塔宁巴尔海槽断裂特征与构造演化

doi:10.11867/j.issn.1001-8166.2021.046

地球科学进展 ›› 2022, Vol. 37 ›› Issue (3): 290 -302. doi: 10.11867/j.issn.1001-8166.2021.046

“东南亚构造、沉积与资源环境效应”专辑上一篇下一篇

塔宁巴尔海槽断裂特征与构造演化

何明勇 ¹ ^, ² ^, ³(

), 栾锡武 ¹(

), 魏新元 ³ ^, ⁴, 冉伟民 ² ^, ³, 穆敬轩 ¹ ^, ³, 叶传红 ¹ ^, ³, 刘洁 ³, 陈建宏 ¹ ^, ² ^, ³

^1.山东科技大学地球科学与工程学院，山东青岛 266590
^2.中国地质调查局青岛海洋地质研究所，山东青岛 266237
^3.青岛海洋科学与技术试点国家实验室，海洋矿产资源评价与探测技术功能实验室，山东青岛 266237
^4.中国海洋大学海洋地球科学学院，山东青岛 266100

收稿日期:2021-05-29 修回日期:2021-10-29 出版日期:2022-03-10
通讯作者: 栾锡武 E-mail:841804750@qq.com;xluan@sdust.edu.cn
基金资助:
中国—东盟海上合作基金项目“中国—东盟海洋地震数据平台与研究中心建设”(12120100500017001);国家自然科学基金项目“孟加拉湾东北部沉积过程与特提斯东段构造变形耦合关系”(92055211)

Fault Characteristics and Tectonic Evolution of the Tanimbar Trough

Mingyong HE ¹ ^, ² ^, ³( ), Xiwu LUAN ¹( ), Xinyuan WEI ³ ^, ⁴, Weimin RAN ² ^, ³, Jingxuan MU ¹ ^, ³, Chuanhong YE ¹ ^, ³, Jie LIU ³, Jianhong CHEN ¹ ^, ² ^, ³

^1.College of Earth Science and Engineering，Shandong University of Science and Technology，Qingdao 266590，China
^2.Qingdao Institute of Marine Geology，China Geological Survey，Qingdao 266237，China
^3.Laboratory of Marine Mineral Resources，Pilot National Laboratory for Marine Science and Technology （Qingdao），Qingdao 266237，China
^4.College of Marine Geosciences，Ocean University of China，Qingdao 266100，China

Received:2021-05-29 Revised:2021-10-29 Online:2022-03-10 Published:2022-04-14
Contact: Xiwu LUAN E-mail:841804750@qq.com;xluan@sdust.edu.cn
About author:HE Mingyong (1995-), male, Benxi City, Liaoning Province, Master student. Research areas include seismic interpretation, tectonic evolution of continental margin. E-mail: 841804750@qq.com
Supported by:
the China-ASEAN Maritime Cooperation Fund Project "China-ASEAN Marine seismic data center"(12120100500017001);The National Natural Science Foundation of China "Coupling relationship between sedimentary process and tectonic deformation of northeastern Bay of Bengal, an Eastern Tethys section"(92055211)

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塔宁巴尔海槽位于印度尼西亚班达弧的东南部，与帝汶海槽以及阿鲁海槽相连接。形成于澳大利亚大陆与班达弧的碰撞过程中，在弧—陆碰撞中，碰撞的轨迹、年龄和方式仍然存在争议，对于塔宁巴尔海槽是否为俯冲带也存在着争议。依据二维地震测线，运用生长指数与古落差法定量分析塔宁巴尔海槽断层，结合测井以及物源研究探讨塔宁巴尔海槽的断裂特征及其构造演化。研究结果表明，塔宁巴尔海槽在白垩世与早上新世断裂活动较为活跃，与构造活动发生的时间相一致，中生代的裂谷作用形成中生代的正断层，早上新世澳大利亚板块与班达弧发生碰撞，弧—陆碰撞导致塔宁巴尔群岛的隆升与塔宁巴尔海槽的沉降并引发了中生代断裂的再活化。海槽的变形持续至晚上新世，形成现今塔宁巴尔海槽形态。

关键词: 塔宁巴尔海槽, 弧—陆碰撞, 断裂特征, 构造演化

The Tanimbar Trough is located southeast of the Banda Arc in Indonesia， and is connected with the Timor and Aru troughs， which were formed during the collision between the Australian continent and Banda Arc. During the arc-continent collision， the track， age， and mode of collision remain controversial. It is also controversial whether the Tanimbar Trough is a subduction zone. Based on the 2D seismic lines， the growth index， and the paleo-fall method， the faults in the study area were quantitatively analyzed. Combined with logging and provenance studies， the fault characteristics and tectonic evolution of the Tanimbar Trough are discussed. The results show that the fault activity in the study area was active during the Cretaceous and Early Pliocene， which coincided with the period of tectonic activity. Mesozoic rifting formed normal Mesozoic faults， and the Australian Plate collided with the Banda Arc in the early Pliocene. The arc-land collision led to the uplift of Tanimbar Island and the subsidence of the Tanimbar Trough and triggered the reactivation of Mesozoic faults. The deformation of the trough continued until the Late Pliocene， forming the Tanimbar Trough.

Key words: Tanimbal Trough, Arc-continent collision, Fracture characteristics, Tectonic evolution

中图分类号:

P736.1

图1 塔宁巴尔海槽位置与区域构造

Fig. 1 Location and regional structure of Tanimbar Trough

图2 塔宁巴尔海槽及附近地层^{［

25
］}

Fig. 2 Tanimbar Trough and its adjacent strata^{［

25
］}

图3 二维地震测线与研究区断裂分布（位置见图1黄色线框）

Fig. 3 2D seismic lines and fault distribution in the study area （see Fig. 1 yellow box for location）

图4 断裂组合（剖面位置见图3）

Fig. 4 Fracture combination diagram （see Fig. 3 for profile location）

图5 塔宁巴尔海槽剖面（剖面位置见图3）

Fig. 5 Profile of Tanimbar Trough （see Fig. 3 for location）

图6 塔宁巴尔海槽F1~F8断层生长指数与落差定量分析

Fig. 6 Quantitative analysis of growth index and fall of fault F1~F8 in Taninbar Trough

图7 塔宁巴尔海槽F4和F6生长指数与落差分析

Fig. 7 Growth index and fall analysis of F4 and F6 in Tanimbar Trough

图8 塔宁巴尔海槽新近纪地层划分（剖面位置见图3）

Fig. 8 Stratigraphic division of Neogene in Tanimbar Trough （see Fig. 3 for the location of the section）

图9 晚白垩世至今塔宁巴尔区域沉积演化^{［

18
］}

Fig. 9 Sedimentary evolution of tanimbar area from Late Cretaceous to present^{［

18
］}

图10 塔宁巴尔海槽底部（剖面位置见图3）

Fig. 10 Bottom of Tanimbar Trough （see Fig. 3 for the location of the section）

图11 塔宁巴尔海槽构造演化^{［

11
，

26
，

47
，

50
］}

Fig. 11 Tectonic evolution map of Taninbar Trough^{［

11
，

26
，

47
，

50
］}

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