MGDS Event Information

D-01

Start

66.65° E 16.7083° S

2007-11-11T15:36:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

66.6524° E 16.7123° S

2007-11-11T16:59:00

Nav Type

GPS

Details

Tectonic setting = ridge axis: ridge crest. Dredge content = sheet flow with glass. >100 pieces triaged into 5 samples for study

D-02

Start

66.8333° E 17.0138° S

2007-11-11T22:29:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

66.8208° E 17.002° S

2007-11-12T02:46:00

Nav Type

GPS

Details

Tectonic setting = fracture zone: inside corner high. Dredge content = Gabbro, harzburgite, pyroxenite. 22 samples for study

D-03

Start

66.8782° E 16.9552° S

2007-11-12T07:42:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

66.883° E 16.955° S

2007-11-12T09:21:00

Nav Type

GPS

Details

Tectonic setting = ridge axis: neovolcanic zone. Dredge content = 15 grams of basaltic glass shards+.

D-04

Start

66.1281° E 18.003° S

2007-11-13T02:55:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

66.1329° E 18.0031° S

2007-11-13T04:28:00

Nav Type

GPS

Details

Tectonic setting = seamount: midslope. Dredge content = (Mn-coated) pillow basalt fragments. 13 samples selected for study

D-05

Start

65.8972° E 18.1112° S

2007-11-13T10:30:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

65.9028° E 18.108° S

2007-11-13T11:06:00

Nav Type

GPS

Details

Tectonic setting = seamount: midslope. Dredge content = Vesicular Basalt/Mn-Crust. 4 (2 basalts/2 mn-crust) selected for study

D-06

Start

65.6805° E 18.3612° S

2007-11-13T15:18:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

65.6872° E 18.3575° S

2007-11-13T17:27:00

Nav Type

GPS

Details

Tectonic setting = seamount: coll either side of smt. Dredge content = Mn-Coated Basalt + Gl. 2 Samples selected for study

D-07

Start

65.4383° E 18.2067° S

2007-11-13T18:44:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

65.7362° E 18.3392° S

2007-11-14T21:20:00

Nav Type

GPS

Details

Tectonic setting = seamount: midslope. Dredge content = few glass shards. Some glass fragments selected for study

D-08

Start

65.1416° E 18.0502° S

2007-11-14T01:48:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

65.1423° E 18.0547° S

2007-11-14T03:49:00

Nav Type

GPS

Details

Tectonic setting = ridge axis: ridge crest. Dredge content = pillow fragments with very fresh glass. 4 samples selected for study

D-09

Start

65.2082° E 18.1335° S

2007-11-14T07:56:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

65.2163° E 18.1312° S

2007-11-14T10:20:00

Nav Type

GPS

Details

Tectonic setting = ridge axis: ridge crest. Dredge content = pillow fragments with very fresh glass. 6 samples selected for study

D-10

Start

66.3249° E 20.1585° S

2007-11-15T03:11:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

66.3297° E 20.1585° S

2007-11-15T04:27:00

Nav Type

GPS

Details

Tectonic setting = ridge axis: ridge crest. Dredge content = pillow fragments with very fresh glass. 27 samples selected for study

D-11

Start

66.2762° E 20.0673° S

2007-11-15T07:20:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

66.2794° E 20.0684° S

2007-11-15T09:56:00

Nav Type

GPS

Details

Tectonic setting = ridge axis: ridge crest. Dredge content = glass fragments. only ~4grams for glass/basalt fragments

D-12

Start

66.2702° E 20.0667° S

2007-11-15T12:19:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

66.2694° E 20.0667° S

2007-11-15T16:36:00

Nav Type

GPS

Details

Tectonic setting = ridge axis: ridge crest. Dredge content = pillow fragments with very fresh glass.

D-13

Start

66.2402° E 19.9848° S

2007-11-15T17:36:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

66.245° E 19.985° S

2007-11-15T22:20:00

Nav Type

GPS

Details

Tectonic setting = ridge axis: ridge crest. Dredge content = pillow fragments with very fresh glass.

D-14

Start

66.1665° E 19.9055° S

2007-11-15T23:38:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

66.1713° E 19.9055° S

2007-11-16T02:22:00

Nav Type

GPS

Details

Tectonic setting = ridge axis: ridge crest. Dredge content = pillow fragments with very fresh glass. 11 samples selected for study

D-15

Start

66.0101° E 19.757° S

2007-11-16T05:45:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

66.0148° E 19.755° S

2007-11-16T08:22:00

Nav Type

GPS

Details

Tectonic setting = ridge axis: ridge crest. Dredge content = pillow fragments with very fresh glass. 8 samples selected for study

D-17

Start

65.88° E 19.6133° S

2007-11-16T12:32:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

65.8848° E 19.6133° S

2007-11-16T14:01:00

Nav Type

GPS

Details

Tectonic setting = ridge axis: ridge crest. Dredge content = .

D-18

Start

65.8575° E 19.7229° S

2007-11-16T17:26:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

65.8623° E 19.7228° S

2007-11-16T18:37:00

Nav Type

GPS

Details

Tectonic setting = : ridge crest. Dredge content = .

D-19

Start

2007-11-16T20:13:00

Locale

CentralIndianRidge

SpreadingCenter

Nav Type

GPS

Details

13 samples selected for study

D-20

Start

65.4855° E 19.6797° S

2007-11-17T02:51:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

65.4897° E 19.6775° S

2007-11-17T04:06:00

Nav Type

GPS

Details

Tectonic setting = slope of ridge: ridge crest. Dredge content = ~150 kg of pillow fragments, coral fragments. 13 samples selected for study

D-21

Start

65.307° E 19.7046° S

2007-11-17T07:50:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

65.3098° E 19.7046° S

2007-11-17T08:42:00

Nav Type

GPS

Details

Tectonic setting = slope of ridge: ridge crest. Dredge content = empty!. dredge tangled up?

