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JOIDES Journal Spring 2003 Volume 29, No. 1 JOIDES Journal Spring 2003 Joint Oceanographic Institutions for Deep Earth Sampling In this issue: Leg 197 Science Report ODP Leg 199 Investigates the “Greenhouse” Eocene in the Tropical Pacific Ocean Leg 201 Science Report 4.8�S 56 Ma Pelagic red clay SITE 1219 est. Paleolatitude Leg 202 (aeolian dust) RN RP 0 e (fixed hotspot) Science Report n e c o 5 ����� �������� ����� 10 i I M . d ������� ��� ����� 20 i m 4 e n 30 e 3 Paleo- c o i 2 40 M y l Equator r 1 a e 50 O/M e 22 n e � 60 c 2.8 S o g i l 70 O SITE 1220 � e 0.5 N t RN a Early Miocene to l RP 80 0 II 21 ~ SITE 1222 Oligocene e 90 10 I n RP e e 0 n c carbona 1 e tes o e c i n o 100 l M e 12 20 10 o . c � H 4.9 N e o o t g i l IA 110 22 e 30 II . O/M? 20 n 10 O o e d g c y i e l l SITE 1217 o r n g i O o a 120 40 21 l RP z . 30 e l O 0 n � e e t U 1.2 S n d a l 20 e 130 e c 50 . e 40 n 10 o 22 l o n o o e g III . i z l SITE 1221 c o H . n 20 o IB l g 140 O i o RP g l - 20 i 60 t . U I 50 l 0 . 21 I O e e e O . 20 n ���������������� II e e. Oligo. e 19 . 150 II . 30 c c E/O 19 20 c c E/O . E/O o 70 60 o e 18-19 o E/O E E c o 19 10 . �������� 19 n 16-18 E u o III m - E/O 18 E e 18 E e 17 l c e 18 . 40 160 l t 18 d 80 o 70 d d a i l 20 E 17 e m 17 n e 50 16 t 17 170 o a � 90 z l 30 16 80 9.0 N n IV e n Late to middle 16 U 60 180 IIIA 16 e c e 100 90 15 n IVA 40 o SITE 1216 e 70 IIA Eocene radiolarian 15 E e c 15 RP o e n 190 15 e. Eoc. e l 0 110 n e E 100 V d 50 e c 80 c oozes d e IIIA i o o l 14 E d E 200 14 m 10 e l d 120 14 n i d e o l 60 90 e d t i r m d 14 r m e d 20 a i o n 210 t 130 13 IA B e e e m 70 100 n n 13 13 c e e d � o c ������ �� ����� ������ c 30 11.5 N e o l o 220 IIB E n 140 110 o E H 12 y o ������ ����������� ���� 80 l e r z 12 l 40 e n d a n e 13 SITE 1215 12/11 IIIB d c e 230 i 120 U ��� ���� ����� ��������� ? 150 11 o NP RP e m 90 12 E . e 0 d e n 50 11 . c o e m n t e c n n . e o c 130 IB n o c 240 e e IV t c E o e r Z o 160 n u r o III . 9/10 E t r e 100 10 e e q . E 60 E o I a h c Early Eocene to e e e . N y o B l l C s V n 140 Basalt e IV r 250 o e 170 IVB a H c 20 late Paleocene 110 e o E 11 12 260 e y 8 n 9 180 l 30 r basal carbonates 120 e 11 c a o e 40 E 7 t 8 190 r IIIB y 10 130 II l e Barren r V e h a n e C 50 e 50 200 P/E c . 140 o o 9 IV E e l y l 60 a r a 7 P 7 150 e e . III t IV o 70 a l 8 e l Basalt V a IV 160 P 80 Not Zoned e t a l Plus: ODP/DSDP Legacy Holes: SCICOM Consensus Statement of Appreciation for the Ocean A Review of Drilling Program Delivered at the Final ODP SCICOM Meeting, Borehole March 17-20, 2003, Austin, Texas Installations In this issue ODP Leg 197: A Paleomagnetic Test for Motion of the Hawaiian from pages 2-5: Hotspot Nintoku To source Site 1205 vents To source Koko Detroit Detroit vents Site 1206 Site 1203 Site 1204 T C S C A C Pacific Ocean S CA C C A Lava pathway (tube) SA CA CA LITHOLOGY FLOW TYPE Tholeiite basalt (shield stage) C Compound pahoehoe Alkali basalt (postshield stage) S Simple pahoehoe Nearshore sandstone T Transitional Bedded calcareous silt and sandstones A A'a intercalated with primary tephra fall deposits Pillow lava Soil or weathered flow top Lava delta (flow foot breccia and pillow lobes) Figure 3. Schematic drawing (not to scale) showing the inferred volcanic environments for the volcanic sections drilled at Detroit (Sites 1203 and 1204), Nintoku (Site 1205) and Koko (Site 1206) Seamounts during Leg 197. The Detroit lava flows at Site 1204 and the lower part of the Site 1203 section were subaerially erupted (although shown as a submerged sequence following post- eruption subsidence). The lava flows and associated tephra fall deposits in the upper part of the Site 1203 section were emplaced into a low energy shallow marine environment. The Site 1205 lavas were entirely subaerial, as indicated by numerous soil hori- zons between flows. The 