基于重磁资料研究贵州省深部构造特征
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摘要
贵州省在大地构造位置上属于羌塘—扬子—华南板块下的扬子陆块,受不同构造旋回期的发展演化控制,早期地质构造被掩盖,而研究深部构造有利于构造单元划分、成矿作用等研究.本文利用区域重磁资料,结合其他地质资料,利用优选向上延拓分离不同尺度重磁异常,并对不同尺度重磁异常进行归一化总水平导数垂向导数处理,提取线性构造信息,分析区内主要断裂构造特征,进行定性分析;根据分离出的大尺度重磁异常反演研究区莫霍面、居里面起伏特征,莫霍面起伏介于34～46 km之间,总体上具有西高东低的特征;居里面深度介于22～28.5 km之间,西部以坳陷区为主,东部以隆起区为主,以区内两条深大断裂为界,深部构造具有南北分带、东西分块的特征,反映出贵州省上扬子地块与江南造山带两个三级构造分区的深部构造特征差异.
Guizhou locates in Yangtze block of Qiangtang-Yangtze-South China plates, and its early geological structure was concealed due to the development of different tectonic cycles, and the study of deep structure is conducive to the research of tectonic unit division and mineralization. Based on gravity and magnetic data, combing with other geology data, this paper utilizes preferential upward continuation to separate different-scale gravity and magnetic anomaly, and calculates the normalized vertical derivative of the total horizontal derivative of different-scale gravity and magnetic anomaly to extract linear structure information, then analyzes the main faults structure feature and develops qualitative analysis. Utilizing the separated large-scale anomaly to invert the depth of Moho and Curie, the result shows that the depth of Moho ranges from 34 km to 46 km with high value in the western and low value in the eastern; the depth of Curie ranges from 22 km to 28.5 km with depression areas in the western and uplift area in the eastern, and taking two deep faults as the boundary, the deep structure of Guizhou has the feature of zones distributed along north-south and blocks distributed along east-west, and also reflects the deep structure feature differences between the upper Yangtze Block and Jiangnanorogenic zone.
Guizhou locates in Yangtze block of Qiangtang-Yangtze-South China plates, and its early geological structure was concealed due to the development of different tectonic cycles, and the study of deep structure is conducive to the research of tectonic unit division and mineralization. Based on gravity and magnetic data, combing with other geology data, this paper utilizes preferential upward continuation to separate different-scale gravity and magnetic anomaly, and calculates the normalized vertical derivative of the total horizontal derivative of different-scale gravity and magnetic anomaly to extract linear structure information, then analyzes the main faults structure feature and develops qualitative analysis. Utilizing the separated large-scale anomaly to invert the depth of Moho and Curie, the result shows that the depth of Moho ranges from 34 km to 46 km with high value in the western and low value in the eastern; the depth of Curie ranges from 22 km to 28.5 km with depression areas in the western and uplift area in the eastern, and taking two deep faults as the boundary, the deep structure of Guizhou has the feature of zones distributed along north-south and blocks distributed along east-west, and also reflects the deep structure feature differences between the upper Yangtze Block and Jiangnanorogenic zone.
引文
Chai Y P,Jia J J.1990.Parker's formulas in different forms and their applications to oil gravity survey[J].Oil Geophysical Prospecting (in Chinese),25(3):321-332.
Dai C G,Qin S R,Chen J S,et al.2013.Characteristics of Deep Concealed Faults in Guizhou[J].Geological Science and Technology Information (in Chinese),32(6):1- 6,13.
Dai C G,Wang X H,Chen J S,et al.2017.The Regional Geology of China·Guizhou Province[M].Geological Publish House.
Fan X F.1999.Discussion on the Regional Geological Tectonic Framework of Guizhou Based on 1：500000 Gravity Anomaly[J].Guizhou Geology (in Chinese),16(3):195-198.
Fan X F.2004.Discussion on Deep-seated Geological Structure in the Area of Weining by Gravity anomaly[J].Guizhou Geology (in Chinese),21(3):152-155.
Feng R.1986.A computation method of potential field with three-dimensional density and magnetization distributions[J].Chinese Journal of Geophysics (in Chinese),29(4):399- 406.
Feng Y T,Zhao Z H,Zhao P R,et al.2007.Basement Structure and Fault Characteristics in Qianzhong Uplift and its Circumferential Areas[J].Journal of Oil and Gas Technology (in Chinese),29(3):35-38.
