کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4726563 1640132 2016 19 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Melanesian back-arc basin and arc development: Constraints from the eastern Coral Sea
ترجمه فارسی عنوان
حوضه پشت قوس ملاسانی و توسعه قوس: محدودیت های دریای مرجانی شرقی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
چکیده انگلیسی


• New magnetic, bathymetry and Ar–Ar dating from recent voyage to eastern Coral Sea
• Opening of Santa Cruz Basin and South Rennell Trough constrained between 48 and 25 Ma
• Single > 2000 km long Eocene–Oligocene back-arc basin existed landward of Melanesia.

The eastern Coral Sea is a poorly explored area at the north-eastern corner of the Australian Tectonic Plate, where interaction between the Pacific and Australian plate boundaries, and accretion of the world's largest submarine plateau – the Ontong Java Plateau – has resulted in a complex assemblage of back-arc basins, island arcs, continental plateaus and volcanic products. This study combines new and existing magnetic anomaly profiles, seafloor fabric from swath bathymetry data, Ar–Ar dating of E-MORB basalts, palaeontological dating of carbonate sediments, and plate modelling from the eastern Coral Sea. Our results constrain commencement of the opening of the Santa Cruz Basin and South Rennell Trough to c. 48 Ma and termination at 25–28 Ma. Simultaneous opening of the Melanesian Basin/Solomon Sea further north suggests that a single > 2000 km long back-arc basin, with at least one triple junction existed landward of the Melanesian subduction zone from Eocene–Oligocene times. The cessation of spreading corresponds with a reorganisation of the plate boundaries in the area and the proposed initial soft collision of the Ontong Java Plateau. The correlation between back-arc basin cessation and a widespread plate reorganisation event suggests that back-arc basins may be used as markers for both local and global plate boundary changes.

Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Gondwana Research - Volume 39, November 2016, Pages 77–95
نویسندگان
, , , , , , , , , ,