Geological interpretation of Bouguer gravity and aeromagnetic data from the Gobi-desert covered area, Eastern Tianshan, China: Implications for porphyry Cu-Mo polymetallic deposits exploration
Geological interpretation of Bouguer gravity and aeromagnetic data from the Gobi-desert covered area, Eastern Tianshan, China: Implications for porphyry Cu-Mo polymetallic deposits exploration
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中国东天山戈壁沙漠覆盖区布格重力和航磁数据的地质解释：对斑岩铜钼多金属矿床勘探的启示
DOI：
10.1016/j.oregeorev.2016.08.034
复制
发表时间：
2017
影响因子：
3.3
通讯作者：
Zhenghai Wang
中科院分区：
文献类型：
--
作者：
Fan Xiao;Zhenghai Wang
本文利用布格重磁资料，对戈壁沙漠覆盖的东天山带晚石炭世-晚二叠世斑岩型铜钼多金属成矿带附近的地质矿产进行了研究。区域尺度航磁数据的还原至极（RTP）转换表明，斑岩铜钼存款矿床位于一组磁异常高点内，这些异常高点叠加在大致沿着壳尺度康古尔塔格-黄山断裂的北东向磁梯度带上。布格重磁资料向上延拓10 km的转换结果表明，已知斑岩型铜钼多金属矿床位于重磁异常高点的两侧。这些异常在空间上与晚石炭世-晚二叠世火成岩相关，在土屋-延东成矿区集中在与斑岩铜矿系统成因相关的花岗闪长岩上。为了最大限度地减少解释的歧义，一个有用的方法，即相关分析（CA）的基础上的相关系数（CC）的重磁数据被用来分离的正相关和负相关的异常特征。应用CA程序对布格重力和RTP转换的航磁数据进行10 km向上延拓转换，以映射可能与斑岩型铜钼多金属成矿有关的深源磁化和密度差异常。在大南湖-头苏泉弧南缘发现5个CC正异常。这些异常带反映了东天山北部地区晚石炭世-晚二叠世岩浆岩带的存在，为进一步发现晚石炭世-晚二叠世斑岩铜矿系统提供了有利条件。
In this study, Bouguer gravity and aeromagnetic data have been used to better understand the geology and mineral resources near the late Carboniferous-late Permian porphyry Cu-Mo polymetallic mineralization in the Chinese Eastern Tianshan belt, which is extensively covered by Gobi-desert. The reduced-to-pole (RTP) transformation of regional-scale aeromagnetic data shows that the porphyry Cu-Mo deposit is within a cluster of magnetic anomaly highs that overprint on a northeast trending magnetic gradient belt generally along the crustal-scale Kanguertag-Huangshan fault. The 10 km upward continuation transformation of both Bouguer gravity and aeromagnetic data indicates that the known porphyry Cu-Mo polymetallic deposits are located on the flanks of prominent gravity and magnetic anomaly highs. These anomalies are spatially correlated with the late Carboniferous-late Permian igneous rocks and in the Tuwu-Yandong mineralization district are centered over the granodiorite rocks genetically related to porphyry copper systems. In order to minimize interpretational ambiguities, a useful approach that is correlation analysis (CA) based on correlation coefficient (CC) given by gravity and magnetic data was employed to separate positively and negatively correlated anomalies features. The CA procedure is applied to 10 km upward continuation transformation of both Bouguer gravity and RTP transformed aeromagnetic data for mapping correlative magnetization and density contrast anomalies from deep sources, which may be associated with the porphyry Cu-Mo polymetallic mineralization. Five prominent CC positive anomalies have been found in the southern margin of Dananhu-Tousuquan arc. Those anomalies zones could be interpreted to reflect a late Carboniferous-late Permian magmatic belt that is favorable for additional discoveries of late Carboniferous to late Permian porphyry copper systems in north region of Eastern Tianshan.
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DOI：
--
发表时间：
2013
期刊：
The Journal of Geology
影响因子：
--
作者：
Zeng Ka
通讯作者：
Zeng Ka
影响因子：
3.5
作者：
Taofa Zhou;F. Yuan;Yu Fan;Dayu Zhang;D. Cooke;Guochun Zhao
通讯作者：
Taofa Zhou;F. Yuan;Yu Fan;Dayu Zhang;D. Cooke;Guochun Zhao
DOI：
10.1007/978-94-007-0406-0
发表时间：
2011-12
期刊：
Bouguer Gravity Regional and Residual Separation: Application to Geology and Environment
影响因子：
--
作者：
K. Mallick;A. Vasanthi;K. K. Sharma-K.
通讯作者：
K. Mallick;A. Vasanthi;K. K. Sharma-K.
影响因子：
3.3
作者：
Chunming Han;W. Xiao;Guochun Zhao;J. Mao;Jianmin Yang;Zhiliang Wang;Zhen Yan;Q. Mao
通讯作者：
Chunming Han;W. Xiao;Guochun Zhao;J. Mao;Jianmin Yang;Zhiliang Wang;Zhen Yan;Q. Mao
DOI：
--
发表时间：
2005
期刊：
Acta Geological Sinica
影响因子：
--
作者：
Chen Fuwen
通讯作者：
Chen Fuwen