资源丰富的新生代大麦克阿瑟盆地西部的构造演化：聚焦澳大利亚北部戴利沃特斯断层带

IF 3.2 2区地球科学 Q2 GEOSCIENCES, MULTIDISCIPLINARY

Precambrian Research Pub Date : 2024-11-26 DOI:10.1016/j.precamres.2024.107616

Johann Soares , Rosalind King , Simon Holford , Alan S. Collins

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引用次数: 0

摘要

新生代盆地覆盖了各大洲的广大板块地区。它们的盆地结构保存了大量信息，可以揭示世界大部分地区的构造演化，但许多盆地的地震数据分辨率还不足以揭示其内部结构。约位于北澳大利亚克拉通的 1820-1320 Ma 大麦克阿瑟盆地是一个数据丰富的例外。西面（比尔林杜盆地）、南面（汤姆金森省）和北面（严格意义上的麦克阿瑟盆地）的地表出露通过穿越贝塔卢次盆地的地震剖面连接在一起，从而确定了整个盆地的演化过程。该断层带是一个边界，将比尔林杜盆地和西部贝塔卢次盆地与东部贝塔卢次盆地分割开来。这是一个复杂的断层带，具有多个阶段的构造延伸和压缩，影响了大麦克阿瑟盆地从红岸套（约 1820-1700 年）到威尔顿套（约 1500-1320 年）的填充。我们重新解释了从比尔林杜盆地到贝塔卢次盆地西部以及穿越戴利沃特斯断裂带地区的二维地震线和 17 口钻井，以更好地了解盆地的演变和戴利沃特斯断裂带的作用。我们揭示了控制该地区沉积和掘起的至少五个构造事件：1）早期红岸包块时期的延伸（约 1820-1750 Ma），随后是倒置红岸包块的压缩（约 1740-1700 Ma）。2) Glyde岩群时期的延伸（约1660-1620 Ma）。3) Glyde 包层沉积后的压缩（约 1620-1520 Ma）。4) 下威尔顿岩群时期的延伸（约 1500-1400 Ma），以及 5) 威尔顿岩群沉积后的压缩（约 1320 Ma 之后）。

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Structural evolution of the resource-rich Proterozoic western greater McArthur Basin: A focus on the Daly Waters Fault Zone, northern Australia

Proterozoic basins cover vast cratonic areas on every continent. Their basin architecture preserves considerable information that can unravel the tectonic evolution of large parts of the world, yet many do not yet have the resolution of seismic data across them to reveal their internal structure. The ca. 1820–1320 Ma greater McArthur Basin, in the North Australian Craton, is a data-rich exception. Surface exposures in the west (Birrindudu Basin), south (Tomkinson Province) and north (McArthur Basin sensu stricto) are linked together in seismic profiles through the Beetaloo Sub-basin that allow the full basin evolution to be determined.

A key feature of the basin is the Daly Waters Fault Zone, a north–south-oriented structural formation about 200 km in length. This fault zone serves as a boundary, dividing the Birrindudu Basin and the western Beetaloo Sub-basin from the eastern Beetaloo Sub-basin. It is a complex fault zone with multiple phases of structural extension and compression that have influenced the greater McArthur Basin fill from the Redbank Package (ca. 1820–1700 Ma) to the Wilton Package (ca. 1500–1320 Ma).

Two dimensional seismic lines and 17 well penetrations in an area encompassing the Birrindudu Basin to the western portion of the Beetaloo Sub-basin and across the Daly Waters Fault Zone are re-interpreted to better understand the evolution of the basin and the role of the Daly Waters Fault Zone. We reveal at least five tectonic events that controlled deposition and exhumation in the region: 1) Extension during the early Redbank Package (ca. 1820–1750 Ma), followed by compression that inverted the Redbank Package (ca. 1740–1700 Ma). 2) Extension during the Glyde Package (ca. 1660–1620 Ma). 3) Compression after deposition of the Glyde Package (ca. 1620–1520 Ma). 4) Extension during the lower Wilton Package (ca. 1500–1400 Ma), and 5) compression after deposition of the Wilton Package (after ca. 1320 Ma).

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来源期刊

Precambrian Research 地学-地球科学综合

CiteScore

7.20

自引率

28.90%

发文量

325

审稿时长

12 months

期刊介绍： Precambrian Research publishes studies on all aspects of the early stages of the composition, structure and evolution of the Earth and its planetary neighbours. With a focus on process-oriented and comparative studies, it covers, but is not restricted to, subjects such as: (1) Chemical, biological, biochemical and cosmochemical evolution; the origin of life; the evolution of the oceans and atmosphere; the early fossil record; palaeobiology; (2) Geochronology and isotope and elemental geochemistry; (3) Precambrian mineral deposits; (4) Geophysical aspects of the early Earth and Precambrian terrains; (5) Nature, formation and evolution of the Precambrian lithosphere and mantle including magmatic, depositional, metamorphic and tectonic processes. In addition, the editors particularly welcome integrated process-oriented studies that involve a combination of the above fields and comparative studies that demonstrate the effect of Precambrian evolution on Phanerozoic earth system processes. Regional and localised studies of Precambrian phenomena are considered appropriate only when the detail and quality allow illustration of a wider process, or when significant gaps in basic knowledge of a particular area can be filled.