Ke X P,Wang Y,Xu H Z,et al.2006a.Interface depths inversion of potential field data with variable density model[J].Progress in Geophysics (in Chinese),21(3):825-829,doi:10.3969/j.issn.1004-2903.2006.03.021.
Ke X P,Wang Y,Xu H Z,et al.2006b.Moho depths inversion of Qinghai-Tibet Plateau with variable density model[J].Geomatics and Information Science of Wuhan University (in Chinese),31(4):289-292.
Meng Xiaohong,Guo Lianghui,Chen Zhaoxi,et al.2009.A method for gravity anomaly separation based on preferential continuation and its application[J].Applied Geophysics,6(3):217-225.
Pwalowski R S.1995.Preferential continuation for potential-field anomaly enhancement[J].Geophysics,60(2):390-398.
Wang L.2007.Distribution Characteristics of Gravity anomaly with a scale of 1 to 200000 and New Information Exposed on Regional Geologic Structure in Guizhou[J].Guizhou Geology (in Chinese),24(1):64- 69.
Wang L,Zhang Y W,Liu S G.2009a.The application of regional gravity and magnetic data to delineating intrusivie bodies and local geological structures in Guizhou Province[J].Geophysical & Geochemical Exploration (in Chinese),33(3):245-249,255.
Wang L,Zhang Y W,Liu S G.2009b.The division of the gravity and magnetic anomalies and the distribution of regional metallogenic belts in Guizhou Province[J].Geophysical & Geochemical Exploration (in Chinese),33(5):487- 492.
Wang Q S,Teng J W,Zhang Y Q,et al.2016.Discussion on the gravity anomaly and deep crustal structure of an 1800 km long profile crossing Shanxi,Chongqing,Guizhou and Guangxi[J].Chinese Journal of Geophysics (in Chinese),59(11):4139- 4152,doi:10.6038/cjg20161117.
Wang W Y,Pan Z S.1993.Fast solution of forward and inverse problems for gravity field in a dual interface model[J].Geophysical Prospecting for Petroleum (in Chinese),32(2):81-87.
Wang W Y,Pan Y,Qiu Z Y.2009.A new edge recognition technology based on the normalized vertical derivative of the total horizontal derivative for potential field data[J].Applied Geophysics,6(3):226-233.
Wu K B,Zeng G Q,Chen G X,et al.2016.Deep structural features of Guizhou revealed by Bouguer gravity anomaly[J].Geological Science and Technology Information (in Chinese),35(1):190-199.
Xiong S Q,Yang H,Ding Y Y,et al.2016.Characteristics of Chinese continent Curie point isotherm[J].Chinese Journal of Geophysics (in Chinese),59(10):3604-3617,doi:10.6038/cjg20161008.
Yin H,Zhou J X,Zhang Y J,et al.2015.Subdivision and fault identification of the magnetic anomaly map of China mainland,offshore and adjacent areas[J].Progress in Geophysics (in Chinese),30(4):1526-1534,doi:10.6038/pg20150406.
Zhang M H,Qiao J H,Lei S M,et al.2015.Bouguer anomaly compilcation study of China and the adjacent regions[J].Progress in Geophysics (in Chinese),30(3):1085-1097,doi:10.6038/pg20150312.
柴玉璞,贾继军.1990.Parker公式的一系列推广及其在石油重力勘探中的应用前景[J].石油地球物理勘探,25(3):321-332.
戴传固,秦守荣,陈建书,等.2013.试论贵州深部隐伏断裂特征[J].地质科技情报,32(6):1- 6,13.
戴传固,王雪华,陈建书,等.2017.中国区域地质志·贵州志[M].地质出版社.
范祥发.1999.从1：50万重力异常探讨贵州省区域地质构造格架[J].贵州地质,16(3):195-198.
范祥发.2004.从重力异常探讨威宁地区深部地质构造[J].贵州地质,21(3):152-155.
冯锐.1986.三维物性分布的位场计算[J].地球物理学报,29(4):399- 406.
封永泰,赵泽恒,赵培荣,等.2007.黔中隆起及周缘基底结构、断裂特征[J].石油天然气学报,29(3):35-38.
柯小平,王勇,许厚泽.2006a.基于变密度模型的位场界面反演[J].地球物理学进展,21(3):825-829,doi:10.3969/j.issn.1004-2903.2006.03.021.
