acta 59:2919~2940
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