C.L. Rollinson’s research while affiliated with University of Maryland, College Park and other places

What is this page?

This page lists works of an author who doesn't have a ResearchGate profile or hasn't added the works to their profile yet. It is automatically generated from public (personal) data to further our legitimate goal of comprehensive and accurate scientific recordkeeping. If you are this author and want this page removed, please let us know.

Publications (1)

Chromium in rocks and minerals from the southern California batholith
  • Article

December 1976

·

6 Reads

·

8 Citations

Chemical Geology

F.O. Simon

·

C.L. Rollinson

Chromium, determined by neutron-activation analysis in a suite of rocks and minerals from the southern California batholith, shows Cr concentrated in the mafic differentiates, decreasing as the more felsic rocks are approached. This trend is evident for samples of the Woodson Mountain Granodiorite from a single differentiated stock.The distribution of Cr in the minerals from the rocks of the southern California batholith shows that Cr was depleted in the magma during the course of crystallization. The data indicate that the minerals were in equilibrium with the magma during crystallization, and the distribution coefficient (Cr in biotite/Cr in hornblende) is correlated with differentiation indices, indicating either temperature or compositional dependence. The average distribution coefficient (Cr in biotite/Cr in hornblende) is 1.18, which compares favorably with the average values found by other investigators for other suites.

Citations (1)

... Therefore, it once again seems likely that the source was something more enriched in V and Cr than the silicic rocks of the Cornubian Batholith, which makes up the primary known provenance of the Vectis Formation (Allen, 1991;Radley & Allen, 2012). Cr is generally only associated in significant volumes in mafic rocks, where it primarily partitions into pyroxenes over olivines, as well as into magnetite, with its abundance in these minerals (and in the whole rock) decreasing as the rock becomes more silicic (Ridley, 2013;Simon & Rollinson, 1976). Cr is also often found in the mineral chromite, FeCr2O4, which often forms as a minor or accessory mineral in mafic to ultramafic environments, most typically in layered intrusions, but also in ophiolites (Ridley, 2013). ...

Reference:

The Stratigraphy, Geochemistry, and Palaeoenvironments of the Barremian-Aptian (Early Cretaceous) of the west coast of the Isle of Wight, England
Chromium in rocks and minerals from the southern California batholith
  • Citing Article

  • December 1976

Chemical Geology

F.O. Simon

·

C.L. Rollinson