Gravity survey of the central Alpine Fault near the DFDP-2 drill site, Whataroa, South Island, New Zealand. Issue 1 (2nd January 2020)
- Record Type:
- Journal Article
- Title:
- Gravity survey of the central Alpine Fault near the DFDP-2 drill site, Whataroa, South Island, New Zealand. Issue 1 (2nd January 2020)
- Main Title:
- Gravity survey of the central Alpine Fault near the DFDP-2 drill site, Whataroa, South Island, New Zealand
- Authors:
- Jenkins, Steve
Sutherland, Rupert
Townend, John - Abstract:
- ABSTRACT: We present a high-precision gravity survey of the Whataroa River valley near the DFDP-2 drill site. We measured 466 new sites and achieved a standard error on repeat measurements of 0.015 mGal. We combined existing data from 134 sites. A negative residual gravity anomaly of up to 6 mGal is interpreted as a buried glacial channel 350–450 m beneath the valley floor. It is apparently dextrally offset and upthrown to the southeast by the Alpine Fault. We are able to better constrain the surface trace location of the Alpine Fault by combining gravity models with surface mapping. A high horizontal gravity gradient near the DFDP-2 drill site requires a steeply-dipping or overhanging bedrock surface, and indicates that an active reverse fault might bound the base of the hillslope. A 4 mGal residual gravity minimum near the axis of the valley near the DFDP-2 drill site is interpreted as the deepest point upstream of the fault of what was a lake that formed at the end of the Last Glacial Maximum (∼18 ka).
- Is Part Of:
- New Zealand journal of geology and geophysics. Volume 63:Issue 1(2020)
- Journal:
- New Zealand journal of geology and geophysics
- Issue:
- Volume 63:Issue 1(2020)
- Issue Display:
- Volume 63, Issue 1 (2020)
- Year:
- 2020
- Volume:
- 63
- Issue:
- 1
- Issue Sort Value:
- 2020-0063-0001-0000
- Page Start:
- 128
- Page End:
- 144
- Publication Date:
- 2020-01-02
- Subjects:
- Tectonics -- glacial -- geomorphology -- Bouguer -- gravity -- Alpine Fault -- DFDP-2 -- Whataroa
Geology -- New Zealand -- Periodicals
Geology -- Periodicals
Geophysics -- Periodicals
Geofysica
Geologie
Geology
Geophysics
New Zealand
Periodicals
559.3 - Journal URLs:
- http://books.google.com/books?id=9gm8AAAAIAAJ ↗
http://books.google.com/books?id=EB28AAAAIAAJ ↗
http://books.google.com/books?id=KBm8AAAAIAAJ ↗
http://books.google.com/books?id=dCoEAQAAIAAJ ↗
http://www.informaworld.com/smpp/title~content=t918982746~db=all ↗
http://www.tandfonline.com/toc/tnzg20/current ↗
http://www.tandfonline.com/ ↗ - DOI:
- 10.1080/00288306.2019.1639777 ↗
- Languages:
- English
- ISSNs:
- 1175-8791
- Deposit Type:
- Legaldeposit
- View Content:
- Available online (eLD content is only available in our Reading Rooms) ↗
- Physical Locations:
- British Library DSC - BLDSS-3PM
British Library STI - ELD Digital store - Ingest File:
- 18589.xml