柯小平,王勇,许厚泽.2006b.用变密度模型反演青藏高原的莫霍面深度[J].武汉大学学报·信息科学版,31(4):289-292.
王亮.2007.贵州1：20万重力异常分布特征与透露的区域地质构造新信息[J].贵州地质,24(1):64- 69.
王亮,张应文,刘盛光.2009a.区域重磁资料圈定贵州境内侵入岩体及局部地质构造[J].物探与化探,33(3):245-249,255.
王亮,张应文,刘盛光.2009b.贵州重磁异常分区特征与区域成矿区(带)分布特色[J].物探与化探,33(5):487- 492.
王谦身,腾吉文,张永谦,等.2016.陕渝黔桂1800 km超长探测剖面重力异常场特征及深部地壳结构探榷[J].地球物理学报,59(11):4139- 4152,doi:10.6038/cjg20161117.
王万银,潘作枢.1993.双界面模型重力场快速正反演问题[J].石油物探,32(2):81-87.
吴开彬,曾广乾,陈国雄,等.2016.布格重力异常揭示的贵州深部构造特征[J].地质科技情报,35(1):190-199.
熊盛青,杨海,丁燕云,等.2016.中国陆域居里等温面深度特征[J].地球物理学报,59(10):3604-3617,doi:10.6038/cjg20161008.
尹航,周坚鑫,张永军,等.2015.中国海陆磁力异常图磁场分区及断裂划分[J].地球物理学进展,30(4):1526-1534,doi:10.6038/pg20150406.
张明华,乔计花,雷受旻,等.2015.中国海陆及邻域布格重力异常编图研究[J].地球物理学进展,30(3):1085-1097,doi:10.6038/pg20150312.
Dai C G,Qin S R,Chen J S,et al.2013.Characteristics of Deep Concealed Faults in Guizhou[J].Geological Science and Technology Information (in Chinese),32(6):1- 6,13.
Dai C G,Wang X H,Chen J S,et al.2017.The Regional Geology of China·Guizhou Province[M].Geological Publish House.
Fan X F.1999.Discussion on the Regional Geological Tectonic Framework of Guizhou Based on 1：500000 Gravity Anomaly[J].Guizhou Geology (in Chinese),16(3):195-198.
Fan X F.2004.Discussion on Deep-seated Geological Structure in the Area of Weining by Gravity anomaly[J].Guizhou Geology (in Chinese),21(3):152-155.
Feng R.1986.A computation method of potential field with three-dimensional density and magnetization distributions[J].Chinese Journal of Geophysics (in Chinese),29(4):399- 406.
Feng Y T,Zhao Z H,Zhao P R,et al.2007.Basement Structure and Fault Characteristics in Qianzhong Uplift and its Circumferential Areas[J].Journal of Oil and Gas Technology (in Chinese),29(3):35-38.
Ke X P,Wang Y,Xu H Z,et al.2006a.Interface depths inversion of potential field data with variable density model[J].Progress in Geophysics (in Chinese),21(3):825-829,doi:10.3969/j.issn.1004-2903.2006.03.021.
Ke X P,Wang Y,Xu H Z,et al.2006b.Moho depths inversion of Qinghai-Tibet Plateau with variable density model[J].Geomatics and Information Science of Wuhan University (in Chinese),31(4):289-292.
Meng Xiaohong,Guo Lianghui,Chen Zhaoxi,et al.2009.A method for gravity anomaly separation based on preferential continuation and its application[J].Applied Geophysics,6(3):217-225.
Pwalowski R S.1995.Preferential continuation for potential-field anomaly enhancement[J].Geophysics,60(2):390-398.
Wang L.2007.Distribution Characteristics of Gravity anomaly with a scale of 1 to 200000 and New Information Exposed on Regional Geologic Structure in Guizhou[J].Guizhou Geology (in Chinese),24(1):64- 69.
Wang L,Zhang Y W,Liu S G.2009a.The application of regional gravity and magnetic data to delineating intrusivie bodies and local geological structures in Guizhou Province[J].Geophysical & Geochemical Exploration (in Chinese),33(3):245-249,255.
Wang L,Zhang Y W,Liu S G.2009b.The division of the gravity and magnetic anomalies and the distribution of regional metallogenic belts in Guizhou Province[J].Geophysical & Geochemical Exploration (in Chinese),33(5):487- 492.