1206 section at Koko consists of lava flows that have flowed from land into water in a nearshore environ- ment. Subscript “A” indicates subaerial lava emplacement. In this issue from pages 6-10: ODP Leg 199 Investigates the "Greenhouse" Eocene in the Tropical Pacific Ocean Figure 4. Paleocene-Eocene boundary sections from ODP Leg 199 (Nomura et al., 2002). Figure Caption for the Front Cover Illustration: Figure 2. Lithologic summary at Leg 199 drillsites. The common reference level is the earliest Oligocene appear- ance of CaCO3. JOIDES Journal 1 TABLE OF CONTENTS In this issue: Volume 29, No. 1 Spring 2003 SCIENCE - ODP Leg 197: A Paleomagnetic Test for Motion of the Leg Reports Hawaiian Hotspot ................................................................. 2 ODP Leg 199 Investigates the “Greenhouse” Eocene in the Tropical Pacifi c Ocean ............................................... 6 ODP Leg 201 Explores Microbial Life in Deeply Buried Marine Sediments off Peru ..................................... 11 ODP Leg 202: Southeast Pacifi c Oceanographic Transects ............................................................................. 16 SCIENCE/ ODP/DSDP Legacy Holes: A Review of Reentry TECHNOLOGY - Holes, CORKs and other Borehole Installations ................ 21 Special Report PLANNING - Consensus Statement of Appreciation for the Ocean Drilling Program: Final ODP SCICOM Panel Report Meeting, March 17-20, 2003, Austin, Texas ...................... 27 Port Total days2 Co-Chief TAMU JOIDES Resolution Operations Leg Destination Dates1 (Origin) (Port/Sea) Scientists contact Schedule: November 2002 to September 2003 Rio de D. Kroon 208 Walvis Ridge 8 March - 9 May ‘03 62 (5/57) P. Blum Janeiro J. Zachos 1 Start date refl ects the fi rst full day in port, Rio de P. Kelemen and is the date of the ODP and ODL cross- 209 MAR Peridotite 9 May - 10 July ‘03 62 (5/57) J. Miller over meetings. The JOIDES Resolution is Janeiro E. Kikawa expected to arrive late the preceeding day. Newfoundland 10 July - J.-C. Sibuet Port call dates have been included in the 210 Bermuda 61 (5/56) A. Klaus Margin 9 September ‘03 B. Tucholke dates that are listed. 9 September - 2 Transit St. John’s 12 (1/11) N/A N/A Although 5-day port calls are generally 21 September ‘03 scheduled, the ship sails when ready. 3 21 September - Demobilization assumes a 7-day (+2 day Demobilization3 Galveston 9 (9/0) N/A N/A port call) period tentatively scheduled for 30 September ‘03 Galveston. 13 April 2003 2 JOIDES Journal - Volume 29, No. 1 JOIDES Journal - Volume 29, No. 1 3 SCIENCE ODP Leg 197: A Paleomagnetic Test for Motion of the Hawaiian SCIENCE Leg Reports Hotspot Leg Reports Robert Duncan 1, John Tarduno 2, David Scholl 3, and the Leg 197 Scientific Party INTRODUCTION Emperor hotspot track. This lineament is ODP known for its monotonically increasing ODP Many of our ideas of where mantle plumes age progression of volcanoes, and for the originate, how they interact with the convect- prominent bend that marks a change in ing mantle, and how plates moved in the orientation from the westward-trending past rest on interpretations of the Hawaiian- Hawaiian Islands to the northward-trending Emperor Seamounts (Fig. 1). The bend, dated at approximately 43 Ma, is often cited as the clearest physical manifestation of a change in plate motion in a fixed hotspot reference frame (Morgan, 1971). However, attempts to reconcile fixed Atlantic and Pacific basin hotspots have failed to predict the bend (Molnar and Stock, 1987). Norton (1995) suggested that the Hawaiian- Emperor bend records the time when the moving hotspot became fixed in the mantle after moving southward and creating the Emperor seamount chain. Other workers feel the absence of relative motion changes in the North Pacific at the time of the bend is reason enough to question the immobility of hotspots.
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