new constraints on the p t path of ht uht metapelites from the highland complex of sri lanka

New constraints on the P–T path of HT/UHT metapelites from the Highland Complexof Sri Lanka P.L.. As a service to our customers we are providing this early version of the manuscript.. Th

New constraints on the P–T path of HT/UHT metapelites from the Highland Complex

of Sri Lanka

P.L Dharmapriya, Sanjeewa P.K Malaviarachchi, L.M Kriegsman, Andrea Galli, K.

Sajeev, Chengli Zhang

PII: S1674-9871(17)30027-0

Reference: GSF 534

To appear in: Geoscience Frontiers

Received Date: 4 September 2016

Revised Date: 5 December 2016

Accepted Date: 18 December 2016

Please cite this article as: Dharmapriya, P.L., Malaviarachchi, S.P.K., Kriegsman, L.M., Galli, A., Sajeev,

K., Zhang, C., New constraints on the P–T path of HT/UHT metapelites from the Highland Complex of Sri Lanka, Geoscience Frontiers (2017), doi: 10.1016/j.gsf.2016.12.005.

This is a PDF file of an unedited manuscript that has been accepted for publication As a service to our customers we are providing this early version of the manuscript The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

Table 1 Representative bulk chemical compositions of the khondalite from XRF (major

elements are in mol%; trace elements are in ppm) Element Quantity

Table 3 Representative electron microprobe analyses of biotite, spinel, corundum, K-feldspar, pyrophylite, rutile and ilmenite in the khondalite

(major elements are in wt.%)

Bt in Grt1

Bt in Grt3 Spl in Grt2 Spl in Grt3 Crn in Grt2

Grt3

Matrix

Kfs- Grt3 Ru-Grt4

Prl- Grt4

Table 4: Bulk rock and melt compositions used in the pseudosection calcualtion CXRF: bulk rock

composition measured by XRF; CM1 - CM4: rock composition calculated after melt reintegration; M1 - M4:

composition of melt reintegrated Melt amount (vol.%), T (°C) and P (kbar): PT conditions and amount of

melt reintegrated at each step

2 First attempt of P-T calculation using thermodyanamic modeling of early prograde P-T

trajectory followed by the Highland Complex metasediments

3 Peak metamorphic P-T-t conditions are around ~9 kbar, 900 0C and 540 Ma respectively

4 Implications of P-T-t evolution of metasediments in the Highland Complex of Sri Lanka