Wang Q S,Teng J W,Zhang Y Q,et al.2016.Discussion on the gravity anomaly and deep crustal structure of an 1800 km long profile crossing Shanxi,Chongqing,Guizhou and Guangxi[J].Chinese Journal of Geophysics (in Chinese),59(11):4139- 4152,doi:10.6038/cjg20161117.
Wang W Y,Pan Z S.1993.Fast solution of forward and inverse problems for gravity field in a dual interface model[J].Geophysical Prospecting for Petroleum (in Chinese),32(2):81-87.
Wang W Y,Pan Y,Qiu Z Y.2009.A new edge recognition technology based on the normalized vertical derivative of the total horizontal derivative for potential field data[J].Applied Geophysics,6(3):226-233.
Wu K B,Zeng G Q,Chen G X,et al.2016.Deep structural features of Guizhou revealed by Bouguer gravity anomaly[J].Geological Science and Technology Information (in Chinese),35(1):190-199.
Xiong S Q,Yang H,Ding Y Y,et al.2016.Characteristics of Chinese continent Curie point isotherm[J].Chinese Journal of Geophysics (in Chinese),59(10):3604-3617,doi:10.6038/cjg20161008.
Yin H,Zhou J X,Zhang Y J,et al.2015.Subdivision and fault identification of the magnetic anomaly map of China mainland,offshore and adjacent areas[J].Progress in Geophysics (in Chinese),30(4):1526-1534,doi:10.6038/pg20150406.
Zhang M H,Qiao J H,Lei S M,et al.2015.Bouguer anomaly compilcation study of China and the adjacent regions[J].Progress in Geophysics (in Chinese),30(3):1085-1097,doi:10.6038/pg20150312.
柴玉璞,贾继军.1990.Parker公式的一系列推广及其在石油重力勘探中的应用前景[J].石油地球物理勘探,25(3):321-332.
戴传固,秦守荣,陈建书,等.2013.试论贵州深部隐伏断裂特征[J].地质科技情报,32(6):1- 6,13.
戴传固,王雪华,陈建书,等.2017.中国区域地质志·贵州志[M].地质出版社.
范祥发.1999.从1：50万重力异常探讨贵州省区域地质构造格架[J].贵州地质,16(3):195-198.
范祥发.2004.从重力异常探讨威宁地区深部地质构造[J].贵州地质,21(3):152-155.
冯锐.1986.三维物性分布的位场计算[J].地球物理学报,29(4):399- 406.
封永泰,赵泽恒,赵培荣,等.2007.黔中隆起及周缘基底结构、断裂特征[J].石油天然气学报,29(3):35-38.
柯小平,王勇,许厚泽.2006a.基于变密度模型的位场界面反演[J].地球物理学进展,21(3):825-829,doi:10.3969/j.issn.1004-2903.2006.03.021.
柯小平,王勇,许厚泽.2006b.用变密度模型反演青藏高原的莫霍面深度[J].武汉大学学报·信息科学版,31(4):289-292.
王亮.2007.贵州1：20万重力异常分布特征与透露的区域地质构造新信息[J].贵州地质,24(1):64- 69.
王亮,张应文,刘盛光.2009a.区域重磁资料圈定贵州境内侵入岩体及局部地质构造[J].物探与化探,33(3):245-249,255.
王亮,张应文,刘盛光.2009b.贵州重磁异常分区特征与区域成矿区(带)分布特色[J].物探与化探,33(5):487- 492.
王谦身,腾吉文,张永谦,等.2016.陕渝黔桂1800 km超长探测剖面重力异常场特征及深部地壳结构探榷[J].地球物理学报,59(11):4139- 4152,doi:10.6038/cjg20161117.
王万银,潘作枢.1993.双界面模型重力场快速正反演问题[J].石油物探,32(2):81-87.
吴开彬,曾广乾,陈国雄,等.2016.布格重力异常揭示的贵州深部构造特征[J].地质科技情报,35(1):190-199.
熊盛青,杨海,丁燕云,等.2016.中国陆域居里等温面深度特征[J].地球物理学报,59(10):3604-3617,doi:10.6038/cjg20161008.
尹航,周坚鑫,张永军,等.2015.中国海陆磁力异常图磁场分区及断裂划分[J].地球物理学进展,30(4):1526-1534,doi:10.6038/pg20150406.
张明华,乔计花,雷受旻,等.2015.中国海陆及邻域布格重力异常编图研究[J].地球物理学进展,30(3):1085-1097,doi:10.6038/pg20150312.
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