Discussion on the Relationship between Carbonate Magnetic Susceptibility and Sequence Stratigraphy in Middle-Upper Ordovician  in Aksu Area,Xinjiang

Geoscience ›› 2009, Vol. 23 ›› Issue (2): 229-237.

• Engineering Geology and Environmental Geology • Previous Articles Next Articles

Discussion on the Relationship between Carbonate Magnetic Susceptibility and Sequence Stratigraphy in Middle-Upper Ordovician in Aksu Area,Xinjiang

WU Zhen-jie ¹, YAO Jian-xin ¹, CHEN Liu-qin², LI Yan-jun ³, LIU Ping-hua ¹, WANG Ting-ting ²

1Institute of Geology, Chinese Academy of Geological Sciences, Beijing100037, China; 
2School of Earth Sciences and Resources, China University of Geosciences, Beijing100083, China;
3Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing100085, China

Received:2009-01-13 Revised:2009-03-17 Online:2009-04-20 Published:2011-12-21

Abstract

Abstract:

Based on measurement and statistical data of 185 Middle-Upper Ordovician carbonate samples, miciofacies analysis of carbonate and sequence stratigraphy research, relationship between carbonate magnetic susceptibility and sedimentary setting, sequence boundaries, parasequence (sets) have been discussed. Results show that normally rocks such as calcareous mudstone, nodular limestone, argillaceous limestone, which were formed at deep water level where energy was low, have relatively low value of magnetic susceptibility, while rocks such as oolite-containing calcarenite, oolitic limestone have high value of magnetic susceptibility, which were formed at shallow water where energy was high. Magnetic susceptibility decreases greatly across submerged sequence boundary in carbonate rocks. Magnetic susceptibility of upper units of parasequence (sets) are bigger than those of lower ones, with a shape of high-frequency oscillation.

Key words: Aksu area, Middle-Upper Ordovician, carbonate magnetic susceptibility, sequence stratigraphy

CLC Number:

WU Zhen-jie YAO Jian-xin CHEN Liu-qin LI Yan-jun LIU Ping-hua WANG Ting-ting. Discussion on the Relationship between Carbonate Magnetic Susceptibility and Sequence Stratigraphy in Middle-Upper Ordovician in Aksu Area,Xinjiang[J]. Geoscience, 2009, 23(2): 229-237.

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Discussion on the Relationship between Carbonate Magnetic Susceptibility and Sequence Stratigraphy in Middle-Upper Ordovician in Aksu Area,Xinjiang

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