Characteristics of Cenozoic volcanic edifices in the Pingnan area, Xihu Sag
Significance Igneous rocks are well-developed in the southern Pinghu slope zone, Xihu Sag, East China Sea Shelf Basin. In this zone, the increased local geotemperature caused by magmatic activity produced significant impacts on the thermal evolution of source rocks and the formation of secondary por...
Saved in:
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Coal Geology & Exploration
2025-01-01
|
| Series: | Meitian dizhi yu kantan |
| Subjects: | |
| Online Access: | http://www.mtdzykt.com/article/doi/10.12363/issn.1001-1986.24.05.0324 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1823856625640800256 |
|---|---|
| author | Naiquan SUN Donghui JIANG Jie PAN Yang GAO Renhai PU Xinxu DONG |
| author_facet | Naiquan SUN Donghui JIANG Jie PAN Yang GAO Renhai PU Xinxu DONG |
| author_sort | Naiquan SUN |
| collection | DOAJ |
| description | Significance Igneous rocks are well-developed in the southern Pinghu slope zone, Xihu Sag, East China Sea Shelf Basin. In this zone, the increased local geotemperature caused by magmatic activity produced significant impacts on the thermal evolution of source rocks and the formation of secondary pores in sandstone reservoirs and also serves as a significant indicator of regional tectonic movements, thus holding great significance for understanding the regional geological history. Objective and Methods This study aims to determine the formation stages and distribution patterns of igneous rocks as the cap rocks in the southern Pinghu slope zone. Using previous study results and the data of adjacent areas, as well as 3D seismic data and related attributes, and data from drilling and logs, this study analyzed the types, corresponding strata, and distribution ranges of volcanic rocks in the southern Pinghu slope zone. Furthermore, the formation stages of igneous rocks in the slope zone were explored based on the stratigraphic chronology, the morphologies of volcanic edifices, and the contact relationship between volcanic edifices and surrounding rocks. Results and Conclusions The results indicate that the seismic facies of igneous rocks in the Pingnan area can be divided into volcanic vent facies, along with explosive, overflow, and intrusive facies, with mounded and shield volcanic edifices proving the most developed. The magmatic activity in the Xihu Sag can be divided into three stages. Specifically, magmatic activity during the regional Longjing Movement, occurring in the late Miocene, exhibits the highest intensity and widest influence range. Besides, local small-scale tectonic movements occurred in the late depositional stage of the Yuquan Formation and the early depositional stage of the Santan Formation, corresponding to weak magmatic activity with minimal impacts. The Pingnan area contains five lithologic, low-amplitude drape anticline/fault combination traps associated with magmatic activity. The results of this study will provide a reference for future hydrocarbon exploration and production in the southern Pinghu slope zone of the Xihu Sag. |
| format | Article |
| id | doaj-art-e1633ce1d3274697945269593a23b959 |
| institution | Kabale University |
| issn | 1001-1986 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Editorial Office of Coal Geology & Exploration |
| record_format | Article |
| series | Meitian dizhi yu kantan |
| spelling | doaj-art-e1633ce1d3274697945269593a23b9592025-02-12T07:20:18ZzhoEditorial Office of Coal Geology & ExplorationMeitian dizhi yu kantan1001-19862025-01-0153121522510.12363/issn.1001-1986.24.05.032424-05-0324sunnaiquanCharacteristics of Cenozoic volcanic edifices in the Pingnan area, Xihu SagNaiquan SUN0Donghui JIANG1Jie PAN2Yang GAO3Renhai PU4Xinxu DONG5School of Geological Engineering and Geomatics, Chang’an University, Xi’an 710054, ChinaShanghai Offshore Oil & Gas Company, SINOPEC, Shanghai 200120, ChinaState Key Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, ChinaSchool of Mathematics and Computers, Panzhihua University, Panzhihua 617000, ChinaState Key Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, ChinaState Key Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, ChinaSignificance Igneous rocks are well-developed in the southern Pinghu slope zone, Xihu Sag, East China Sea Shelf Basin. In this zone, the increased local geotemperature caused by magmatic activity produced significant impacts on the thermal evolution of source rocks and the formation of secondary pores in sandstone reservoirs and also serves as a significant indicator of regional tectonic movements, thus holding great significance for understanding the regional geological history. Objective and Methods This study aims to determine the formation stages and distribution patterns of igneous rocks as the cap rocks in the southern Pinghu slope zone. Using previous study results and the data of adjacent areas, as well as 3D seismic data and related attributes, and data from drilling and logs, this study analyzed the types, corresponding strata, and distribution ranges of volcanic rocks in the southern Pinghu slope zone. Furthermore, the formation stages of igneous rocks in the slope zone were explored based on the stratigraphic chronology, the morphologies of volcanic edifices, and the contact relationship between volcanic edifices and surrounding rocks. Results and Conclusions The results indicate that the seismic facies of igneous rocks in the Pingnan area can be divided into volcanic vent facies, along with explosive, overflow, and intrusive facies, with mounded and shield volcanic edifices proving the most developed. The magmatic activity in the Xihu Sag can be divided into three stages. Specifically, magmatic activity during the regional Longjing Movement, occurring in the late Miocene, exhibits the highest intensity and widest influence range. Besides, local small-scale tectonic movements occurred in the late depositional stage of the Yuquan Formation and the early depositional stage of the Santan Formation, corresponding to weak magmatic activity with minimal impacts. The Pingnan area contains five lithologic, low-amplitude drape anticline/fault combination traps associated with magmatic activity. The results of this study will provide a reference for future hydrocarbon exploration and production in the southern Pinghu slope zone of the Xihu Sag.http://www.mtdzykt.com/article/doi/10.12363/issn.1001-1986.24.05.0324xihu sagmagmatic activityvolcanic edificeseismic response characteristic |
| spellingShingle | Naiquan SUN Donghui JIANG Jie PAN Yang GAO Renhai PU Xinxu DONG Characteristics of Cenozoic volcanic edifices in the Pingnan area, Xihu Sag Meitian dizhi yu kantan xihu sag magmatic activity volcanic edifice seismic response characteristic |
| title | Characteristics of Cenozoic volcanic edifices in the Pingnan area, Xihu Sag |
| title_full | Characteristics of Cenozoic volcanic edifices in the Pingnan area, Xihu Sag |
| title_fullStr | Characteristics of Cenozoic volcanic edifices in the Pingnan area, Xihu Sag |
| title_full_unstemmed | Characteristics of Cenozoic volcanic edifices in the Pingnan area, Xihu Sag |
| title_short | Characteristics of Cenozoic volcanic edifices in the Pingnan area, Xihu Sag |
| title_sort | characteristics of cenozoic volcanic edifices in the pingnan area xihu sag |
| topic | xihu sag magmatic activity volcanic edifice seismic response characteristic |
| url | http://www.mtdzykt.com/article/doi/10.12363/issn.1001-1986.24.05.0324 |
| work_keys_str_mv | AT naiquansun characteristicsofcenozoicvolcanicedificesinthepingnanareaxihusag AT donghuijiang characteristicsofcenozoicvolcanicedificesinthepingnanareaxihusag AT jiepan characteristicsofcenozoicvolcanicedificesinthepingnanareaxihusag AT yanggao characteristicsofcenozoicvolcanicedificesinthepingnanareaxihusag AT renhaipu characteristicsofcenozoicvolcanicedificesinthepingnanareaxihusag AT xinxudong characteristicsofcenozoicvolcanicedificesinthepingnanareaxihusag |