Abstract

A recent survey by Geoscience Australia acquired new exploration data and samples in the frontier offshore Lord Hose Rise (LHR) Capel-Faust region. This survey identified a number of volcanic features including cones, flows and sill-related features on the seafloor. Based on analysis of seismic data in the region (s302) and swath bathymetry, there are at least two distinct ages of volcanism exposed on the seafloor; Miocene-Pliocene (approximately 4-7 Ma) cones with a largely unmodified conical shape and Eocene-Oligocene volcanic features. The Eocene-Oligocene edifices can be seen on seismic profiles to extend from Palaeocene-Eocene and Eocene-Oligocene unconformities, in many cases overlying basement highs, through a blanket of marine ooze, to be exposed on the seafloor. Each cone is surrounded by a moat where the currents have eroded sediment. The Gifford Guyot (approximately 18 Ma), part of the Lord Howe Seamount chain was included in the survey area. Volcanic features are common on the seafloor of the Lord Howe Rise and in the neighbouring Tasman Basin, with two identified north-south seamount hotspot chains to the west of the Capel-Faust region that have been active from the Miocene to recent. The ZoNéCo 5 survey also identified a few small conical seamounts on the northern LHR, along a roughly north-northwest trend, dated as Early Miocene. The younger Capel-Faust seamounts are aligned with these and the age relationships suggest they could be part of a single seamount chain. The older Eocene-Oligocene cones do not show any preferred alignment within the survey area and are too old to be related to the current hotspot activity identified in the region.
Google map showing geographic bounding box with values North bound -26.0 East bound 163.5 West bound 159.5 South bound -29.5
Related Links
For information on acquiring this product,
please contact the Geoscience Australia Sales Centre via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Please note that support hours are 9 am to 5 pm weekdays

Product Type/Sub Type

dataset - External Publication

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2010

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

External Publication
volcanology
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-26.0
East bound
163.5
West bound
159.5
South bound
-29.5

Lineage

Unknown

Digital Transfer Options

onLine

Distributor

Role
distributor
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

a05f7892-ef73-7506-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

2010-01-11

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Related Links
For information on acquiring this product,
please contact the Geoscience Australia Sales Centre via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).

Please note that support hours are 9 am to 5 pm weekdays