D-22

Start

64.9667° E 19.6167° S

2007-11-17T11:48:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

64.9713° E 19.6168° S

2007-11-17T14:52:00

Nav Type

GPS

Details

Tectonic setting = Ridge - GASPARD: 3 Magi Ridge. Dredge content = Single basalt with glass. 1 sample for study

D-23

Start

64.922° E 19.6758° S

2007-11-17T19:30:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

64.922° E 19.6758° S

2007-11-17T22:55:00

Nav Type

GPS

Details

Tectonic setting = Ridge - MELCHIOR: 3 Magi Ridge. Dredge content = Altered basalt minimal glass. 2 Samples selected for study

D-24

Start

64.9455° E 19.6668° S

2007-11-18T00:24:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

64.95° E 19.6682° S

2007-11-18T23:40:00

Nav Type

GPS

Details

Tectonic setting = Ridge - MELCHIOR: 3 Magi Ridge. Dredge content = Altered basalt minimal glass. 2 Samples selected for study

D-25

Start

64.8448° E 19.5853° S

2007-11-18T01:56:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

64.8494° E 19.5869° S

2007-11-18T03:41:00

Nav Type

GPS

Details

Tectonic setting = Ridge - Balthazar: 3 Magi Ridge. Dredge content = assorted, old, Mn-coated, Fe-oxide stained pillow lavas. 6 samples selected for study

D-26

Start

64.7147° E 19.6159° S

2007-11-18T06:41:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

64.719° E 19.6182° S

2007-11-18T08:01:00

Nav Type

GPS

Details

Tectonic setting = Ridge - Balthazar : 3 Magi Ridge. Dredge content = 2 large (old, Mn-coated) pillow fragments, smaller pillow. 3 samples selected for study

D-27

Start

64.4418° E 19.5834° S

2007-11-18T19:50:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

64.4453° E 19.5833° S

2007-11-18T21:52:00

Nav Type

GPS

Details

Tectonic setting = Ridge - Rodrigues: Rodrigues Ridge. Dredge content = empty!. dredge hung up! Chain damaged!

D-28

Start

64.4417° E 19.5833° S

2007-11-18T23:43:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

64.4415° E 19.5878° S

2007-11-19T02:11:00

Nav Type

GPS

Details

Tectonic setting = Ridge - Rodrigues: Rodrigues Ridge. Dredge content = empty!. few grams of sand, coral fragments

D-29

Start

64.2933° E 19.6033° S

2007-11-19T04:30:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

64.2933° E 19.6034° S

2007-11-19T07:56:00

Nav Type

GPS

Details

Tectonic setting = Ridge - Rodrigues: Rodrigues Ridge. Dredge content = 2kg of polymict breccia. dredge hung up! 2 weak links busted

D-30

Start

64.075° E 19.6417° S

2007-11-19T11:20:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

64.0787° E 19.6445° S

2007-11-19T13:04:00

Nav Type

GPS

Details

Tectonic setting = Ridge - Rodrigues: Rodrigues Ridge. Dredge content = 8kg of alttered pillow basalt. no pinger on wire!

D-31

Start

63.75° E 19.45° S

2007-11-21T20:18:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

63.7548° E 19.45° S

2007-11-21T21:47:00

Nav Type

GPS

Details

Tectonic setting = Ridge - Rodrigues: Rodrigues Ridge. Dredge content = 1 piece (250g) of basalt.

D-32

Start

63.7553° E 19.45° S

2007-11-21T23:55:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

63.7595° E 19.4498° S

2007-11-22T01:17:00

Nav Type

GPS

Details

Tectonic setting = Ridge - Rodrigues: Rodrigues Ridge. Dredge content = 50g of small fragments of Mn-crust.

D-33

Start

64.1102° E 19.4683° S

2007-11-22T05:13:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

64.115° E 19.4667° S

2007-11-22T06:23:00

Nav Type

GPS

Details

Tectonic setting = Ridge - Rodrigues: Rodrigues Ridge. Dredge content = 10g of Mn-crust.

D-34

Start

64.1383° E 19.4598° S

2007-11-22T09:00:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

64.1423° E 19.4598° S

2007-11-22T10:32:00

Nav Type

GPS

Details

Tectonic setting = Ridge - Rodrigues: Rodrigues Ridge. Dredge content = 30kg of old pillow fragments. dredge hung up - moved ship backwards

D-35

Start

64.1332° E 19.7917° S

2007-11-22T14:36:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

64.138° E 19.7917° S

2007-11-22T15:56:00

Nav Type

GPS

Details

Tectonic setting = Ridge - Rodrigues: Rodrigues Ridge. Dredge content = empty!.

D-36

Start

64.1898° E 19.81° S

2007-11-22T19:10:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

64.1943° E 19.8117° S

2007-11-22T20:37:00

Nav Type

GPS

Details

Tectonic setting = Ridge - Rodrigues: Rodrigues Ridge. Dredge content = 1 piece (200g) of altered basalt.

D-37

Start

64.2915° E 20.048° S

2007-11-23T00:21:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

64.283° E 20.0478° S

2007-11-23T02:54:00

Nav Type

GPS

Details

Tectonic setting = Abyssal Hill: S of Rodrigues Ridge. Dredge content = 3.5kg of altered basalt and glass. moved ship 500m+250m

D-38

Start

62.3667° E 20.35° S

2007-11-23T16:54:00

Locale

CentralIndianRidge

SpreadingCenter

Stop

62.37° E 20.3467° S

2007-11-23T18:30:00

Nav Type

GPS

Details

Tectonic setting = Seamount: . Dredge content = 3 pieces of basalt.