Skip to main content

Main menu

  • Home
  • Content
    • Current
    • Archive
    • Special Volumes and Special Issue
  • Subscriptions
    • Subscribers
    • FAQ
    • Terms & Conditions for use of AJS Online
  • Instructions to Authors
    • Focus and paper options
    • Submit your manuscript
  • Site Features
    • Alerts
    • Feedback
    • Usage Statistics
    • RSS
  • About Us
    • Editorial Board
    • The Journal

User menu

  • Register
  • Subscribe
  • My alerts
  • Log in
  • My Cart

Search

  • Advanced search
American Journal of Science
  • Register
  • Subscribe
  • My alerts
  • Log in
  • My Cart
American Journal of Science

Advanced Search

  • Home
  • Content
    • Current
    • Archive
    • Special Volumes and Special Issue
  • Subscriptions
    • Subscribers
    • FAQ
    • Terms & Conditions for use of AJS Online
  • Instructions to Authors
    • Focus and paper options
    • Submit your manuscript
  • Site Features
    • Alerts
    • Feedback
    • Usage Statistics
    • RSS
  • About Us
    • Editorial Board
    • The Journal
  • Follow ajs on Twitter
  • Visit ajs on Facebook
  • Follow ajs on Instagram

Table of Contents

September 01, 2015; Volume 315,Issue 7

Cover image

Cover image expansion

Cover Image

Tectonomagmatic synthesis of the Panjal Traps and the opening of the Neotethys Ocean. (Top) Eruption of the Early Permian Panjal Traps occured within a continental rift zone of the Tethyan margin of Gondwana (India). The silicic volcanic rocks (crustal melts) are amongst the earliest lavas to erupt and are followed by the main flood basalt sequence that consists of high- and low-Ti basalts. The lower flows of basalt have chondritic isotopic signatures (εNd(t) ± 1) whereas the upper flows are variably enriched (εNd(t) = −2.0 to −5.3). It is likely that unseen silicic and mafic intrusive complexes also formed with the crust. (Bottom) As the adolescent continent rift transitions to a nascent ocean basin the basalts begin to have chemical similarity of MORB and have moderately depleted isotopic signatures (εNd(t) = +2.4 to +4.3). As rifting continues the continental margin of Gondwana (India) is separated from the newly formed ribbon-like continent Cimmeria by the Neotethys Ocean. (See article titled Multiple mantle sources of the Early Permian Panjal Traps, Kashmir, India by Shellnutt and others, this issue, p. 589–619).

Back to top
PreviousNext

In this issue

American Journal of Science: 315 (7)
American Journal of Science
Vol. 315, Issue 7
1 Sep 2015
  • Table of Contents
  • Table of Contents (PDF)
  • About the Cover
  • Index by author
  • Ed Board (PDF)
Sign up for alerts
Entire Issue ($25)

Jump to

  • Articles
  • Top Topics
  • Most Cited
  • Most Read
Loading

Navigate

  • Current Issue
  • Archive

More Information

  • RSS

Other Services

  • About Us

© 2023 American Journal of Science

Powered by HighWire